Osmotic and activity coefficients for five lithium salts in three non–aqueous solvents

Journal Article · Tue Dec 11 00:00:00 EST 2018 · Journal of Chemical Thermodynamics

DOI:https://doi.org/10.1016/j.jct.2018.12.016· OSTI ID:1571998

Xin, Nan ^[1]; Sun, Yanjun ^[1]; Radke, Clayton J. ^[2]; Prausnitz, John M. ^[2]

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1. Univ. of California, Berkeley, CA (United States); Xi'an Jiaotong Univ., Shaanxi (People's Republic of China)
2. Univ. of California, Berkeley, CA (United States)

To obtain osmotic coefficients, a classic static–view apparatus was used to measure the difference between the vapor pressure of a solvent and that of its salt solution at 25 °C. Vapor–pressure lowering was measured for solutions containing a lithium salt (LiCl, LiBr, LiNO₃, LiPF₆ and LITFSI) dissolved in a non–aqueous solvent (dimethyl carbonate, dimethyl sulfoxide and acetonitrile) that may be used in a lithium–ion battery. The osmotic–coefficient data are represented by Archer's extended Pitzer equation. As a result, mean ionic activity coefficients for the salts are calculated from the osmotic–coefficient data.

• Research Organization: Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
• Sponsoring Organization: USDOE Office of Science (SC)
• Grant/Contract Number: AC02-05CH11231
• OSTI ID: 1571998
• Journal Information: Journal of Chemical Thermodynamics, Journal Name: Journal of Chemical Thermodynamics Journal Issue: C Vol. 132; ISSN 0021-9614
• Publisher: Elsevier
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Activity coefficient
Archer–Pitzer equation
Lithium salts
Non–aqueous solvents
Osmotic coefficient