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Quantitative analysis of cation mixing and local valence states in LiNixMn2−xO4 using concurrent HARECXS and HARECES measurements
http://hdl.handle.net/2237/25265
http://hdl.handle.net/2237/25265265d8d78-0fe2-4f00-ac5a-cea3d0d746f9
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
MICROSCOPY_v65_n3_2016_p253-262.pdf ファイル公開：2017/06/01 (1.4 MB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2016-12-19 | |||||
| タイトル | ||||||
| タイトル | Quantitative analysis of cation mixing and local valence states in LiNixMn2−xO4 using concurrent HARECXS and HARECES measurements | |||||
| 言語 | en | |||||
| 著者 |
Yamamoto, Yu
× Yamamoto, Yu× Kataoka, Kunimitsu× Akimoto, Junji× Tatsumi, Kazuyoshi× Kousaka, Takashi× Ohnishi, Jun× Takahashi, Teruo× Muto, Shunsuke |
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| 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 | |||||
| 権利 | ||||||
| 言語 | en | |||||
| 権利情報 | This is a pre-copyedited, author-produced version of an article accepted for publication in [Microscopy (Tokyo)] following peer review. The version of record [Microscopy (Tokyo). v.65, n.3, 2016, p.253-262] is available online at: http://dx.doi.org/10.1093/jmicro/dfw008 | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | lithium ion secondary batteries | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | positive electrode materials | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | cation mixing | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | site-specific EELS | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | electron channeling | |||||
| キーワード | ||||||
| 主題Scheme | Other | |||||
| 主題 | multiple linear regression | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | Cation mixing in positive electrode materials for rechargeable lithium ion batteries, LiNixMn2−xO4 (x = 0, 0.2, 0.5) and Li0.21Ni0.7Mn1.64O4−δ (denoted as x = 0.7), is analyzed by high-angular-resolution electron-channeling X-ray/electron spectroscopy (HARECXS/HARECES) techniques, using energy-dispersive X-ray spectroscopy and electron energy-loss spectroscopy. Mixing between the tetrahedral lithium sites and the octahedral transition metal sites is quantified, and the site-dependent valence states of the transition metals are examined. In the non-doped (x = 0) sample, Mn was found to occupy only octahedral sites as either Mn3+ or Mn4+. For x = 0.2–0.7, some of the nickel ions (6–13% depending on x) occupy tetrahedral anti-sites. All the nickel ions are in the divalent state, regardless of the occupation site. For x = 0.2 and 0.7, manganese ions occupy both octahedral and tetrahedral sites; those in the octahedral sites are tetravalent, while the tetrahedral sites contain a mixture of divalent and trivalent ions. For x = 0.5, manganese occupies only the octahedral sites, with all ions determined to be in the tetravalent state (within experimental accuracy). All the samples substantially satisfied the local charge neutrality conditions. This study demonstrates the feasibility of using HARECXS/HARECES for quantitative analysis of the atomic configuration and valence states in lithium manganese oxide spinel materials. | |||||
| 言語 | en | |||||
| 出版者 | ||||||
| 出版者 | Oxford University Press | |||||
| 言語 | en | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 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 | |||||
| 出版タイプ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1093/jmicro/dfw008 | |||||
| ISSN | ||||||
| 収録物識別子タイプ | PISSN | |||||
| 収録物識別子 | 2050-5698 | |||||
| 書誌情報 |
en : Microscopy (Tokyo) 巻 65, 号 3, p. 253-262, 発行日 2016-06 |
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| 著者版フラグ | ||||||
| 値 | author | |||||
| URI | ||||||
| 識別子 | http://doi.org/10.1093/jmicro/dfw008 | |||||
| 識別子タイプ | DOI | |||||
| URI | ||||||
| 識別子 | http://hdl.handle.net/2237/25265 | |||||
| 識別子タイプ | HDL | |||||
