电化学
溶解
材料科学
氟
阴极
扩散
兴奋剂
硼
锰
氧化物
无机化学
氧气
过渡金属
电极
化学工程
化学
冶金
物理化学
工程类
光电子学
催化作用
生物化学
物理
有机化学
热力学
作者
Lichen Wu,Hongwei Fu,Lyu Wang,Limei Cha,Apparao M. Rao,Kunkun Guo,Jiang Zhou,Shuangchun Wen,Bingan Lu
出处
期刊:ACS Nano
[American Chemical Society]
日期:2024-05-10
卷期号:18 (20): 13415-13427
被引量:11
标识
DOI:10.1021/acsnano.4c03813
摘要
Layered oxide cathode materials may undergo irreversible oxygen loss and severe phase transitions during high voltage cycling and may be susceptible to transition metal dissolution, adversely affecting their electrochemical performance. Here, to address these challenges, we propose synergistic doping of nonmetallic elements and in situ electrochemical diffusion as potential solution strategies. Among them, the distribution of the nonmetallic element fluorine within the material can be regulated by doping boron, thereby suppressing manganese dissolution through surface enrichment of fluorine. Furthermore, in situ electrochemical diffusion of fluorine from the surface into the bulk of the materials after charging reduces the energy barrier of potassium ion diffusion while effectively inhibiting irreversible oxygen loss under high voltage. The modified K
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