Zinc anode composition

Patent metadata

Field	Value
Publication number	US-2017358793-A1
Application number	US-201515521223-A
Country	US
Kind code	A1
Filing date	Oct 23, 2015
Priority date	Oct 23, 2014
Publication date	Dec 14, 2017
Grant date	—

Abstract

An alkaline electrochemical cell, preferably a zinc/air cell which includes a container; a negative electrode, a positive electrode, wherein said negative electrode and said positive electrode are disposed within the container, and an alkaline electrolyte, wherein the negative electrode comprises zinc, a branched chain fluorosurfactant, barium sulfate (and, more specifically, amino- and/or epoxy-funcationalized barium sulfate) and nano sized zinc oxide. The negative electrode composition supports high zinc to electrolyte weight ratios.

First claim

1 - 21 . (canceled)

21 . An alkaline electrochemical cell, comprising:
a container; a negative electrode, a positive electrode, wherein said negative electrode and said positive electrode are disposed within the container, and an aqueous alkaline electrolyte, wherein the negative electrode comprises zinc and functionalized barium sulfate.

22 . The cell according to claim 21 , wherein the anode further comprises a fluorosurfactant.

23 . The cell according to claim 22 , wherein said fluorosurfactant is a sulfotricarballylate.

24 . The cell according to claim 22 wherein a formula for said fluorosurfactant is selected from (a) or (b):

where the groups Z i (Z 1 ,Z 2 , and Z 3 ) are, independently of one another, branched or unbranched alkyl groups or groups of the structure R i (A(CR 1 R 2 ) ci -(CR 3 R 4 ) c′i di-, where the respective indices ci and c′i are, independently of one another, 0-10, and di=0-5, where R; is a branched or unbranched, fluorine-containing alkyl radical, R 1 to R 4 are, independently of one another, hydrogen or a branched or unbranched alkyl group, ci and c′i are not simultaneously 0, and A=0, S and/or N, Yi is an anionic polar group and Y2 is a hydrogen atom, or vice versa, X is a cation, and at least one of the groups Zi is a group of the structure Ri(A(CR 1 R 2 ) ci -(CR 3 R 4 ) c′i) di-; a

where Z 1 ═Z 2 ═Z 3 ═F 3 C(CF 2 )(CH 2 )(O(CH 2 CHCH 2 CH3)).

25 . The cell according to claim 24 , wherein the anode further includes zinc oxide, and wherein said zinc oxide is nano-sized.

26 . The cell according to claim 25 , wherein each said fluorinated end groups comprises F 3 C(CF 2 ) 2 or F 3 C(CF 2 ).

27 . The cell according to claim 25 , wherein said fluorinated end group is identical.

28 . The cell according to claim 25 , wherein the functionalized barium sulfate comprises at one of: an amino group and an epoxide group.

29 . The cell according to claim 21 , wherein the positive electrode is an air electrode.

30 . The cell according to claim 21 , wherein the functionalized barium sulfate comprises at least one of: an amino group and an epoxide group.

31 . The cell according to claim 21 , the barium sulfate is provided at a concentration of no greater than 0.2 weight percent of the anode mixture.

32 . The cell according to claim 31 , wherein the barium sulfate further comprises a functional group selected from: an amino group, an epoxide group and combinations thereof.

33 . The cell according to claim 21 , wherein the anode further includes zinc oxide, and wherein said zinc oxide is nano-sized.

34 . The cell according to claim 33 , wherein the functionalized barium sulfate comprises at least one of: an amino group and an epoxide group.

35 . The cell according to claim 33 , wherein the functionalized barium sulfate comprises at least one of: an amino group and an epoxide group.

36 . The cell according to claim 21 , wherein the weight ratio of zinc to electrolyte is greater than 3.6.

37 . The cell according to claim 21 , wherein the positive electrode comprises manganese dioxide.

Assignees

• Energizer Brands Llc

Inventors

• Marple Jack W

Classifications

• H01M4/5825

  Oxygenated metallic salts or polyanionic structures, e.g. borates, phosphates, silicates, olivines · CPC title

• C07C69/34

  Esters of acyclic saturated polycarboxylic acids having an esterified carboxyl group bound to an acyclic carbon atom · CPC title

• H01M12/06

  with one metallic and one gaseous electrode · CPC title

• C07C69/63

  of saturated acids · CPC title

• C01G9/02

  Oxides; Hydroxides · CPC title