| Item type |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2021-11-12 |
| タイトル |
|
|
タイトル |
Efect of Ball Milling on the Electrochemical Performance of Activated Carbon with a Very High Specific Surface Area |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
activated carbon |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
ball milling |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
electric double-layer capacitor |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
supercapacitor |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
electrode |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
specific capacitance |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
energy density |
| 主題 |
|
|
主題Scheme |
Other |
|
主題 |
power density |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
journal article |
| アクセス権 |
|
|
アクセス権 |
open access |
|
アクセス権URI |
http://purl.org/coar/access_right/c_abf2 |
| 作成者 |
Eguchi, Takuya
Kanamoto, Yugo
Tomioka, Masahiro
Tashima, Daisuke
Kumagai, Seiji
|
| 内容記述 |
|
|
内容記述タイプ |
Abstract |
|
内容記述 |
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. |
|
言語 |
en |
| 出版タイプ |
|
|
出版タイプ |
VoR |
|
出版タイプResource |
http://purl.org/coar/version/c_970fb48d4fbd8a85 |
| 書誌情報 |
Batteries
巻 ６,
号 2,
p. 22,
発行日 2020
|
| 収録物識別子 |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
2313-0105 |
| 出版者 |
|
|
出版者 |
MDPI |
| 関連情報 |
|
|
関連タイプ |
isIdenticalTo |
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|
識別子タイプ |
DOI |
|
|
関連識別子 |
https://doi.org/10.3390/batteries6020022 |
| 権利情報 |
|
|
権利情報 |
© 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/). |
riA_2021_2 (14.6 MB)
