期刊
COMPOSITES PART B-ENGINEERING
卷 224, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesb.2021.109228
关键词
Stretchable zinc-air battery; Hydrogel electrolyte; Double-network; Freezing-tolerance
资金
- Natural Science Foundation of Jiangsu Province [BK20180628]
- National Natural Science Foundation of China [51803078]
- Postgraduate Research & Practice Innovation Program of Jiangsu Province [KYCX20-1787]
A sodium polyacrylate-starch double-network hydrogel was prepared for the flexible zinc-air battery, showing outstanding mechanical strength and conductivity, with high energy efficiency, energy density, and reliability.
With the advancement of wearable electronic devices, it is critical to create a flexible power source that is high performing, cost effective, and safe. The flexible zinc-air battery as a promising candidate has been widely concerned, while most hydrogel electrolytes lose their stretchability in a strong alkaline environment. Herein, a sodium polyacrylate-starch double-network hydrogel is prepared by simple solution copolymerization and swelling techniques. Not only does the hydrogel exhibit exceptional mechanical strength, toughness, and ionic conductivity, but it also exhibits an exceptional freezing-tolerance capability. The stretchable zinc-air battery with sandwich construction has a high energy efficiency of 68%, a high energy density of 67.5 mW cm-2, and a high degree of dependability in stretched modes. Additionally, the battery performs well mechanically and electrochemically at a cold environment (-20 degrees C). The batteries can be incorporated into a range of energyconsuming gadgets, suggesting that they are very practicable as wearable power sources.
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