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B-Doped g-C3N4 Quantum Dots-Modified Ni(OH)2 Nanoflowers as an Efficient and Stable Electrode for Supercapacitors

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Abstract
For increasing the specific capacitance of supercapacitors, boron-doped g-C3N4 quantum dots (B-CNQDs) were synthesized by KOH cutting and further adsorbed on the surface of Ni(OH)2 nanoflowers (B-CNQDx-Ni) by a mild impregnation method via electrostatic force. The B-CNQDx-Ni nanocomposites exhibit an increased surface area and reduced band gap energy compared with pure Ni(OH)2, which result in a larger contact area between the electrode and the electrolyte and enhanced charge-transfer kinetics. The best B-CNQDx-Ni sample has an excellent specific capacitance of 1700 F/g at 1.5 A/g, low impedance at the alkaline conduction of 7.421 Ω, and a high stability cycling performance of 82% capacity retention after 5000 cycles, suggesting that B-CNQDx-Ni is a type of suitable electrode material used in supercapacitors.
Author(s)
홍의문Jingxia Yang최원묵Jinjie WangJingli Xu
Issued Date
2021
Type
Article
Keyword
graphene
DOI
10.1021/acsaem.0c02680
URI
https://oak.ulsan.ac.kr/handle/2021.oak/9232
https://ulsan-primo.hosted.exlibrisgroup.com/primo-explore/fulldisplay?docid=TN_cdi_crossref_primary_10_1021_acsaem_0c02680&context=PC&vid=ULSAN&lang=ko_KR&search_scope=default_scope&adaptor=primo_central_multiple_fe&tab=default_tab&query=any,contains,B-Doped%20g-C3N4%20Quantum%20Dots-Modified%20Ni(OH)2%20Nanoflowers%20as%20an%20Efficient%20and%20Stable%20Electrode%20for%20Supercapacitors&offset=0&pcAvailability=true
Publisher
ACS APPLIED ENERGY MATERIALS
Location
미국
Language
영어
ISSN
2574-0962
Citation Volume
4
Citation Number
2
Citation Start Page
1496
Citation End Page
1504
Appears in Collections:
Engineering > Chemical Engineering
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