Single-walled carbon nanotubes in alkaline electrochemical cell electrodes
AssigneeEnergizer Brands, LLC
InventorPhilip J. Slezak
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Abstract
Alkaline electrochemical cells are provided, wherein a conductive carbon is included in the cell's cathode in order to decrease resistivity of the cathode, so as to improve the discharge of the cell, particularly in high drain applications. The conductive carbon may comprise carbon nanotubes and/or graphene. Methods for preparing such cells are also provided.
Claims14
An electrochemical cell comprising:
- i) an electrode comprising i) single-walled carbon nanotubes (SWCNTs), ii) an active material which is an oxide, and iii) graphite;
- wherein the electrode comprises SWCNTs in a concentration of about 1 wt % relative to the total mass of the active material and the graphite;
- and
- ii) an electrolyte solution which comprises potassium hydroxide (KOH), sodium hydroxide (NaOH), lithium hydroxide (LiOH), magnesium hydroxide (Mg(OH)2), calcium hydroxide (Ca(OH)2), magnesium perchlorate (Mg(ClO4)2), magnesium chloride (MgCl2), or magnesium bromide (MgBr2).
An electrochemical cell comprising i) a cathode, said cathode comprising EMD, single-walled carbon nanotubes (SWCNTs), and expanded graphite, and said cathode having an oxide to carbon (O:C) ratio of 20:1-60:1, wherein the cathode comprises SWCNTs in a concentration of about 1 wt % relative to the total mass of the EMD and the expanded graphite;
- and ii) an electrolyte solution which comprises potassium hydroxide (KOH), sodium hydroxide (NaOH), lithium hydroxide (LiOH), magnesium hydroxide (Mg(OH)2), calcium hydroxide (Ca(OH)2), magnesium perchlorate (Mg(ClO4)2), magnesium chloride (MgCl2), or magnesium bromide (MgBr2).
Dependencies are inferred from the claim text.