文献类型：期刊文献

英文题名：The effects of Mg2+ concentration, (NH4)(2)SO4 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, JW[1];Wang, JW[2];Wang, JW[3]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;[2]Engn Technol & Res Ctr Manganese Mat Battery, Tongren 554300, Guizhou, Peoples R China;[3]Guizhou Prov Key Lab Met Engn & Energy Saving Gui, Guiyang 550025, Peoples R China;[4]Cent South Univ, Sch Met & Environm, Changsha 410083, Peoples R China;[5]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;corresponding author), Engn Technol & Res Ctr Manganese Mat Battery, Tongren 554300, Guizhou, Peoples R China;corresponding author), Guizhou Prov Key Lab Met Engn & Energy Saving Gui, Guiyang 550025, Peoples R China.

年份：2021

卷号：8

期号：2

外文期刊名：MATERIALS RESEARCH EXPRESS

收录：;WOS:【SCI-EXPANDED(收录号:WOS:000617562500001)】；

基金：The fund supports were from the National Natural Science Foundation of China (51764006, 51864012 and 51664010). Science and Technology Project of Guizhou Province([2017]5788, [2018]5071, [2019]1411,).

语种：英文

外文关键词：electrolytic manganese; Mg2+; current efficiency; cell voltage; micro structure

摘要：In this paper, the effects of Mg2+ concentration, (NH4)(2)SO4 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 of Mg2+ concentration in the electrolyte; Increasing the concentration of (NH4)(2)SO4 , 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 Am-2, the current efficiency was the highest, it was about 66.63%. The cell voltage in the process of manganese electrolysis was independent of Mg2+ concentration and (NH4)(2)SO4 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 that Mg2+ was not beneficial to electrodeposition of manganese, the increase of (NH4)(2)SO4 was beneficial to improve the current efficiency, and it was consistent with the conclusion of electrolysis experiment.