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US 11,522,223 B2Granted
Silicon-based energy storage devices with phosphazene containing electrolyte additives
AssigneeEnevate Corporation
InventorsLiwen Ji, Benjamin Yong Park
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Abstract
Electrolytes and electrolyte additives for energy storage devices comprising phosphazene based compounds are disclosed. The energy storage device comprises a first electrode and a second electrode, wherein at least one of the first electrode and the second electrode is a Si-based electrode, a separator between the first electrode and the second electrode, an electrolyte comprising at least two electrolyte co-solvents, wherein at least one electrolyte co-solvent comprises a phosphazene based compound.
Claims12
An energy storage device comprising:
- a positive electrode;
- a negative electrode comprising an active material comprising silicon;
- a separator between the positive electrode and the negative electrode;
- and
- an electrolyte system comprising:
- a phosphazene based compound at a concentration of about 0.1%-10%;
- a linear carbonate at a concentration of about 30%-60%;
- a fluorine containing cyclic carbonate at a concentration of about 5%-40%;
- and
- a Li-containing salt at a concentration of 1.0-1.5 M.
7 more elements
Dependencies are inferred from the claim text.