Binder composition for non-aqueous secondary battery electrode

Patent metadata

Field	Value
Publication number	US-2016156039-A1
Application number	US-201615013127-A
Country	US
Kind code	A1
Filing date	Feb 2, 2016
Priority date	Apr 3, 2009
Publication date	Jun 2, 2016
Grant date	—

Abstract

A binder composition for a non-aqueous secondary battery electrode may comprise functional group-containing crosslinked resin microparticles produced by polymerizing: (A) at least one monomer selected from the group consisting of (a) a monomer having one ethylenically unsaturated group per molecule and also having a monofunctional or polyfunctional epoxy group, (b) a monomer having one ethylenically unsaturated group per molecule and also having a monofunctional or polyfunctional amide group, and (c) a monomer having one ethylenically unsaturated group per molecule and also having a monofunctional or polyfunctional hydroxy group; (B) at least one monomer selected from the group consisting of (d) a monomer having one ethylenically unsaturated group per molecule and also having an alkoxysilyl group and (e) a monomer having at least two ethylenically unsaturated groups per molecule; and (C) (k) a monomer which has an ethylenically unsaturated group and is different from the monomers (a) to (e).

First claim

1 . A non-aqueous secondary battery electrode comprising a binder composition that contains fine particles of a functional group-containing cross-linking resin, wherein the fine particles of a functional group-containing cross-linking resin are fine particles of the resin obtained by emulsification polymerization of monomers having an ethylenically unsaturated group with a radical polymerization initiator in water in the presence of a surfactant, wherein the monomers having an ethylenically unsaturated group contains:
(A) 0.1 to 20% by weight of at least one monomer that is selected from the group consisting of (a) a monomer having one ethylenically unsaturated group per molecule and also having one or more epoxy groups, (b) a monomer having one ethylenically unsaturated group per molecule and also having one or more-amide groups, and (c) a monomer having one ethylenically unsaturated group per molecule and also having one or more hydroxide groups; (B) 0.1 to 5% by weight of at least one monomer that is selected from the group consisting of (d) a monomer having one ethylenically unsaturated group per molecule and also having one or more alkoxysilyl groups, and (e) a monomer having two or more ethylenically unsaturated groups per molecule; and (C) 75 to 99.8% by weight of (k) a monomer which has an ethylenically unsaturated group and is different from the monomers (a) to (e), having an ethylenically unsaturated group contains at least (m) a monomer having one ethylenically unsaturated group per molecule and also having a C 8-18 alkyl group and/or (n) a monomer having one ethylenically unsaturated group per molecule and also having a cyclic structure, wherein the monomers (m) and (n) are included in 30 to 95% by weight in sum in total monomers having an ethylenically unsaturated group ((a) to (e) and (k)), wherein the monomer (a) is selected from at least one of glycidyl(meth)acrylate and 3,4-epoxy cyclohexyl(meth)acrylate; the monomer (b) is selected from at least one of (meth)acrylic amide, diacetone(meth)acrylate amide, N-methylol acrylic amide, N,N-di(methylol)acrylic amide and N-methylol-N-methoxymethyl(meth)acrylic amide; the monomer (c) is selected from at least one of 2-hydroxyethyl(meth)acrylate, 2-hydroxypropyl(meth)acrylate and 4-hydroxybutyl(meth)acrylate; the monomer (d) is selected from at least one of γ-methacryloxypropyltrimethoxysilane, γ-methacryloxypropyltriethoxysilane, γ-methacryloxypropyltributoxysilane, γ-methacryloxypropylmethyldimethoxysilane, γ-methacryloxypropylmethyldiethoxysilane, γ-acryloxypropyltrimethoxysilane, γ-acryloxypropyltriethoxysilane, γ-acryloxypropylmethyldimethoxysilane, γ-methacryloxymethyltrimethoxysilane, γ-acryloxymethyltrimethoxysilane, vinyltrimethoxysilane, vinyltriethoxysilane, vinyltributoxysilane, and vinylmethyldimethoxysilane; the monomer (e) contains allyl(meth)acrylate; the monomer (m) is selected from at least one of 2-ethylhexyl(meth)acrylate, lauryl(meth)acrylate, myristyl(meth)acrylate, cetyl(meth)acrylate and stearyl(meth)acrylate; and the monomer (n) is selected from at least one of styrene, α-methyl styrene, 2-methyl styrene, cyclohexyl(meth)acrylate, isobonyl(meth)acrylate, benzyl(meth)acrylate and phenoxyethyl(meth)acrylate.

