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See detailPrecision measurement of radioactivity in Gamma-rays spectrometry using two HPGe detectors (BEGe-6530 and GC0818-7600SL models) comparison techniques: Application to the soil measurement.
Guembou Shouop, Cébastien Joel ULg; Samafou Penabei; NDONTCHUENG MOYO, Maurice et al

in MethodsX (2017), 4(42-54), 2017

To obtain high quality of results in gamma spectrometry, it is necessary to select the best HPGe detector for particular measurements, to calibrate energy and efficiency of gamma detector as accurate as ... [more ▼]

To obtain high quality of results in gamma spectrometry, it is necessary to select the best HPGe detector for particular measurements, to calibrate energy and efficiency of gamma detector as accurate as possible. To achieve this aim, the convenient detector model and gamma source can be very useful. The purpose of this study was to evaluate the soil specific activity using two HPGe model (BEGe-6530 and GC0818-7600SL) by comparing the results of the two detectors and the technics used according to the detector type. The relative uncertainty activity concentration was calculated for 226Ra, 232Th and 40K. For broad energy germanium detector, BEGe-6530, the relative uncertainty concentration ranged from 2.85 to 3.09% with a mean of 2.99% for 226Ra, from 2.29 to 2.49% with a means of 2.36% for 232Th and from 3.47 to 22.37% with a mean of 12.52% for 40K. For GC0818-7600SL detector, it was ranged from 10.45 to 25.55% with a mean of 17.10% for 226Ra, from 2.54 to 3.56% with a means of 3.10% for 232Th and from 3.42 to 7.65% with a mean of 5.58% for 40K. The average report between GC0818-7600SL model and BEGe-6530 model was calculated and showed the mean value of 3.36. The main study was based on the following points: • Determination of The relative uncertainty activity concentration of 226Ra, 232Th and 40K • Determination of the relative uncertainty related to the radium equivalent activity to compare the performance of the two detection systems • Proved that the activity concentration determination in gamma spectrometry depended on the energy range emitted by a radionuclide. This study showed that the standard deviation measurement was less important to the result realized with BEGe-6530 HPGe model. Our findings were demonstrated that the results of the Broad Energy Germanium detector were more reliable. [less ▲]

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See detailL’accès des filles à l’enseignement supérieur au Burkina Faso : choix parentaux, parcours d’étudiantes et défis
Wouango, Joséphine ULg

in International Review of Education (2017), 63(2),

Qu'est-ce qui motive les parents des milieux moins aisés à investir dans une scolarisation prolongée de leurs filles ? Qu'est-ce qui amène les filles issues de ces milieux à se maintenir dans le système ... [more ▼]

Qu'est-ce qui motive les parents des milieux moins aisés à investir dans une scolarisation prolongée de leurs filles ? Qu'est-ce qui amène les filles issues de ces milieux à se maintenir dans le système scolaire jusqu'à l'université ? De nombreuses recherches sur le système éducatif burkinabé montrent qu'il existe encore des disparités entre filles et garçons à tous les niveaux, avec une aggravation de l'écart à mesure que le niveau d'études augmente. Dans ces conditions, la perspective pour des filles issues de familles moins aisées de poursuivre des études supérieures est moins certaine. Pourtant, on remarque une relative présence de filles issues de ces milieux à l'université de Ouagadougou. À partir d'une enquête qualitative auprès d'étudiantes et de leurs parents, cet article met en exergue les logiques sociales qui expliquent le parcours scolaire particulier de ces filles. Le niveau de scolarisation des aînés, la place de la fille dans la fratrie ou le souci d'équité sont des facteurs à l'origine du choix de certains parents de scolariser leurs filles. Les parents se réfèrent à plusieurs formes de justification en faveur des études universitaires des filles, parmi lesquelles la logique de fidélité des filles dans le retour de l’aide revient à de multiples reprises. Quant aux étudiantes, elles évoquent des motivations diverses pour expliquer leur parcours scolaire et universitaire, souvent émaillé de difficultés, notamment la volonté d’aider leurs parents. L’article montre en outre l’importance du soutien familial dans l’entrée des filles à l’école et à l’université, ainsi que dans la poursuite et la réussite de leurs études. [less ▲]

