Journal
MATERIALS TODAY SUSTAINABILITY
Volume 17, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.mtsust.2021.100096
Keywords
Double-layer capacitance; Flexible electronics; Energy storage device; Graphene-assembled film
Funding
- Hainan Provincial Joint Project of Sanya Yazhou Bay Science and Technology City [520LH054]
- Fundamental Research Funds for the Central Universities [WUT: 2021IVA66]
- Wuhan University of Technology Startup Fund [40120562]
- Huazhong University of Science and Technology (HUST)
- Program for HUST Academic Frontier Youth Team
- Innovation and Talent Recruitment Base of New Energy Chemistry and Device [B21003]
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This study reports a method to fabricate graphene-based planar supercapacitors using laser engraving and punching, which exhibit excellent flexibility, superior modularization, and programmable pore generation. The planar supercapacitors do not require external metal current collectors and separators, and demonstrate high specific capacitance, outstanding rate capability, and robust stability.
The design of lightweight and flexible micro-supercapacitors (MSCs) to couple with the unprecedented boom of microelectronics is extremely desirable but remains challenging. Herein, a facile and straightforward laser engraving and punching strategy has been reported to fabricate graphene-based planar MSCs with outstanding flexibility, superior modularization and programmable pore generation. The resulting planar flexible MSCs are free of external metal current collectors and separators, and exhibit high specific capacitance, outstanding rate capability and robust stability with 98.4% capacitance retention even after 25,000 cycles in the PVA/H2SO4 gel electrolyte. Notably, the output voltage and capacitance of our prepared MSCs are readily adjustable through simple serial and parallel connection, indicative of superior modularization and performance uniformity. (c) 2021 Elsevier Ltd. All rights reserved.
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