Effect of the Carbon on the Electrochemical Performance of Rechargeable Zn-Air Batteries
Carbon materials as catalyst substrates play key roles in Zn-air batteries which not only construct abundant tri-phase interfaces for the ORR and OER reactions to take place but also enable diffusion of reactants. Carbon corrosion is known to occur in the aqueous electrolyte and leads to catalysts dissolution, electrode flooding, and rapid performance degradation. In this study, rechargeable Zn-air batteries with carbon black, CNTs, and graphene as carbon supports and MnO2 as the bifunctional catalysts have been assembled and with electrochemical performance systematically evaluated. The correlation between the graphitization, surface, structure properties of the carbon, electrochemical properties of air-electrodes have been elucidated. The electrolyte composition change during cycling and the corrosion mechanism of carbon have been explored. CNTs with high crystallinity and less edge exposure is an excellent candidate over activated carbon and graphene for metal-air batteries
Year of publication: |
[2022]
|
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Authors: | Peng, Chunyu ; Xu, Xinye ; Zhang, Shiming ; Liu, Weilan ; Liu, Xiang ; LAI, LINFEI |
Publisher: |
[S.l.] : SSRN |
Saved in:
freely available
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