Sacrificial salts in Li-rich, defect anti-fluorite compounds in cathodes for prelithiation in lithium ion batteries
Systems and methods for batteries comprising a cathode, an electrolyte, and an anode, wherein sacrificial salts and prelithiation reagents are added to the cathode as functional additives for electrochemical prelithiation.
1. A battery, the battery comprising:
a cathode, an electrolyte solution, and an anode, wherein said cathode comprises an active material, a prelithiation agent in the form of one or more sacrificial lithium salts, and a polymer binder;
wherein said one or more sacrificial lithium salts comprises dilithium ketomalonate at a concentration of 5% by weight;
wherein said battery comprises a silicon-dominant anode having Si content of >50%; and wherein said Si is present as silicon particles.
2. The battery according to claim 1 , wherein the prelithiation agent in the form of one or more sacrificial lithium salts irreversibly provides lithium to the anode during charge.
3. A battery, the battery comprising:
a cathode, an electrolyte solution, and an anode, wherein said anode has been prelithiated using one or more sacrificial lithium salts;
wherein said cathode comprises an active material, a prelithiation agent in the form of said one or more sacrificial lithium salts, and a polymer binder;
wherein said one or more sacrificial lithium salts comprises dilithium ketomalonate at a concentration of 5% by weight;
wherein said battery comprises a silicon-dominant anode having Si content of >50%; and wherein said Si is present as silicon particles.
4. A method of forming a battery, the method comprising:
forming a battery comprising a cathode, an electrolyte solution, and an anode, the cathode comprising one or more sacrificial lithium salts; wherein said cathode is formed using, at least, the following steps:
cathode material is mixed to create a slurry
said sacrificial lithium salt is added to said slurry
said slurry is coated on metal foil; and
the coated metal foil is dried;
wherein said one or more sacrificial lithium salts comprises dilithium ketomalonate at a concentration of 5% by weight;
wherein said slurry also comprises a polymer binder;
wherein said battery comprises a silicon-dominant anode having Si content of >50%; and wherein said Si is present as silicon particles.
5. The method of claim 4 , wherein a first oxidation cycle of said battery is performed at higher than room temperature to reduce the oxidation potential of said one or more sacrificial lithium salts.