Dynamic Induction of Conversion−Based Anode Degradation by Valence State and Mechanical Cracks DOI
Shuaitong Liang,

Shuoshuo Liu,

Junping Miao

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Electrochemical energy storage through conversion reactions in crystalline electrode materials primarily depends on the size of guest ions. In this study, a combination synchrotron−based transmission X−ray microscopy and absorption near edge spectroscopy is utilized to reveal dynamic physicochemical changes micro−regions spherical NiS 2 active particles during potassiation/depotassiation process. The findings show that, as degree potassiation increases, visible cracks voids form within bulk material, with significant differences chemical valence states metal elements between inner outer regions. Furthermore, induce formation new cracks, which propagate extensively into bulk, serving root cause particle failure. Based these observations, it also demonstrated that failure phenomenon can be mitigated dimensional engineering strategies, paving way for development high−capacity highly stable potassium−ion batteries.

Language: Английский

Dynamic Induction of Conversion−Based Anode Degradation by Valence State and Mechanical Cracks DOI
Shuaitong Liang,

Shuoshuo Liu,

Junping Miao

et al.

Small, Journal Year: 2025, Volume and Issue: unknown

Published: April 26, 2025

Abstract Electrochemical energy storage through conversion reactions in crystalline electrode materials primarily depends on the size of guest ions. In this study, a combination synchrotron−based transmission X−ray microscopy and absorption near edge spectroscopy is utilized to reveal dynamic physicochemical changes micro−regions spherical NiS 2 active particles during potassiation/depotassiation process. The findings show that, as degree potassiation increases, visible cracks voids form within bulk material, with significant differences chemical valence states metal elements between inner outer regions. Furthermore, induce formation new cracks, which propagate extensively into bulk, serving root cause particle failure. Based these observations, it also demonstrated that failure phenomenon can be mitigated dimensional engineering strategies, paving way for development high−capacity highly stable potassium−ion batteries.

Language: Английский

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