Journal
RESEARCH ON CHEMICAL INTERMEDIATES
Volume 44, Issue 7, Pages 4503-4518Publisher
SPRINGER
DOI: 10.1007/s11164-018-3400-6
Keywords
CoNi2S4/graphene; supercapacitors; High specific capacitance; Asymmetric electrode
Categories
Funding
- National Natural Science Foundation of China [51641208, 21606151]
- Shanghai Association for Science and Technology Achievements Transformation Alliance Program [LM201680, LM201559]
- Shanghai Excellent Technology Leaders Program [17XD1424900]
- Shanghai Leading Talent Program [017]
- Science and Technology Commission of Shanghai Municipality Project [14520503200, ZX2016-7]
- Collaborative Innovation Fund of SIT [XTCX2015-9]
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CoNi2S4/graphene nanocomposites were synthesized by a simple solvothermal method and used as supercapacitor electrodes. CoNi2S4 nanoparticles were doped in graphene layers, which is favorable for improving electrochemical performances of the as-prepared materials. The resulting electrochemical performance of CoNi2S4/graphene nanocomposite electrodes possessed pseudocapacitive behavior with high specific capacitance (1621 F g(-1) at 0.5 A g(-1)), good rate capability (76.7% capacitance retention when reaching 10 A g(-1)) and outstanding cycling stability (no capacitance loss after 2500 charge-discharge cycles at 5 A g(-1)). In addition, as the positive electrode of an asymmetric supercapacitor, the material also shows a high specific capacitance of 126.6 F g(-1) at 0.5 A g(-1), good cycle stability with capacitance retention of 87.4% after 5000 cycles and the highest energy density of 39.56 W h kg(-1) at the power density of 374.8 W kg(-1).
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