2 . The non-aqueous secondary battery electrode of claim 1 , wherein the composition further comprises (D) anon-cross-linked compound that is selected from the group consisting of a non-cross-linked epoxy group-containing compound, a non-cross-linked amide group-containing compound, a non-cross-linked hydroxide group-containing compound, and a non-cross-linked oxazoline group-containing compound.

3 . The non-aqueous secondary battery electrode of claim 1 , wherein the monomers (A) constitute 1 to 15% by weight of the composition.

4 . The non-aqueous secondary battery electrode of claim 1 , wherein the monomers (A) constitute 2 to 10% by weight of the composition.

5 . The non-aqueous secondary battery electrode of claim 1 , wherein the monomers (B) constitute 0.5 to 3% by weight of the composition.

6 . The non-aqueous secondary battery electrode of claim 1 , wherein the monomers having an ethylenically unsaturated group further comprise at least one keto group-containing ethylenically unsaturated monomer, which constitutes 0.1 to 10% by weight with respect to the total monomers having an ethylenically unsaturated group ((a) to (e) and (k)) in the composition.

7 . The non-aqueous secondary battery electrode of claim 6 , wherein the at least one keto group-containing ethylenically unsaturated monomer constitutes 1 to 8% by weight with respect to the total monomers having an ethylenically unsaturated group ((a) to (e) and (k)) in the composition.

8 . The non-aqueous secondary battery electrode of claim 6 , wherein the at least one keto group-containing ethylenically unsaturated monomer constitutes 3 to 7% by weight with respect to the total monomers having an ethylenically unsaturated group ((a) to (e) and (k)) in the composition.

9 . The non-aqueous secondary battery electrode of claim 6 , wherein the at least one keto group-containing ethylenically unsaturated monomer comprises diacetone(meth)acrylic amide.

10 . The non-aqueous secondary battery electrode of claim 1 comprising:
i) an electrode-active material;
ii) a conductive auxiliary agent;
iii) a binder comprising the binder composition; and
iv) a current collector, wherein the binder attaches the electrode-active material and the conductive auxiliary agent to the current collector.

11 . A non-aqueous secondary battery comprising:
a non-aqueous secondary battery electrode comprising a binder composition that contains fine particles of a functional group-containing cross-linking resin, wherein the fine particles of a functional group-containing cross-linking resin are fine particles of the resin obtained by emulsification polymerization of monomers having an ethylenically unsaturated group with a radical polymerization initiator in water in the presence of a surfactant, wherein the monomers having an ethylenically unsaturated group contains: (A) 0.1 to 20% by weight of at least one monomer that is selected from the group consisting of (a) a monomer having one ethylenically unsaturated group per molecule and also having one or more epoxy groups, (b) a monomer having one ethylenically unsaturated group per molecule and also having one or more amide groups group, and (c) a monomer having one ethylenically unsaturated group per molecule and also having one or more hydroxide groups; (B) 0.1 to 5% by weight of at least one monomer that is selected from the group consisting of (d) a monomer having one ethylenically unsaturated group per molecule and also having one or more alkoxysilyl groups, and (e) a monomer having two or more ethylenically unsaturated groups per molecule; and (C) 75 to 99.8% by weight of (k) a monomer which has an ethylenically unsaturated group and is different from the monomers (a) to (e), having an ethylenically unsaturated group contains at least (m) a monomer having one ethylenically unsaturated group per molecule and also having a C 8-18 alkyl group and/or (n) a monomer having one ethylenically unsaturated group per molecule and also having a cyclic structure, wherein the monomers (m) and (n) are included in 30 to 95% by weight in sum in total monomers having an ethylenically unsaturated group ((a) to (e) and (k)), wherein the monomer (a) is selected from at least one of glycidyl(meth)acrylate and 3,4-epoxy cyclohexyl(meth)acrylate; the monomer (b) is selected from at least one of (meth)acrylic amide, diacetone(meth)acrylate amide, N-methylol acrylic amide, N,N-di(methylol) acrylic amide and N-methylol-N-methoxymethyl(meth)acry

Assignees

• Toyo Ink Sc Holdings Co Ltd
• Toyocolor Co Ltd

Inventors

• Kinoshita Sachiko
• Yokoyama Hiromi
• Koike Takaaki
• Miyajima Koichiro
• Moroishi Yasuyuki
• Ikeda Shingo

Classifications

• H01M10/0525

  Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries · CPC title

• H01M4/622 Primary

  being polymers · CPC title

• H01M2220/30

  Batteries in portable systems, e.g. mobile phone, laptop · CPC title

• H01M4/13

  Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof · CPC title

• Y02E60/13

  Energy storage using capacitors · CPC title