TY - JOUR
T1 - Li ion cells comprising lithiated columnar silicon film anodes, TiS 2 cathodes and fluoroethyene carbonate (FEC) as a critically important component
AU - Elazari, Ran
AU - Salitra, Gregory
AU - Gershinsky, Gregory
AU - Garsuch, Arnd
AU - Panchenko, Alexander
AU - Aurbach, Doron
PY - 2012
Y1 - 2012
N2 - Si electrodes are the most important high capacity substitutes of Li metal and carbon anodes in high energy density Li ion batteries, including those based on sulfur or air cathodes. In this study we examined amorphous columnar structure silicon film anodes prepared by sputtering in rechargeable Li ion battery prototypes based on TiS2 cathodes. The choice of this cathode material enabled focusing on the examination of pre-lithiated Si films as anode candidates in alkyl carbonate electrolyte solutions. The effectiveness of fluoro-ethylene carbonate (FEC) as a co-solvent in alkyl carbonates/LiPF 6 solutions for good performance of silicon anodes was exhibited. Hundreds of cycles were demonstrated in full Li ion cells containing these components. The columnar morphology of these anodes is retained after 1000 cycles. Their surface chemistry, measured by EDS and XPS is discussed. The results of this work encourage further R&D efforts toward the use of amorphous silicon films as anodes in advanced rechargeable Li batteries.
AB - Si electrodes are the most important high capacity substitutes of Li metal and carbon anodes in high energy density Li ion batteries, including those based on sulfur or air cathodes. In this study we examined amorphous columnar structure silicon film anodes prepared by sputtering in rechargeable Li ion battery prototypes based on TiS2 cathodes. The choice of this cathode material enabled focusing on the examination of pre-lithiated Si films as anode candidates in alkyl carbonate electrolyte solutions. The effectiveness of fluoro-ethylene carbonate (FEC) as a co-solvent in alkyl carbonates/LiPF 6 solutions for good performance of silicon anodes was exhibited. Hundreds of cycles were demonstrated in full Li ion cells containing these components. The columnar morphology of these anodes is retained after 1000 cycles. Their surface chemistry, measured by EDS and XPS is discussed. The results of this work encourage further R&D efforts toward the use of amorphous silicon films as anodes in advanced rechargeable Li batteries.
UR - http://www.scopus.com/inward/record.url?scp=84873305924&partnerID=8YFLogxK
U2 - 10.1149/2.029209jes
DO - 10.1149/2.029209jes
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SN - 0013-4651
VL - 159
SP - A1440-A1445
JO - Journal of the Electrochemical Society
JF - Journal of the Electrochemical Society
IS - 9
ER -