Doped manganese dioxides

• US 7,501,208 B2
• Filed: 06/01/2001
• Issued: 03/10/2009
• Est. Priority Date: 06/01/2001
• Status: Expired due to Fees

• Current Assignee: Energizer Brands, LLC (Energizer Holdings, Inc.)
• Original Assignee: Eveready Battery Company Incorporated (Energizer Holdings, Inc.)
• Inventors: Donne, Scott W., Devenney, Martin, Gorer, Alexander, Feddrix, Frank H.
• Primary Examiner(s): Weiner; Laura S
• Application Number:
  US10/296,899
• Publication Number:
  US 20030215712A1
• Time in Patent Office: 2,839 Days
• Field of Search: 429/224, 429/232, 429/129, 429/233, 429/220, 429/221, 429/223, 429/229, 429/231.5, 429/206, 423/599, 252/182.1
• US Class Current: 429/224
• CPC Class Codes: C01G 45/02 Oxides; Hydroxides
• CPC Class Codes: C01P 2002/52 containing elements as dopants
• CPC Class Codes: C01P 2002/54 one element only
• CPC Class Codes: C01P 2006/12 Surface area
• CPC Class Codes: C01P 2006/40 Electric properties
• CPC Class Codes: H01M 4/0438 by electrochemical processing electroless electrochemical plating C23C18/54
• CPC Class Codes: H01M 4/049 Manufacturing of an active layer by chemical means
• CPC Class Codes: H01M 4/24 Electrodes for alkaline accumulators
• CPC Class Codes: H01M 4/50 of manganese
• CPC Class Codes: H01M 4/525 of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
• CPC Class Codes: H01M 50/182 for cells with a collector centrally disposed in the active mass, e.g. Leclanché cells
• CPC Class Codes: H01M 6/40 Printed batteries , e.g. thin film batteries
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

An active manganese dioxide electrode material that exhibits improved electrochemical performances compared with conventional manganese dioxide materials includes at least one dopant. The doped manganese dioxide electrode materials may be produced by a wet chemical method (CMD) or may be prepared electrolytically (EMD) using a solution containing manganese sulfate, sulfuric acid, and a dopant, wherein the dopant is present in an amount of at least about 25 ppm.

Claims

1. A cathode of an alkaline battery, comprising a composition of electrolytic manganese dioxide and a doped manganese oxide corresponding to the formula Mn_1-xX_wO_y in which w is about 0.000023 to 0.0144, and y ranges from about 1.90 to 2.00, X is at least one dopant selected from the group consisting of:

B, Mg, Al, Si, P, Sc, Ti, V, Cr, Fe, Co, Ni, Cu, Zn, Ga, Ge, Sr, Y, Zr, Nb, Ru, Rh, Pd, Ag, In, Sn, Sb, Ba, Ce, Hf, Ta, Re, Os, Ir, Pt, Au and Bi, and in which the manganese, oxygen and the dopant are intermingled atomically, and wherein x is about 0.0046 to 0.0087.

2. The cathode of claim 1 further comprising a conductive material and wherein a combined weight of the conductive material, the electrolytic manganese dioxide and the doped manganese oxide is at least ninety weight percent of the cathode on a dry basis.

3. An alkaline battery, comprising the cathode of claim 1 and an anode comprising zinc.

4. An alkaline battery, comprising the cathode of claim 1 and an electrolyte comprising potassium hydroxide.