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Accession Number ADA581277
Title Role of Dissolved Gas in Ionic Liquid Electrolytes for Secondary Lithium Metal Batteries.
Publication Date Jan 2013
Media Count 25p
Personal Author J. K. Stark P. A. Kohl Y. Ding
Abstract The effect of dissolved gas on the reversibility of a Li/Li+ electrode in an ionic liquid electrolyte was investigated. Lithium metal is a potential anode in lithium batteries. The ionic liquid electrolyte was saturated with argon, nitrogen, oxygen, air, or carbon dioxide and the coulombic efficiency for the reduction and reoxidation of lithium metal was measured. Secondary ion mass spectroscopy (SIMS) was used to determine the thickness and composition of the solid electrolyte interphase (SEI) layer formed on the lithium metal. The coulombic cycling efficiency was highest with oxygen, nitrogen, and air. The coulombic efficiency was significantly lower with dissolved carbon dioxide. SIMS revealed that the SEI layer was made up of primarily LiF regardless of the gas used. The thickness of the SEI layer was the main determinant of cycling efficiency. A thinner SEI, observed with nitrogen and oxygen, lead to the highest coulombic efficiency, whereas, carbon dioxide produced a thick SEI which appeared to inhibit lithium deposition.
Keywords Anodes
Dissolved gases
Ionic liquid
Lithium batteries
Lithium metal

Source Agency Non Paid ADAS
NTIS Subject Category 97M - Batteries & Components
Corporate Author Georgia Inst. of Tech., Atlanta. School of Chemistry and Biochemistry.
Document Type Journal article
Title Note Journal article.
NTIS Issue Number 1325
Contract Number N/A

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