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Enhancing Rate Performances of Carbon Based Supercapacitors
Author(s) -
Mao Zhan Xin,
Zhang Wenjing,
Wang Min Jie,
Peng Lishan,
Hong Wei,
Deng Jianghai,
Li Jing,
Wei Zidong
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901196
Subject(s) - supercapacitor , heteroatom , capacitance , carbon fibers , materials science , nanotechnology , process (computing) , surface (topology) , process engineering , chemical engineering , environmental science , computer science , composite material , chemistry , engineering , mathematics , electrode , organic chemistry , composite number , ring (chemistry) , geometry , operating system
Although continuously increased capacitance records have been reported, the rate performance of carbon based supercapacitors is still short of expectation. We herein present a facile but general surface engineering route, which is able to remarkably increase the rate capability by 26% on average, particularly for various carbon based materials. The adopted HNO 3 ‐H 2 O 2 acid treatment process introduces copious heteroatoms and transfers the surface to be superhydrophilic, which largely improve the accessible interior surface areas for higher capacitances under high current densities, thus producing better rate performances.