化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (3) : 175-177.

科学研究

溶剂热法合成纳米磷酸钴锰锂正极材料及其电化学性能研究

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Study on electrochemical performance of nanosized LiCo_1-xMn_xPO₄ anode material synthesized via solvothermal method

Wang Yanming, Zhu Bo, Liu Xiaoyu, Chen Sheng, Wang Fei

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Received		Published
2016-12-21		2018-03-20
Issue Date	Revised Date
2018-04-09	2016-12-21

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摘要

采用溶剂热法合成了纳米尺寸棒状磷酸钴锰锂(LiCo_1-xMn_xPO₄,x=0.1,0.2,0.3,0.4,0.5)锂离子电池固溶体正极材料。研究了锰(Mn)含量对磷酸钴锂(LiCoPO₄)晶体结构、颗粒尺寸和电化学行为的影响。研究结果表明:随固溶体中Mn含量的增加,材料颗粒尺寸逐渐减小,充放电容量逐渐升高,在Mn含量为0.5%(wt,质量分数)条件下制得的磷酸钴锰锂/碳(LiCo_0.5Mn_0.5PO₄/C)表现出最好的电化学性能,在0.1C、1.0C倍率下的放电容量分别达到137、118mAh/g,具有较好的倍率充放电性能。

Abstract

LiCo_1-xMn_xPO₄ (x=0.1,0.2,0.3,0.4,0.5) nanorodes as anode material for lithium ion battery was synthesized by a solvothermal method.The effect of Mn content on crystalline structure,particle size and electrochemical behavior of LiCoPO₄ were investigated.The test results indicated that the particle size gradually decreased and the reversible capacity gradually increased with rising Mn content.The LiCo_0.5Mn_0.5PO₄/C synthesized with Mn content of 0.5wt% showed the highest electrochemical activity and delivered the discharge capacity of 137mAh/g and 118mAh/g at 0.1C and 1.0C,respectively,illustrating good rate charge/discharge performance.

关键词

锂离子电池 / 正极材料 / 纳米棒 / LiCo_1-xMn_xPO₄

Key words

lithium ion battery / anode material / nanorod / LiCo_1-xMn_xPO₄

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溶剂热法合成纳米磷酸钴锰锂正极材料及其电化学性能研究[J]. 化工新型材料, 2018, 46(3): 175-177 DOI:

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参考文献

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