title: Liquid-mediated dense integration of graphene materials for compact capacitive energy storage.
abstract: Porous yet densely packed carbon electrodes with high ion-accessible surface area and low ion transport resistance are crucial to the realization of high-density electrochemical capacitive energy storage but have proved to be very challenging to produce. Taking advantage of chemically converted graphene's intrinsic microcorrugated two-dimensional configuration and self-assembly behavior, we show that such materials can be readily formed by capillary compression of adaptive graphene gel films in the presence of a nonvolatile liquid electrolyte. This simple soft approach enables subnanometer scale integration of graphene sheets with electrolytes to form highly compact carbon electrodes with a continuous ion transport network. Electrochemical capacitors based on the resulting films can obtain volumetric energy densities approaching 60 watt-hours per liter.
authors.affiliation: Department of Materials Engineering, Monash University, Clayton, VIC 3800, Australia.
authors.forename: Xiaowei
authors.initials: X
authors.lastname: Yang
authors.forename: Chi
authors.initials: C
authors.lastname: Cheng
authors.forename: Yufei
authors.initials: Y
authors.lastname: Wang
authors.forename: Ling
authors.initials: L
authors.lastname: Qiu
authors.forename: Dan
authors.initials: D
authors.lastname: Li