Electrolyte salts for nonaqueous electrolytes
AssigneeUchicago Argonne, LLC
InventorsKhalil Amine, Zhengcheng Zhang, Zonghai Chen
Life of this patent
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Abstract
Metal complex salts may be used in lithium ion batteries. Such metal complex salts not only perform as an electrolyte salt in a lithium ion batteries with high solubility and conductivity, but also can act as redox shuttles that provide overcharge protection of individual cells in a battery pack and/or as electrolyte additives to provide other mechanisms to provide overcharge protection to lithium ion batteries. The metal complex salts have at least one aromatic ring. The aromatic moiety may be reversibly oxidized/reduced at a potential slightly higher than the working potential of the positive electrode in the lithium ion battery. The metal complex salts may also be known as overcharge protection salts.
Claims31
An electrolyte comprising:
- an aprotic solvent;
- and
- a metal complex salt;
- wherein the metal complex salt is a complex of Formula (I), Formula (II), Formula (III), Formula IV, a diastereomer any of Formulas I, II, III, or IV thereof, or a mixture of any two or more thereof:
- further wherein;
- A is Al;
- A′ is P or As;
- each Z is independently O or S;
- each X′ is independently H, halogen, CN, NO2, alkyl, or haloalkyl;
- M is an electrochemically stable cation;
- x is 1, 2, or 3;
- R5, R6, R7 and R8 are individually a halogen;
- an unsubstituted or substituted alkyl group;
- an unsubstituted or substituted alkyl group;
- a unsubstituted or substituted haloalkyl group;
- an unsubstituted or substituted aryl group;
- a unsubstituted or substituted haloaryl group;
- a cyano group;
- or a nitro group;
- or
- two of R5, R6, R7 and R8, or two pairs of R5, R6, R7 and R8, join together as a group of Formula V;
- wherein R9 is absent, or is a C1-C10 alkyl, C1-C10 haloalkyl, C6-C20 aryl, or C6-C20 haloaryl.
An electrolyte comprising:
- an aprotic solvent;
- and
- a metal complex salt;
- wherein the metal complex salt comprises:
- or a regioisomer thereof, or a mixture of any two or more thereof.
An electrolyte comprising:
- an aprotic solvent;
- and
- a metal complex salt;
- wherein the metal complex salt comprises:
- or a regioisomer, or a mixture of any two or more thereof.
Dependencies are inferred from the claim text.