Inner-Sphere Electron Transfer Enabling Highly Reversible Mn2+/MnO2 Conversion toward Energy-Dense Electrolytic Zinc–Manganese Batteries DOI
Weijie Fan, Siyu Tian,

Liping Qin

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 21, 2025

High-voltage electrolytic Zn//MnO2 batteries show great potential for large-scale energy storage due to their affordability, eco-friendliness and high safety. However, practical application is hindered by capacity losses incomplete MnO2 dissolution. Herein, we propose the strategy coupling a 1,4-benzoquinone (1,4-BQ)/hydroquinone (HQ) redox mediator pair with in situ modulation of electronic structure through electrolyte engineering facilitate rapid complete During charging discharging processes, Al3+ ions enter lattice co-deposition intercalation, respectively. The incorporated effectively optimize lowering valence state localized MnIV MnIII, thereby facilitating formation inner-sphere complexes HQ molecules. This transformation successfully shifts dominant reaction mechanism between from outer-sphere electron transfer (MnIV-HQ) (MnIII-HQ). Consequently, dissolution can be achieved designed even at an ultrahigh areal 50 mAh cm-2. Furthermore, 750-mAh battery exhibits retention rate 99% after 100 cycles, demonstrating significance regulating mechanisms during strategies.

Language: Английский

Inner-Sphere Electron Transfer Enabling Highly Reversible Mn2+/MnO2 Conversion toward Energy-Dense Electrolytic Zinc–Manganese Batteries DOI
Weijie Fan, Siyu Tian,

Liping Qin

et al.

Journal of the American Chemical Society, Journal Year: 2025, Volume and Issue: unknown

Published: May 21, 2025

High-voltage electrolytic Zn//MnO2 batteries show great potential for large-scale energy storage due to their affordability, eco-friendliness and high safety. However, practical application is hindered by capacity losses incomplete MnO2 dissolution. Herein, we propose the strategy coupling a 1,4-benzoquinone (1,4-BQ)/hydroquinone (HQ) redox mediator pair with in situ modulation of electronic structure through electrolyte engineering facilitate rapid complete During charging discharging processes, Al3+ ions enter lattice co-deposition intercalation, respectively. The incorporated effectively optimize lowering valence state localized MnIV MnIII, thereby facilitating formation inner-sphere complexes HQ molecules. This transformation successfully shifts dominant reaction mechanism between from outer-sphere electron transfer (MnIV-HQ) (MnIII-HQ). Consequently, dissolution can be achieved designed even at an ultrahigh areal 50 mAh cm-2. Furthermore, 750-mAh battery exhibits retention rate 99% after 100 cycles, demonstrating significance regulating mechanisms during strategies.

Language: Английский

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