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Construction of Hierarchical Ni(OH)2@CoMoO4 Nanoflake Composite for High-Performance Supercapacitors
Xueqing Li,Shuang-Yan Lin,Mingyi Zhang,Ge Jiang,Hong Gao 성균관대학교(자연과학캠퍼스) 성균나노과학기술원 2016 NANO Vol.11 No.5
Hierarchical Ni(OH)2@CoMoO4 nanoflake composite on Ni foam was successfully constructed by electrodepositing Ni(OH)2 onto CoMoO4 nanoflake and investigated as binder-free electrodes for supercapacitor. The composite shows a large areal capacitance of 5.23 F cm-2 at current density of 8 mA cm-1, and a capacitance retention of 82.5% after 1000 cycles. The high electrochemical performances can be attributed to the hierarchical nanoflakes structure and the synergetic effect between Ni(OH)2 nanosheets and CoMoO4 nanoflakes. This work demonstrates that Ni(OH)2@CoMoO4 nanoflake composite is highly desirable for application as advanced electrochemical electrode material.
Exhaust gas based nanoarchitectonics for porous carbon materials for high-performance supercapacitor
Juan Du,Aibing Chen,Xueqing Gao,Haixia Wu 한국공업화학회 2022 Journal of Industrial and Engineering Chemistry Vol.109 No.-
Pyrolyzing carbon precursors will also lead to a large amount of exhaust gas, which is a waste ofresources and a huge pollution. Therefore, realizing the full utilization of exhaust gas from carbon precursorsis significant. Herein, cobalt (Co) modified hard templates with micropores or mesopores is used toprepare porous carbon for supercapacitors, in which Co species provide the active sites for the captureand deposition of exhaust gas derived from zeoliticimidazolate framework. Using N2 as protective andcarrier gas, the whole process can be realized in a simple tubular furnace. The obtained PC can replicatethe morphology and pore structure of the hard template with the characteristics of micropores or mesoporesrespectively. The microporous structure of PC gives it higher surface area and pore volume than PCwith mesopores, which makes it have high capacitance of 445.7 F g1 in supercapacitor.