@article{oai:air.repo.nii.ac.jp:00005474,
 author = {Eguchi, Takuya and Kanamoto, Yugo and Tomioka, Masahiro and Tashima, Daisuke and Kumagai, Seiji},
 issue = {2},
 journal = {Batteries},
 month = {},
 note = {Activated carbon (AC) with a very high specific surface area of >3000 m2 g-1 and a number　of course particles (average size: 75 μm) was pulverized by means of planetary ball milling under　di erent conditions to find its greatest performances as the active material of an electric double-layer　capacitor (EDLC) using a nonaqueous electrolyte. The variations in textural properties and particle　morphology of the AC during the ball milling were investigated. The electrochemical performance　(specific capacitance, rate and cyclic stabilities, and Ragone plot, both from gravimetric and volumetric　viewpoints) was also evaluated for the ACs milled with di erent particle size distributions. A trade-o 　relation between the pulverization and the porosity maintenance of the AC was observed within the　limited milling time. However, prolonged milling led to a degeneration of pores within the AC and a　saturation of pulverization degree. The appropriate milling time provided the AC a high volumetric　specific capacitance, as well as the greatest maintenance of both the gravimetric and volumetric　specific capacitance. A high volumetric energy density of 6.6 Wh L-1 was attained at the high-power　density of 1 kW L-1, which was a 35% increment compared with the nonmilled AC. The electrode　densification (decreased interparticle gap) and the enhanced ion-transportation within the AC pores,　which were attributed to the pulverization, were responsible for those excellent performances. It was　also shown that excessive milling could degrade the EDLC performances because of the lowered　micro- and meso-porosity and the excessive electrode densification to restrict the ion-transportation　within the pores.},
 title = {Efect of Ball Milling on the Electrochemical Performance of Activated Carbon with a Very High Specific Surface Area},
 volume = {６},
 year = {2020}
}