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US 12,738,528 B2Granted
Lithium-containing electrochemical cells, electrochemical systems, and related methods
AssigneeSion Power Corporation
InventorsChariclea Scordilis-Kelley, Yuriy V. Mikhaylik, Michael G. Laramie
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Abstract
Electrochemical cells and electrochemical systems containing lithium (e.g., lithium metal) are generally described.
Claims20
An electrochemical system, the system comprising:
- an electrochemical cell, comprising:
- a first electrode comprising a base electrode material layer comprising a first active electrode species, wherein the first active electrode species comprises lithium metal;
- a second electrode comprising a second active electrode species, wherein the second active electrode species comprises nickel, cobalt, and manganese, and wherein the second electrode comprises a binder comprising a fluorinated compound and conductive carbon;
- a separator;
- and
- an electrolyte, wherein the electrolyte comprises:
- a first solvent comprising a fluorinated carbonate;
- a second solvent comprising a carbonate, wherein a ratio of the fluorinated carbonate to the carbonate is greater than or equal to 5:95 and less than or equal to 95:1;
- and
- a lithium salt,
- wherein an anisotropic force is applied to the electrochemical cell, the anisotropic force comprising a component normal to a surface of the first electrode, and wherein the component normal defines a pressure of at least about 4.9 N/cm2.
8 more elements
A method of operating an electrochemical system, the method comprising:
- in an electrochemical cell, comprising:
- a first electrode comprising a base electrode material layer comprising a first active electrode species, wherein the first active electrode species comprises lithium metal;
- a second electrode comprising:
- a second active electrode species, wherein the second active electrode species comprises lithium, nickel, cobalt, and manganese;
- wherein the second electrode comprises a binder comprising a fluorinated compound and conductive carbon;
- and
- an electrolyte, wherein the electrolyte comprises:
- a first solvent comprising a fluorinated carbonate, a second solvent comprising a carbonate, wherein a ratio of the fluorinated carbonate to the carbonate is greater than 1:1 and less than or equal to 10:1;
- and
- a lithium salt,
- performing the steps of:
- charging the electrochemical cell at a charging rate over a first state of charge range having breadth of at least 2%,
- discharging the electrochemical cell at a discharging rate over a second state of charge range having a breadth of at least 2%,
- wherein the discharging rate is at least 2 times the charging rate.
11 more elements
An electrochemical system, the system comprising:
- an electrochemical cell, comprising:
- a first electrode comprising a base electrode material layer comprising a first active electrode species, wherein the first active electrode species comprises lithium metal, and where the first electrode comprises a protective layer adjacent to the base electrode material layer, wherein the protective layer comprises pores and has a thickness of less than 5 microns;
- a second electrode comprising a second active electrode species, wherein the second active electrode species comprises lithium, nickel, cobalt, and manganese;
- a separator;
- and
- an electrolyte, wherein the electrolyte comprises:
- a first solvent comprising a fluorinated carbonate;
- a second solvent comprising a carbonate, and
- a lithium salt,
- wherein an anisotropic force is applied to the electrochemical cell,
- the anisotropic force comprising a component normal to a surface of the first electrode, and wherein the component defines a pressure of at least about 4.9 N/cm2.
8 more elements
Dependencies are inferred from the claim text.