A Polarized Gel Electrolyte for Wide‐Temperature Flexible Zinc‐Air Batteries

Author:

Jiao Miaolun1ORCID,Dai Lixin1,Ren Hong‐Rui12,Zhang Mengtian1,Xiao Xiao1,Wang Boran1,Yang Jinlong2,Liu Bilu1,Zhou Guangmin1ORCID,Cheng Hui‐Ming34

Affiliation:

1. Tsinghua Shenzhen International Graduate School Tsinghua University Shenzhen 518055 China

2. College of Materials Science and Engineering Shenzhen University Shenzhen 518060 China

3. Shenyang National Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

4. Institute of Technology for Carbon Neutrality Faculty of Materials Science and Energy Engineering Shenzhen Institute of Advanced Technology Chinese Academy of Sciences Shenzhen 518055 China

Abstract

AbstractThe development of flexible zinc‐air batteries (FZABs) has attracted broad attention in the field of wearable electronic devices. Gel electrolyte is one of the most important components in FZABs, which is urgent to be optimized to match with Zn anode and adapt to severe climates. In this work, a polarized gel electrolyte of polyacrylamide‐sodium citric (PAM‐SC) is designed for FZABs, in which the SC molecules contain large amount of polarized −COOfunctional groups. The polarized −COOgroups can form an electrical field between gel electrolyte and Zn anode to suppress Zn dendrite growth. Besides, the −COOgroups in PAM‐SC can fix H2O molecules, which prevents water from freezing and evaporating. The polarized PAM‐SC hydrogel delivers a high ionic conductivity of 324.68 mS cm−1and water retention of 96.85 % after being exposed for 96 h. FZABs with the PAM‐SC gel electrolyte exhibit long cycling life of 700 cycles at −40 °C, showing the application prospect under extreme conditions.

Funder

National Key Research and Development Program of China

China Postdoctoral Science Foundation

National Natural Science Foundation of China

Guangdong Province Introduction of Innovative R&D Team

Publisher

Wiley

Subject

General Chemistry,Catalysis

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