| 新型超大容量电容器电极材料—纳米水合MnO2的研究 |
| Study of New Electrode Materials for Ultracapacitors: Hydrous Nano-MnO2 |
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| 摘要: 本文用KMnO4氧化MnSO4制得纳米水合MnO2粉末。以该粉末作为活性物质制成电极分别在物质的量浓度为0.1mol·L-1的Na2SO4、0.5mol·L-1的Na2SO4、2.0mol·L-1的(NH4)2SO4水溶液中 |
| 关键词: 超大容量电容器 纳米MnO2 电解液 循环性能 |
| 基金项目: |
| Abstract: Hydrous nano-MnO2 was synthesized by oxidation of aqueous MnSO4 with KMnO4 solution at pH≈ 10.6. Hydrous nano MnO2 in Na2SO4 and (NH4)2SO4 aqueous electrolytes proves to be an ex cellent electrode material for faradic capacitor. Cyclic voltammograms versus SCE give ideal capacitor behavior between 0.0 and 0.85V in 0.5mol· L-1 Na2SO4 and between 0.15 and 0.85V in 2.0mol· L-1 (NH4)2SO4 with a constant specific capacitance over 5000 cycles of about 177.5 F·g1 and 159F· g1,respectively.By 10mA and 50mA constant current charge/discharge in 0.5mol·L-1 Na2SO4, hydrous nano MnO2 can provide a specific capacitance of 177.5F·g1 and 167.5F·g1,respectively. These results demonstrate that in 0.5mol· L-1 Na2SO4 solution, hydrous nano MnO2 can provide ideal capacitance characterization and excellent cyclicability. |
| Keywords: supercapacitor nano-MnO2 electrolyte cyclicability |
| 投稿时间：2001-03-14 修订日期：2001-05-15 |
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| 闪星,董国君,景晓燕,张密林.新型超大容量电容器电极材料—纳米水合MnO2的研究[J].无机化学学报,2001,17(5):669-674. |
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