阴极
电解质
镍
锂(药物)
阳极
材料科学
石墨
化学工程
电极
电化学
过渡金属
无机化学
化学
复合材料
冶金
有机化学
物理化学
工程类
内分泌学
催化作用
医学
作者
Biyu Jin,Zehao Cui,Arumugam Manthiram
标识
DOI:10.1002/anie.202301241
摘要
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 LiNi0.8 Mn0.1 Co0.1 O2 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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