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Scaling relation between renormalized discharge rate and capacity in Na x CoO2 films
http://hdl.handle.net/2241/00131816
http://hdl.handle.net/2241/00131816f0539a76-8513-49d4-bff8-7f40395c7c3c
名前 / ファイル | ライセンス | アクション |
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APLM_3-10 (2.7 MB)
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Item type | Journal Article(1) | |||||
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公開日 | 2015-12-21 | |||||
タイトル | ||||||
タイトル | Scaling relation between renormalized discharge rate and capacity in Na x CoO2 films | |||||
言語 | ||||||
言語 | eng | |||||
資源タイプ | ||||||
資源 | http://purl.org/coar/resource_type/c_6501 | |||||
タイプ | journal article | |||||
著者 |
Yanagita, Ayumu
× Yanagita, Ayumu× Shibata, Takayuki× Kobayashi, Wataru× Moritomo, Yutaka |
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著者別名 |
小林, 航
× 小林, 航× 守友, 浩 |
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抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | Layered cobalt oxide, P2-Na x CoO2, is a prototypical cathode material for sodium-ion secondary battery. We systematically investigated the rate dependence of the discharge capacity (Q) in three thin films of Na 0.68CoO2 with different film thickness (d) and in-plane grain radius (r). With subtracting conventional voltage drop effect on Q, we derived an intrinsic rate dependence of Q. We found a scaling relation between the renormalized discharge rate (γ ≡ r 2/DT; D and T are the Na + diffusion constant and discharge time, respectively) and relative capacity (=Q/Q 0; Q 0 is the value at a low rate limit). The observed scaling relation is interpreted in terms of the Na + intercalation process at the electrolyte-Na x CoO2 interface and Na + diffusion process within Na x CoO2. | |||||
書誌情報 |
APL Materials 巻 3, 号 10, p. 106104, 発行日 2015-10 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2166-532X | |||||
DOI | ||||||
識別子タイプ | DOI | |||||
関連識別子 | 10.1063/1.4933236 | |||||
権利 | ||||||
権利情報 | © 2015 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License. | |||||
著者版フラグ | ||||||
値 | publisher | |||||
出版者 | ||||||
出版者 | AIP Publishing |