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Nickel Cobaltite Nanosheets Strongly Anchored on Boron and Nitrogen Co-Doped Graphene for High-Performance Asymmetric Supercapacitors

Nickel Cobaltite Nanosheets Strongly Anchored on Boron and Nitrogen Co-Doped Graphene for High-Performance Asymmetric Supercapacitors

Xinyan Jiao, Xifeng Xia, Peng Liu, Wu Lei, Yu Ouyang, Qingli Hao

Nanotechnology. 2017 Aug 4;28(31):315403.

PMID: 28635618

Abstract:

Strongly coupled boron and nitrogen co-doped graphene (BN-G) hybrids with nickel cobaltite (NiCo2O4) nanosheets (NCO/BN-G) were fabricated by a facile soft-chemical method for asymmetric supercapacitors with high-performance. The strong interaction between BN-G and NiCo2O4 nanosheets are explored by various techniques. The effect of heteroatom doping on electrochemical properties of the hybrids is systematically investigated. The strong synergistic effect between NiCo2O4 and BN-G leads to a specific capacitance of 106.5 mA h g-1 at the current density of 0.5 A g-1 and capacitance retention of 96.8% after 10 000 cycles at 5 A g-1, much better than those of the pure NiCo2O4 and its hybrid with N-doped graphene. Moreover, an asymmetric supercapacitor device, assembled with NCO/BN-G and activated carbon (NCO/BN-G//AC), exhibits a maximum energy density of 45.6 Wh kg-1 and an excellent cycling stability. The improved electrochemical performance of the NCO/BN-G hybrid is attributed to the good conductivity of BN-G and the synergistic effect between NiCo2O4 nanosheets and BN-G combined together through a plane-to-plane contact mode.

Chemicals Related in the Paper:

Catalog Number	Product Name	Structure	CAS Number	Price
LS76153	Boron/Nitrogen co-doped graphene			Price

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