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See detailEuropean consensus-based (S2k) Guideline on the Management of Herpes Zoster - guided by the European Dermatology Forum (EDF) in cooperation with the European Academy of Dermatology and Venereology (EADV), Part 2: Treatment
WERNER R.N.; NIKKELS, Arjen ULg; MARINOVIC B. et al

in Journal of the European Academy of Dermatology & Venereology (2017)

Herpes zoster (HZ, shingles) is a frequent medical condition which may severely impact the quality of life of affected patients. Different therapeutic approaches to treat acute HZ are available. The aim ... [more ▼]

Herpes zoster (HZ, shingles) is a frequent medical condition which may severely impact the quality of life of affected patients. Different therapeutic approaches to treat acute HZ are available. The aim of this European project was the elaboration of a consensus-based guideline on the management of patients who present with HZ, considering different patient populations and different localizations. This interdisciplinary guideline aims at an improvement of the outcomes of the acute HZ management concerning disease duration, acute pain and quality of life of the affected patients and at a reduction in the incidence of postherpetic neuralgia (PHN) and other complications. The guideline development followed a structured and pre-defined process, considering the quality criteria for guidelines development as suggested by the AGREE II instrument. The steering group was responsible for the planning and the organization of the guideline development process (Division of Evidence-Based Medicine, dEBM). The expert panel was nominated by virtue of clinical expertise and/or scientific experience and included experts from the fields of dermatology, virology/infectiology, ophthalmology, otolaryngology, neurology and anaesthesiology. Recommendations for clinical practice were formally consented during the consensus conference, explicitly considering different relevant aspects. The guideline was approved by the commissioning societies after an extensive internal and external review process. In this second part of the guideline, therapeutic interventions have been evaluated. The expert panel formally consented recommendations for the treatment of patients with HZ (antiviral medication, pain management, local therapy), considering various clinical situations. Users of the guideline must carefully check whether the recommendations are appropriate for the context of intended application. In the setting of an international guideline, it is generally important to consider different national approaches and legal circumstances with regard to the regulatory approval, availability and reimbursement of diagnostic and therapeutic interventions. [less ▲]

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See detailEuropean consensus-based (S2k) Guideline on the Management of Herpes Zoster - guided by the European Dermatology Forum (EDF) in cooperation with the European Academy of Dermatology and Venereology (EADV), Part 1: Diagnosis
WERNER R. N.; NIKKELS, Arjen ULg; MARINOVIC B. et al

in Journal of the European Academy of Dermatology & Venereology (2017), 31

Herpes zoster (HZ, shingles) is a frequent medical condition which may severely impact the quality of life of affected patients. Different therapeutic approaches to treat acute HZ are available. The aim ... [more ▼]

Herpes zoster (HZ, shingles) is a frequent medical condition which may severely impact the quality of life of affected patients. Different therapeutic approaches to treat acute HZ are available. The aim of this European project was the elaboration of a consensus-based guideline on the management of patients who present with HZ, considering different patient populations and different localizations. This interdisciplinary guideline aims at an improvement of the outcomes of the acute HZ management concerning disease duration, acute pain and quality of life of the affected patients and at a reduction of the incidence of postherpetic neuralgia and other complications. The guideline development followed a structured and predefined process, considering the quality criteria for guidelines development as suggested by the AGREE II instrument. The steering group was responsible for the planning and the organization of the guideline development process (Division of Evidence based Medicine, dEBM). The expert panel was nominated by virtue of clinical expertise and/or scientific experience and included experts from the fields of dermatology, virology/infectiology, ophthalmology, otolaryngology, neurology and anaesthesiology. Recommendations for clinical practice were formally consented during the consensus conference, explicitly considering different relevant aspects. The guideline was approved by the commissioning societies after an extensive internal and external review process. In this first part of the guideline, diagnostic means have been evaluated. The expert panel formally consented recommendations for the management of patients with (suspected) HZ, referring to the assessment of HZ patients, considering various specific clinical situations. Users of the guideline must carefully check whether the recommendations are appropriate for the context of intended application. In the setting of an international guideline, it is generally important to consider different national approaches and legal circumstances with regard to the regulatory approval, availability and reimbursement of diagnostic and therapeutic interventions. [less ▲]

