Fabrication and supercapacitor behavior of phosphomolybdic acid/polyaniline/titanium nitride core-shell nanowire array

被引:54
作者
Lu, Lu [1 ]
Xie, Yibing [1 ]
机构
[1] Southeast Univ, Sch Chem & Chem Engn, Nanjing 211189, Jiangsu, Peoples R China
基金
中国国家自然科学基金;
关键词
ELECTROCHEMICAL SUPERCAPACITORS; CAPACITANCE PERFORMANCE; HYBRID MATERIALS; ENERGY-STORAGE; POLYANILINE; NANOPARTICLES; GRAPHENE; STATE; PANI; NANOCOMPOSITE;
D O I
10.1039/c6nj02368a
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Phosphomolybdic acid (PMo12) with reversible electron shuttling is a potential electrode material. Possessing good solubility limits its applications in energy storage. A novel and efficient phosphomolybdic acid/polyaniline/titanium nitride core-shell nanowire array (PMo12/PANI/TiN NWA) was synthesized as a supercapacitor electrode. FT-IR and Raman spectra showed that PMo12 was well incorporated into PANI and the structures of PANI and PMo12 were completely retained. PMo12/PANI/TiN NWA displayed core-shell nanowire array morphology with narrow diameters and oriented perpendicular to the substrate, benefiting ion diffusion and electron transportation. The PMo12/PANI/TiN NWA electrode exhibited a higher specific capacitance of 469 F g(-1) at 1 A g(-1) compared with PANI/TiN NWA electrode. PMo12/PANI/TiN supercapacitor could achieve a specific capacitance of 69 F g(-1) and an energy density of 21.6 W h kg(-1) at a current density of 0.5 A g(-1) and an output voltage of 1.5 V. The effects of PMo12 incorporated in PANI and the immobilization mechanism of PMo12 are proposed and discussed.
引用
收藏
页码:335 / 346
页数:12
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