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Effect of ethanol-assisted electrode fabrication on the performance of silicon anodes
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
Uppsala University, Disciplinary Domain of Science and Technology, Chemistry, Department of Materials Chemistry, Structural Chemistry.
2010 (English)In: Journal of Power Sources, ISSN 0378-7753, E-ISSN 1873-2755, Vol. 195, no 16, 5370-5373 p.Article in journal (Refereed) Published
Abstract [en]

The performance of high-silicon-content anodes was tested as a function of silicon particle-size (44 mu m, 1.8 mu m and 70-100 nm), surface pre-treatment and solvent chosen for anode preparation. Two simple procedures, leading to significant improvements in electrode performance are reported. First, pretreatment of nano-Si in ethanol which unexpectedly yields functionalised surfaces improving cycling stability. Second, the use of a 30:70 solution of ethanol and water to dissolve the CMC-binder for the electrode preparation boosts specific battery capacity. Ethanol pre-treatment of nano-Si also resulted in improved adhesion of the electrode to the current collector as well as in de-agglomeration of nano-Si powder. All these treatments improved capacity stability during cycling. Changes in surface chemistry of nano-Si before and after ethanol treatment have been analysed by XPS. A stable capacity of about 1630 mAh g(-1) was obtained after 25 cycles for an electrode containing 80% silicon using ethanol during electrode coating preparation.

Place, publisher, year, edition, pages
2010. Vol. 195, no 16, 5370-5373 p.
Keyword [en]
Li-ion batteries, Si-based anodes, XPS analysis, Nano-silicon, Ethanol treatment
National Category
Inorganic Chemistry
Research subject
Chemistry with specialization in Inorganic Chemistry
Identifiers
URN: urn:nbn:se:uu:diva-136435DOI: 10.1016/j.jpowsour.2010.03.042ISI: 000277868600024OAI: oai:DiVA.org:uu-136435DiVA: diva2:376936
Available from: 2010-12-13 Created: 2010-12-13 Last updated: 2017-12-11Bibliographically approved

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Urbonaite, SigitaEdström, Kristina

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