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See detailRegards croisés sur deux dispositifs de formation technopédagogique, leur outillage conceptuel et l’évaluation de leurs bénéfices
Loisy, Catherine; Van de Poël, Jean-François ULg; Verpoorten, Dominique ULg

in Detroz, Pascal; Crahay, Marcel; Fagnant, Annick (Eds.) L'évaluation à la lumière des contextes et des disciplines (2017)

Ce chapitre décrit deux projets de formation et d’accompagnement techno-pédagogique mobilisant diversement le modèle TPaCK. Le premier projet (DevSup) y recourt pour soutenir la réflexivité des acteurs ... [more ▼]

Ce chapitre décrit deux projets de formation et d’accompagnement techno-pédagogique mobilisant diversement le modèle TPaCK. Le premier projet (DevSup) y recourt pour soutenir la réflexivité des acteurs sur leurs pratiques pédagogiques avec le numérique, en s’appuyant sur une activité d’auto-confrontation. Cette approche qualitative est réalisée avec un nombre restreint de participants. Le second projet (IFRES-eCampus) dispense des formations techno-pédagogiques courtes à une population importante d’enseignants du supérieur. Le TPaCK est ici utilisé dans une fonction structurante portant sur la définition et le sens de l’offre de formation. Le chapitre, qui s’apparente à une étude de cas, établit trois convergences entre ces dispositifs : a) ils adoptent un modèle de référence identique et récent en soutien conceptuel de leur action de formation, b) ils entendent inscrire cette dernière dans une perspective développementale, c) ils partagent un souci commun d’en évaluer les effets sur les participants. A l’heure où le recours aux technologies se profile comme une composante importante de l’activité professorale dans le supérieur, le présent chapitre contribue aux discussions sur le rôle d’un modèle théorique comme vecteur d’intelligibilité pour la réflexion professionnelle des accompagnateurs techno-pédagogiques et des enseignants avec qui ils travaillent. [less ▲]

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See detailEtude rétrospective du bilan thyroïdien: définition de valeurs de référence pédiatriques
LADANG, Aurélie ULg; VRANKEN, Laura ULg; LUYCKX, Françoise ULg et al

in Revue Médicale de Liège (2017)

Defining reference range is an essential tool for diagnostic. Age and sexe influences on thyroid hormone levels have been already discussed. In this study, we are defining a new pediatric reference range ... [more ▼]

Defining reference range is an essential tool for diagnostic. Age and sexe influences on thyroid hormone levels have been already discussed. In this study, we are defining a new pediatric reference range for TSH, FT3 and FT4 for Cobas C6000 analyzer. To do so, we have taken in account 0 to 18 year old outclinic patients. During the first year of life, thyroid hormone levels change dramatically before getting stabilized around 3 years old. We also compared our results to those obtained in a Canadian large-scale prospective study (the CALIPER initiative). [less ▲]

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See detailApplication of discrete choice experiment to assess farmers’ willingness to report swine diseases in the Red River Delta region, Vietnam
Pham Thi Thanh, Hoa; Peyre, Marisa; Quang Trinh, Tuyen et al

in Preventive Veterinary Medicine (2017), 138

A discrete choice experiment (DCE) is carried out to value socio-economic factors influencing the farmer’s decision to report swine diseases and to assess the willingness of farmers to report swine ... [more ▼]

A discrete choice experiment (DCE) is carried out to value socio-economic factors influencing the farmer’s decision to report swine diseases and to assess the willingness of farmers to report swine diseases. Data were collected between March and July 2015 in two provinces in the Red River Delta, Northern Vietnam, from 196 pig producers by face-to face interview. A conditional logit model is used to measure the relative importance of the socio-economic factors and calculate the expected probability of disease reporting under changes of levels of these factors. Results of the study indicated that the likelihood of compensation and the type of culling implemented (all or only unrecovered pigs) are the two most important factors influencing farmer reporting. Compensation level, movement restriction and delay in compensation payment also have significant impacts on farmer’s decision to report animal disease but they are not as important as the above factors. Three different scenarios including changes in six different factors (attributes) are tested to predict probability of animal disease reporting. Under the current situation (uncertainty of being compensated), only 4% of the farmers would report swine disease outbreak to the official surveillance system if the culling policy involves all pigs in affected farms. This number is increased to 26% if culling in affected farms is restricted to unrecovered pigs only. Ensuring certainty of compensation increases reporting probability by up to 50% and 90% if all or only unrecovered pigs are destroyed, respectively. The results of this study are important for improving the performance and sustainability of swine disease surveillance system in Vietnam. [less ▲]

