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US 4,052,539 AGranted
Electrochemical cell with a grahite intercalation compound cathode
AssigneeExxon Research & Engineering Co.
InventorsJoseph A. Shropshire, Gerald H. Newman
Life of this patent
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Abstract
A battery is disclosed having a nonaqueous electrolyte, an alkali metal anode and a cathode comprising a compound of grahite formed by reacting graphite with ClF.sub.3 and a Lewis acid fluoride of an element selected from B, Si, Ge, Sn, Pb, P, As, Sb, Bi, Ti, Zr, Hf, V, Nb and Ta.
Claims9
A battery comprising:
- a. an alkali metal anode;
- b. a cathode containing as the cathode-active material a compound of graphite formed by reacting ClF.sub.3 and a Lewis acid fluoride of an element selected from B, Si, Ge, Sn, Pb, P, As, Sb, Bi, Ti, Zr, Hf, V, Nb and Ta in the presence of liquid HF whereby said graphite compounds contain from about 30 wt. % to about 55 wt. % carbon;
- c. a nonaqueous electrolyte which does not chemically react with said anode or said cathode and which will permit the migration of ions from said anode-active material to said cathode-active material.
A battery comprising:
- a. a lithium anode;
- b. a cathode containing as the cathode-active material a compound of graphite formed by reacting excess Lewis acid fluoride and ClF.sub.3 in the presence of liquid HF, said Lewis acid fluoride being selected from BF.sub.3, PF.sub.5 and AsF.sub.5 ;
- and
- c. a nonaqueous electrolyte consisting essentially of a saturated solution of a lithium salt having a fluoroanion of the same element as the Lewis acid fluoride of the cathode-active material.
1 more element
Dependencies are inferred from the claim text.