阴极
石墨
电解质
电化学
插层(化学)
材料科学
相间
双功能
化学工程
离子
纳米技术
无机化学
电极
化学
复合材料
物理化学
有机化学
催化作用
工程类
生物
遗传学
作者
Kejia Zhang,Decheng Li,Jie Shao,Yu Jiang,Linze Lv,Qiang Shi,Qunting Qu,Honghe Zheng
出处
期刊:Chemsuschem
[Wiley]
日期:2023-03-16
卷期号:16 (13)
被引量:9
标识
DOI:10.1002/cssc.202300324
摘要
Abstract Dual‐ion batteries (DIBs) with graphite as cathode material, show superiority in terms of sustainability, affordability, and environmental impact over Li‐ion batteries that rely on transition‐metal based cathodes. However, graphite cathodes severely suffer from poor structural stability during anion storage at high potentials because of the co‐intercalation and oxidative decomposition of electrolytes. This work presents an in situ electrochemistry‐driven route to create a bifunctional interphase through implantation of diethylenetriaminepenta(methylene‐phosphonic acid) (DTPMP) on the surface of graphite particles. The reaction mechanisms and functions of DTPMP are investigated both experimentally and theoretically. The DTPMP‐derived interphase not only improves the antioxidative stability of electrolytes but also benefits the desolvation of PF 6 − anions, which doubly protect the graphitic structure and give rise to fast‐charge and ultralong cycling performance of graphite cathodes in DIBs.
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