期刊
CHEMICAL ENGINEERING JOURNAL
卷 450, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2022.138311
关键词
Flexible/wearable electronics; Flexible energy storage; Elastic all-gel supercapacitors; Stretchable electrodes; Conductive polymer hydrogels
资金
- National Natural Science Foundation of China [21835003, 61904084, 91833304, 21805136]
- Natural Science Foundation of Jiangsu Province [BE2019120, BK20190737, BK20170999]
- National Key Basic Research Program of China [2017YFB0404501, 2014CB648300]
- 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
- Scientific Foundation [NY219020, 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)
- Special Fund of Jiangsu Provincial High-level Innovative and Entrepreneurial Talents Introduction Program (the first batch) in 2020 (Doctoral Aggregation Program) [CZ030SC20016]
- China Postdoctoral Science Foundation [2021M691652]
- Jiangsu Province Postdoctoral Science Foundation [2021K323C]
This study presents an effective gelation strategy for the fabrication of high-performance PEDOT:PSS hydrogels with excellent electrical conductivity, mechanical stretchability, and swelling behavior. The resulting hydrogels can be utilized as electrodes for the assembly of substrate-free, highly elastic all-gel supercapacitors with superior energy storage capacity and arbitrary deformability.
Conductive polymer hydrogels (CPHs), especially poly(3,4-ethylenedioxythiophene): poly (styrene sulfonate) (PEDOT:PSS) hydrogels, have become research hotspot because they demonstrate tremendous application potential in cutting-edge technologies such as flexible electrochemical energy storage, bioelectronics, and wearable electronics due to their unique electrical, electrochemical and mechanical properties. However, the existing gelation strategies generally fail to achieve excellent electrical and mechanical properties simultaneously in PEDOT:PSS hydrogels and limit their broad applications. Herein, an effective gelation strategy is developed to achieve a kind of free-standing PEDOT:PSS hydrogels by double-additive induced physical cross-linking. Through the interconnection and entanglement between conductive PEDOT nanofibril chains in the physical cross-linking network, the electrical, mechanical and electrochemical properties can be synergistically optimized. The resulting PEDOT:PSS hydrogels simultaneously show ultra-high electrical conductivity, excellent mechanical stretchability, high resilience, low Young's moduli, superior swelling behavior, and extrusion 3D printability, demonstrating extensive applicability. As proof of concept applications, substrate-free, highly elastic all-gel supercapacitors (SCs) have been fabricated using the resulting PEDOT:PSS hydrogels as electrodes. The SCs exhibit simple structure, facile assembly process, high specific capacitance, excellent energy storage capacity, superior cyclic stability, and arbitrary deformability, holding great promise for wearable electronics.
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