Antifreezing Zwitterionic-Based Hydrogel Electrolyte for Aqueous Zn Ion Batteries

被引:55
作者
Yuan, Chunmei [1 ,2 ]
Zhong, Xin [1 ,2 ]
Tian, Peishu [1 ,2 ]
Wang, Zhe [3 ]
Gao, Guanghui [1 ,2 ]
Duan, Lianfeng [4 ]
Wang, Chunsheng [5 ]
Shi, Fengwei [1 ,2 ,3 ]
机构
[1] Changchun Univ Technol, Adv Inst Mat Sci, Changchun 130012, Peoples R China
[2] Changchun Univ Technol, Sch Chem Engn, Changchun 130012, Peoples R China
[3] Key Lab Adv Funct Polymer Membrane Mat Jilin Prov, Changchun 130012, Peoples R China
[4] Shantou Univ, Dept Chem, Shantou 515063, Peoples R China
[5] Univ Maryland, Dept Chem & Biomol Engn, College Pk, MD 20783 USA
基金
中国国家自然科学基金;
关键词
antifreezing hydrogel; electrolyte; zwitterion; aqueous battery; sodium alginate; SODIUM ALGINATE; CATHODE MATERIAL; CROSS-LINKING; HIGH-CAPACITY; ZINC; BIOPOLYMER;
D O I
10.1021/acsaem.2c01008
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
Hydrogel electrolytes have attracted great attention because the properties of integrated conductivity and mechanical flexibility endow them with potential applications in flexible solid-state batteries. However, hydrogels are easy to freeze when the temperature drops below zero, resulting in the reduction of ionic conductivity and mechanical strength of hydrogels. Herein, an antifreezing polymer hydrogel electrolyte was developed by introducing a zwitterionic group and salt into the double-network polymer. The polymer hydrogel electrolyte possessed a perfect ionic conductivity of 10.38 mS cm(-1) at -20 degrees C and could remain unfrozen until -50 degrees C. A flexible solid-state Zn//LiFePO4 battery assembled with the prepared hydrogel electrolyte exhibited a discharge capacity of 126.1 and 75.1 mAh g(-1 )at 20 and -20 degrees C at 1 C, respectively. In addition, it showed quite perfect cycling performance and maintained a capacity retention of 72.6% after 1000 cycles with a favorable Coulombic efficiency (similar to 100%) at -20 degrees C at 1 C. The hydrogel electrolyte with perfect antifreezing performance is supposed to broaden the range of working temperature and practical applications of the zinc ion battery.
引用
收藏
页码:7530 / 7537
页数:8
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