Insights into Electrolytic Pre‐Lithiation: A Thorough Analysis Using Silicon Thin Film Anodes
| العنوان: | Insights into Electrolytic Pre‐Lithiation: A Thorough Analysis Using Silicon Thin Film Anodes |
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| المؤلفون: | Lukas Haneke, Felix Pfeiffer, Peer Bärmann, Jens Wrogemann, Christoph Peschel, Jonas Neumann, Fabian Kux, Sascha Nowak, Martin Winter, Tobias Placke |
| المصدر: | Small. 19:2206092 |
| بيانات النشر: | Wiley, 2022. |
| سنة النشر: | 2022 |
| مصطلحات موضوعية: | Biomaterials, anodes, electrolysis, full cells, lithium ion batteries, pre lithiation, silicon, solid electrolyte interphases, General Materials Science, General Chemistry, Biotechnology |
| الوصف: | Pre lithiation via electrolysis, herein defined as electrolytic pre lithiation, using cost efficient electrolytes based on lithium chloride LiCl , is successfully demonstrated as a proof of concept for enabling lithium ion battery full cells with high silicon content negative electrodes. An electrolyte for pre lithiation based on amp; 947; butyrolactone and LiCl is optimized using boron containing additives lithium bis oxalato borate, lithium difluoro oxalate borate and CO2 with respect to the formation of a protective solid electrolyte interphase SEI on silicon thin films as model electrodes. Reversible lithiation in Si Li metal cells is demonstrated with Coulombic efficiencies CEff of 95 96 for optimized electrolytes comparable to 1 m LiPF6 EC EMC 3 7. Formation of an effective SEI is shown by cyclic voltammetry and X ray photoelectron spectroscopy XPS . electrolytic pre lithiation experiments show that notable amounts of the gaseous product Cl2 dissolve in the electrolyte leading to a self discharge Cl2 Cl amp; 8722; shuttle mechanism between the electrodes lowering pre lithiation efficiency and causing current collector corrosion. However, no significant degradation of the Si active material and the SEI due to contact with elemental chlorine is found by SEM, impedance, and XPS. In NCM111 Si full cells, the capacity retention in the 100th cycle can be significantly increased from 54 to 78 by electrolytic pre lithiation, compared to reference cells without pre lithiation of Si |
| وصف الملف: | application/pdf |
| تدمد: | 1613-6829 1613-6810 |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d269a1eeb16a36d1fd8b0c732101677b https://doi.org/10.1002/smll.202206092 |
| حقوق: | OPEN |
| رقم الأكسشن: | edsair.doi.dedup.....d269a1eeb16a36d1fd8b0c732101677b |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 16136829 16136810 |
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