钴镧掺杂富锂型锰酸锂制备及其性能

doi:10.61558/2993-074X.1958

电化学（中英文） ›› 2009, Vol. 15 ›› Issue (1): 74-78. doi: 10.61558/2993-074X.1958

钴镧掺杂富锂型锰酸锂制备及其性能

周大桥;

南开大学新能源材料化学研究所;

收稿日期:2009-02-28 修回日期:2009-02-28 出版日期:2009-02-28 发布日期:2009-02-28

Preparation and Performance of Co and La Co-doped Li-rich Lithium Manganate

ZHOU Da-qiao

(Institute of New Energy Material Chemistry,Nankai University,Tianjin 300071,China

Received:2009-02-28 Revised:2009-02-28 Published:2009-02-28 Online:2009-02-28

摘要/Abstract

摘要： 应用共沉淀-高温固相法制备钴镧共掺杂富锂型Li1.1Co0.02La0.01Mn2O4材料.X射线衍射(XRD)和扫描电镜(SEM)测试表明,在700~850℃的焙烧温度范围内,合成材料为单相,但随着焙烧温度升高,材料结晶度上升,粒径增大,比表面减小.该材料具有较小的极化电阻,以其作正极(800℃焙烧)组成扣式电池具有最佳电化学性能,1 C倍率50周循环充放电容量保持率达98.5%.

关键词: 锂离子电池, 锰酸锂, 钴掺杂, 镧掺杂, 电化学性能

Abstract: The cathode material of Li1.1Co0.02La0.01Mn2O4 was successfully synthesized by the method of co-precipitation followed by a solid state reaction.In the sintering temperature range of 700～850 ℃,X-ray diffraction(XRD) results showed a single phase of each material and the increase of crystallization degree,and scanning electron microscopic(SEM) images indicated that the particle size increased and the specific surface area decreased,respectively,with increasing the sintering temperature.Due to its lower polarization resistance,the Co and La co-doped lithium-rich lithium manganate(sintered at 800 ℃) positive electrodes showed the most promising electrochemical performance.The capacity retention after 50 cycles reached 98.5%.

Key words: lithium-ion battery, LiMn2O4, co-doped, La-doped, electrochemical performance

中图分类号:

TM912

周大桥, . 钴镧掺杂富锂型锰酸锂制备及其性能[J]. 电化学（中英文）, 2009, 15(1): 74-78.

ZHOU Da-qiao. Preparation and Performance of Co and La Co-doped Li-rich Lithium Manganate[J]. Journal of Electrochemistry, 2009, 15(1): 74-78.

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钴镧掺杂富锂型锰酸锂制备及其性能

Preparation and Performance of Co and La Co-doped Li-rich Lithium Manganate

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