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Ultra‐Fast Microwave Synthesis of 3D Flower‐Like Co 9 S 8 Hierarchical Architectures for High‐Performance Supercapacitor Applications
Author(s) -
Yin Li,
Wang Longqiang,
Liu Xiaohong,
Gai Yansong,
Su Linghao,
Qu Baohan,
Gong Liangyu
Publication year - 2015
Publication title -
european journal of inorganic chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.667
H-Index - 136
eISSN - 1099-0682
pISSN - 1434-1948
DOI - 10.1002/ejic.201500120
Subject(s) - supercapacitor , chemistry , microwave , capacitance , current density , electrode , microwave irradiation , nanotechnology , optoelectronics , analytical chemistry (journal) , materials science , organic chemistry , catalysis , telecommunications , physics , quantum mechanics , computer science
Ultra‐fast microwave irradiation is used to synthesize 3D flower‐like Co 9 S 8 hierarchical architectures. Based on time‐dependent SEM observations, a multistep splitting–growth mechanism is proposed to understand the formation of the observed structures. Moreover, the materials were used as electrodes to fabricate supercapacitors with high specific capacitances of 522, 499, 441, 436, and 397 F g –1 at current densities of 0.5, 0.8,1.0, 1.5, and 2.0 A g –1 , respectively. The devices also show high charge–discharge reversibility, with an efficiency of 97.7 % after cycling 1000 times at a current density of 1.0 A g –1 .