| タイトル | リチウム電池用LiPF$_6$電解液の分解反応 |
| その他のタイトル | Decomposition reaction of LiPF_6 based electrolytes for lithium ion cells |
| DOI | info:doi/10.15017/16668 |
| 本文（外部サイト） | https://catalog.lib.kyushu-u.ac.jp/opac_download_md/16668/p281.pdf |
| 参考URL | http://hdl.handle.net/2324/16668 |
| 著者（日） | 川村, 哲也; 岡田, 重人; 山木, 準一 |
| 発行日 | 2010-03-09 |
| 発行機関など | 九州大学大学院総合理工学府 |
| 刊行物名 | 九州大学大学院総合理工学報告 |
| 巻 | 24 |
| 号 | 3 |
| 開始ページ | 281 |
| 終了ページ | 288 |
| 刊行年月日 | 2002-12 |
| 言語 | jpn |
| 内容記述 | The decomposition of LiPF$_6$ electrolytes with water was studied by measuring the water content after storage. The solvents used are ethylene carbonate (EC) + diethyl carbonate (DEC), EC + dimethyl carbonate (DMC), propylene carbonate (PC) + DEC and PC + DMC. The experimental results were in good agreement with $-d[{\rm H}_2{\rm O}]/dt = k [{\rm H}_2{\rm O}]^2 [{\rm LiPF}_6]$. We obtained rate constant (k) from this empirical equation and rate constant (k) increased in the order of EC+DMC < EC+DEC < PC+DMC < PC+DEC. This order is inverse proportion to order of dielectric constant of these solvents. Non-ionized LiPF$_6$ dissociates to PF$_5$ and LiF in organic solvents and PF$_5$ reacts with water. High dielectric constant solvent increases the ionization of LiPF$_6$. Therefore, the reaction with water is suppressed in high dielectric constant solvent. |
| キーワード | lithium ion battery; water; LiPF_6; electrolyte; rate constant; decomposition |
| 資料種別 | Departmental Bulletin Paper |
| 著者版フラグ | publisher |
| ISSN | 1346-7883 |
| NCID | AA1147319X |
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