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Facile Synthesis of A 3D Flower‐Like Mesoporous Ni@C Composite Material for High‐Energy Aqueous Asymmetric Supercapacitors
Author(s) -
Liu Song,
An Cuihua,
Zang Lei,
Chang Xiaoya,
Guo Huinan,
Jiao Lifang,
Wang Yijing
Publication year - 2018
Publication title -
chemistry – an asian journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.18
H-Index - 106
eISSN - 1861-471X
pISSN - 1861-4728
DOI - 10.1002/asia.201800056
Subject(s) - supercapacitor , materials science , composite number , mesoporous material , calcination , anode , aqueous solution , chemical engineering , electrochemistry , carbon fibers , power density , cathode , nanoparticle , specific surface area , nanotechnology , composite material , electrode , catalysis , chemistry , organic chemistry , power (physics) , physics , quantum mechanics , engineering
A 3D flower‐like mesoporous Ni@C composite material has been synthesized by using a facile and economical one‐pot hydrothermal method. This unique 3D flower‐like Ni@C composite, which exhibited a high surface area (522.4 m 2 g −1 ), consisted of highly dispersed Ni nanoparticles on mesoporous carbon flakes. The effect of calcination temperature on the electrochemical performance of the Ni@C composite was systematically investigated. The optimized material (Ni@C 700) displayed high specific capacity (1306 F g −1 at 2 A g −1 ) and excellent cycling performance (96.7 % retention after 5000 cycles). Furthermore, an asymmetric supercapacitor (ASC) that contained Ni@C 700 as cathode and mesoporous carbon (MC) as anode demonstrated high energy density (60.4 W h kg −1 at a power density of 750 W kg −1 ).
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