| 초록 |
We report mesoporous carbon electrodes prepared using silica template, carbonization process under CH4 atmosphere, and subsequent silica removal for improved electrochemical energy storage and conversion in lithium-ion batteries, capacitors, and fuel cells. The as-synthesized carbon electrodes exhibit mesoporous structures with the narrow size distributions corresponding to the replication of the mesoporous SiO2 template. In particular, the meso-C-3 prepared by carbonization process under CH4 atmosphere for 3 h exhibits relatively much higher surface area of 635.07 m2 g-1 and pore diameter of ~3.13 nm with the narrow size distribution corresponding to the replication of the meso-SiO2. The meso-C-3 shows high charge capacity and high-rate performance during the Li intercalation due to relatively high surface areas and well-defined pores as a buffer to the local volume changes. The improved electrochemical double layer capacitance and oxygen reduction reaction activity of the meso-C-3 might be due to large accessible surface area and pore structure in the well-defined porous electrode. |
