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説明
The temperature dependence of sodium ion diffusion coefficient (D) of NaxCoO2 is extensively investigated in the temperature range of 303≤T≤349 K using electrochemical impedance spectroscopy. The magnitude of D is found to be (0.7–1.9)×10-11 cm2/s (0.54≤x≤0.85) at 303 K, which is comparable to that of LiCoO2. The activation energy (EaD) of D gradually increases from 0.32 at x=0.54 to 0.51 eV at x=0.85. The activation energy (EaR) of charge-transfer resistance (Rct) also increases from 0.34 at x=0.54 to 0.59 eV at x=0.85. These behaviors are ascribed to an increase in potential barrier due to the decrease in interlayer distance (d).
収録刊行物
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- Applied physics express : APEX
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Applied physics express : APEX 6 (9), 097101-, 2013-09
Tokyo : Japan Society of Applied Physics
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詳細情報 詳細情報について
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- CRID
- 1523669553308243840
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- NII論文ID
- 10031199882
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- NII書誌ID
- AA12295133
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- ISSN
- 18820778
- 18820786
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- NDL書誌ID
- 024864108
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- 本文言語コード
- en
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- NDL 雑誌分類
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- ZM35(科学技術--物理学)
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- データソース種別
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