Journal
CARBOHYDRATE POLYMERS
Volume 255, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.carbpol.2020.117346
Keywords
Gel polymer electrolyte; Hydrogel; In-situ polymerization; All solid state; Supercapacitor
Categories
Funding
- National Natural Science Foundation of China [51763014, 52073133]
- Shenyang National Laboratory for Materials Science [18LHPY002]
- State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals [18LHPY002]
- Program for Hongliu Distinguished Young Scholars in Lanzhou University of Technology
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The flexible polymer hydrogel membrane prepared using a simple polymer interpenetrating technology involving covalent and non-covalent cross-linking based on polyvinyl alcohol and carboxylated chitosan shows good flexibility and high ionic conductivity. The hydrogel electrode membrane has a high area specific capacitance and the symmetric all-gel-state supercapacitor with the hydrogel membrane as the gel electrolyte exhibits a high specific capacitance, indicating promising application prospects in flexible wearable electronic devices.
Macromolecular polymer hydrogels used in flexible supercapacitors and batteries have attracted extensive attention in recent years. In this paper, we use a simple polymer interpenetrating technology involving covalent cross-linking and non-covalent cross-linking aspects based on polyvinyl alcohol and carboxylated chitosan to prepare a flexible polymer hydrogel membrane for supercapacitor. The obtained hydrogel membrane has good flexibility and high ionic conductivity of 2.561 x 10(-2) s.cm(-1). The hydrogel electrode membrane prepared by in-situ polymerization of aniline exhibits an area specific capacitance of 580 mF.cm(-2) at a current density of 0.5 mA.cm(-2). And the symmetric all-gel-state supercapacitor with hydrogel membrane as the gel electrolyte shows a high specific capacitance of 325 mF.cm(-2) at 1.0 mA.cm(-2). We believe that this hydrogel film has considerable application prospects in flexible wearable electronic devices.
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