期刊
JOURNAL OF COLLOID AND INTERFACE SCIENCE
卷 511, 期 -, 页码 434-439出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.jcis.2017.10.031
关键词
Reduced graphene oxide; 1D Mn3O4; Nanohybrid; Supercapacitor
资金
- National Natural Science Foundation of China [21303080, 21461018]
- Program for Young Talents of Science and Technology in Universities of Inner Mongolia Autonomous Region [NJYT-15-B14]
- Program for the Top Young Innovative Talents of Inner Mongolia Autonomous Region
- Inner Mongolia Key Lab of Carbon Nanomaterials [MDK2017023, MDK2017026]
- Inner Mongolia Autonomous Region Incentive Funding Guided Project for Science & Technology Innovation
- Inner Mongolia Natural Science Foundation-China [2017MS0222]
Nanostructure Mn3O4 is a promising pseudocapacitive electrode material due to its low cost, environmental compatibility, and intrinsically high capacity. However, the poor electrical conductivity and low accessible active sites limit its performance. We report that one-dimensional (1D) nanoscale Mn3O4 has been coupled with reduced graphene oxide (RGO) to fabricate RGO/Mn3O4 nanohybrid (MORGO) as a pseudocapacitive electrode material with high capacitance. The selective reduction of graphene oxide (GO) in Mn3O4/graphene oxide (MOGO) to reduced graphene oxide (RGO) while sustaining the unchanged oxidation state of manganese is the key to obtain MORGO. Specific surface area of MORGO is 14 times higher than pure Mn3O4, and the charge transfer resistance decreases 3.2 times. These enhanced properties lead to excellent specific capacitance of 538 F g(-1) at the current density of 0.1 A g(-1), and of 472 F g(-1) at 10 A g(-1) in 1 M Na2SO4 aqueous electrolyte. The capacitance retained 89% after 2000 cycles, demonstrating its excellent long-term cycling stability. (C) 2017 Elsevier Inc. All rights reserved.
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