Ko, Young-Jin Choi, Keunsu Kim, Jun-Yong Kim, Inho Jeong, Doo Seok Choi, Heon-Jin Mizuseki, Hiroshi Lee, Wook-Seong 2024-01-19T23:31:59Z 2024-01-19T23:31:59Z 2021-09-03 2018-02 0008-6223 https://pubs.kist.re.kr/handle/201004/121745 We investigate the application of the onion-like carbon (OLC) as an electrocatalyst for [VO](2+)/[VO2](+) redox flow reaction; its performance (electrocatalytic activity and reversibility) strongly increases with the synthesis to peak at 1800 degrees C in 1000-2000 degrees C range. The dopant/modification-free, optimized redox performances of the OLC is comparable to some of the best data in the literature of various types of carbon materials with post-synthesis modifications or doping. Mechanism behind such performance optimization is investigated employing various physical/electrochemical analyses as well as the first-principles calculations. We demonstrate that the carbon dangling bonds or the crystalline defects, generated by an inherent mechanism unique to the OLC, played a pivotal role in determining the electrocatalytic performances. (C) 2017 Elsevier Ltd. All rights reserved. English PERGAMON-ELSEVIER SCIENCE LTD Onion-like carbon as dopant/modification-free electrocatalyst for [VO](2+)/[VO2](+) redox reaction: Performance-control mechanism Article 10.1016/j.carbon.2017.10.073 1 CARBON, v.127, pp.31 - 40 CARBON 127 31 40 N scie scopus 000417484000004 2-s2.0-85032438734 Chemistry, Physical Materials Science, Multidisciplinary Chemistry Materials Science Article GRAPHITE ELECTRODE MATERIALS TOTAL-ENERGY CALCULATIONS FLOW BATTERY APPLICATION RAMAN-SPECTROSCOPY FELT ELECTRODE VO2+/VO2+ GRAPHENE NANODIAMOND CATALYST STORAGE Onion-like carbon Vacancy generation Inherent tensile strain Vanadium redox reaction First-principles calculation