Electrodes for lithium ion batteries using polysilazanes ceramic with lithium
AssigneeDow Corning Corporation
InventorsJeffery R. Dahn, Alf M. Wilson, Weibing Xing, Gregg A. Zank
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Abstract
A lithium ion battery electrode formed by the pyrolysis of a silazane polymer followed by introducing lithium ions. These electrodes can be used to form batteries with large capacities, low irreversible capacity, high density and good safety behavior.
Claims19
A method of forming an electrode material for a lithium ion battery comprising:
- (A) pyrolyzing a composition comprising a silazane polymer to form a ceramic material;
- and
- (B) introducing lithium ions into the ceramic material to form an electrode material.
In a rechargeable lithium ion battery, the improvement comprising:
- an anode which comprises a material formed by:
- (A) pyrolyzing a composition comprising a silazane polymer to produce a ceramic material;
- and
- (B) introducing lithium ions into the ceramic material to form an anode.
An electrode material for a lithium ion battery comprising a material of the structure:
- SiO.sub.x C.sub.y N.sub.z
- wherein x=0 to 4, y=0 to 1000 and Z=0 to 40 and wherein lithium ions are incorporated therein.
In a method of making a rechargeable lithium ion battery, the improvement comprising making an anode by a process comprising:
- (A) pyrolyzing a composition comprising a silazane polymer to produce a ceramic material;
- and
- (B) introducing lithium ions into the ceramic material to form an anode.
Dependencies are inferred from the claim text.