Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 11, Issue 43, Pages 40481-40489Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.9b13417
Keywords
microsupercapacitor; CVD; carbon; 3-D network; energy storage; nanowire
Funding
- Singapore Ministry of Education Academic Research Fund Tier 1 [2018-T1-005-001, 2017-T1-002-096 (RG 182/17)]
- MOE, Singapore [2018-T2-2-005, 2016-T1-001-197, RG102/16]
- National Natural Science Foundation of China [11704071]
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In this work, the performance of a novel three-dimensional carbon-based planar microsupercapacitor (MSC) electrode structure is investigated. An in situ template-free fabrication of the Cu nanowire network structure acting as the current collector is first prepared through a chemical oxidation phase of sputtered Cu films, followed by a thermal reduction phase. Carbon is subsequently grown over the Cu nanostructure. In a two-electrode electrochemical test, the patterned interdigitated carbon/Cu nanowire network device exhibits an excellent maximum areal and volumetric capacitance of 1.45 and 7.43 mF cm(-3), respectively, while retaining 94.2% of its capacitance after 10 000 charge-discharge cycles. This relatively simple foundry-compatible fabrication process provides an excellent method in which planar MSCs can be patterned and fabricated for energy storage solutions in microelectronics.
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