Science· 2013Q1
Liquid-Mediated Dense Integration of Graphene Materials for Compact Capacitive Energy Storage
- 1,828citations
- Q1SCImago
- 2013year
Short summary
A soft approach using capillary compression of graphene gel films with a nonvolatile liquid electrolyte yields sub-nanometer scale integration of graphene sheets, creating compact electrodes with continuous ion transport networks for energy storage.
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Key points
- A new soft approach utilizes capillary compression of graphene gel films with a nonvolatile liquid electrolyte.
- This method achieves sub-nanometer scale integration of graphene sheets and electrolytes.
- The resulting compact carbon electrodes feature a continuous ion transport network.
- Electrochemical capacitors based on these films demonstrate volumetric energy densities approaching 60 Wh/L.
AI-generated from the title and abstract; the full text is not read.
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.
The authors' abstract, as published at the source. Science, 2013 · DOI ↗
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Field: Electronic, Optical and Magnetic Materials
Electronic, Optical and Magnetic MaterialsMaterials Science