Uncharged positive electrode composition

Details Uncharged positive electrode composition Uncharged positive electrode composition

H - Electricity

01

M

319/82

H01M 4/36 (2006.01) H01M 10/39 (2006.01)

Patent

CA 1062775

ABSTRACT OF THE DISCLOSURE An uncharged positive-electrode composition contains particulate lithium sulfide, another alkali metal or alkaline earth metal compound other than sulfide, e.g. lithium carbide, and a transition metal powder. The com- position along with a binder, such as electrolytic salt or a thermosetting resin is applied onto an electrically con- ductive substrate to form a plaque. The plaque is assembled as a positive electrode within an electrochemical cell opposite to a negative electrode containing a material such as aluminum or silicon for alloying with lithium. During charging, lithium alloy is formed within the nega- tive electrode and transition metal sulfide such as iron sulfide is produced within the positive electrode. Excess negative electrode capacity over that from the transition metal sulfide is provided due to the electrochemical reaction of the other than sulfide alkali metal or alkaline earth metal compound.

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