化工新型材料

化工新型材料 ›› 2021, Vol. 49 ›› Issue (7) : 151-157. DOI: 10.19817/j.cnki.issn 1006-3536.2021.07.035

科学研究

Li₂ZrO₃包覆富锂Li_1.20Mn_0.44Ni_0.32Co_0.04O₂改性正极材料的制备及电化学性能研究

作者信息 +

Synthesis and electrochemical property of Li₂ZrO₃ coated Li-rich Li_1.20Mn_0.44Ni_0.32Co_0.04O₂ cathode material

Wang Juan, Mu Wei, Ren Lei, Yang Fenghuan, Gao Jun, Yu Hengxing, Jia Pengfei

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Received
2021-02-08
Issue Date	Revised Date
2021-08-19	2021-02-08

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摘要

富锂层状氧化物以其高放电比容量和低成本优势而成为重要的锂离子电池正极材料。将拥有供锂离子迁移的三维通道的Li₂ZrO₃导体包覆在富锂层状正极材料Li_1.20Mn_0.48Ni_0.24Co_0.08O₂表面,期望改善其综合电化学性能。系统地研究了Li₂ZrO₃包覆及不同包覆量对Li_1.20Mn_0.48Ni_0.24Co_0.08O₂的晶体结构,颗粒形貌和电化学性能影响。电化学测试结果证实Li₂ZrO₃包覆改性能够显著提高Li_1.20Mn_0.48Ni_0.24Co_0.08O₂的首次库伦效率,高倍率和低温放电能力,以及循环稳定性。

Abstract

The Li-rich layer oxides have been regarded as the main candidate as cathode material for the Li-ion battery owing to the high discharge capacity and low cost.The Li₂ZrO₃ ion-conductor with 3D tunnels for Li⁺ diffusion was used to cover on the surface of Li_1.20Mn_0.48Ni_0.24Co_0.08O₂,and expectedly enhanced the electrochemical properties.The electrochemical tests verified that the Li₂ZrO₃ coating could effectively improve the initial coulombic efficiency,the discharge capacity at the high rate and low temperature,and cyclic stability.

关键词

Li_1.20Mn_0.48Ni_0.24Co_0.08O₂ / Li₂ZrO₃包覆改性 / 锂离子导体 / 稳定的循环性能

Key words

Li_1.20Mn_0.48Ni_0.24Co_0.08O₂ / Li₂ZrO₃ cover modification / Li-ion conductor / stable cyclic performance

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Li₂ZrO₃包覆富锂Li_1.20Mn_0.44Ni_0.32Co_0.04O₂改性正极材料的制备及电化学性能研究[J]. 化工新型材料, 2021, 49(7): 151-157 DOI:10.19817/j.cnki.issn 1006-3536.2021.07.035

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