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In-situ polymerized organic-inorganic composite solid-state battery

A solid-state battery and inorganic composite technology, applied in the direction of secondary batteries, battery electrodes, battery components, etc., can solve the problems of difficult manufacturing and high interface impedance of secondary batteries, achieve close manufacturing process, improve lithium ion transmission capacity, The effect of increasing elasticity

Active Publication Date: 2020-11-13
安普瑞斯(无锡)有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide an in-situ polymerized organic-inorganic composite solid-state battery. The organic solid-state electrolyte phase in the battery has a branched structure. When the electrode is prepared, it undergoes an in-situ polymerization to ensure the electron conduction and ion conduction inside the electrode. After the battery assembly is completed, it undergoes secondary in-situ polymerization to ensure good ion conduction at the interface between the positive and negative electrodes of the battery cell and the electrolyte, and improve the problems of high interface impedance and difficult manufacturing of solid-state lithium-ion secondary batteries

Method used

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Examples

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Effect test

Embodiment 1

[0049] Preparation of positive pole piece: lithium cobaltate, polyvinylidene fluoride, Super-P, lithium bisfluorosulfonyl imide, 1,3-propenyl-sultone, acrylonitrile, diallyl maleate , azobisisobutyronitrile, Li1.3Al0.3Ti1.7(PO4)3 with a median particle diameter of 100nm, according to the weight ratio 96:2:2:1:1.6:0.2:1.6:0.16:6 to join the N -Stir and homogenize in methylpyrrolidone (NMP) to make a positive electrode slurry; apply the positive electrode slurry on both sides of the positive electrode current collector, bake at 85°C for 15 minutes to remove the solvent and initially polymerize, and then compact , slitting, 110°C, 4 hours of secondary baking, cutting, and welding tabs to obtain positive pole pieces.

[0050] Preparation of the negative electrode sheet: polyvinylidene fluoride, Super-P, lithium bisoxalate borate, ethylene carbonate, diallyl adipate, 1-hydroxycyclohexyl phenyl ketone, and a median particle size of 20nm Li0.34La0.56TiO3, according to weight ratio 1...

Embodiment 2

[0054] Preparation of positive electrode sheet: nickel cobalt lithium manganate, polyvinylidene fluoride, Super-P, lithium bisoxalate borate, 1,3-propenyl-sultone, diallyl carbonate, azobisisobutyl Nitrile and LiTi0.3Zr1.7(PO4)3 with a median particle size of 120nm are added to N-methylpyrrolidone (NMP) according to the weight ratio of 96:2:2:1:1.4:2.0:0.16:6 and stirred evenly The positive electrode slurry is made of positive electrode slurry; the positive electrode slurry is coated on both sides of the positive electrode current collector, and the solvent is removed after baking at 85°C for 15 minutes and initially polymerized, and then compacted, cut, and 110°C for 4 hours. The positive pole piece is obtained after secondary baking, cutting, and welding tabs.

[0055] Preparation of negative electrode sheet: sodium methylcellulose, SBR, Super-P, lithium bisoxalate borate, ethylene carbonate, isopentyl tetraacrylate, dimethyl azobisisobutyrate, median particles LiTi0.3Zr1.7...

Embodiment 3

[0059] Preparation of the positive electrode sheet: nickel cobalt lithium manganate, polyvinylidene fluoride, Super-P, lithium bisfluorosulfonyl imide, 1,3-propenyl-sultone, methyl methacrylate, maleic acid Diallyl acid, azobisisobutyronitrile, and Li0.5La0.5TiO3 with a median particle size of 70nm were added to N- Stir and homogenize in methylpyrrolidone (NMP) to make a positive electrode slurry; apply the positive electrode slurry on both sides of the positive electrode current collector, remove the solvent and preliminarily polymerize after baking at 85 ° C for 15 minutes, and then compact, After slitting, 110°C, 4 hours of secondary baking, cutting, and welding the tabs, the positive pole piece is obtained.

[0060] Preparation of negative electrode sheet: artificial graphite, sodium methylcellulose, SBR, Super-P, lithium bisoxalate borate, ethylene carbonate, isopentyl tetraacrylate, dimethyl azobisisobutyrate, The median particle diameter is Li0.5La0.5TiO3 of 40nm, acco...

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Abstract

The invention discloses an in-situ polymerized organic-inorganic composite solid-state battery, which is characterized in that a polymer solid-state electrolyte monomer or oligomer small molecule is compactly connected with an electrode active material, an inorganic fast ion conductor and a lithium salt in an in-situ polymerization manner, wherein the polymer solid electrolyte monomer or oligomersmall molecule at least comprises one compound containing an unsaturated carbon-carbon bond and carbonyl or sulfonyl or sulfinyl; the polymer solid electrolyte monomer or oligomer small molecule at least comprises one compound containing two or more unsaturated carbon-carbon bonds. The battery is small in interface resistance, high in conductivity and resistant to high voltage, the problem that asolid-state battery is poor in room-temperature and low-temperature performance is solved, and the production technological process is simple and reliable.

Description

technical field [0001] The invention relates to the technical field of batteries, in particular to an in-situ polymerized organic-inorganic composite solid-state battery. Background technique [0002] Lithium-ion secondary batteries have the advantages of high voltage and high energy density, and are widely used in power supplies for consumer electronics, energy storage systems, and power systems. In order to improve the energy density and safety performance of lithium-ion batteries, solid-state batteries and solid-state electrolytes It is a question that industry and academia care about recently. [0003] However, solid-state batteries have a series of interface problems and manufacturability problems that need to be solved urgently: inside the electrode, the contact between the active material and the solid-state electrolyte is poor, the interface resistance between the particles and the solid-state electrolyte is large, and the compatibility is poor, which seriously affec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/1391H01M4/1393H01M4/1395H01M4/1397H01M4/04H01M2/14H01M2/16H01M10/0525H01M10/056H01M10/0587
CPCH01M4/139H01M4/1391H01M4/1393H01M4/1395H01M4/1397H01M4/0404H01M10/056H01M10/0525H01M10/0587Y02E60/10Y02P70/50
Inventor 翟传鑫严涛张明慧徐子福
Owner 安普瑞斯(无锡)有限公司
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