Energetic and durable all-polymer aqueous battery for sustainable, flexible power

Yang Hong, Kangkang Jia, Yueyu Zhang, Ziyuan Li, Junlin Jia, Jing Chen, Qimin Liang, Huarui Sun, Qiang Gao, Dong Zhou, Ruhong Li, Xiaoli Dong, Xiulin Fan () and Sisi He ()
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Yang Hong: Harbin Institute of Technology (Shenzhen)
Kangkang Jia: Harbin Institute of Technology (Shenzhen)
Yueyu Zhang: Wenzhou Institute University of Chinese Academy of Sciences
Ziyuan Li: Ningbo University
Junlin Jia: East China University of Science and Technology
Jing Chen: Yangzhou University
Qimin Liang: Harbin Institute of Technology (Shenzhen)
Huarui Sun: Harbin Institute of Technology (Shenzhen)
Qiang Gao: Yangzhou University
Dong Zhou: Tsinghua University
Ruhong Li: Zhejiang University
Xiaoli Dong: Fudan University
Xiulin Fan: Zhejiang University
Sisi He: Harbin Institute of Technology (Shenzhen)

Nature Communications, 2024, vol. 15, issue 1, 1-13

Abstract: Abstract All-polymer aqueous batteries, featuring electrodes and electrolytes made entirely from polymers, advance wearable electronics through their processing ease, inherent safety, and sustainability. Challenges persist with the instability of polymer electrode redox products in aqueous environments, which fail to achieve high performance in all-polymer aqueous batteries. Here, we report a polymer-aqueous electrolyte designed to stabilize polymer electrode redox products by modulating the solvation layers and forming a solid-electrolyte interphase. Polyaniline is selected as an example for its dual functionality as a cathode or anode working by p/n doping mechanisms. This approach pioneers the application of polyaniline as an anode and enhances the high-voltage stability of polyaniline cathode in an aqueous electrolyte. The resulting all-polymer aqueous sodium-ion battery with polyaniline as symmetric electrodes exhibits a high capacity of 139 mAh/g, energy density of 153 Wh/kg, and a retention of over 92% after 4800 cycles. Spectroscopic characterizations have elucidated the hydration structure, solid-electrolyte interphase, and dual-ion doping mechanism. Large-scale all-polymer flexible batteries are fabricated with excellent flexibility and recyclability, heralding a paradigmatic approach to sustainable, wearable energy storage.

Date: 2024
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DOI: 10.1038/s41467-024-53804-2

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