Facile Synthesis of Layered Sodium Manganese Oxide for Application in Asymmetric Supercapacitor
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 Na0.5Mn2O4·1.5H2O 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,Na0.5Mn2O4·1.5H2O 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 0~2 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 Na0.5Mn2O4·1.5H2O was 3:1.
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共引文献2
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1谢永纯,王成,蒋芳,杨洋,苏静,龙云飞,文衍宣.钠锰比对Na_xMnO_2的性能和钠离子脱嵌过程的影响[J].电化学,2018,24(4):375-384. 被引量：1
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2张远朋,赵方晖,张国举,杨洁,段连峰.多金属共掺杂制备Na0.67Mn0.67Ni0.33-xCoxO2钠离子电池正极材料及电化学性能优化机理研究[J].机械工程学报,2020,56(10):117-126. 被引量：1
