title: Enhanced electric double layer capacitance of graphite oxide intercalated by poly(sodium 4-styrensulfonate) with high cycle stability.
abstract: We propose a new material for high power and high density supercapacitors with excellent cycle stability. Graphite oxide (PSS-GO) intercalated with poly(sodium 4-styrensulfonate) showed high performance of electric double layer capacitance (EDLC) compared to that of the pristine graphite oxide. Specific capacitance of the PSS-GO reached 190 F/g, and the energy density was much improved to 38 Wh/kg with a power density of 61 W/kg. Cycle test showed that the specific capacitance decreased by only 12% after 14860 cycles, providing excellent cyclic stability. The high EDLC performance of PSS-GO composite was attributed to the wide interlayer distance and simple pore structures accommodating fast ion kinetics.
authors.affiliation: Department of Energy Science, Sungkyunkwan Advanced Institute of Nanotechnology, Sungkyunkwan University, Suwon 440-746, South Korea.
authors.forename: Hae-Kyung
authors.initials: HK
authors.lastname: Jeong
authors.forename: Meihua
authors.initials: M
authors.lastname: Jin
authors.forename: Eun Ju
authors.initials: EJ
authors.lastname: Ra
authors.forename: Kyeu Yoon
authors.initials: KY
authors.lastname: Sheem
authors.forename: Gang Hee
authors.initials: GH
authors.lastname: Han
authors.forename: Sivaram
authors.initials: S
authors.lastname: Arepalli
authors.forename: Young Hee
authors.initials: YH
authors.lastname: Lee