Bisphenol-based resin, electrode, lead storage battery, production methods for these, and resin composition

Patent metadata

Field	Value
Publication number	US-9997782-B2
Application number	US-201715710859-A
Country	US
Kind code	B2
Filing date	Sep 21, 2017
Priority date	Apr 8, 2014
Publication date	Jun 12, 2018
Grant date	Jun 12, 2018

Abstract

An electrode includes an electrode layer including an electrode active material or a raw material of an electrode active material and a bisphenol-based resin, and a current collector supporting the electrode layer. The bisphenol-based resin is obtained by a reaction of (a) a bisphenol-based compound, (b) at least one selected from the group consisting of aminobenzenesulfonic acids and aminobenzenesulfonic acid derivatives, and (c) at least one selected from the group consisting of formaldehyde and formaldehyde derivatives, wherein a content of a structural unit that is obtained by the reaction of the component (a), the component (b) and the component (c) and also has a benzoxazine ring is 15 mass % or less. A production method for the electrode is also disclosed.

First claim

The invention claimed is:

1. An electrode, comprising:
an electrode layer comprising an electrode active material or a raw material of an electrode active material and a bisphenol-based resin having a benzoxazine ring; and
a current collector supporting the electrode layer, wherein
the bisphenol-based resin is obtained by a reaction of (a) a bisphenol-based compound, (b) at least one selected from the group consisting of aminobenzenesulfonic acids and aminobenzenesulfonic acid derivatives, and (c) at least one selected from the group consisting of formaldehyde and formaldehyde derivatives, and wherein
a content of a structural unit that is obtained by a reaction of the component (a), the component (b) and the component (c) and also has a benzoxazine ring is 15 mass % or less based on a total mass of the bisphenol-based resin.

2. The electrode according to claim 1 , wherein the structural unit is represented by the following general formula (I):

wherein in formula (I), X1 represents a divalent group, R11 and R12 each independently represent an alkali metal or a hydrogen atom, n1 represents an integer of 1 to 3, and a hydrogen atom that is directly bonded to a carbon atom constituting a benzene ring may be substituted with an alkyl group or a methylol group.

3. The electrode according to claim 1 , wherein a weight average molecular weight of the bisphenol-based resin is 30000 to 70000.

4. A lead storage battery comprising the electrode according to claim 1 .

5. An electrode, comprising:
an electrode layer comprising an electrode active material or a raw material of an electrode active material and a bisphenol-based resin having a benzoxazine ring; and
a current collector supporting the electrode layer, wherein
the bisphenol-based resin has at least one selected from the group consisting of a structural unit represented by the following general formula (III) and a structural unit represented by the following general formula (IV),
a content of a structural unit represented by the following general formula (I) is 15 mass % or less based on a total mass of the bisphenol-based resin,

in formula (III), X3 represents a divalent group, R31, R33 and R34 each independently represent an alkali metal or a hydrogen atom, R32 represents a methylol group, n31 represents an integer of 1 to 300, n32 represents an integer of 1 to 3, n33 represents 0 or 1,

in formula (IV), X4 represents a divalent group, R41, R43 and R44 each independently represent an alkali metal or a hydrogen atom, R42 represents a methylol group, n41 represents an integer of 1 to 300, n42 represents an integer of 1 to 3, n43 represents 0 or 1, and

in formula (I), X1 represents a divalent group, R11 and R12 each independently represent an alkali metal or a hydrogen atom, n1 represents an integer of 1 to 3, and a hydrogen atom that is directly bonded to a carbon atom constituting a benzene ring may be substituted with an alkyl group or a methylol group.

6. The electrode according to claim 5 , wherein a weight average molecular weight of the bisphenol-based resin is 30000 to 70000.

7. A lead storage battery comprising the electrode according to claim 5 .

8. An electrode, comprising:
an electrode layer comprising an electrode active material or a raw material of an electrode active material and a bisphenol-based resin having a benzoxazine ring; and
a current collector supporting the electrode layer, wherein
the bisphenol-based resin has a structure derived from a reaction of (a) a bisphenol-based compound, (b) at least one selected from the group consisting of aminobenzenesulfonic acids and aminobenzenesulfonic acid derivatives, and (c) at least one selected from the group consisting of formaldehyde and formaldehyde derivatives, and wherein
a content of a structural unit derived from a reaction of the component (a), the component (b) and the component (c) and also has a benzoxazine ring is 15 mass % or less based on a total mass of the bisphenol-based resin.

9. The electrode according to claim 8 , wherein the structural unit is represented by the following general formula (I):

wherein, in formula (I), X1 represents a divalent group, R11 and R12 each independently represent an alkali metal or a hydrogen atom, n1 represents an integer of 1 to 3, and a hydrogen atom that is directly bonded to a carbon atom constituting a benzene ring may be substituted with an alkyl group or a methylol group.

10. The electrode according to claim 8 , wherein a weight average molecular weight of the bisphenol-based resin is 30000 to 70000.

11. A production method for an electrode, comprising:
applying an electrode active material paste to a current collector; and
aging and drying the electrode active material paste, wherein the electrode active material paste includes a bisphenol-based resin having a benzoxazine ring obtained by a production method for a bisphenol-based resin, the production method comprising a step of reacting (a) a bisphenol-based compound, (b) at least one selected from the group consisting of aminobenzenesulfonic acids and aminobenzenesulfonic acid derivatives, and (c) at least one selected from the group consisting of formaldehyde and formaldehyde derivatives, to obtain a bisphenol-based resin, and wherein
a content of a structural unit that is obtained by a reaction of the component (a), the component (b) and the component (c) and also has a benzoxazine ring is 15 mass % or less based on a total mass of the bisphenol-based resin.

12. The production method for an electrode according to claim 11 , wherein the component (a) includes 2,2-bis(4-hydroxyphenyl)propane.

13. The production method for an electrode according to claim 11 , wherein the component (a) includes bis(4-hydroxyphenyl)sulfone.

14. The production method for an electrode according to claim 11 , wherein the structural unit is represented by the following general formula (I):

wherein, in formula (I), X1 represents a divalent group, R11 and R12 each independently represent an alkali metal or a hydrogen atom, n1 represents an integer of 1 to 3, and a hydrogen atom that is directly bonded to a carbon atom constituting a benzene ring may be substituted with an alkyl group or a methylol group.

15. The production method for an electrode according to claim 14 , wherein X1 represents isopropylidene group.

16. The production method for an electrode according to claim 14 , wherein X1 represents sulfonyl group.

17. The production method for an electrode according to claim 14 , wherein at least one selected from the group consisting of R11 and R12 include sodium or potassium.

18. The production method for an electrode according to claim 11 , wherein a weight average molecular weight of the bisphenol-based resin is 30000 to 70000.

19. The production method for an electrode according to claim 11 , wherein an amount of the component (b) is 0.5 to 1.3 mol with respect to

Assignees

• Hitachi Chemical Co Ltd
• Hitachi Chemical Co Ltd

Inventors

• Hara Kousuke
• Yamashita Takeshi
• Ueda Satoko
• Kogure Kouji

Classifications

• H01M4/622 Primary

  being polymers · CPC title

• H01M10/06

  Lead-acid accumulators (semi-lead accumulators H01M10/20) · CPC title

• C08G14/06

  and monomers containing hydrogen attached to nitrogen · CPC title

• H01M4/20

  of pasted electrodes · CPC title

• H01M2220/20

  Batteries in motive systems, e.g. vehicle, ship, plane · CPC title