文献类型：期刊文献

英文题名：The effects of Mg2+concentration, (NH4)2SO4 concentration and current density on electrolytic manganese process

作者：Wang, Hai-Feng Qin, Ji-Tao Tian, Jia-Yu Wang, Jia-Wei Zhao, Ping-Yuan Lu, Fang-Hai

第一作者：Wang, Hai-Feng

通信作者：Wang, Jia-Wei

机构：[1] College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China; [2] Engineering Technology and Research Center of Manganese Material for Battery, Tongren, Guizhou, 554300, China; [3] Guizhou Province Key Laboratory of Metallurgical Engineering and Energy Saving, Guiyang, 550025, China; [4] School of Metallurgy and Environment, Central South University, Changsha, 410083, China; [5] School of Materials and Metallurgical Engineering, Guizhou Institute of Technology, Guiyang, 550003, China

第一机构：College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

通信机构：College of Materials and Metallurgy, Guizhou University, Guiyang, 550025, China

年份：2021

卷号：8

期号：2

外文期刊名：Materials Research Express

收录：EI(收录号：20210909977799);Scopus(收录号：2-s2.0-85101382015)

语种：英文

外文关键词：Cyclic voltammetry - Efficiency - Electrolytes - Manganese - Sheet metal - Electrodes - Electrolysis - Nitrogen compounds - Crystal orientation - Morphology

摘要：In this paper, the effects ofMg2+ concentration, (NH4)2SO4 concentration and current density on the current efficiency, cell voltage and morphology of electrolytic manganese metal were studied. The current efficiency of electrolytic manganese decreased with the increase ofMg2+ concentration in the electrolyte; Increasing the concentration of (NH4)2SO4 , the current efficiency of electrolytic manganese showed a gradually increasing trend. By changing the current density, the current efficiency of electrolytic manganese increased first and then decreased. When the current density was 400 A m-2, the current efficiency was the highest, it was about 66.63%. The cell voltage in the process of manganese electrolysis was independent ofMg2+ concentration and (NH4)2SO4 concentration, but only positively related to current density. Through the macroscopic analysis of the cathode plate, the greater the current efficiency was, the brighter the color of the metal manganese sheet was, it shew a silver white, and the dendritic growth of metal manganese was less. From the microscopic morphology of the manganese metal sheet, the electrolytic manganese metal was formed by stacking metal manganese sheets, each metal manganese sheet exhibited a regular hexagonal structure, the shape was similar to a 'pyramid', it had a better compactness, in which the better the current efficiency was, the better the compactness of the electrolytic manganese metal was. Under different experimental conditions, crystal plane (330,411) was the strongest and best orientation for the growth of electrolytic manganese. Cyclic voltammetry experiments showed thatMg2+ was not beneficial to electrodeposition of manganese, the increase of (NH4)2SO4 was beneficial to improve the current efficiency, and it was consistent with the conclusion of electrolysis experiment. ? 2021 The Author(s).