期刊
JOURNAL OF PHYSICAL CHEMISTRY C
卷 123, 期 25, 页码 15458-15466出版社
AMER CHEMICAL SOC
DOI: 10.1021/acs.jpcc.9b03628
关键词
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资金
- Polish National Science Centre [2016/21/B/ST7/01430]
- NATO Science for Peace Multi-Year Programme [G5147]
- National Centre for Research and Development Techmatstrateg [347324]
- Faculty of Electronics, Telecommunications, and Informatics of the Gdafisk University of Technology
- Methusalem NANO network
- Polish National Science Centre (NCN) [2015/17/D/ST5/02571]
Synthesis of stable hybrid carbon nanostructure for high-performance supercapacitor electrode with long life-cycle for electronic and energy storage devices is a real challenge. Here, we present a one-step synthesis method to produce conductive boron-doped hybrid carbon nanowalls (HCNWs), where sp(2)-bonded graphene has been integrated with and over a three-dimensional curved wall-like network of sp(3)-bonded diamond. The spectroscopic studies such as X-ray absorption, Raman, and X-ray photoelectrons clearly reveal the coexistence of diamond and graphene in these nanowalls, while the detailed transmission electron microscopy studies confirm the unique microstructure where a diamond nanowall is encased by a multilayered graphene. Interestingly, these HCNWs yield a high double layer capacitance value of 0.43 mF cm(-2) and electrode retention of 98% over 10 000 cycles of charging/discharging in 1 M Na2SO4 electrolyte. The remarkable supercapacitive performance can be attributed to the 3D interconnected network of diamond nanowalls surrounded by highly conducting graphene.
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