ISSN 1608-4039 (Print)
ISSN 1680-9505 (Online)

катодный материал

Электрохимические характеристики La0.9Sr0.1Sс0.4Mn0.6O3-δ катода в контакте с La0.9Sr0.1SсO3-δ протон-проводящим электролитом

В данной работе цитрат-нитратным методом синтезирован материал La0.9Sr0.1Sс0.4Mn0.6O3-δ, методом импеданса изучены его электрохимические характеристики в составе симметричных ячеек в сравнении с модельным Pt электродом. Показано, что поляризационное сопротивление электрода, изготовленного из исследуемого материала примерно на два порядка ниже поляризационного сопротивления модельного Pt электрода, на основании чего состав La0.9Sr0.1Sс0.4Mn0.6O3-δ может быть предложен как перспективный катодный материал для протон-керамических топливных элементов.

New cathode material La2/3Cu3Ti4 – xFexO12 – δ for solid oxide fuel cell: Synthesis and electrical conductivity

Copper lanthanum titanate La2/3Cu3Ti4−xFexO12−δ x = 0–1 was doped with Fe3+ cations. The diagram of the dependence of the tolerance factor on the relative electronegativity of cations for all studied compositions was represented. It was shown that all the compositions exist in the region of existence of distorted perovskite. X-ray diffraction and X-ray phase analysis methods established the region of existence of solid solutions of La2/3Cu3Ti4−xFexO12−δ obtained by ceramic technology, which was 0 ⩽ x ⩽ 0.4.

НОВЫЙ КАТОДНЫЙ МАТЕРИАЛ ДЛЯ ТВЕРДООКСИДНОГО ТОПЛИВНОГО ЭЛЕМЕНТА L-a2/3Cu3Ti4-xFexO12-: СИНТЕЗ И ЭЛЕКТРОПРОВОДНОСТЬ

В работе проведено допирование катионами Fe3+ титаната лантана меди La2/3Cu3Ti4-xFexO12- (x = 0 ÷ 1). Построена диаграмма зависимости фактора толерантности от относительной электроотрицательности катионов для всех исследуемых составов. Показано, что все составы лежат в области существования искаженного перовскита. Методами рентгеноструктурного и рентгенофазового анализа установлена область существования твердых растворов La2/3Cu3Ti4-xFexO12-, полученных по керамической технологии, которая составила 0 ≤ x ≤ 0,4.

Application of operando X-ray diffraction to evaluate phase transformations of a LiCoVO₄ cathode

Characterization by in situ or operando methods is very important to deeper understand the chemical and electrochemical processes, as well as the degradation processes that occur during the operation of a lithium-ion battery.

Comparative examination of LiyNixCo1-xO2 materials for lithium-ion battery cathodes

A number of LiyNixCo1-xO2 compounds were synthesised by means of solid-state annealing. The synthesis conditions (the raw components, temperature, duration) were optimized so that phases with y > 0.97 were obtained suitable for making positive electrodes for lithium-ionic batteries. The charge-discharge characteristics of such LiyNixCo1-xO2. electrodes were studied.

Lithium-modified manganese oxides as materials for the positive electrode of the lithium batteiy

New phases in the Li2O-MnO2 system were obtained, capable of introducing lithium electrochemically at potentials about 3 V and reversibly. They possess a stable capacity on the level 70-80 mA·hour/g. Due to their low cost, simplicity of synthesis, and high cycling ability, the oxides synthesized show promise as a cathodic material for lithium-ionic batteries.

Study of influence of structural parameters of cathode materials of \alpha -NaFeO2 type on electrochemical characteristics of positive electrode of lithium-ion battery

The relationship between the structural parameters of layered materials such as \alpha -NaFeO2 used as positive electrode materials of lithium-ion battery, and electrochemical characteristics were investigated. The dependence of charge transfer resistance on the ratio of cobalt to lithium mole fractions in layered oxides was studied.

High-voltage Cathode Material Based on LiCoVO? for Lithium-Ion Battery: Development and Research

This paper discusses the prospects for developing a cathode material based on the cobalt(II)-lithium vanadate(V) (LiCoVO4) for a lithium-ion battery, an approach to its preparation and features of the electrochemical behavior.