He W, Li X, An S, Li T, Zhang Y, Cui J. 3D β-Ni(OH)
2 nanowires/RGO composite prepared by phase transformation method for superior electrochemical performance.
Sci Rep 2019;
9:10838. [PMID:
31346201 PMCID:
PMC6658499 DOI:
10.1038/s41598-019-47120-9]
[Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2019] [Accepted: 07/10/2019] [Indexed: 11/09/2022] Open
Abstract
In order to improve the capacity and rate performance of nickel-metal hydride (Ni-MH) batteries, we proposed a simple phase transformation method to synthesis 3D β-nickel hydroxide nanowires/reduced graphene oxide (β-Ni(OH)2 NWs/RGO) composite. β-Ni(OH)2 nanowires with diameters of 20-30 nm and lengths up to several micrometers were decorated on RGO layers, forming 3D network structure. The 3D β-Ni(OH)2 NWs/RGO composite displayed a discharge capacity of 343.2 mAh/g at 0.2C, and the capacity values has almost no loss after 100th cycles. When the discharge rate was at 5C, the capacity reached a value of 272.7 mAh/g, and its capacity retention was 79.5%. It showed good capacity and rate performance as a positive material for Ni-MH batteries.
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