Polymer electrolyte solvent for electrochemical cell
AssigneeMotorola, Inc.
InventorFrank R. Denton, III
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Abstract
An electrochemical cell (10) includes first and second electrodes (12) and (14) with an electrolyte system (26) disposed therebetween. The electrolyte system includes a polymeric support structure through which is dispersed an electrolyte active species in a solvent. The solvent comprises a poly(vinylidene fluoride) having a number average molecular weight of less than about 50,000 atomic mass units. Alternatively, the solvent may be a blend or copolymer of polyvinylidene fluoride and another solvent or polymer.
Claims27
An electrolyte system for a rechargeable electrochemical cell comprising a polymeric support structure for supporting an electrolyte active species dispersed therein, said electrolyte active species comprises an electrolyte salt dispersed in a solvent, wherein said solvent comprises poly(vinylidene fluoride) having a number average molecular weight of not greater than 50,000 atomic mass units.
An electrolyte for an electrochemical cell, said electrolyte comprising an electrolyte salt dispersed in a solvent, wherein said solvent comprises, by volume, at least 10% poly(vinylidene fluoride) having a number average molecular weight of not greater than 50,000 atomic mass units.
An electrochemical cell comprising:
- an anode;
- a cathode;
- and
- an electrolyte comprising an electrolyte salt dispersed in a solvent, wherein said solvent comprises poly(vinylidene fluoride) having a number average molecular weight of not greater than 50,000 atomic mass units.
An electrochemical cell as in claim 25, wherein the solvent comprises at least 10% by volume poly(vinylidene fluoride).
Dependencies are inferred from the claim text.