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See detailMulti-approach analysis to assess diet of harbour porpoises Phocoena phocoena in the southern North Sea
Mahfouz, C.; Meziane, T.; Henry, F. et al

in Marine Ecology. Progress Series (2017), 563

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See detailThe Role of Companies in Smart City Initiatives: The Case of Belgium
Andre, Anne-Marie; Crutzen, Nathalie ULg

in Economia (2017)

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See detailOral contraceptive and acute intestinal ischemia with mesenteric venous thrombosis: a case report
BELIARD, Aude ULg; VERRETH, Lucie; GRANDJEAN, Pascale

in Open Access Journal of Contraception (2017), 8

Background: Venous thrombosis is a serious complication of combined contraceptive. However, mesenteric venous thrombosis and intestinal necrosis are infrequently seen in women using oral contraceptives ... [more ▼]

Background: Venous thrombosis is a serious complication of combined contraceptive. However, mesenteric venous thrombosis and intestinal necrosis are infrequently seen in women using oral contraceptives and diagnosis is often delayed. Case presentation: We report a case of a 38-year-old obese female patient who presented with acute abdominal pain. A bowel infection was first diagnosed and treated with antibiotics. Contrast-enhanced tomography of the abdomen revealed diffuse ischemia of small intestine with superior mesenteric thrombosis. Laparotomy with segmental resection of both small and large bowel was performed. No predisposing factor of mesenteric venous thrombosis was demonstrated except association of combined contraceptive with obesity. Conclusion: This report highlights the need for clinicians to suspect venous mesenteric thrombosis in women of reproductive age with acute abdominal pain with poor physical findings. Detailed personal history including prescriptions should help to quickly and accurately determine the problem. [less ▲]

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See detailL'État rend-t-il encore la justice?
Bouhon, Frédéric ULg

Article for general public (2017)

Cet article aborde sommairement la question de l'évolution du rôle de l'État dans la mission qui consiste à rendre la justice. Il s'insère dans un dossier consacré au réformes judiciaires.

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See detailLe castor, porte-parole d'une rivière vivante
Denayer, Dorothée ULg; Semal, Nathalie ULg

in Mille Lieux (2017), 4

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See detailAnalysis of Kids’ Athletics implementation in Wallonia
Jidovtseff, Boris ULg; Wuillaume, Sandrine; Cloes, Marc ULg

in Sakslahti, Arja (Ed.) Book of abstracts (2017, January)

Introduction Since decades in Wallonia (French speaking part of Belgium), athletics competitions for children are miniaturized versions of adults’ competitions. Despite the fact that it has been pointed ... [more ▼]

Introduction Since decades in Wallonia (French speaking part of Belgium), athletics competitions for children are miniaturized versions of adults’ competitions. Despite the fact that it has been pointed out that such kind of approach, based on performance, is not appropriated for motor learning and could result in an increased rate of dropout (1), no change has occurred since years. The International Association of Athletic Federation has developed and promoted a more appropriate model of competition for children under 10 years old: ‘Kids’Athletics’ (KA)(2). While this model is well known, it has not been selected by the Wallonian federation as the gold standard yet . This study aimed to analyze the perceived interest of a group of experts about KA, and to identify the strategies that could be considered for KA implementation in Wallonia. Methods Semi-structured interviews were conducted with 14 athletics or marketing experts (demographic presentation; knowledge about KA and personal experience with KA ; opinion about KA model in comparison with the traditional one, and ; strategies that could be helpful to implement KA in Wallonia). Results Findings showed that 12 experts knew the KA concept while 9 have experimented it in their own club. None mentioned an official competition between clubs. A list of KA’s advantages and disadvantages has been identified (organization, children needs, and development). All experts considered that KA was more adapted to children than traditional competition. Based on subjects’ proposals, a progressive strategy for KA implementation is suggested. It includes the support of the federation and recommends to start with the more convinced clubs. Conclusion This study confirms that KA should be implemented in Wallonia. In order to optimize the chances of success, it would be appropriate to multiply actions, taking into account the potential barriers identified by the experts. Keywords : Children, track and field, competition, Kids Athletics, Wallonia. References Gozzoli C., Locatelli, E., Massin, D., & Wangemann, B.. (2002). IAAF Kids’ Athletics : A team event for children. Monaco: IAAF Shields, D. L. & Bredemeier, B. L. (2009). True competition: A guide to pursuing excellence in sport and society. Champaign, IL: Human Kinetics. [less ▲]

