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Permeable characteristics of surface film deposited on LiMn2O4 positive electrode revealed by redox-active indicator
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- Authors
- Issue Date
- 2021-07-14
- Publisher
- Springer Open
- Citation
- Nano Convergence. 2021 Jul 14;8(1):21
- Keywords
- Lithium-ion batteries ; Electrolytes ; Permeable characteristics ; Surface flm ; Positive electrode
- Abstract
- Herein, the ferrocene redox indicator-based surface film characteristics of spinel lithium manganese oxide (LMO) were evaluated. The pre-cycling of spinel LMO generated a film on the LMO surface. The surface film deposited on LMO surface suppresses further electrolyte decomposition, while the penetration of approximately 0.7 nm-sized redox indicator is not prevented. The facile self-discharge of LMO and regeneration current from the ferrocenium molecule was observed from the redox indicator in a specifically designed four-electrode cell. From this electrochemical behavior, a small-sized HF molecule attack on the LMO surface through a carbonate-based electrolyte-derived film is defined; hence, the prevention of small-sized molecules into the deposited surface film is crucial for the enhancement of LiMn2O4-based lithium-ion batteries.
- ISSN
- 2196-5404
- Language
- English
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