TY - JOUR
T1 - Carbonate formation on carbon electrode in rechargeable zinc-air battery revealed by in-situ Raman measurements
AU - Wang, Tanyanyu
AU - Kunimoto, Masahiro
AU - Mori, Takanori
AU - Yanagisawa, Masahiro
AU - Niikura, Junji
AU - Takahashi, Ikuma
AU - Morita, Masayuki
AU - Abe, Takeshi
AU - Homma, Takayuki
N1 - Funding Information:
This work was supported by the Research and Development Initiative for Scientific Innovation of New Generation Batteries 2 (RISING2) Project [ JPNP16001 ] of the New Energy and Industrial Technology Development Organization (NEDO), Japan . The authors also thank Etsuo Yoda, Kyoto University , for supporting the preparation of electrodes. T. Wang is grateful for the financial support from the State Scholarship Fund of the China Scholarship Council [No. 201906230294 ].
Funding Information:
This work was supported by the Research and Development Initiative for Scientific Innovation of New Generation Batteries 2 (RISING2) Project [JPNP16001] of the New Energy and Industrial Technology Development Organization (NEDO), Japan. The authors also thank Etsuo Yoda, Kyoto University, for supporting the preparation of electrodes. T. Wang is grateful for the financial support from the State Scholarship Fund of the China Scholarship Council [No. 201906230294].
Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/6/15
Y1 - 2022/6/15
N2 - Carbonate formation on a carbon electrode for rechargeable zinc-air batteries can lead to degraded battery performance and limited lifetime for practical use. In this study, the carbonate formation is observed at an unexpected early working state through in-situ Raman measurements. The origin of carbonate formation from carbon corrosion in the alkaline electrolyte is revealed by its distribution near the potassium hydroxide solution via our self-developed multi-point Raman mapping apparatus. More importantly, it is found that during charging, the carbonate formation affects the formation of the zinc oxide byproduct and impedes the oxygen evolution reaction due to its consumption of hydroxyl ions. In comparison, insoluble carbonate precipitation is generated within the porous carbon electrode during discharging, which could block the oxygen throughput and consequently deteriorate the air electrode performance. This in-situ study clarifies the initial state of carbon electrode corrosion in the alkaline electrolyte, providing an insight into the future optimizations towards the air electrode design.
AB - Carbonate formation on a carbon electrode for rechargeable zinc-air batteries can lead to degraded battery performance and limited lifetime for practical use. In this study, the carbonate formation is observed at an unexpected early working state through in-situ Raman measurements. The origin of carbonate formation from carbon corrosion in the alkaline electrolyte is revealed by its distribution near the potassium hydroxide solution via our self-developed multi-point Raman mapping apparatus. More importantly, it is found that during charging, the carbonate formation affects the formation of the zinc oxide byproduct and impedes the oxygen evolution reaction due to its consumption of hydroxyl ions. In comparison, insoluble carbonate precipitation is generated within the porous carbon electrode during discharging, which could block the oxygen throughput and consequently deteriorate the air electrode performance. This in-situ study clarifies the initial state of carbon electrode corrosion in the alkaline electrolyte, providing an insight into the future optimizations towards the air electrode design.
KW - Carbon electrode
KW - Carbonate formation
KW - In-situ Raman
KW - Rechargeable zinc-air battery
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U2 - 10.1016/j.jpowsour.2022.231237
DO - 10.1016/j.jpowsour.2022.231237
M3 - Article
AN - SCOPUS:85128244279
SN - 0378-7753
VL - 533
JO - Journal of Power Sources
JF - Journal of Power Sources
M1 - 231237
ER -
