期刊
JOURNAL OF MATERIALS CHEMISTRY A
卷 2, 期 28, 页码 10895-10903出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ta00538d
关键词
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资金
- 973 project [2013CB934001]
- NSF of China [51172024, 51372022, 51302011]
- Fundamental Research Funds for the Central Universities of China [FRF-TP-09-007A, FRF-TP-13-036A]
- China PSF [2012M520165]
Lightweight flexible energy storage devices have aroused great attention due to the remarkably increasing demand for ultrathin and portable electronic devices. As typical new two-dimensional carbon materials, graphene-based porous structures with ultra-light weight and exclusive electrochemical properties have demonstrated outstanding capacitive ability in supercapacitors. Thus far, the performance of all-solid-state supercapacitors achieved from graphene-based materials is still unsatisfactory. In this work, we have rationally designed graphene/porous carbon (GN/PC) aerogels via a simple green strategy to achieve flexible porous electrode materials. The ordered porous carbon (PC) with high specific surface area and good capacitance was introduced as a spacer to efficiently inhibit the restacking of graphene (GN) sheets, which significantly enhanced the specific surface area and facilitated the transport and diffusion of ions and electrons in the as-synthesized porous hybrid structure. The all-solid-state electrodes fabricated by the as-prepared GN/PC aerogels presented excellent flexibility, high specific capacitance and good rate performance in a polyvinyl alcohol/KOH gel electrolyte. Implication of the specific capacitances of similar to 187 F g(-1) at 1 A g(-1) and 140 F g(-1) at 10 A g(-1) suggests that the GN/PC aerogels promise great potentials in the development of lightweight high-performance flexible energy storage devices.
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