Stretchable hydrogel electrolyte films based on moisture Self-absorption for flexible Quasi-solid-state batteries

被引：12

作者：

Li, Xin ^{[1
]}

Zeng, Shuaibo ^{[1
,2
]}

Li, Wentao ^{[1
]}

Lin, Huijuan ^{[1
]}

Zhong, Hai ^{[1
]}

Zhu, Hongbing ^{[1
]}

Mai, Yaohua ^{[1
]}

机构：

[1] Jinan Univ, Coll Informat Sci & Technol, Inst New Energy Technol, Guangzhou 510632, Peoples R China

[2] Guangdong Polytech Normal Univ, China Sch Automot & Transportat Engn, Guangzhou 510632, Peoples R China

来源：

CHEMICAL ENGINEERING JOURNAL | 2022年 / 439卷

关键词：

Stretchable hydrogel film; Lean aqueous electrolyte; Self-healing; Cycling stability; Flexible solid batteries; LITHIUM-ION BATTERIES; FLEXIBILITY;

D O I：

10.1016/j.cej.2022.135741

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Flexible rechargeable batteries are urgently needed because of the rapid development of wearable electronics. However, most lithium-ion batteries fail to meet safety and stretchability requirements, which are critical factors to the practical application of such devices. Herein, a freestanding, stretchable, and self-healing polymer film that acts as a hydrogel electrolyte is developed for the preparation of flexible rechargeable batteries. The electrolyte film exhibits a high ionic conductivity of 1.15 mS cm(-1) at room temperature with a lean water content (4.62%). It also displays a wide electrochemical stability window of similar to 2.2 V and a high stretchable ratio of > 300%. A stretchable full battery is then developed using the hydrogel electrolyte film. The full cell exhibits long cyclic stability with 73.2% capacity retention after 1,000 cycles at the current density of 1 A g(-1). Furthermore, the open circuit voltage of the full cell is maintained well when it is stretched by 50%-125% and even after cutting the cell. This study offers a strategy for designing high-performance hydrogel electrolytes, which have potential applications in wearable electronics.

引用

页数：8