Facile Synthesis of Layered Sodium Manganese Oxide for Application in Asymmetric Supercapacitor

被引:0
作者
Liu Xu [1 ]
Teng Teng [1 ]
Gu Lei-Xiang [1 ]
Ge Li-Chao [1 ]
He Wen [1 ]
Liao Hui-Yong [1 ]
Che Yi-Jun [1 ]
Liang Chong-Yao [1 ]
Dan Yuan-Yuan [1 ,2 ]
Chen Li-Zhuang [1 ,2 ]
机构
[1] Jiangsu Univ Sci & Technol, Sch Environm & Chem Engn, Zhenjiang 212003, Jiangsu, Peoples R China
[2] Jiangsu Univ Sci & Technol, Marine Equipment & Technol Inst, Zhenjiang 212003, Jiangsu, Peoples R China
关键词
layered sodium manganese oxides; asymmetric supercapacitor; electrochemical performance; ELECTROCHEMICAL PERFORMANCE; CAPACITIVE DEIONIZATION; HETEROSTRUCTURES; ELECTRODES; RUTHENIUM; HYDROXIDE; GRAPHENE; NANORODS; CATHODE; GROWTH;
D O I
10.14102/j.cnki.0254-5861.2011-2496
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
Layered sodium manganese oxides (LSMOs), with two-dimensional channels for ion diffusion, have been regarded as the promising electrode materials in the application of asymmetric supercapacitors (ASCs). In this work, the layered Na0.5Mn2O4 center dot 1.5H(2)O was synthesized through a facile hydrothermal method by controlling the molar ratio of sodium and manganese. When the molar ratio of sodium to manganese is 3:1, Na0.5Mn2O4 center dot 1.5H(2)O has shown the best capacitance of 369 F/g with current density of 0.5 A/g, and maintained a capacitance of 265 F/g after 2000 cycles. The asymmetric supercapacitor consists of the sodium manages oxides as the positive electrode and active carbon (AC) as the negative electrode in 1 mol/L Na2SO4 solution. The voltage of the asymmetric supercapacitor has been expanded to 0 similar to 2 V with an energy density of 10.13 Wh/kg at a power density of 500 W/kg based on the total weight of both active electrode materials when the mass ratio of AC to Na0.5Mn2O4 center dot 1.5H(2)O was 3:1.
引用
收藏
页码:756 / 764
页数:9
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