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Edge‐Enriched, Porous Carbon‐Based, High Energy Density Supercapacitors for Hybrid Electric Vehicles
Author(s) -
Kim Yong Jung,
Yang CheolMin,
Park Ki Chul,
Kaneko Katsumi,
Kim Yoong Ahm,
Noguchi Minoru,
Fujino Takeshi,
Oyama Shigeki,
Endo Morinobu
Publication year - 2012
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201100511
Subject(s) - supercapacitor , materials science , capacitance , electrolyte , energy storage , carbon nanotube , graphene , carbon fibers , porosity , potassium hydroxide , nanotechnology , environmentally friendly , electrode , power density , chemical engineering , composite material , chemistry , composite number , power (physics) , ecology , physics , quantum mechanics , engineering , biology
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.