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Facile Construction of 3D Reduced Graphene Oxide Wrapped Ni 3 S 2 Nanoparticles on Ni Foam for High‐Performance Asymmetric Supercapacitor Electrodes
Author(s) -
Qi Jiqiu,
Chang Yuan,
Sui Yanwei,
He Yezeng,
Meng Qingkun,
Wei Fuxiang,
Zhao Yulong,
Jin Yunxue
Publication year - 2017
Publication title -
particle and particle systems characterization
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.877
H-Index - 56
eISSN - 1521-4117
pISSN - 0934-0866
DOI - 10.1002/ppsc.201700196
Subject(s) - supercapacitor , graphene , materials science , capacitance , electrode , composite number , nanoparticle , current density , electrochemistry , power density , oxide , chemical engineering , graphene foam , nanotechnology , composite material , graphene oxide paper , metallurgy , chemistry , power (physics) , physics , quantum mechanics , engineering
3D reduced graphene oxide (rGO)‐wrapped Ni 3 S 2 nanoparticles on Ni foam with porous structure is successfully synthesized via a facile one‐step solvothermal method. This unique structure and the positive synergistic effect between Ni 3 S 2 nanoparticles and graphene can greatly improve the electrochemical performance of the NF@rGO/Ni 3 S 2 composite. Detailed electrochemical measurements show that the NF@rGO/Ni 3 S 2 composite exhibits excellent supercapacitor performance with a high specific capacitance of 4048 mF cm −2 (816.8 F g −1 ) at a current density of 5 mA cm −2 (0.98 A g −1 ), as well as long cycling ability (93.8% capacitance retention after 6000 cycles at a current density of 25 mA cm −2 ). A novel aqueous asymmetric supercapacitor is designed using the NF@rGO/Ni 3 S 2 composite as positive electrode and nitrogen‐doped graphene as negative electrode. The assembled device displays an energy density of 32.6 W h kg −1 at a power density of 399.8 W kg −1 , and maintains 16.7 W h kg −1 at 8000.2 W kg −1 . This outstanding performance promotes the as‐prepared NF@rGO/Ni 3 S 2 composite to be ideal electrode materials for supercapacitors.