Journal
NANOTECHNOLOGY
Volume 26, Issue 42, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0957-4484/26/42/425402
Keywords
on-chip energy storage; CuO; energy
Funding
- Thousand Talents Program
- Natural Science Foundation of Jiangsu Province of China [BK20140315]
- National Natural Science Foundation of China [51402202]
- National Basic Research Program of China [2015CB358600]
- JiangsuShuangchuang Planand the Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
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We introduce a new method for fabricating unique on-chip supercapacitors based on CuO/polypyrrole core/shell nanosheet arrays by means of direct electrochemical co-deposition on interdigital-like electrodes. The prepared all-solid-state device demonstrates exceptionally high specific capacitance of 1275.5 F cm(-3) (similar to 40 times larger than that of CuO-only supercapacitors) and high-energy-density of 28.35 mWh cm(-3), which are both significantly greater than other solid-state supercapacitors. More importantly, the device maintains approximately 100% capacity retention at 2.5 A cm(-3) after 3000 cycles. The in situ co-deposition of CuO/polypyrrole nanosheets on interdigital substrate enables effective charge transport, electrode fabrication integrity, and device integration. Because of their high energy, power density, and stable cycling stability, these newly developed on-chip supercapacitors permit fast, reliable applications in portable and miniaturized electronic devices.
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