阳极
电解质
材料科学
相间
阴极
枝晶(数学)
化学工程
金属锂
锂(药物)
极化(电化学)
纳米技术
无机化学
电极
化学
物理化学
医学
遗传学
生物
数学
工程类
内分泌学
几何学
作者
Xinru Li,Yue Tian,Li Shen,Zhibin Qu,Tianqiong Ma,Fei Sun,Xiaoyan Liu,Chen Zhang,John Shen,Xianyang Li,Lina Gao,Shengxiong Xiao,Taifeng Liu,Yi Liu,Yunfeng Lu
标识
DOI:10.1002/adfm.202009718
摘要
Abstract Lithium (Li) metal batteries hold considerable promise for numerous energy‐dense applications. However, the dendritic Li anode produced during Li + /Li deposition‐stripping endangers battery safety and shortens cycle lifespan. Herein, an electrolyte interphase built from 2D anionic covalent organic frameworks (ACOF) is coated on Li for dendrite suppression. The ACOF with Li + ‐affinity facilitates rapid and exclusive passage of Li‐ions from the electrolyte, yielding near‐unity Li + transference number (0.82) and ionic conductivity beyond 3.7 mS cm ‐1 at the interphase. Such high transport efficiency of Li‐ions can fundamentally circumvent the Li + deficiency that results in dendrite formation. Pairing the ACOF‐coated Li against a high‐voltage LiCoO 2 cathode (4.5 V) achieves exceptional cycle stability, mitigated polarization, as well as improved rate capability. Accordingly, this strategy vastly expands the pool of electrolyte interphases that can be used for coating and protecting Li anode.
科研通智能强力驱动
Strongly Powered by AbleSci AI