Fabrication of ultrathin CoMoO4 nanosheets modified with chitosan and their improved performance in energy storage device

被引:125
|
作者
Ramkumar, Ramya [1 ]
Minakshi, Manickam [1 ]
机构
[1] Murdoch Univ, Sch Engn & Informat Technol, Energy, Murdoch, WA 6150, Australia
基金
澳大利亚研究理事会;
关键词
MICROWAVE-ASSISTED SYNTHESIS; CROSS-LINKED CHITOSAN; ELECTROCHEMICAL PROPERTIES; METAL; ELECTROCATALYSTS; HETEROSTRUCTURES; NANOCOMPOSITES; MOLYBDATES; NANORODS; IONS;
D O I
10.1039/c5dt00622h
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Ultrathin nanosheet-assembled cobalt molybdate (CoMoO4) with a mesoporous morphology was synthesized by a urea-assisted solution combustion route at a temperature of 400 degrees C. The as-prepared CoMoO4 was modified using chitosan cross-linked with glutaraldehyde (glu) and employed as a cathode material in an aqueous hybrid capacitor. The physical and electrochemical behaviour of CoMoO4 modified with chitosan and the as-prepared (chitosan free) CoMoO4 has been compared and discussed. The modified CoMoO4 exhibited excellent electrochemical performance with a specific capacitance of 135 F g(-1) at 0.6 A g(-1) and an energy density of 31 W h kg(-1). It also exhibited good cycling stability with high coulombic efficiency over 2000 cycles retaining a specific capacitance of 81 F g(-1) at 3 A g(-1), comparatively much better than that of nanostructured chitosan free CoMoO4 which yielded 17 F g(-1). The results indicated that chitosan gel strongly adheres to the molybdate moiety of CoMoO4 and increases the capacitance four-fold compared to a chitosan free material. The modified CoMoO4 electrode shows potential for high performance, and is an environmentally friendly and low-cost energy storage device.
引用
收藏
页码:6158 / 6168
页数:11
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