1. Proton Self‐Doped Polyaniline with High Electrochemical Activity for Aqueous Zinc‐Ion Batteries.
- Author
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Yin, Chengjie, Pan, Chengling, Pan, Yusong, Hu, Jinsong, and Fang, Guozhao
- Subjects
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POLYANILINES , *PROTONS , *IONIC conductivity , *PROTON transfer reactions , *METAL-organic frameworks , *ENERGY storage , *CARBOXYL group , *STORAGE batteries - Abstract
Aqueous zinc‐ion batteries are promising energy storage devices due to their low cost, good ionic conductivity, and high safety. Conductive polyaniline is a promising cathode because of its redox activity, but because the neutral electrolyte protonates only weakly, it displays limited electrochemical activity. A polyaniline cathode is developed with proton self‐doping from manganese metal–organic frameworks (Mn–MOFs) that alleviates the deprotonation and electrochemical activity concerns arising during the charge/discharge process. The MOFs carboxyl group provides protons to prevent deprotonation and allows the polyaniline to reach a high zinc storage redox activity. The proton self‐doped polyaniline cathode has a superior specific capacity (273 mAh g−1 at 0.5 A g−1), a high rate property (154 mAh g−1 at 20 A g−1), and excellent cyclability retention (87% over 4000 cycles at 15 A g−1). This research provides fresh insight into the development of innovative polymers as cathode materials for high‐performance AZIBs. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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