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Identifying the components of the solid–electrolyte interphase in Li-ion batteries
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Wang, Luning, Menakath, Anjali, Han, Fudong, Wang, Yi, Zavalij, Peter Y., Gaskell, Karen J., Borodin, Oleg, Iuga, Dinu, Brown, Steven P., Wang, Chunsheng, Xu, Kang and Eichhorn, Bryan W. (2019) Identifying the components of the solid–electrolyte interphase in Li-ion batteries. Nature Chemistry, 11 (9). pp. 789-796. doi:10.1038/s41557-019-0304-z ISSN 1755-4330.
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Official URL: http://dx.doi.org/10.1038/s41557-019-0304-z
Abstract
The importance of the solid–electrolyte interphase (SEI) for reversible operation of Li-ion batteries has been well established, but the understanding of its chemistry remains incomplete. The current consensus on the identity of the major organic SEI component is that it consists of lithium ethylene di-carbonate (LEDC), which is thought to have high Li-ion conductivity, but low electronic conductivity (to protect the Li/C electrode). Here, we report on the synthesis and structural and spectroscopic characterizations of authentic LEDC and lithium ethylene mono-carbonate (LEMC). Direct comparisons of the SEI grown on graphite anodes suggest that LEMC, instead of LEDC, is likely to be the major SEI component. Single-crystal X-ray diffraction studies on LEMC and lithium methyl carbonate (LMC) reveal unusual layered structures and Li+ coordination environments. LEMC has Li+ conductivities of >1 × 10−6 S cm−1, while LEDC is almost an ionic insulator. The complex interconversions and equilibria of LMC, LEMC and LEDC in dimethyl sulfoxide solutions are also investigated.
| Item Type: | Journal Article | ||||||||||||||||||||||||
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| Subjects: | Q Science > QD Chemistry T Technology > TK Electrical engineering. Electronics Nuclear engineering |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||||||||||||||||||
| Library of Congress Subject Headings (LCSH): | Electrolytes -- Conductivity, Lithium cells, Lithium ion batteries | ||||||||||||||||||||||||
| Journal or Publication Title: | Nature Chemistry | ||||||||||||||||||||||||
| Publisher: | Nature Publishing Group | ||||||||||||||||||||||||
| ISSN: | 1755-4330 | ||||||||||||||||||||||||
| Official Date: | September 2019 | ||||||||||||||||||||||||
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| Volume: | 11 | ||||||||||||||||||||||||
| Number: | 9 | ||||||||||||||||||||||||
| Page Range: | pp. 789-796 | ||||||||||||||||||||||||
| DOI: | 10.1038/s41557-019-0304-z | ||||||||||||||||||||||||
| Status: | Peer Reviewed | ||||||||||||||||||||||||
| Publication Status: | Published | ||||||||||||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||||||||||||||||||
| Date of first compliant deposit: | 28 August 2019 | ||||||||||||||||||||||||
| Date of first compliant Open Access: | 19 February 2020 | ||||||||||||||||||||||||
| RIOXX Funder/Project Grant: |
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