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See detailLe système d’accueil et les formations initiales des professionnel-le-s de l’enfance (0-12 ans) au Québec
Housen, Marie ULg; Pirard, Florence ULg

Report (2017)

Dans le suivi de la recherche sur les formations initiales dans l'accueil de l'enfance (Pirard al., 2015), ce rapport présente le système éducatif et de formation au Québec ainsi qu'un programme de ... [more ▼]

Dans le suivi de la recherche sur les formations initiales dans l'accueil de l'enfance (Pirard al., 2015), ce rapport présente le système éducatif et de formation au Québec ainsi qu'un programme de formation novateur mis en place au Collège d’enseignement général et professionnel (Cégep) de Saint-Hyacinthe depuis 2005. Ce programme, unique au Québec, vise à pallier aux difficultés de transfert des compétences des étudiantes en situation réelle complexe grâce à un accompagnement in situ des enseignantes centré sur les processus de la pratique réflexive. Ce rapport fait suite à la journée d'étude du 22 juin 2016 avec la contribution de la Pr Nathalie Bigras (Université du Québec à Montréal) et Lise Tétreau (enseignante au niveau collégial). [less ▲]

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See detailEvaluations à large échelle : prendre la juste mesure des effets de contexte
Lafontaine, Dominique ULg

in Detroz, Pascal; Crahay, Marcel; Fagnant, Annick (Eds.) L'évaluation à la lumière des contextes et des disciplines (2017)

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See detailDynamics and emissions of N2O in groundwater: A review
Jurado Elices, Anna ULg; Borges, Alberto ULg; Brouyère, Serge ULg

in Science of the Total Environment (2017), 584-585C

This work reviews the concentrations, the dynamics and the emissions of nitrous oxide (N2O) in groundwater. N2O is an important greenhouse gas (GHG) and the primary stratospheric ozone depleting substance ... [more ▼]

This work reviews the concentrations, the dynamics and the emissions of nitrous oxide (N2O) in groundwater. N2O is an important greenhouse gas (GHG) and the primary stratospheric ozone depleting substance. The major anthropogenic source that contributes to N2O generation in aquifers is agriculture because the use of fertilizers has led to the widespread groundwater contamination by inorganic nitrogen (N) (mainly nitrate, NO3−). Once in the aquifer, this inorganic N is transported and affected by several geochemical processes that produce and consume N2O. An inventory of dissolved N2O concentrations is presented and the highest dissolved concentration is about 18.000 times higher than air-equilibrated water (up to 4004 μg N L-1). The accumulation of N2O in groundwater is mainly due to denitrification and to lesser extent to nitrification. Their occurrence depend on the geochemical (e.g., NO3−, dissolved oxygen, ammonium and dissolved organic carbon) as well as hydrogeological parameters (e.g., groundwater table fluctuations and aquifer permeability). The coupled understanding of both parameters is necessary to gain insight on the dynamics and the emissions of N2O in groundwater. Overall, groundwater indirect N2O emissions seem to be a minor component of N2O emissions to the atmosphere. Further research might be devoted to evaluate the groundwater contribution to the indirect emissions of N2O because this will help to better constraint the N2O global budget and, consequently, the N budget. [less ▲]

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See detailA comprehensive system of control characters for Ancient Egyptian hieroglyphic text in Unicode
Nederhof, Mark-Jan; Rajan, Vinodh; Lang, Johannes et al

Computer development (2017)

We propose a comprehensive system of control characters for encoding Ancient Egyptian hieroglyphs in Unicode.

