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US 10,651,504 B2Granted
Electrolyte formulations for electrochemical cells containing a silicon electrode
AssigneeWildcat Discovery Technologies, Inc.
InventorsGang Cheng, Deidre Strand, Ye Zhu, Marissa Caldwell
Life of this patent
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Abstract
Additives to electrolytes that enable the formation of comparatively more robust SEI films on silicon anodes. The SEI films in these embodiments are seen to be more robust in part because the batteries containing these materials have higher coulombic efficiency and longer cycle life than comparable batteries without such additives.
Claims20
A lithium ion battery capable of multiple charge and discharge cycles comprising:
- a silicon based anode;
- and
- a liquid electrolyte solution comprising a soluble additive wherein the additive is represented by the chemical structural formula:
- where n≥1, the structure is linear, R2 is a substituted or unsubstituted alkyl group or a hydrogen and R1 is a substituted or unsubstituted acrylate.
1 more element
A lithium ion battery capable of multiple charge and discharge cycles comprising:
- a silicon based anode;
- and
- a liquid electrolyte solution comprising a soluble additive wherein the additive is represented by the chemical structural formula:
- where n≥1, the structure is linear, and R4 is a substituted or unsubstituted alkyl chain.
1 more element
A lithium ion battery capable of multiple charge and discharge cycles comprising:
- a silicon based anode;
- and
- a liquid electrolyte having one or more soluble additives included in a blend of solvents, wherein the additives are linear polymers with ethylene oxide functionality, and the blend comprises a high dielectric solvent and a low viscosity solvent.
Dependencies are inferred from the claim text.