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US 2019/0157722 A1Published application
Non-aqueous solvent electrolyte formulations for energy storage devices
AssigneeMaxwell Technologies, Inc.
InventorsJoon Ho Shin, Hieu Minh Duong, Wilma Wong
Life of this patent
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Abstract
Provided herein are improved electrolyte formulations. The improved performance may be realized as improved discharge rate cycling, improved capacity, improved Coulombic efficiency, or improved capacity upon cycling.
Claims21
An energy storage device, comprising:
- a cathode comprising a cathode active material;
- an anode comprising an anode active material;
- a separator between the cathode and the anode;
- and
- an electrolyte comprising a lithium salt and a non-aqueous electrolyte solvent formulation comprising ethylene carbonate (EC) and an additional solvent selected from at least one of ethyl methyl carbonate (EMC), dimethylcarbonate (DMC) and propylene carbonate (PC), wherein the volume ratio of EC to the additional solvent is about 1:2 to about 1:4.
2 more elements
A method of forming an energy storage device, comprising:
- providing a housing,
- placing into the housing a cathode, an anode and a separator between the cathode and the anode, wherein at least one of the cathode and anode is free of solvent residue;
- and
- placing into the housing an electrolyte comprising a lithium salt and a non-aqueous electrolyte solvent formulation comprising ethylene carbonate (EC) and an additional solvent selected from at least one of ethyl methyl carbonate (EMC), dimethylcarbonate (DMC) and propylene carbonate (PC), wherein the volume ratio of EC to the additional solvent is about 1:2 to about 1:4.
1 more element
Dependencies are inferred from the claim text.