A biocompatible electrolyte enables highly reversible Zn anode for zinc ion battery

Guanjie Li, Zihan Zhao, Shilin Zhang (), Liang Sun, Mingnan Li, Jodie A. Yuwono, Jianfeng Mao, Junnan Hao, Jitraporn (Pimm) Vongsvivut, Lidan Xing, Chun-Xia Zhao and Zaiping Guo ()
Additional contact information
Guanjie Li: The University of Adelaide
Zihan Zhao: The University of Adelaide
Shilin Zhang: The University of Adelaide
Liang Sun: The University of Adelaide
Mingnan Li: The University of Adelaide
Jodie A. Yuwono: The University of Adelaide
Jianfeng Mao: The University of Adelaide
Junnan Hao: The University of Adelaide
Jitraporn (Pimm) Vongsvivut: ANSTO‒Australian Synchrotron
Lidan Xing: South China Normal University
Chun-Xia Zhao: The University of Adelaide
Zaiping Guo: The University of Adelaide

Nature Communications, 2023, vol. 14, issue 1, 1-14

Abstract: Abstract Progress towards the integration of technology into living organisms requires power devices that are biocompatible and mechanically flexible. Aqueous zinc ion batteries that use hydrogel biomaterials as electrolytes have emerged as a potential solution that operates within biological constraints; however, most of these batteries feature inferior electrochemical properties. Here, we propose a biocompatible hydrogel electrolyte by utilising hyaluronic acid, which contains ample hydrophilic functional groups. The gel-based electrolyte offers excellent anti-corrosion ability for zinc anodes and regulates zinc nucleation/growth. Also, the gel electrolyte provides high battery performance, including a 99.71% Coulombic efficiency, over 5500 hours of long-term stability, improved cycle life of 250 hours under a high zinc utilization rate of 80%, and high biocompatibility. Importantly, the Zn//LiMn2O4 pouch cell exhibits 82% capacity retention after 1000 cycles at 3 C. This work presents a promising gel chemistry that controls zinc behaviour, offering great potential in biocompatible energy-related applications and beyond.

Date: 2023
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DOI: 10.1038/s41467-023-42333-z

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