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

IF 14.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY

Journal of the American Chemical Society Pub Date : 2024-10-18 DOI:10.1021/jacs.4c09352

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

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引用次数: 0

Abstract

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 (SO₄)^2– 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 (SO₄)^2– from the electrolyte and water-soluble polymer cathode materials establishes a new electrolyte/cathode interfacial design platform for advancing ultralong-lifetime aqueous batteries.

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用于超稳定水性锌-I 电池的固有水竞争效应胶体电极

电极材料的稳定性对于下一代超长寿命电池的开发至关重要。然而，目前的固态和液态电极材料分别面临着原子结构刚性崩溃和物种迁移失控等挑战，这与超长工作寿命的理论要求相矛盾。在此，我们提出了一种软胶体聚乙烯吡咯烷酮碘（PVP-I）电极的设计理念，利用了 Zn||PVP-I 水电池中电解质中的（SO4）2- 与阴极中的 PVP-I 之间固有的水分子竞争效应。在各种模拟和实际（与光伏太阳能电池板集成）条件下测量的电化学演示凸显了超长电池寿命的潜力。在电池工作过程中，PVP-I 胶体表现出对电场的动态响应。更重要的是，电解质中的（SO4）2- 与水溶性聚合物阴极材料之间的水竞争效应建立了一个新的电解质/阴极界面设计平台，从而推动了超长寿命水性电池的发展。

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来源期刊

Journal of the American Chemical Society 化学-化学综合

CiteScore

24.40

自引率

6.00%

发文量

2398

审稿时长

1.6 months

期刊介绍： The flagship journal of the American Chemical Society, known as the Journal of the American Chemical Society (JACS), has been a prestigious publication since its establishment in 1879. It holds a preeminent position in the field of chemistry and related interdisciplinary sciences. JACS is committed to disseminating cutting-edge research papers, covering a wide range of topics, and encompasses approximately 19,000 pages of Articles, Communications, and Perspectives annually. With a weekly publication frequency, JACS plays a vital role in advancing the field of chemistry by providing essential research.