Improved Electrolytes for Lithium
Abstract
There has been a continuing effort to identify and develop chemistries that will satisfy the stringent MILSPEC requirements for a rechargeable lithium battery. Cell potentials exceeding 4.0 V present a difficult task to find electrolytes which are conductive and stable to oxidation at high potentials. In this study we selected four lithium salts and three solvents from which electrolytes were prepared and evaluated with respect to conductivity, electrochemical stability, and stability with aluminum (an issue because of its use as a current collector at the cathode). We have identified a conductive electrochemically stable electrolyte comprised of lithium tris-(trifluoromethanesulfonyl)method in a ternary solvent mixture of ethylene carbonate, dimethyl carbonate, and methyl formate as a viable candidate for a military electrolyte. We have also shown that a salt believed unstable with aluminum, lithium bis-(trifluoromethanesulfonyl)imide, is stable with aluminum, and is another candidate for a suitable electrolyte. jg p.3
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 01, 1995
- Accession Number
- ADA301953
Entities
People
- Charles W. Walker Jr.
Organizations
- United States Army Research Laboratory