Analysis of surface films on lithium in various organic electrolytes

Autor: T. Ijuuin, Shoichiro Mori, Asao Kominato, Hitoshi Asahina, Eiki Yasukawa, N. Sato
Rok vydání: 1997
Předmět:
Zdroj: Journal of Power Sources. 68:471-475
ISSN: 0378-7753
Popis: The surface films formed on lithium metal in ethylene carbonate (EC) + dimethyl carbonate (DMC) containing LiPF 6 , LiClO 4 and LiN(SO 2 CF 3 ) 2 electrolytes were analysed by using Auger electron spectroscopy (AES), temperature-programmed decomposition mass spectrography (TPD-MS), FT-IR, ion chromatography (IC) and atomic adsorption spectroscopy (AAS). The morphology of the film was observed by using scanning electron microscopy (SEM). The film formed in the LiPF 6 solution exhibited spherical morphology and was found to contain LiF, lithium oxide compounds (most of which seems to be inorganic), (CH 2 OCO 2 Li) 2 and CH 3 OCO 2 Li. The films in LiClO 4 and LiN(SO 2 CF 3 ) 2 were dendritic and contained the lithium oxide compounds, (CH 2 OCO 2 Li) 2 and CH 3 OCO 2 Li.
Databáze: OpenAIRE