title: Selective ultrathin carbon sheath on porous silicon nanowires: materials for extremely high energy density planar micro-supercapacitors.
abstract: Microsupercapacitors are attractive energy storage devices for integration with autonomous microsensor networks due to their high-power capabilities and robust cycle lifetimes. Here, we demonstrate porous silicon nanowires synthesized via a lithography compatible low-temperature wet etch and encapsulated in an ultrathin graphitic carbon sheath, as electrochemical double layer capacitor electrodes. Specific capacitance values reaching 325 mF cm(-2) are achieved, representing the highest specific ECDL capacitance for planar microsupercapacitor electrode materials to date.
authors.affiliation: Department of Chemical and Biomolecular Engineering, University of California , Berkeley, California 94720, United States.
authors.forename: John P
authors.initials: JP
authors.lastname: Alper
authors.forename: Shuang
authors.initials: S
authors.lastname: Wang
authors.forename: Francesca
authors.initials: F
authors.lastname: Rossi
authors.forename: Giancarlo
authors.initials: G
authors.lastname: Salviati
authors.forename: Nicholas
authors.initials: N
authors.lastname: Yiu
authors.forename: Carlo
authors.initials: C
authors.lastname: Carraro
authors.forename: Roya
authors.initials: R
authors.lastname: Maboudian