Lithium ion electrochemical cell
AssigneeValence Technology, Inc.
InventorsJeremy Barker, Jeffrey Swoyer, J. Lee Morris, Wade Guindy, Frederik Flemming
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Abstract
Non-aqueous solid electrochemical cells with improved performance can be fabricated by employing intercalation based carbon anodes comprising a mixture of carbon particles having different morphologies and selected from platelet-type, microbead-type and/or fiber-type structures. The anodes exhibit good cohesion and adhesion characteristics. When employed in an electrochemical cell, the anode can attain a specific electrode capacity of at least 300 mAh/g. The electrochemical cell has a cycle life of greater than 1000 cycles, and has a first cycle capacity loss of only about 5-15%.
Claims24
An electrochemical cell comprising:
- an anode comprising a carbon mixture comprising carbon platelet particles and at least one carbon material selected from the group consisting of microbead particles and fibrous particles;
- a cathode;
- and
- a polymeric layer containing an electrolyte solution that is interposed between the anode and cathode.
A method of fabricating an electrochemical cell comprising the steps of:
- (a) providing an anode comprising a carbon mixture comprising carbon platelet particles and at least one carbon material selected from the group consisting of microbead particles and fibrous particles;
- (b) providing a cathode;
- and
- (c) forming a polymeric layer containing an electrolyte solution that is interposed between said anode and said cathode.
Dependencies are inferred from the claim text.