Composite membrane, preparing method thereof, negative electrode structure including the composite membrane, and lithium secondary battery including the negative electrode structure

Patent metadata

Field	Value
Publication number	US-2017093002-A1
Application number	US-201615185806-A
Country	US
Kind code	A1
Filing date	Jun 17, 2016
Priority date	Sep 25, 2015
Publication date	Mar 30, 2017
Grant date	—

Abstract

A composite membrane including an organic membrane including a plurality of through holes, and a plurality of ion conductive inorganic material particles in the through holes, wherein a contact angle of the composite membrane or the ion conductive inorganic material particles is about 30° to about 90°.

First claim

What is claimed is:

1 . A composite membrane comprising:
an organic membrane comprising a plurality of through holes and a plurality of ion conductive inorganic material particles in the through holes, wherein a contact angle of the composite membrane or the ion conductive inorganic material particles is about 30° to about 90°.

2 . The composite membrane of claim 1 , wherein the contact angle of the composite membrane or the plurality of ion conductive inorganic material particles is about 40° to about 85°.

3 . The composite membrane of claim 1 , wherein a hydrophobic coating membrane is on at least a portion of the plurality of ion conductive inorganic material particles.

4 . The composite membrane of claim 3 , wherein the hydrophobic coating membrane is disposed on a surface of the plurality of ion conductive inorganic material particles that is not exposed through a surface of the composite membrane.

5 . The composite membrane of claim 1 , wherein a surface of the composite membrane comprises:
a sea-island structure, in which the conductive inorganic material particles are discontinuously arranged in a continuous organic membrane, or an alternately aligned structure, in which a cross-section of the composite membrane comprises the organic membrane that alternates with the ion conductive inorganic material particles.

6 . The composite membrane of claim 1 , wherein the plurality of ion conductive inorganic material particles embedded in the organic membrane are arranged as a monolayer.

7 . The composite membrane of claim 1 , wherein the organic membrane comprises one or more selected from a homopolymer, a block copolymer, and a random copolymer.

8 . The composite membrane of claim 3 , wherein
the hydrophobic coating membrane comprises a condensation reaction product of at least one selected from compounds represented by Formula 1:

wherein in Formula 1,
R 1 to R 3 are each independently selected from a substituted or unsubstituted C1-C20 alkyl group, a substituted or unsubstituted C1-C20 alkoxy group, a substituted or unsubstituted C2-C20 alkenyl group, a substituted or unsubstituted C2-C20 alkynyl group, a substituted or unsubstituted C6-C20 aryl group, a substituted or unsubstituted C7-C20 arylalkyl group, a substituted or unsubstituted C6-C20 aryloxy group, a substituted or unsubstituted C2-C20 heteroaryl group, a substituted or unsubstituted C2-C20 heteroaryloxy group, a substituted or unsubstituted C3-C20 heteroarylalkyl group, and a substituted or unsubstituted C2-C20 heterocyclic group, or a halogen atom, and
R 4 is hydrogen, a substituted or unsubstituted C1-C20 alkyl group, or a substituted or unsubstituted C6-C20 aryl group.

9 . The composite membrane of claim 8 , wherein the compound represented by Formula 1 is one or more selected from iso-butyl trimethoxysilane, octyl trimethoxysilane, propyl trimethoxysilane, decyl trimethoxysilane, dodecyl trimethoxysilane, octadecyl trimethoxysilane, 3-methacryloxypropyl trimethoxysilane, n-octadecyl triethoxysilane, 1H, 1H, 2H, 2H-perfluorooctyl triethoxysilane, and 3-mercaptopropyl trimethoxysilane.

10 . The composite membrane of claim 8 , wherein an amount of the condensation reaction product of at least one selected from the compounds represented by Formula 1 is about 0.1 parts by weight to about 30 parts by weight, based on 100 parts by weight of the plurality of ion conductive inorganic material particles.

11 . The composite membrane of claim 1 , wherein the plurality of ion conductive inorganic material particles are in a form of a single particle without a grain boundary between the ion conductive inorganic material particles.

12 . The composite membrane of claim 1 , wherein an amount of the plurality of ion conductive inorganic material particles is about 10 parts by weight to about 90 parts by weight, based on a total of 100 parts by weight of the composite membrane.

13 . The composite membrane of claim 1 , wherein the plurality of ion conductive inorganic material particles are glassy active material ion conductors, amorphous active material ion conductors, ceramic active material ion conductors, glass-ceramic active material ion conductors, or a combination thereof.

