Separator-less conductive polymer solid electrolyte secondary battery

A technology of solid electrolyte and conductive polymer, applied in the direction of non-aqueous electrolyte batteries, secondary batteries, solid electrolytes, etc., can solve the problems of excessive load process and mass production problems, and achieve small temperature dependence and safety Excellent, redox resistance stabilization effect

Pending Publication Date: 2020-09-11
PIOTREK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this method requires an excessively large loading process, and there is a problem in mass production

Method used

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  • Separator-less conductive polymer solid electrolyte secondary battery
  • Separator-less conductive polymer solid electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0138] Conductive polymer solid electrolyte: garnet-based material + polymer conductive composition {grafted polymer (X 1 )+ molten salt (LiFSI) (X 2 )+support salt}

[0139] Cathode: LiCoO 2 + Conductive material {nanoparticle carbon ("SUPERC65" manufactured by IMERYS Graphite & Carbon Co., Ltd.)}

[0140] Negative electrode: natural spherical graphite + conductive material ("SUPER P-Li" manufactured by the same company)

[0141] The preparation method of conductive polymer electrolyte membrane:

[0142] Conductive polymer solid electrolyte: Inorganic solid electrolyte Li 7 La 3 Zr 2 o 12 [Classification number "LLZO-PT" of our company (Piotrek)] (90% by weight), and a polymer conductive composition {vinylidene fluoride copolymer (manufactured by Kureha Chemical Industry Co., Ltd. "KUREHA-K75";-( CH 2 -CF 2 ) m -(CF 2 -CFCl) n (m=96 mol%, n=4 mol%)} grafted 70 mol% molten salt monomer (ionic liquid) {2-(methacryloyloxy)ethyltrimethylammonium bis(fluorosulfonyl )...

Embodiment 2

[0146]Conductive polymer solid electrolyte: use garnet-based materials (80% by weight), and a polymer conductive composition {in making molten salt monomer (ionic liquid) MOETMA-FSI 50 mol% and polyvinylidene fluoride manufactured by Solvay Company Vinyl resin "Solvay#5130" (polyvinylidene fluoride polymer) graft polymerized (X 1 ), fit relative to (X 1 ) is 30% by weight of LiFSI as a supporting salt (20% by weight)}.

[0147] Cathode: LiCo 13 Ni 13 mn 13 o 2 + Conductive material {nanoparticle carbon (SUPER C65)}

[0148] The surface of the positive electrode is impregnated with (X 1 ) in which 30% by weight of LiTFSI as a supporting salt was blended with respect to the conductive polymer composition.

[0149] Positive method:

[0150] In the polymer conductive composition [make molten salt monomer (ionic liquid) {2-(methacryloyloxy)ethyltrimethylammonium (MOETMA) bis(fluorosulfonyl)imide (MOETMA-FSI)} 50% by mole of graft-polymerized vinylidene fluoride copolymer (...

Embodiment 3

[0160] Conductive polymer solid electrolyte: use garnet-based material (LAGP) (80% by weight), and a polymer conductive composition {make molten salt monomer MOETMA-FSI 60 mol% and ARK EMA company polyvinylidene fluoride Resin "Kyner HSV1800" (polyvinylidene fluoride polymer) graft polymerized material (X 1 ) and molten salt monomer (MOETMA-FSI) homopolymer (X 3 ) of the total amount} (20% by weight). (X 1 ): (X 3 ) is 90:10 by weight ratio.

[0161] Cathode: LiCoO 2 + Conductive material {nanoparticle carbon (SUPER P-Li)}

[0162] Negative electrode: lithium metal foil

[0163] Positive method:

[0164] Using the above LiCoO 2 The positive pole is used as the positive pole. By weight ratio (X 1 ): (X 3 ) into 90:10 with the above polymer conductive composition (X 1 ) and molten salt monomer homopolymer (X 3 ), doped with supporting salt (LiBF 4 )30% by weight to obtain polymer conductive composition (X 3 ), was further diluted with an acetonitrile solvent to a ...

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Abstract

Provided is a separator-less conductive polymer solid electrolyte secondary battery comprising a positive electrode / a conductive polymer electrolyte layer / a negative electrode, wherein the electrolytelayer is composed of an inorganic solid electrolyte and the following polymeric conductive composition, or of a composite combining the same with a polyether-based polymer. A polymeric conductive composition (X1) obtained by graft polymerization or living radical polymerization of a molten salt monomer and a fluoropolymer, the molten salt monomer having a salt structure composed of onium cationsand halogen-containing anions and having a polymerizable functional group, or a polymeric conductive composition containing a polymer or copolymer of X1 and at least one material selected from among X2 and X3, wherein X2 is a molten salt monomer having a molten salt or salt structure that is composed of onium cations and halogen-containing anions, and having a polymerizable functional group, and X3 is a molten salt monomer having a salt structure that is composed of onium cations and halogen-containing anions, and having a polymerizable functional group.

Description

technical field [0001] The present invention relates to a secondary battery without a diaphragm, which is a secondary battery without a diaphragm, which suppresses the particle interface resistance with positive and negative electrode active material particles using a conductive polymer solid electrolyte, and the interface resistance with an electrode, and Thinner battery cells can be achieved, the temperature dependence is small, and the safety in the event of a short circuit is excellent, so it is expected in the future. Background technique [0002] Various conductive polymer compositions for secondary batteries having excellent conductivity are known. For example, a composite polymer conductive composition has been developed, which is produced by graft-polymerizing a monomer composition containing a molten salt monomer and a charge transfer ion source in the presence of a fluorine-based polymer such as polyvinylidene fluoride , the above-mentioned molten salt monomer ha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/056C08F259/08C08L51/06H01M10/0525
CPCH01M10/0525H01M10/056C08F259/08Y02E60/10H01M10/052H01M2300/0068H01M2300/0082H01M2300/0091H01M2004/028H01M4/131H01M4/587H01M4/382H01M4/525H01M4/505H01M4/5825Y02P70/50C08L51/003C08F220/34H01M4/62H01M10/4235H01M2300/0065
Inventor 佐田勉
Owner PIOTREK
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