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Inherent Water Competition Effect-Enabled Colloidal Electrode for Ultra-stable Aqueous Zn-I Batteries

Journal of the American Chemical Society, ISSN: 1520-5126, Vol: 146, Issue: 43, Page: 29513-29522
2024
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Article Description

Electrode material stability is crucial for the development of next-generation ultralong-lifetime batteries. However, current solid- and liquid-state electrode materials face challenges such as rigid atomic structure collapse and uncontrolled species migration, respectively, which contradict the theoretical requirements for ultralong operation lifetimes. Herein, we present a design concept for a soft colloid polyvinylpyrrolidone iodine (PVP-I) electrode, leveraging the inherent water molecule competition effect between (SO) from the electrolyte and PVP-I from the cathode in an aqueous Zn||PVP-I battery. Electrochemical demonstrations measured under various simulated and practical (integrated with photovoltaic solar panel) conditions highlight the potential for an ultralong battery lifetime. The PVP-I colloid exhibits a dynamic response to the electric field during battery operation. More importantly, the water competition effect between (SO) from the electrolyte and water-soluble polymer cathode materials establishes a new electrolyte/cathode interfacial design platform for advancing ultralong-lifetime aqueous batteries.

Bibliographic Details

Zhang, Kaiqiang; Wu, Chao; Yan, Shiye; Ma, Changlong; Wang, Luoya; Kong, Pei; Zhuang, Kun; Fan, Pengcheng; Ye, Jilei; Wu, Yuping

American Chemical Society (ACS)

Chemical Engineering; Chemistry; Biochemistry, Genetics and Molecular Biology

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