1. Fabrication of a Highly Conductive Ordered Porous Electrode by Carbon-Coating of a Continuous Mesoporous Silica Film
- Author
-
Norikazu Nishiyama, Taeri Kwon, Takashi Kyotani, Yu Fukura, Wataru Nakayama, Hirotomo Nishihara, Tetsuji Itoh, Shinichiroh Iwamura, and Yasuto Hoshikawa
- Subjects
Materials science ,Graphene ,General Chemical Engineering ,Nanotechnology ,General Chemistry ,Substrate (electronics) ,Current collector ,Mesoporous silica ,Electric double-layer capacitor ,law.invention ,Chemical engineering ,law ,Electrode ,Materials Chemistry ,Mesoporous material ,Layer (electronics) - Abstract
A mesoporous silica film (MSF, 20 × 20 mm in size) with 3D accessible mesopores (Fmmm symmetry) was synthesized on a current collector substrate, and then the entire pore surface was coated with an extremely thin carbon layer. The resulting carbon-coated mesoporous silica film (C/MSF), which well retains the continuous silica phase with its ordered mesopore network intact, has many advantages over conventional MSFs, porous carbons, or carbon electrodes. Thanks to the continuous carbon-coated layer, C/MSF is electrically conductive, and besides, it has remarkably better stability in an aqueous solution than MSFs. These features enable C/MSF to be used as a stable electrode in aqueous electrolyte solutions. In addition, C/MSF exhibits a much higher rate of performance as an electrode of an electric double layer capacitor than conventional powdery electrodes, indicating that the C/MSF electrode has excellent electrical conductivity, which can be ascribed to the continuous film shape of C/MSF. Another noticea...
- Published
- 2011