Journal
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
Volume 56, Issue 31, Pages 9141-9145Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.201705212
Keywords
compressibility; hydrogel electrolytes; intrinsic stretchability; polyacrylamide; supercapacitors
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Funding
- NSFC/RGC Joint Research Scheme [N_CityU123/15, 5151101197]
- City University of Hong Kong [PJ 7004645, 9610372]
- NSFC [51633003]
- Natural Science Foundation of Jiangxi Province of China [20171BAB206018]
- Foundation of Jiangxi Educational Committee [GJJ160286]
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Stretchability and compressibility of supercapacitors is an essential element of modern electronics, such as flexible, wearable devices. Widely used polyvinyl alcohol-based electrolytes are neither very stretchable nor compressible, which fundamentally limits the realization of supercapacitors with high stretchability and compressibility. A new electrolyte that is intrinsically super-stretchable and compressible is presented. Vinyl hybrid silica nanoparticle cross-linkers were introduced into polyacrylamide hydrogel backbones to promote dynamic cross-linking of the polymer networks. These cross-linkers serve as stress buffers to dissipate energy when strain is applied, providing a solution to the intrinsically low stretchability and compressibility shortcomings of conventional supercapacitors. The newly developed supercapacitor and electrolyte can be stretched up to an unprecedented 1000% strain with enhanced performance, and compressed to 50% strain with good retention of the initial performance.
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