title: Molecular-scale heteroassembly of redoxable hydroxide nanosheets and conductive graphene into superlattice composites for high-performance supercapacitors.
abstract: Artificial superlattice nanocomposites are successfully prepared by electrostatic heteroassembly of redoxable Co-Al or Co-Ni layered double hydroxide (LDH) nanosheets with graphene. The superlattice electrodes exhibit a high capacity up to ca. 650 F/g, which is approximately 6 times that of pure graphene. The composites are found to be capable of superfast charging and discharging, up to ca. 100 Hz, comparable with the high-power performance of graphene electrodes.
authors.affiliation: International Center for Materials Nanoarchitectonics (WPI-MANA), National Institute for Materials Science (NIMS), 1-1 Namiki, Tsukuba, Ibaraki, 305-0044, Japan.
authors.forename: Renzhi
authors.initials: R
authors.lastname: Ma
authors.forename: Xiaohe
authors.initials: X
authors.lastname: Liu
authors.forename: Jianbo
authors.initials: J
authors.lastname: Liang
authors.forename: Yoshio
authors.initials: Y
authors.lastname: Bando
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Sasaki
keywords: composites; graphene; layered double hydroxides; supercapacitors; superlattices