氢氟酸
阴极
材料科学
电解质
法拉第效率
溶解
电极
高压
化学工程
碳纤维
纳米技术
电压
化学
物理化学
复合材料
复合数
物理
工程类
冶金
量子力学
作者
Qian Chang,Fan Wang,Zicheng Zuo,Feng He,Yao Zhao,Fuyi Wang,Yuliang Li
出处
期刊:Small
[Wiley]
日期:2021-08-08
卷期号:17 (38)
被引量:17
标识
DOI:10.1002/smll.202102066
摘要
Abstract Suppressing the irreversible interfacial reactions is an important scientific bottleneck in the development of stable high‐energy‐density lithium‐ion battery. The interfacial chemistry of graphdiyne (GDY) on the high‐voltage cathode of LiNi 0.5 Mn 1.5 O 4 (LNMO) shows a very interesting process, in which the sp‐hybridization carbon atoms chemically scavenge the hydrofluoric acid (HF) and in situ form the fluorinated GDY interface. It first turns the harmful HF into profit, and greatly enhances the interfacial stability and restrains the side reaction on the cathode under high working voltage. The GDY‐coated LNMO cathode obviously alleviates the electrolyte degradation, achieves high Coulombic efficiency and reliability. Due to atomic‐level selectivity and chemical trapping of HF by GDY, it effectively suppresses the dissolution of Mn, Ni elements. These results highlight the unparalleled advantages of GDY in the formation of high stable interfaces and protection of high‐energy‐density electrodes.
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