0.5Li2MnO3·0.5Li(Ni1/3Co1/3Mn1/3)O2 (LLO)was synthesized through a coprecipitation method and preconditioned with mild acid steam.The pristine and acid-treated materials were characterized by X-ray diffraction(XRD),energy dispersive spectrometer (EDS),scanning electron microscopy (SEM),and battery tester to study the effects of acid steam treatment on the structure,morphology and electrochemical properties.The results showed that the mild acid treatment removed the surface Li2O,and formed a trace Ni and Co-doped spinel surface layer on the surface of Li-rich material.Therefore,the side reaction between anode and electrolyte could be inhibited,meanwhile the electrochemical properties of materials could be improved.The initial discharge capacity of LLO after acid steam treatment for 24h can reach 300mAh/g,the coulombic efficiency was 83%,and the capacity retention rate after about 200 cycles was about 78%.
Lv Xiaoxia, Hu Xiaoyu, Chen Jingyan, Yuan Ningyi, Ding Jianning, Liu Zhen
. Electrochemical performance enhancement of Li-rich Mn-based anode material through acid steam treatment[J]. New Chemical Materials, 2021
, 49(3)
: 192
-196
.
DOI: 10.19817/j.cnki.issn 1006-3536.2021.03.043
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