期刊
CHEMSUSCHEM
卷 11, 期 11, 页码 1849-1856出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/cssc.201800426
关键词
electrochemistry; electrolytes; graphene; portable electronics; supercapacitors
资金
- MINECO [MAT2015-68394-R, MAT2017-87202-P MINECO/FEDER]
- Severo Ochoa program of the Spanish Ministry of Economy, Industry, and Competitiveness (MINECO) [SEV-2013-0295]
- CERCA program/Generalitat de Catalunya
Inspired by future needs of flexible, simple, and low-cost energy storage devices, smart graphene-based micro-supercapacitors on conventional Xerox paper substrates were developed. The use of redox-active species (iodine redox couple) was explored to further improve the paper device's performance. The device based on printed graphene paper itself already had a remarkable maximum volumetric capacitance of 29.6 mFcm(-3) (volume of whole device) at 6.5 mA cm(-3). The performance of the hybrid electrode with redox-active potassium iodide at the graphene surface was tested. Remarkably, the hybrid device showed improved volumetric capacitance of 130 mF cm(-3). The maximum energy density for a graphene + KI device in H2SO4 electrolyte was estimated to be 0.026 mWh cm(-3). Thus, this work offers a new simple, and lightweight micro-supercapacitor based on low-cost printed graphene paper, which will have great applications in portable electronics.
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