Effects of current density on preparation of grainy electrolytic manganese dioxide
来源期刊：中南大学学报(英文版)2005年第6期
论文作者：郭华军 朱炳权 李新海 张新明 王志兴 彭文杰 刘鲁平
文章页码：667 - 670
Key words：alkaline batteries; electrolytic manganese dioxide; current density; electrodeposition
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/dm2. 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.
