In Situ Defect Healing Suppresses Mn Dissolution Chain Reactions in Aqueous Sodium‑Ion Cathodes (IMAGE)
Caption
- A degradation chain reaction triggered by Mn dissolution is revealed, clarifying the continuous performance deterioration caused by Mn dissolution.
- A strategy for in situ surface repair is proposed, which achieves long-term stability through the synergistic action of high-concentration electrolyte and Fe3+ filling of Mn vacancies.
- After 20,000 cycles at a current density of 2 A g−1, the repaired electrode exhibited a capacity retention rate of 80%, outperforming most previously reported manganese-based aqueous sodium-ion battery cathodes.
Credit
Wenqing Du, Lin Xu1, Yi Yang, Jingying Sun, Gongzheng Yang*, Chengxin Wang*.
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License
CC BY-NC-ND