中文版 | English
Title

Copper activated near-full two-electron Mn4+/Mn2+ redox for mild aqueous Zn/MnO2 battery

Author
Corresponding AuthorZhang,Kaili
Publication Years
2022-12-15
DOI
Source Title
ISSN
1385-8947
EISSN
1873-3212
Volume450
Abstract
Compared with traditional one-electron Mn4+/Mn3+ redox couple (308 mAh g-1), two-electron Mn4+/Mn2+ redox mechanism doubles the theoretical capacity (616 mAh g- 1) of Zn/MnO2 batteries. However, in most cases, activating the Mn4+/Mn2+ redox couple requires a low pH value, which often leads to corrosion issues. Herein, a binder-free Cu-doped epsilon-MnO2 (CMO) was synthesized through a facile electrodeposition method and the two -electron Mn4+/Mn2+ redox is achieved in near-neutral ZnSO4 electrolyte with a working potential window of 0.8-1.9 V. Detailed characterizations demonstrate that the synergistic effect between Cu and Mn can boost the further reduction of Mn4+ and Mn3+ to dissoluble Mn2+ below 1.1 V. Compared with the capacity of epsilon-MnO2 (MO, 282.4 mAh g(-1)), which mainly involves Mn4+/Mn(3+)redox couple, the CMO cathode demonstrates an improved specific capacity of 397.4 mAh g-1 at 0.2 A g(-1). Besides, the fast reaction kinetics of H+ insertion, Mn dissolution, and Mn deposition reactions endow CMO with excellent rate performance, achieving a high specific capacity of 298.9 mAh g- 1 at 5 A g- 1.
Keywords
URL[Source Record]
Indexed By
SCI ; EI
Language
English
SUSTech Authorship
Others
Funding Project
Donations for Research Projects_RMGS[9229006] ; Basic Research Project of the Science and Technology Innovation Commission of Shenzhen[JCYJ20200109141640095] ; Guangdong -Hong Kong -Macao Joint Lab- oratory[2019B121205001] ; National Natural Science Foundation of China[21875097]
WOS Research Area
Engineering
WOS Subject
Engineering, Environmental ; Engineering, Chemical
WOS Accession No
WOS:000830812900003
Publisher
EI Accession Number
20222812353304
EI Keywords
Copper ; Copper compounds ; Corrosion ; Electric batteries ; Electrodes ; Electrons ; Manganese ; Manganese oxide ; Reaction kinetics ; Zinc compounds
ESI Classification Code
Manganese and Alloys:543.2 ; Copper:544.1 ; Electric Batteries and Fuel Cells:702 ; Electric Batteries:702.1 ; Chemical Reactions:802.2 ; Chemical Agents and Basic Industrial Chemicals:803 ; Chemical Products Generally:804
ESI Research Field
ENGINEERING
Scopus EID
2-s2.0-85133784005
Data Source
Web of Science
Citation statistics
Cited Times [WOS]:8
Document TypeJournal Article
Identifierhttp://kc.sustech.edu.cn/handle/2SGJ60CL/355877
DepartmentDepartment of Materials Science and Engineering
Affiliation
1.Department of Mechanical Engineering,City University of Hong Kong,83 Tat Chee Avenue,Hong Kong
2.Department of Materials Science and Engineering,and Center of Super-Diamond and Advanced Films,City University of Hong Kong,83 Tat Chee Avenue,Hong Kong
3.School of Materials and Energy,Guangdong University of Technology,Guangzhou,510001,China
4.Department of Materials Science and Engineering,Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices,Southern University of Science and Technology,Shenzhen,Guangdong,518055,China
Recommended Citation
GB/T 7714
Chen,Yatu,Gu,Shuai,Wu,Shuilin,et al. Copper activated near-full two-electron Mn4+/Mn2+ redox for mild aqueous Zn/MnO2 battery[J]. CHEMICAL ENGINEERING JOURNAL,2022,450.
APA
Chen,Yatu.,Gu,Shuai.,Wu,Shuilin.,Ma,Xiaoxia.,Hussain,Iftikhar.,...&Zhang,Kaili.(2022).Copper activated near-full two-electron Mn4+/Mn2+ redox for mild aqueous Zn/MnO2 battery.CHEMICAL ENGINEERING JOURNAL,450.
MLA
Chen,Yatu,et al."Copper activated near-full two-electron Mn4+/Mn2+ redox for mild aqueous Zn/MnO2 battery".CHEMICAL ENGINEERING JOURNAL 450(2022).
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