Surface modification agents for lithium batteries
AssigneeUchicago Argonne, LLC
InventorsZonghai Chen, Khalil Amine, Ilias Belharouak
Life of this patent
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Abstract
An active material for an electrochemical device may have a surface modification agent that is a silane, organometallic compound, or a mixture of two or more of such compounds. Both negative and positive electrodes may be prepared from the surface modified active materials. The surface of an electrode may be modified by adding the surface modification agent to a non-aqueous electrolyte used in constructing a battery. An electrode or active material may be modified with a surface modification agent in either the gas phase or in solution. Slurries of the active agent may be prepared and the surface modification agent added, the slurry then be used to cast an electrode that is then dried.
Claims9
An active material for an electrochemical device wherein a surface of the active material is modified by a surface modification agent;
- wherein the surface modification agent is a silane, and the silane has Formula I, II, III, IV, or a mixture of any two or more thereof:
- wherein:
- X1, X2, X3 and X4 are independently —Cl or —Br;
- R1, R2, and R3 are independently a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an OR5 group, or a group of Formula V;
- R5 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
- and
- the surface modification agent is chloro[2-[2-(2-methoxyethoxy)ethoxy]ethoxy]dimethylsilane.
An electrochemical device comprising:
- a positive electrode;
- an negative electrode;
- and
- non-aqueous electrolyte;
- wherein the negative electrode and/or the positive electrode comprises a surface modification agent, and further wherein a surface of the negative electrode and/or the positive electrode is modified by the surface modification agent;
- wherein the surface modification agent is a silane, and the silane has Formula I, II, III, IV, or a mixture of any two or more thereof:
- wherein:
- X1, X2, X3 and X4 are independently —Cl or —Br;
- R1, R2, and R3 are independently a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, an OR5 group, or a group of Formula V;
- R5 is a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
- and
- the surface modification agent is chloro[2-[2-(2-methoxyethoxy)ethoxy]ethoxyl]dimethylsilane.
Dependencies are inferred from the claim text.