2022 年 1 巻 2 号 p. 50-58
The key features of pulverized graphite for use in electric double layer capacitors (EDLCs) are highlighted. Pulverized graphite is produced by mechanochemical processing of natural graphite using a planetary ball mill. The crystallinities and porosities of the obtained carbon materials can be controlled by tuning the milling conditions. Because of their high electrical conductivities and specific surface areas, pulverized graphites are expected to be suitable as electrode materials in EDLCs. In addition, because of their mesopore-rich structures and high electrode densities, they have better volumetric capacitances and rate capabilities than those of conventional microporous activated carbons. Their long-term stability at high voltages is comparable or superior to those of the latter materials.
