| Effects of current density on preparation of grainy electrolytic manganese dioxide |
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| 作者姓名： | 郭华军 朱炳权 李新海 张新明 王志兴 彭文杰 刘鲁平 |
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| 作者单位： | [1]School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China [2]School of Materials Science and Engineering, Central South University, Changsha 410083, China |
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| 基金项目： | the National Natural Science Foundation of China，中国博士后科学基金 |
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| 摘 要： | Grainy electrolytic manganese dioxide was prepared by electrodeposition in a 0.9 mol/L MnSO4 and 2.5 mol/L H2SO4 solution. The structure, particle size and appearance of the grainy electrolytic manganese dioxide were determined by powder X-ray diffraction, laser particle size analysis and scanning electron micrographs measurements. Current density has important effects on cell voltage, anodic current efficiency and particle size of the grainy electrolytic manganese dioxide, and the optimum current density is 30 A/dm^2. The grainy electrolytic manganese dioxide electrodeposited under the optimum conditions consists of γ-MnO2 with an orthorhombic lattice structure; the grainy electrolytic manganese dioxide has a spherical or sphere-like appearance and a narrow particle size distribution with an average particle diameter of 7. 237μm.
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| 关 键 词： | 电积 电解二氧化锰 碱性电池 电流密度 电极材料 |
| 文章编号： | 1005-9784（2005）06-0667-04 |
| 收稿时间： | 2005-04-12 |
| 修稿时间： | 2005-06-10 |
Effects of current density on preparation of grainy electrolytic manganese dioxide |
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| Guo Hua-jun , Zhu Bing-quan , Li Xin-hai , Zhang Xin-ming , Wang Zhi-xing , Peng Wen-jie and Liu Lu-ping.Effects of current density on preparation of grainy electrolytic manganese dioxide[J].Journal of Central South University of Technology,2005,12(6):667-670. |
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| Authors: | Guo Hua-jun Zhu Bing-quan Li Xin-hai Zhang Xin-ming Wang Zhi-xing Peng Wen-jie and Liu Lu-ping |
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| Affiliation: | (1) School of Metallurgical Science and Engineering, Central South University, 410083 Changsha, China;(2) School of Materials Science and Engineering, Central South University, 410083 Changsha, China |
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| Abstract: | Grainy electrolytic manganese dioxide was prepared by electrodeposition in a 0.9 mol/L MnSO4 and 2.5 mol/L H2SO4 solution. The structure, particle size and appearance of the grainy electrolytic manganese dioxide were determined by powder X-ray diffraction, laser particle size analysis and scanning electron micrographs measurements. Current density has important effects on cell voltage, anodic current efficiency and particle size of the grainy electrolytic manganese dioxide, and the optimum current density is 30 A/dm 2. The grainy electrolytic manganese dioxide electrodeposited under the optimum conditions consists of γ-MnO2 with an orthorhombic lattice structure; the grainy electrolytic manganese dioxide has a spherical or sphere-like appearance and a narrow particle size distribution with an average particle diameter of 7.237 μm. |
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| Keywords: | alkaline batteries electrolytic manganese dioxide current density electrodeposition |
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