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祝江赛,朱墨,王志坤,胡庆丰,王晗,王志峰,秦春玲.三明治型纳米多孔镍/氧化镍电极材料的制备及储能特性[J].稀有金属材料与工程(英文),2018,47(12):3872~3879.[Zhu Jiangsai,Zhu Mo,Wang Zhikun,Hu Qingfeng,Wang Han,Wang Zhifeng and Qin Chunling.Fabrication and Electrochemical Properties of Sandwich-Type Nanoporous Nickel/Nickel Oxide Composite Electrodes[J].Rare Metal Materials and Engineering,2018,47(12):3872~3879.]
Fabrication and Electrochemical Properties of Sandwich-Type Nanoporous Nickel/Nickel Oxide Composite Electrodes
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Received:April 10, 2017  Revised:September 14, 2017
DOI:
Key words: Ni-based amorphous alloy  dealloying  nanoporous nickel/nikel oxide  sandwich-type structure  specific capacitors
Foundation item:国家自然科学基金(项目号51671077),河北省自然科学基金(E2016202212,E2015202081),河北省百人计划(E2012100009),研究生创新项目(220056)
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Zhu Jiangsai,Zhu Mo,Wang Zhikun,Hu Qingfeng,Wang Han,Wang Zhifeng and Qin Chunling  
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Abstract:
      Nanoporous Nickel/Nickel Oxide (np-Ni/NiO) composite electrodes were fabricated with a “free dealloying - natural oxidation” method by dealloying a high ductile amorphous Ni40Ti60 precursor alloy in 0.25 M HF solution. The structure, morphologies and electrochemical properties of the composite electrodes were studied by XRD, SEM and Electrochemical measurements. The results indicate that the np-Ni/NiO composites exhibit a sandwich-type structure with "dealloyed layer︱amorphous alloy core︱dealloyed layer ". Due to the good connection between layers, the electrode material performs an excellent flexibility and structural integration. The thickness of the dealloyed layer and the content of NiO increase with extending the dealloying time. The volume capacitance of np-Ni/NiO by dealloying Ni40Ti60 ribbons in 0.25 M HF for 2 h can reach to 491.1 F/cm3 at a discharge current density of 0.5 A/cm3. After 6000 cycles, the volume capacitance remains at 472 F/cm3, indicating an excellent cycle stability of np-Ni/NiO composite electrodes.