Effect of succinic anhydride as an electrolyte additive on electrochemical characteristics of silicon thin-film electrode

• Published in: Journal of power sources 2010-06, Vol.195 (11), p.3709-3714
• Main Authors: Han, Gi-Beom, Ryou, Myung-Hyun, Cho, Kuk Young, Lee, Yong Min, Park, Jung-Ki
• Format: Article
• Language: English
• Subjects: Additives; Anhydrides; Applied sciences; Carbonates; Direct energy conversion and energy accumulation; Electrical engineering. Electrical power engineering; Electrical power engineering; Electrochemical conversion: primary and secondary batteries, fuel cells; Electrodes; Electrolyte additive; Electrolytes; Ethylene; Exact sciences and technology; Liquids; Lithium battery; Radio-frequency magnetron sputtering; Silicon; Silicon thin-film electrode; Solid/electrolyte interphase; Succinic anhydride; Thin films
• ISSN: 0378-7753; 1873-2755
• DOI: 10.1016/j.jpowsour.2009.11.142

The effect of an electrolyte additive, succinic anhydride (SA), on the electrochemical performances of a silicon thin-film electrode, which is prepared by radio-frequency magnetron sputtering, is investigated. The introduction of SA into a liquid electrolyte consisting of ethylene carbonate/diethyl carbonate/1 M LiPF 6 significantly enhances the capacity retention and coulombic efficiency of the electrode. This improvement in the electrochemical performance of the electrode is attributed to modification of the solid/electrolyte interphase (SEI) layer by the introduction of SA. The differences in the characteristic properties of SEI layers, with or without SA, are explained by analysis with scanning electron microscopy, electrochemical impedance spectroscopy, and X-ray photoelectron spectroscopy.