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Effects of current density on preparation of grainy electrolytic manganese dioxide

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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/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 7.237 µm.

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Authors and Affiliations

  1. School of Metallurgical Science and Engineering, Central South University, 410083, Changsha, China

    Guo Hua-jun PhD, Zhu Bing-quan, Li Xin-hai, Wang Zhi-xing, Peng Wen-jie & Liu Lu-ping

  2. School of Materials Science and Engineering, Central South University, 410083, Changsha, China

    Zhang Xin-ming

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  1. Guo Hua-jun PhD
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  2. Zhu Bing-quan
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  3. Li Xin-hai
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  4. Zhang Xin-ming
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  5. Wang Zhi-xing
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  6. Peng Wen-jie
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  7. Liu Lu-ping
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Correspondence to Guo Hua-jun PhD.

Additional information

Foundation item: Project(50302016) supported by the National Natural Science Foundation of China; project(2005037698) supported by Postdoctoral Science Foundation of China

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Guo, Hj., Zhu, Bq., Li, Xh. et al. Effects of current density on preparation of grainy electrolytic manganese dioxide. J Cent. South Univ. Technol. 12, 667–670 (2005). https://doi.org/10.1007/s11771-005-0066-1

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  • DOI: https://doi.org/10.1007/s11771-005-0066-1

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