Kim, Yong Jung Yang, Cheol-Min Park, Ki Chul Kaneko, Katsumi Kim, Yoong Ahm Noguchi, Minoru Fujino, Takeshi Oyama, Shigeki Endo, Morinobu 2024-01-20T15:05:19Z 2024-01-20T15:05:19Z 2021-09-05 2012-03 1864-5631 https://pubs.kist.re.kr/handle/201004/129458 Supercapacitors can store and deliver energy by a simple charge separation, and thus they could be an attractive option to meet transient high energy density in operating fuel cells and in electric and hybrid electric vehicles. To achieve such requirements, intensive studies have been carried out to improve the volumetric capacitance in supercapacitors using various types and forms of carbons including carbon nanotubes and graphenes. However, conventional porous carbons are not suitable for use as electrode material in supercapacitors for such high energy density applications. Here, we show that edge-enriched porous carbons are the best electrode material for high energy density supercapacitors to be used in vehicles as an auxiliary powertrain. Molten potassium hydroxide penetrates well-aligned graphene layers vertically and consequently generates both suitable pores that are easily accessible to the electrolyte and a large fraction of electrochemically active edge sites. We expect that our findings will motivate further research related to energy storage devices and also environmentally friendly electric vehicles. English WILEY-V C H VERLAG GMBH DOUBLE-LAYER CAPACITORS HIGH-POWER ELECTROCHEMICAL CAPACITORS DIFFERENTIAL CAPACITANCE NANOTUBE ELECTRODES GRAPHENE ULTRACAPACITORS PERFORMANCE MESOPHASE ELECTROLYTES Edge-Enriched, Porous Carbon-Based, High Energy Density Supercapacitors for Hybrid Electric Vehicles Article 10.1002/cssc.201100511 1 CHEMSUSCHEM, v.5, no.3, pp.535 - 541 CHEMSUSCHEM 5 3 535 541 scie scopus 000301651700008 2-s2.0-84858672370 Chemistry, Multidisciplinary Green & Sustainable Science & Technology Chemistry Science & Technology - Other Topics Article DOUBLE-LAYER CAPACITORS HIGH-POWER ELECTROCHEMICAL CAPACITORS DIFFERENTIAL CAPACITANCE NANOTUBE ELECTRODES GRAPHENE ULTRACAPACITORS PERFORMANCE MESOPHASE ELECTROLYTES carbon edges electron microscopy energy storage supercapacitor