期刊
ELECTROCHIMICA ACTA
卷 308, 期 -, 页码 418-425出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2019.03.202
关键词
Silicon anode; Capacity fading; Lithium-ion battery; Solid electrolyte interface; Capacity loss; Theoretical model
资金
- National Council of Scientific and Technological Research of Argentina (CONICET)
- Secretariat of Science and Technology of National University of Cordoba (SECyT-UNC)
- Fund for Scientific and Technological Research (FONCyT) [SECyT-UNC 33820180100076CB, PIO CONICET-YPF 3855/15, PID CONICET 11220150100624, PICT BID-FONCyT 2015-1605]
- SNCAD-MinCyT, Argentina
Many efforts in the area of renewable energies are focused in the development of batteries of electrochemical cells to store energy fulfilling the requirements of high energy and power density. Electrochemical cells based on Li-ions are able to satisfy the requirements of high energy and power density. In general, cell electrode materials based on intermetallic and conversion compounds possess higher capacity to store Li -ions than those based on intercalation compound. Among intermetallic materials, silicon is a very attractive material for anodes of Li -ion cells, since it has a very high gravimetric capacity (3572 m Ahg(-1)) compared to graphite (372 m Afig(-1)), being graphite an intercalation material and the most common anode in Li -ion cells. However, the main problem associated to these intermetallic and conversion materials is capacity fading. In this work it is shown how the capacity fading of electrodes based on silicon can be theoretically described by considering a simple model for the solid electrolite interface, where the active surface of the electrode is allowed to increase during the process of lithiation and delithiation. (C) 2019 Elsevier Ltd. All rights reserved.
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