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

被引:65
|
作者
Jiao, Miaolun [1 ]
Dai, Lixin [1 ]
Ren, Hong-Rui [1 ,2 ]
Zhang, Mengtian [1 ]
Xiao, Xiao [1 ]
Wang, Boran [1 ]
Yang, Jinlong [2 ]
Liu, Bilu [1 ]
Zhou, Guangmin [1 ]
Cheng, Hui-Ming [3 ,4 ]
机构
[1] Tsinghua Univ, Tsinghua Shenzhen Int Grad Sch, Shenzhen 518055, Peoples R China
[2] Shenzhen Univ, Coll Mat Sci & Engn, Shenzhen 518060, Peoples R China
[3] Inst Met Sci & Technol, Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Shenyang 110016, Peoples R China
[4] Chinese Acad Sci, Inst Technol Carbon Neutral, Shenzhen Inst Adv Technol, Fac Mat Sci & Energy Engn, Shenzhen 518055, Peoples R China
基金
中国博士后科学基金; 中国国家自然科学基金;
关键词
Flexible Zinc-Air Batteries; High Ionic Conductivity; Polarized Gel Electrolyte; Wide Operating Temperature; Zn Dendrite Free;
D O I
10.1002/anie.202301114
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
The 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 -COO- functional groups. The polarized -COO- groups can form an electrical field between gel electrolyte and Zn anode to suppress Zn dendrite growth. Besides, the -COO- groups 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(-1) and 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 degrees C, showing the application prospect under extreme conditions.
引用
收藏
页数:10
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