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http://dx.doi.org/10.17702/jai.2021.22.1.1

Preparation of Electrocatalysts and Comparison of Electrode Interface Reaction for Hybrid Type Na-air Battery  

Kim, Kyoungho (Department of Chemical Industry, Dong-Eui Institute of Technology (DIT))
Publication Information
Journal of Adhesion and Interface / v.22, no.1, 2021 , pp. 1-7 More about this Journal
Abstract
The importance of high capacity energy storage devices has recently emerged for stable power supply through renewable energy generation. From this point of view, the Na-air battery (NAB), which is a next-generation secondary battery, is receiving huge attention because it can realize a high capacity through abundant and inexpensive raw materials. In this study, activated carbon-based catalysts for hybrid type Na-air batteries were prepared and their characteristics were compared and analysed. In particular, from the viewpoint of resource recycling, activated carbon (Orange-C) was prepared using discarded orange peel, and performance was compared with Vulcan carbon, which is widely used. In addition, a Pt/C catalyst (homemade-Pt/C, HM-Pt/C) was synthesized using a modified polyol method to check whether the prepared activated carbon can be used as a supported catalyst, and a commercial Pt/C catalyst (Commercial Pt/C) and electrochemical performance were compared. The prepared Orange-C exhibited a typical H3 type BET isotherm, which is evidence that micropore and mesopore exist. In addition, in the case of HM-Pt/C, it was confirmed through TEM analysis that Pt particles were evenly distributed on the activated carbon supported catalyst. In particular, the HM-Pt/C-based NAB showed the smallest voltage gap (0.224V) and good voltage efficiency (92.34%) in the 1st galvanostatic charge-discharge test. In addition, the cycle performance test conducted for 20 cycles showed the most stable performance.
Keywords
Electrocatalyst; Hybrid type Na-air battery; Next generation secondary batteries; Voltage efficiency; Activated carbon;
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