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电沉积合成镍/氢氧化镍/聚苯胺薄膜及其电容特性

Electrodeposition synthesis of Ni/Ni(OH)2/PANI composites film and electrochemical properties

    摘要
  • 摘要: 采用电沉积法合成以铜箔为基底的Ni/Ni(OH)2/PANI复合电极材料。首先通过电沉积法将Ni/Ni(OH)2纳米层沉积于铜箔表面，然后通过电化学聚合法在三电极体系下在其表面沉积一层聚苯胺薄片。采用SEM、TEM、FT-IR、XPS、CV、GCD和EIS对Ni/Ni(OH)2/PANI的形貌、结构以及电化学性能进行了研究。结果表明，Ni/Ni(OH)2/PANI具有较高的比电容和优异的循环性能。Ni/Ni(OH)2/PANI在1 A/g电流密度时具有1 400 F/g的比电容，当电流密度从1 A/g增加到10 A/g时，其容量保持率为62.7%，表现出良好的倍率性能，并且在10 A/g的高电流密度下循环2 000次后其容量保持率为76%。聚苯胺薄片沉积在Ni/Ni(OH)2基体表面可以降低电极表面的电荷转移阻抗，同时起到保护电极的作用，使复合电极的电化学循环性能得到改善。

     

    Abstract: In this paper, Ni/Ni(OH)2/PANI electrode materials were synthesized on Cu foil substrates by the electrodeposition method. The Ni/Ni(OH)2 nanolayer was firstly prepared on the Cu foil surface by the electrodeposition method, then the PANI layer was deposited on the Ni/Ni(OH)2 surface via the electrochemical polymerization method. The morphology, structure and electrochemical properties of Ni/Ni(OH)2/PANI were investigated by SEM, TEM, FT-IR, XPS, CV, GCD and EIS. The results showed that the Ni/Ni(OH)2/PANI electrode materials had a high specific capacitance and excellent cycle performance. The Ni/Ni(OH)2/PANI electrode materials had an outstanding specific capacitance of 1 400 F/g at 1 A/g, excellent rate capability with a capacitance retention rate of 62.7% from 1 to 10 A/g and good cycling stability with a capacitance retention rate of 76% after 2 000 cycles. PANI layer deposited on Ni/Ni(OH)2 surface could reduce the charge transfer impedance of the electrode surface and protect the electrode, thus improving the electrochemical cycle performance of the electrode.

     

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