14 . The composite membrane of claim 1 , wherein the plurality of ion conductive inorganic material particles are one or more selected from Li 1+x+y Al x Ti 2-x Si y P 3-y O 12 (wherein 0<x<2 and 0≦y<3), BaTiO 3 , Pb(Zr, Ti)O 3 , Pb 1-x La x Zr 1-y Ti y O 3 (wherein 0≦x<1 and 0≦y<1), Pb(Mg 3 Nb 2/3 )O 3 —PbTiO 3 , HfO 2 , SrTiO 3 , SnO 2 , CeO 2 , Na 2 O, MgO, NiO, CaO, BaO, ZnO, ZrO 2 , Y 2 O 3 , Al 2 O 3 , TiO 2 , SiO 2 , SiC, Li 3 PO 4 , Li x Ti y (PO 4 ) 3 (wherein 0<x<2 and 0<y<3), Li x Al y Ti z (PO 4 ) 3 (wherein 0<x<2, 0<y<1, and 0<z<3), Li 1+x+y (Al, Ga) x (Ti, Ge) 2-x Si y P 3-y O 12 (wherein 0≦x≦1 and 0≦y≦1), Li x La y TiO 3 (wherein 0<x<2 and 0<y<3), Li x Ge y P z S w (wherein 0<x<4, 0<y<1, 0<z<1, and 0<w<5), Li x N y (wherein 0<x<4 and 0<y<2), Li x Si y S x (wherein 0<x<3, 0<y<2, and 0<z<4), Li x P y S z (wherein 0<x<3, 0<y<3, and 0<z<7), Li 2 O, LiF, LiOH, Li 2 CO 3 , LiAlO 2 , Li 2 O—Al 2 O 3 —SiO 2 —P 2 O 5 —TiO 2 —GeO 2 , Li 3+x La 3 M 2 O 12 (wherein 0≦x<10 and M=Te, Nb, or Zr), and a combination thereof.

15 . The composite membrane of claim 1 , wherein the organic membrane comprises a polymer, which is a moisture barrier and a gas barrier.

16 . The composite membrane of claim 1 , wherein the organic membrane comprises a polymerization product of a polymerizable non-aqueous floating compound, or a copolymerization product of a polymerizable non-aqueous floating compound and a polythiol comprising three or four thiol groups.

17 . The composite membrane of claim 1 , wherein the organic membrane comprises:
a polymerization product of one or more multi-functional monomers selected from a multi-functional acryl monomer and a polyfunctional vinyl monomer, or a polymerization product of one or more multi-functional monomers selected from a multi-functional acryl monomer and a polyfunctional vinyl monomer, and a polythiol comprising three or four thiol groups.

18 . The composite membrane of claim 17 , wherein:
the multi-functional monomer is one or more selected from diurethane dimethacrylate, trimethylolpropane triacrylate, diurethane diacrylate, trimethylolpropane trimethacrylate, neopentyl glycol diacrylate, 3′-acryloxy-2′,2′-dimethylpropyl 3-acryloxy-2,2-dimethylpropionate, bisphenol A diacrylate, and 1,3,5-triallyl-1,3,5-triazine-2,4,6-trione, and 3-methacrylpropyl trimethoxysilane and the polythiol is one or more selected from pentaerythritol tetrakis(3-mercaptopropionate), trimethylolpropane tris(3-mercaptopropionate), 4-mercaptomethyl-3,6-dithia-1,8-octanedithiol, pentaerythritol tetrakis(2-mercaptoacetate), and trimethylolpropane tris(2-mercaptoacetate).

19 . The composite membrane of claim 1 , wherein the organic membrane comprises a polymerization product of pentaerythritol tetrakis(3-mercaptopropionate),1,3,5-triallyl-1,3,5-triazine-2,4,6-trione.

20 . The composite membrane of claim 1 , wherein an average diameter of the ion conductive inorganic material particles is about 1 micrometer to about 300 micrometers.

21 . The composite membrane of claim 1 ,
wherein a gas permeability of the composite membrane is about 10 −3 cubic centimeter centimeters per square meter da

Assignees

• Samsung Electronics Co Ltd

Inventors

• Choi Wonsung
• Im Dongmin

Classifications

• H01M2300/0068

  inorganic · CPC title

• H01M10/052

  Li-accumulators · CPC title

• H01M12/06

  with one metallic and one gaseous electrode · CPC title

• H01M10/36

  Accumulators not provided for in groups H01M10/05-H01M10/34 · CPC title

• H01M12/08 Primary

  composed of a half-cell of a fuel-cell type and a half-cell of the secondary-cell type · CPC title