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论文类型：期刊论文

发表时间：2018-10-15

发表刊物：Journal of Alloys and Compounds

收录刊物：SCIE

卷号：765

页面范围：396-404

ISSN号：0925-8388

关键字：Salt assisted; Solution combustion synthesis; Ni-based materials; Supercapacitor; Composite

摘要：Low cost mass production of Ni-based composites on an industrial scale with high electrochemical performance is of practical interest for supercapacitors. In this report, various Ni-based composites containing Ni-2(CO3)(OH)(2), Ni-3(NO3)(2)(OH)(4), NiC2O4 or NiO have been successfully synthesized via a one-step salt-assisted solution combustion synthesis at a temperature of 215 degrees C. The morphology and chemical composition of the as-obtained products can be controlled by monitoring the reaction parameters inclusive of the initial concentration of salt solution, and salt species. NC-1.0 composite obtained by salt-assisted solution combustion synthesis delivers higher specific capacitance (1420 F g(-1) at 1 A g(-1)), and better cycling performance (60.0% after 2000 cycles) than those of NC-0.0 (1260 F g(-1) at 1 A g(-1), 53.6% after 2000 cycles) achieved by conventional solution combustion synthesis. Hybrid supercapacitor with NC-1.0 composite as positive electrode and active carbon as negative electrode delivers high energy density (32.5 Wh kg(-1) at a power density of 310.2 W kg(-1)). The performance of the obtained Ni-based composites as supercapacitor electrodes demonstrates their potential for upcoming electronic devices. (C) 2018 Elsevier B.V. All rights reserved.