Lithium ion electrochemical cell
First Claim
1. An electrochemical cell comprising:
- an anode comprising a composition comprising a polymer binder and a lithium intercalation carbon material in the form of graphite particles that have a BET method specific surface area of about 6 to about 12 m2 /g, a crystallite height 2.265 g/cm3, wherein at least 90% (wt) of the graphite particles are less than 16 μ
m in size and wherein the polymer binder comprises about 80% (wt) or more of said composition;
a cathode; and
a non-aqueous electrolyte containing a solvent and salt that is interposed between the anode and cathode.
2 Assignments
0 Petitions
Accused Products
Abstract
Non-aqueous electrochemical cells with improved performance can be fabricated by employing anodes comprising a composition having graphite particles that have a BET method specific surface area of about 6 to about 12 m2 /g and a crystallite height Lc of about 100 nm to about 120 nm, and wherein at least 90% (wt) of the graphite particles are less than 16 μm in size; a cathode; and a non-aqueous electrolyte containing a solvent and salt that is interposed between the anode and cathode. When employed in an electrochemical cell, the anode can attain a specific electrode capacity of at least 300 mAhr/g. The electrochemical cell has a cycle life of greater than 1500 cycles, and has a first cycle capacity loss of only about 10% to about 15%.
-
Citations
20 Claims
-
1. An electrochemical cell comprising:
-
an anode comprising a composition comprising a polymer binder and a lithium intercalation carbon material in the form of graphite particles that have a BET method specific surface area of about 6 to about 12 m2 /g, a crystallite height 2.265 g/cm3, wherein at least 90% (wt) of the graphite particles are less than 16 μ
m in size and wherein the polymer binder comprises about 80% (wt) or more of said composition;a cathode; and a non-aqueous electrolyte containing a solvent and salt that is interposed between the anode and cathode. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 19, 20)
-
-
10. A method of fabricating an electrochemical cell comprising the steps of:
-
(a) providing an anode comprising a composition comprising a polymeric binder and a lithium intercalation carbon material in the form of graphite particles that have a BET method specific surface area of about 6 to about 12 m2 /g, a crystallite height Lc of about 100 nm to about 120 nm, or higher, and a density of about 2.25 to about 2.265 g/cm3 wherein at least 90% (wt) of the graphite particles are less than 16 μ
m in size and wherein the polymeric binder comprises about 80% (wt) or more of said composition;(b) providing a cathode; and (c) forming a non-aqueous electrolyte containing a solvent-containing and salt that is interposed between said anode and said cathode. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17, 18)
-
Specification