化工新型材料

化工新型材料 ›› 2018, Vol. 46 ›› Issue (3) : 160-163.

科学研究

固相法合成LiNi_0.8Co_0.15Al_0.05O₂正极材料及其电化学性能研究

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Synthesis and electrochemical performance of LiNi_0.8Co_0.15Al_0.05O₂ anode material by solid phase synthetic method

He Jichuan¹, Wang Hong¹, Zhou Tianming², Yu Guoqiang², Liu Shuxin¹

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Received		Published
2017-10-31		2018-03-20
Issue Date	Revised Date
2018-04-09	2017-10-31

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摘要

以碳酸锂(Li₂CO₃)、三氧化二镍(Ni₂O₃)、三氧化二钴(Co₂O₃)及纳米级氧化铝(Al₂O₃)为原料,采用固相法合成LiNi_0.8Co_0.15Al_0.05O₂(NCA)三元正极材料,通过X射线衍射和扫描电镜对正极材料的物相结构、颗粒大小及形貌进行分析与表征。结果表明:在800℃下煅烧18h的正极材料具有最好的结晶度,粒径在200～400nm之间,粒度分布均匀,没有其他杂质存在。NCA三元正极材料的电化学性能测试表明:充放电过程中Li⁺脱出/嵌入较为容易,循环性能和稳定性良好,首次充电容量为145.8mAh/g,放电容量为142.2mAh/g,电化学性能较好。

Abstract

LiNi_0.8Co_0.15Al_0.05O₂ anode material were synthesized by solid state method and used lithium carbonate (Li₂CO₃),nickelic oxide (Ni₂O₃),cobaltic oxide (Co₂O₃) and nanometer alumina (Al₂O₃) as raw materials.The phase structure,shape and grain size of material were analyzed and characterized by SEM and XRD.The results showed that the anode material synthesized at 800℃ for 18h had best crystallinity and no other impurities,the particles size was between 200 to 400nm,and uniformly distributed.The materials were tested by the charging-discharging,CV and EIS test.The results showed that the first charge capacity was 145.8mAh/g and the discharge capacity was 142.2mAh/g.It indicated that the anode material had better electrochemical properties.

关键词

LiNi_0.8Co_0.15Al_0.05O₂ / 锂离子电池 / 固相法 / 物相结构 / 电化学性能

Key words

LiNi_0.8Co_0.15Al_0.05O₂ / lithium ion battery / solid state method / phase structure / electrochemical property

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固相法合成LiNi_0.8Co_0.15Al_0.05O₂正极材料及其电化学性能研究[J]. 化工新型材料, 2018, 46(3): 160-163 DOI:

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