摘要
为了扩大锂离子电池正极材料Li_xMn_2O_4的工作电压范围,在保证良好循环性能的基础上提高材料的容量,本文对S-Co复合掺杂LiMn_2O_4的合成工艺和电化学性能进行了研究。溶胶-凝胶法合成的各试样均为纯的立方尖晶石相,且结晶状态良好。S-Co复合掺杂综合了S掺杂效应和Co掺杂效应,改善了LiMn_2O_4的电化学性能,在2.4～4.3V充放电压范围内,初始容量较高,达到170mAh/g,30次循环后容量不但没有衰减而且有一定增加。
To extend the charge/discharge voltage range of cathode material LixMn2O4 for Li-ion battery and elevate it's capacity on the basis of good cyclability, the synthesis and electrochemical performance of S-Co co-doped LiMn2O4 were researched. All the samples synthesized by the solgel method possess the structure of the pure cubic spinel phase and the crystallization is superior. The electrochemical performance of LiCo0.1Mn1.9O4-xSx is satisfying too. In voltage range of 2.4similar to4.3V, the initial capacity amounts to 170 mAh/g and it increases to some extent instead of decreasing after 30 cycles.
出处
《无机材料学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第4期942-946,共5页
Journal of Inorganic Materials
基金
国家自然科学基金(59972026)
