期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 57, 期 31, 页码 9810-9813出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201805618
关键词
batteries; electrolytes; ferric ions; hydrogels; sodium polyacrylate
资金
- Harbin Institute of Technology, Shenzhen [DD45001015]
Self-healing solid-state aqueous rechargeable NiCo vertical bar vertical bar Zn batteries are inherently safe and have a high energy density and mechanical robustness. However, the self-healability of solid-state batteries has only been realized by a few studies in which electron/ion-inactive self-healable substrates are utilized. This arises from the lack of self-healable electrolytes. Now an intrinsically self-healing battery has been designed that utilizes a new electrolyte that is intrinsically self-healable. Sodium polyacrylate hydrogel chains are crosslinked by ferric ions to promote dynamic reconstruction of an integral network. These non-covalent crosslinkers can form ionic bonds to reconnect damaged surfaces when the hydrogel is cut off, providing an ultimate solution to the intrinsic self-healability problem of batteries. As a result, this NiCo vertical bar vertical bar Zn battery with this hydrogel electrolyte can be autonomically self-healed with over 87% of capacity retained after 4 cycles of breaking/healing.
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