Optimization of sulphur content in LiMn2O4-ySy spinels as cathode materials for lithium-ion batteries

被引：16
|
作者：
Bakierska, M. [1 ]
Molenda, M. [1 ]
Dziembaj, R. [1 ,2 ]
机构：
[1] Jagiellonian Univ, Fac Chem, Ingardena 3, PL-30060 Krakow, Poland
[2] State Higher Vocat Sch, PL-33100 Tarnow, Poland
来源：
11TH INTERNATIONAL SYMPOSIUM ON SYSTEMS WITH FAST IONIC TRANSPORT (ISSFIT 11) | 2014年 / 98卷
关键词：
Li-ion batteries; cathode material; LiMn2O4; sulphided lithium manganese spinel; sol-gel; SOL-GEL METHOD; MANGANESE SPINELS; ELECTRICAL-PROPERTIES; PERFORMANCE; OXIDE;
D O I：
10.1016/j.proeng.2014.12.482
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Sulphur doped lithium manganese spinels with a nominal composition of LiMn2O4-ySy (0 <= y <= 0.02) were synthesized by a modified sol-gel method followed by calcinations at 300 and 650 degrees C in air. The prepared materials were characterized in terms of physicochemical properties using X-ray powder diffraction (XRD), differential scanning calorimetry (DSC) and electrical conductivity studies (EC). Electrochemical characteristic of Li/Li+/LiMn2O4-ySy cells was examined by galvanostatic charge/discharge tests (CELL TEST), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). It was shown that small amount of sulphur in LiMn2O4 spinel enhances the structural integrity of the host material and increases the electrochemical performance. (C) 2014 The Authors. Published by Elsevier Ltd.
引用
收藏
页码：20 / 27
页数：8
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