Effect of the carbon on the electrochemical performance of rechargeable Zn-air batteries

Chunyu Peng, Jiankang Chen, Mengmeng Jin, Xiaoying Bi, Chang Yi, Shiming Zhang, Xinye Xu, Weilan Liu, Xiang Liu, Linfei Lai

科研成果: 期刊稿件文章同行评审

14 引用 (Scopus)

摘要

Carbon materials as catalyst substrates play key roles in Zn-air batteries which not only construct abundant tri-phase interfaces for the oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) to take place but also enable the diffusion of reactants. Carbon corrosion is known to occur in the aqueous electrolyte which leads to catalysts dissolution, electrode flooding, and rapid performance degradation. In this study, rechargeable Zn-air batteries with MnO2 as the bifunctional catalysts and different carbon as catalyst carriers, such as carbon black, CNTs, and graphene have been assembled with their electrochemical performance systematically evaluated. The correlation between the graphitization, surface, structure properties of the carbon, and the electrochemical performance of air-electrodes has been elucidated. The electrolyte composition change during cycling and the underlying corrosion mechanism of carbon have been explored. CNTs with high crystallinity and less edge exposure is an excellent candidate over activated carbon and graphene as a catalyst carrier for metal-air batteries.

源语言英语
页(从-至)5313-5322
页数10
期刊International Journal of Hydrogen Energy
48
13
DOI
出版状态已出版 - 12 2月 2023

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