Title | Copper activated near-full two-electron Mn4+/Mn2+ redox for mild aqueous Zn/MnO2 battery |
Author | |
Corresponding Author | Zhang,Kaili |
Publication Years | 2022-12-15
|
DOI | |
Source Title | |
ISSN | 1385-8947
|
EISSN | 1873-3212
|
Volume | 450 |
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 | |
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
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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 Type | Journal Article |
Identifier | http://kc.sustech.edu.cn/handle/2SGJ60CL/355877 |
Department | Department 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.
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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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