ISSN:
1042-7147
Keywords:
polymer electrolytes
;
salt
;
phase diagram
;
Chemistry
;
Polymer and Materials Science
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Solid polymer electrolytes (SPE) have been identified as a class of materials which could enable the fabrication of high energy density solid state lithium rechargeable batteries which could meet the performance requirements for advanced portable electronic and automotive applications. In order to achieve this goal, novel SPE systems having high ionic conductivity and good mechanical properties at or near ambient temperature must be developed. Novel lithium salts believed to be useful in realizing this objective have recently been proposed. The thermal behavior of SPE systems based on high molecular weight poly(ethylene oxide) (PEO) and on two novel salts, the lithium bis(trifluoromethanesulfonyl)imide (LiTFSI) and the lithium tris(trifluoromethylsulfonyl)-methanide (LiTSFM) is reported and compared with the thermal behavior of the high molecular weight PEO-lithium trifluoromethane sulfonate (LiTFLT) SPE system. Phase diagrams for the PEO-LiTFSI and PEO-LiTFSM SPE systems have been established and are discussed in terms of their impact on SPE-based rechargeable lithium battery technologies. The use of a novel plasticizer in conjunction with the PEO-LiTFSI-based SPE system is reported and it is shown how this modifies the thermal behavior of the PEO-LiTFSI SPE system.
Additional Material:
8 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pat.1995.220060205
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