The roles and electrochemical characterizations of activated carbon in zinc air battery cathodes |
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Authors: | Seung-Wook Eom Chang-Woo Lee Yang-Kook Sun |
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Affiliation: | a Battery Research Group, Korea Electrotechnology Research Institute (KERI), P.O. Box 20, Changwon 641-600, South Korea b Department of Chemical Engineering, Hanyang University, Seoul 133-791, South Korea |
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Abstract: | We prepared cathodes with various types of activated carbon and measured the cathodes’ electrochemical performance according to the kind of activated carbon. Activated carbon supplies airflow channels and reaction sites in the cathode of zinc air batteries. When we use activated carbon with a high specific surface area as the cathode's catalyst substrate, we expect high electrochemical performance because this type of carbon provides more air flow channels and reaction sites.We focused on investigating the relationship between the cathode's pore structure and its electrochemical characterizations. We also studied the effects of the various activated carbon materials on the zinc air batteries’ performance. Increasing the macropores or mesopores in the activated carbon resulted in achieving more power from the battery. |
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Keywords: | Zinc air batteries Cathode Activated carbon Electrochemical characterization Pore structure |
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