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See detailConvention Région wallonne et HGE-ULg Caractérisation complémentaire des masses d’eau dont le bon état dépend d’interactions entre les eaux de surface et les eaux souterraines - Délivrable D1.8 Rapport final
Brouyère, Serge ULg; Briers, Pierre ULg; Descy, Jean-Pierre et al

Report (2017)

Mechanisms of interactions between groundwater bodies and rivers whose status and anthropogenic use can be detrimental from a quantitative and qualitative point of view to one or the other of these two ... [more ▼]

Mechanisms of interactions between groundwater bodies and rivers whose status and anthropogenic use can be detrimental from a quantitative and qualitative point of view to one or the other of these two compartments of the water cycle. In addition, contamination of groundwater by nitrate remains relevant. Based on these observations, a study financed by the Public Service of Wallonia was carried out over a period of 39 months to investigate (1) the direction, importance and dynamics of water exchange between groundwater and rivers at the scale of a river section; (2) the impact of these interactions on river baseflows and the river ecological status as a function of groundwater withdrawal and recharge at the catchment scale; (3) mechanisms and timing of transfer and abatement of pollutants (nitrate) between groundwater and surface waters at the watershed scale. The consequences of these mechanisms on the medium- and long-term evolution of groundwater and surface water quality were to be determined. To achieve this, the project relied on the implementation of a series of field investigations essentially focused on the interfaces between surface water and groundwater compartments (soil and unsaturated zone and water-table interface), while acquiring additional information on groundwater. The investigations carried out in the watersheds of the upstream Hoyoux and Triffoy watershed in the Condroz region aimed to provide 6 specific responses to water quantity and quality issued associated with groundwater – surface water interactions in the selected basins and generic responses in the form of new knowledge concerning the mechanisms of recharge and groundwater - river exchanges, concerning the evolution of nitrate concentrations in watersheds, data and measurements for the parameterization of models, and water resources management tools in the form of quantitative and qualitative indicators for groundwater - surface water interactions. [less ▲]

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See detailThe design and study of new Li-ion full cells of LiCo2/3Ni1/6Mn1/6O2 positive electrode paired with MnSn2 and Li4Ti5O12 negative electrodes
Mahmoud, Abdelfattah ULg; Saadoune, Ismael; Lippens, Pierre-Emmanuel et al

in Solid State Ionics (2017), 300

We report evidence for the electrochemical performances of two Li-ion full cells, built up by the combination of LiCo2/3Ni1/6Mn1/6O2 cathode material with MnSn2 intermetallic and Li4Ti5O12 spinel as the ... [more ▼]

We report evidence for the electrochemical performances of two Li-ion full cells, built up by the combination of LiCo2/3Ni1/6Mn1/6O2 cathode material with MnSn2 intermetallic and Li4Ti5O12 spinel as the anode materials, respectively. MnSn2 and Li4Ti5O12 electrode materials illustrate different working voltage versus the redox couple Li+/Li0 and different reactionmechanisms during lithiuminsertion/deinsertion cycles. The structure,morphological characteristics and the electrochemical properties of the studied materialswere investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM) and electrochemical techniques. The two full-cell configurations showed different electrochemical behaviors. The MnSn2//LiCo2/3Ni1/6Mn1/6O2 configuration exhibits high working voltage (~3.5 V) and specific capacity (~200 mAh/gcathode) but suffers from high irreversible capacity loss during the first cycles and capacity fading during cycling. The Li4Ti5O12//LiCo2/3Ni1/6Mn1/6O2 cell demonstrated excellent cycling properties at different C-rates with 100% capacity retention after 150 cycles at 1 C. Although the working voltage (~2.2 V) and the specific capacity (~140 mAh/gcathode) are lower than those of the MnSn2//LiCo2/3Ni1/6Mn1/6O2 configuration, the other measured electrochemical properties suggest that the Li4Ti5O12//LiCo2/3Ni1/6Mn1/6O2 full cell is a potential candidate for battery application due to its excellent cycling performance and improved safety. [less ▲]

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