Fundamental properties of nanostructured diamond and its application to
electric double layer capacitor
Our group attempted to reveal specific behavior of reacting morecules in
nano-space we created.
We aim to create new electrochemical application utilizing specificity
of conductive diamond, DLC, and nanospaces.
Electric double-layer capacitors with high energy density can be
realized by utilizing wide working potential range inherent in BDD.
When the surface of nanoporous honeycomb diamond is nanostructured,
electric double layer capacitance (of the electrode using the diamond)
can be increased. In the case of nano-honeycomb diamond with a pore
diameter of 400 nm and a pore depth of 3 μm, it increased 400-fold (3.9
mF cm-2).
Energy density (of the electric double layer capacitor) was 225 J g-1 and comparable to that of conventional active carbon electrodes (50 to
200 g-1).
References
1) K. Honda, T. N. Rao, D. A. Tryk, A. Fujishima, M. Watanabe, K. Yasui, and H. Masuda, J. Electrochem. Soc., 147, 659 (2000).
“Electrochemical Characterization of the Nanoporous Honeycomb Diamond Electrode as an Electrical Double-Layer Capacitor”
