Lithium cell and method of forming same
AssigneeTadiran Batteries Ltd.
InventorsHERZEL YAMIN, CHEN MENACHEM, DANY BAR-TOV
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Abstract
An electrochemical cell including an anode comprising a carbonaceous material, where the carbonaceous material is capable of reversibly incorporating lithium ions therein and lithium metal on the surface thereof, a cathode capable of reversibly incorporating therein lithium ions, and a non-aqueous electrolyte in contact with the anode and the cathode, where the ratio of the capacity to reversibly incorporate lithium ions of the cathode to the capacity to reversibly incorporate lithium ions in the form of LiC6 of the carbonaceous material of the anode is equal to or larger than 4.5:1.
Claims20
An electrochemical cell comprising:
- an anode comprising a carbonaceous material, said carbonaceous material is capable of reversibly incorporating lithium ions therein and lithium metal on the surface thereof;
- a cathode capable of reversibly incorporating therein lithium ions;
- and
- a non-aqueous electrolyte in contact with said anode and said cathode;
- wherein the ratio of the capacity to reversibly incorporate lithium ions of said cathode to the capacity to reversibly incorporate lithium ions in the form of LiC6 of said carbonaceous material of said anode is equal to or larger than 4.5:1.
An electrochemical cell comprising:
- an anode comprising an electrically conducting support member and a carbonaceous material attached to said support member, said carbonaceous material is capable of reversibly incorporating lithium ions therein and lithium metal on the surface thereof;
- a cathode capable of reversibly incorporating therein lithium ions;
- and
- a non-aqueous electrolyte in contact with said anode and said cathode;
- wherein prior to charging said cell, said cathode is lithiated by an amount of lithium ions that is equal to or larger than 4.5 times the capacity of said carbonaceous material of said anode to intercalate therein lithium ions in the form of LiC6.
A method for constructing an electrochemical cell, the method comprising the steps of:
- providing an anode comprising a carbonaceous material attached to a support member, said carbonaceous material is capable of reversibly incorporating lithium ions therein and lithium metal on the surface thereof;
- providing a cathode capable of reversibly intercalating therein lithium ions wherein in the cell's discharged state said cathode is lithiated by an amount of lithium ions that is equal to or larger than 4.5 times the capacity of said carbonaceous material of said anode to intercalate therein lithium ions in the form of LiC6;
- providing a non-aqueous electrolyte;
- assembling said cathode, said anode and said electrolyte in a housing to obtain said electrochemical cell.
Dependencies are inferred from the claim text.