Ethyl Viologen as a Superoxide Quencher to Enhance the Oxygen Reduction Reaction in Li-O-2 Batteries

Wu, Sisi1,2; Yang, Jing3; Qin, Ning1,4; Li, Yingzhi1; Wang, Haiou1; Zhang, Yong-Wei3; Wang, Qing2; Lu, Zhouguang1

2022-07-25

10.1021/acsaem.2c01501

ACS Applied Energy Materials   影响因子和分区

2574-0962

LiO2 is a critical intermediate of oxygen reduction reaction in nonaqueous Li-O-2 batteries that largely determines the discharge capacity and cycling stability. Currently, functional redox mediators that can promote the solution reaction route by enhancing the solvation of LiO2 have attracted tremendous interest to increase the attainable capacity. Conversely, redox mediators that quench LiO2 and facilitate the surface reaction route receive little attention. Here, we provide an in-depth exploration of the catalytic pathway and effect of a superoxide quencher that modulates the surface growth of Li2O2. Surprisingly, the predomination of the surface reaction route by ethyl viologen helps deliver a capacity as much as that promoted by the solution reaction route. The findings of this work provide a new direction of screening and evaluating functioning redox mediators for Li-O2 batteries.

O-2 batteries redox mediator oxygen reduction reaction LiO2 intermediate catalysis

SCI ; EI

英语

第一 ; 通讯

National Natural Science Foundation of China["21875097","21671096"] ; Shenzhen Key Laboratory of Interfacial Science and Engineering of Materials[ZDSYS20200421111401738] ; National Research Foundation, Singapore["NRF-CRP24-2020-0002","NRF-NRFI2018-06"]

Chemistry ; Energy & Fuels ; Materials Science

Chemistry, Physical ; Energy & Fuels ; Materials Science, Multidisciplinary

WOS:000829220100001

AMER CHEMICAL SOC

20223412598802

Electrolytic reduction ; Reaction intermediates ; Surface reactions

Ore Treatment:533.1 ; Chemical Reactions:802.2 ; Chemical Products Generally:804

Web of Science

1.Southern Univ Sci & Technol, Dept Mat Sci & Engn, Shenzhen Key Lab Interfacial Sci & Engn Mat, Shenzhen 518055, Peoples R China
2.Natl Univ Singapore, Fac Engn, Dept Mat Sci & Engn, Singapore 117576, Singapore
3.ASTAR, Inst High Performance Comp, Singapore 138632, Singapore
4.City Univ Hong Kong, Dept Mech Engn, Kowloon, Hong Kong 999077, Peoples R China

Wu, Sisi,Yang, Jing,Qin, Ning,et al. Ethyl Viologen as a Superoxide Quencher to Enhance the Oxygen Reduction Reaction in Li-O-2 Batteries[J]. ACS Applied Energy Materials,2022,5(7):9040-9048.

Wu, Sisi.,Yang, Jing.,Qin, Ning.,Li, Yingzhi.,Wang, Haiou.,...&Lu, Zhouguang.(2022).Ethyl Viologen as a Superoxide Quencher to Enhance the Oxygen Reduction Reaction in Li-O-2 Batteries.ACS Applied Energy Materials,5(7),9040-9048.

Wu, Sisi,et al."Ethyl Viologen as a Superoxide Quencher to Enhance the Oxygen Reduction Reaction in Li-O-2 Batteries".ACS Applied Energy Materials 5.7(2022):9040-9048.