电解质
锂(药物)
镍
阳极
阴极
石墨
材料科学
过渡金属
电极
电化学
氧化物
无机化学
化学工程
化学
冶金
物理化学
催化作用
有机化学
医学
工程类
内分泌学
作者
Biyu Jin,Zehao Cui,Arumugam Manthiram
标识
DOI:10.1002/ange.202301241
摘要
Abstract The practical viability of high‐nickel layered oxide cathodes is compromised by the interphasial and structural degradations. Herein, we demonstrate that by applying an in situ interweaved binder, the cycling stability of high‐nickel cathodes can be significantly improved. Specifically, the results show that the resilient binder network immobilizes the transition‐metal ions, suppresses electrolyte oxidative decomposition, and mitigates cathode particles pulverization, thus resulting in suppressed cathode‐to‐anode chemical crossover and ameliorated chemistry and architecture of electrode‐electrolyte interphases. Pouch full cells with high‐mass‐loading LiNi 0.8 Mn 0.1 Co 0.1 O 2 cathodes achieve 0.02 % capacity decay per cycle at 1 C rate over 1 000 deep cycles at 4.4 V (vs. graphite). This work demonstrates a rational structural and compositional design strategy of polymer binders to mitigate the structural and interphasial degradations of high‐Ni cathodes in lithium‐ion batteries.
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