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Understanding the active formation of a cathode–electrolyte interphase (CEI) layer with energy level band bending for lithium-ion batteries
https://oist.repo.nii.ac.jp/records/2867
https://oist.repo.nii.ac.jp/records/2867fc8d3f1f-fd77-4ddc-a9ef-736e5fe7c522
名前 / ファイル | ライセンス | アクション |
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221215_MS (2.1 MB)
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Item type | 学術雑誌論文 / Journal Article(1) | |||||
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公開日 | 2022-12-15 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | Understanding the active formation of a cathode–electrolyte interphase (CEI) layer with energy level band bending for lithium-ion batteries | |||||
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 | |||||
著者(英) |
Kim, Taehoon
× Kim, Taehoon× Ono, Luis K.× Qi, Yabing |
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書誌情報 |
en : Journal of Materials Chemistry A 発行日 2022-11-22 |
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抄録 | ||||||
内容記述タイプ | Other | |||||
内容記述 | Cathode–electrolyte interphase (CEI) formation between the cathode and the electrolyte is a critical factor that determines the stability of lithium-ion batteries (LiBs). The CEI layer consists of various by-products (e.g., LiF, Li2CO3, ROLi, and ROCO2Li (R: alkyl group)) decomposed from redox reactions between the cathode and the electrolyte, which can lead to dramatic capacity fading and stability issues. Herein, we empirically identify the energy level band bending of a Ni-rich NMC cathode (i.e., Li(Ni0.5Mn0.3Co0.2)O2) with the visual evidence of Li+ transfer from the electrode to the CEI layer (adsorbate). Negatively charged elements tend to be present at the close surface of the cathode, while the positively charged Li+ migrates from the cathode to the CEI layer. Hence, a downward band bending could be depicted based on the work function and the energy level difference between the Fermi level (EF) and the valence band maximum (EVBM). Energy level alignment itself is likely to be the key process that leads to the active formation of unstable CEI layers on charge–discharge. | |||||
出版者 | ||||||
出版者 | Royal Society of Chemistry | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2050-7488 | |||||
ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 2050-7496 | |||||
DOI | ||||||
関連タイプ | isVersionOf | |||||
識別子タイプ | DOI | |||||
関連識別子 | info:doi/10.1039/D2TA07565B | |||||
権利 | ||||||
権利情報 | © 2022 The Royal Society of Chemistry | |||||
関連サイト | ||||||
識別子タイプ | URI | |||||
関連識別子 | https://pubs.rsc.org/en/content/articlelanding/2023/TA/D2TA07565B | |||||
著者版フラグ | ||||||
出版タイプ | AM | |||||
出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa |