Journal
ADVANCED FUNCTIONAL MATERIALS
Volume 31, Issue 24, Pages -Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adfm.202101303
Keywords
conductive hydrogels; electrodes; electrolytes; supercapacitors; stretchability; self‐ healing ability
Categories
Funding
- National Natural Science Foundation of China [61904084, 21835003, 91833304, 21422402, 21674050, 21805136]
- National Key Basic Research Program of China [2017YFB0404501, 2014CB648300]
- Natural Science Foundation of Jiangsu Province [BK20190737, BK20140060, BK20170999]
- Program for Jiangsu Specially-Appointed Professor [RK030STP15001]
- Six Talent Peaks Project of Jiangsu Province [TD-XCL-009]
- 333 Project of Jiangsu Province [BRA2017402]
- NUPT 1311 Project and Scientific Foundation [NY219020, NY218164, NY217169, NY219519]
- Leading Talent of Technological Innovation of National Ten-Thousands Talents Program of China
- Excellent Scientific and Technological Innovative Teams of Jiangsu Higher Education Institutions [TJ217038]
- Synergetic Innovation Center for Organic Electronics and Information Displays
- Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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Stretchable self-healing supercapacitors offer improved durability and reliability, suitable for applications in smart wearable electronics. Conductive hydrogels, as electrode and electrolyte materials, possess unique structure and properties, showing great potential for achieving stretchable self-healing supercapacitors.
Stretchable self-healing supercapacitors (SCs) can operate under extreme deformation and restore their initial properties after damage with considerably improved durability and reliability, expanding their opportunities in numerous applications, including smart wearable electronics, bioinspired devices, human-machine interactions, etc. It is challenging, however, to achieve mechanical stretchability and self-healability in energy storage technologies, wherein the key issue lies in the exploitation of ideal electrode and electrolyte materials with exceptional mechanical stretchability and self-healing ability besides conductivity. Conductive hydrogels (CHs) possess unique hierarchical porous structure, high electrical/ionic conductivity, broadly tunable physical and chemical properties through molecular design and structure regulation, holding tremendous promise for stretchable self-healing SCs. Hence, this review is innovatively constructed with a focus on stretchable and self-healing CH based electrodes and electrolytes for SCs. First, the common synthetic approaches of CHs are introduced; then the stretching and self-healing strategies involved in CHs are systematically elaborated; followed by an explanation of the conductive mechanism of CHs; then focusing on CH-based electrodes and electrolytes for stretchable self-healing SCs; subsequently, application of stretchable and self-healing SCs in wearable electronics are discussed; finally, a conclusion is drawn along with views on the challenges and future research directions regarding the field of CHs for SCs.
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