无黏结剂NiO/MnO2电极的制备及电化学性能测试

Preparation and Electrochemical Performance Test of Binderless NiO/MnO_(2) Electrode

【目的】电极材料是整个电容器的核心,制备高性能电容材料具有重要的实际意义。【方法】通过水热原位生长法及程序升温煅烧法制备NiO/MnO_(2)复合电极,并探究程序升温速率对电化学性能的影响。【结果】NiO/MnO_(2)复合电极相对于单一电极具有较好的电化学性能,其中120℃水热原位生长8 h、程序升温速率为2℃/min所获得的NiO/MnO_(2)电极的电化学性能较好,在电流密度为1 mA/cm^(2)的条件下,面积比电容达到1313 mF/cm^(2)。【结论】该方法温和、简单,原位生长的方式能够提高活性物质的机械附着性和利用率,复合材料的活性物质间表现出较好的协同效应,可以有效提高材料的电化学性能。

[Purposes]Electrode material serves as the fundamental component of the entire capacitor,so it is of great practical significance to prepare high performance capacitor materials.[Methods]The NiO/MnO_(2) composite electrode was synthesized via a hydrothermal in-situ growth method followed by temperature programmed calcination,and the impact of the temperature ramp rate on its electrochemical performance was investigated.[Findings]Compared to a single electrode,the NiO/MnO_(2) composite electrode exhibits superior electrochemical performance.Notably,the NiO/MnO_(2) electrode synthesized through hydrothermal in-situ growth at 120℃ for 8 hours with a temperature programming rate of 2℃/min demonstrates improved electrochemical performance.The electrode obtained at a current density of 1 mA/cm^(2) exhibited an area specific capacitance of 1313 mF/cm^(2).[Conclusions]The method is gentle and straightforward,and the in-situ growth technique can enhance the mechanical adhesion and utilization of the active substances,The active substances of the composite exhibit a remarkable synergistic effect,effectively enhancing the material's electrochemical performance.