| 研究実績の概要 |
Graphene-analogous nanosheets are rising material stars, yet the common nanosheet powders have high contact resistance, weak porosity structure, and low surface area. Three dimensional designed structures of nanosheets are most desired to overcome such drawbacks and to deliver the unique properties of graphene-analogs to the macroscale; however their practical production remains insufficient. This project aims to develop novel three dimensional structures of carbon-nitrogen nanosheets by effective production and to study their applications in energy conversion, e.g. supercapacitors and lithium ion batteries.
We established a synthesis route, namely ammonium-assistant chemical blowing, to produce three dimensional strutted graphenes with low-nitrogen fraction in this year. The three dimensional architectures were applied as additive-free binder-free electrodes in supercapacitors, which realized high energy density of 50 Wh/kg at high power density (Nano Energy 2015, submitted). We will further push on the three dimensional strutted graphenes to other energy-related applications such as lithium ion batteries.
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