Kang, Dong Hyuk Lee, Eunji Youn, Beom Sik Ha, Son Hyun, Jong Chan Yoon, Juhee Jang, Dawon Kim, Kyoung Sun Kim, Hyungsub Lee, Sang Moon Lee, Sungho Jin, Hyoung-Joon Lim, Hyung-Kyu Yun, Young Soo 2024-01-19T11:01:07Z 2024-01-19T11:01:07Z 2022-07-28 2022-11 2637-9368 https://pubs.kist.re.kr/handle/201004/114440 Zinc metal anodes (ZMA) have high theoretical capacities (820 mAh g(-1) and 5855 mAh cm(-3)) and redox potential (-0.76 V vs. standard hydrogen electrode), similar to the electrochemical voltage window of the hydrogen evolution reaction (HER) in a mild acidic electrolyte system, facilitating aqueous zinc batteries competitive in next-generation energy storage devices. However, the HER and byproduct formation effectuated by water-splitting deteriorate the electrochemical performance of ZMA, limiting their application. In this study, a key factor in promoting the HER in carbon-based electrode materials (CEMs), which can provide a larger active surface area and guide uniform zinc metal deposition, was investigated using a series of three-dimensional structured templating carbon electrodes (3D-TCEs) with different local graphitic orderings, pore structures, and surface properties. The ultramicropores of CEMs are the determining critical factors in initiating HER and clogging active surfaces by Zn(OH)(2) byproduct formation, through a systematic comparative study based on the 3D-TCE series samples. When the 3D-TCEs had a proper graphitic structure with few ultramicropores, they showed highly stable cycling performances over 2000 cycles with average Coulombic efficiencies of >= 99%. These results suggest that a well-designed CEM can lead to high-performance ZMA in aqueous zinc batteries. English Wiley Critical factors to inhibit water-splitting side reaction in carbon-based electrode materials for zinc metal anodes Article 10.1002/cey2.254 1 Carbon Energy, v.4, no.6, pp.1080 - 1092 Carbon Energy 4 6 1080 1092 Y scie scopus 000827904300001 Chemistry, Physical Energy & Fuels Nanoscience & Nanotechnology Materials Science, Multidisciplinary Chemistry Energy & Fuels Science & Technology - Other Topics Materials Science Article RECENT PROGRESS HYDROGEN BATTERIES CHALLENGES EVOLUTION aqueous batteries carbon electrode hydrogen evolution reaction multivalent ion zinc metal anode