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Binder resin for lithium secondary battery electrode, electrode for lithium secondary battery, and lithium secondary battery

A binder resin and lithium secondary battery technology, applied in battery electrodes, non-aqueous electrolyte battery electrodes, lithium batteries, etc., can solve problems such as insufficient characteristics, achieve excellent charge and discharge efficiency and safety, and high specific capacity , The effect of improving output characteristics and life

Active Publication Date: 2017-12-01
HEFEI HANZHIHE MATERIAL SCI & TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the electrodes obtained by the methods of Patent Documents 8 and 9 are not sufficient to satisfy the characteristics required for electrodes for lithium secondary batteries.

Method used

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  • Binder resin for lithium secondary battery electrode, electrode for lithium secondary battery, and lithium secondary battery
  • Binder resin for lithium secondary battery electrode, electrode for lithium secondary battery, and lithium secondary battery
  • Binder resin for lithium secondary battery electrode, electrode for lithium secondary battery, and lithium secondary battery

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0113] A stirrer, a nitrogen gas introduction tube, and a cooling tube equipped with a moisture receiver were attached to a glass-made three-neck separable flask. Throw in 58.84g (0.2 mole) of 3,4,3',4'-biphenyltetracarboxylic dianhydride, 15.21g (0.1 mole) of 1,3-diaminobenzoic acid (carboxyl-containing aromatic diamine; general formula [ Ar in II] 1 Components), valerolactone 1.5g (0.015 mol), pyridine 2.4g (0.03 mol), NMP 200g, toluene 30g, at room temperature, under nitrogen atmosphere, after stirring at 200rpm for 30 minutes, the temperature was raised to 180°C, and heated and stirred for 1 hour. After removing 15ml of the azeotropic component of toluene-water, after air cooling, add 46.53g (0.15mol) of 4,4'-oxydiphthalic dianhydride, 73.0g of 1,3-bis(3-aminophenoxy)benzene g (0.25 mole) (aromatic diamine containing aromatic ether bond; Ar in general formula [III] 2 Component), NMP360g, toluene 90g, after stirring at room temperature for 30 minutes, the temperature was ...

Embodiment 2

[0115] The same apparatus as in Synthesis Example 1 was used. Add 58.84 g (0.2 mol) of 3,4,3',4'-biphenyltetracarboxylic dianhydride, 5-amino-1-(4'-aminophenyl)-1,3,3-trimethylindane 26.38g (0.1 mol) (aromatic diamine containing phenylindane structure; Ar in general formula [IV] 3 Components), valerolactone 1.5g (0.015 mol), pyridine 2.4g (0.03 mol), NMP 200g, toluene 30g, at room temperature, under nitrogen atmosphere, after stirring at 200rpm for 30 minutes, the temperature was raised to 180°C, and heated and stirred for 1 hour. After removing 15ml of the azeotropic component of water-toluene and air cooling, add 46.53g (0.15mol) of 4,4'-oxydiphthalic dianhydride and 73.0g of 1,3-bis(3-aminophenoxy)benzene g (0.25 mole) (aromatic diamine containing aromatic ether bond; Ar in general formula [III] 2 Component), NMP360g, toluene 90g, after stirring at room temperature for 30 minutes, the temperature was raised to 180° C., and heated and stirred for 1 hour. After removing 45...

Embodiment 3

[0127] The mass of the polyimide solution used in Example 1 was 75 g (polyimide solid content: 15g), and the negative electrode was produced by the method similar to Example 1 except that.

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Abstract

Provided are a binder resin for a lithium secondary battery electrode, the binder resin containing a solvent-soluble polyimide having a repeating unit represented by general formula [I] below, and a method for preparing the binder resin for an electrode (in the formula, Z represents an aromatic or cycloaliphatic tetracarboxylic acid dianhydride residue, and Ar represents a carboxyl group-containing aromatic diamine residue and an aromatic ether bond-containing aromatic diamine residue, or a phenylindane structure-containing aromatic diamine residue).

Description

technical field [0001] The present invention relates to a binder resin for electrodes of a lithium secondary battery, an electrode for a lithium secondary battery manufactured using the same, and a lithium secondary battery. Background technique [0002] Lithium secondary batteries are used as power sources for electronic products such as mobile phones, smartphones, tablet PCs, and notebook computers, and demand is rapidly increasing as large-capacity batteries that constitute power sources and energy storage systems for electric vehicles. The electrode of the lithium secondary battery is obtained by applying a slurry (mixed material) obtained by mixing an active material, a conductive material, a binder resin, and a solvent, etc. However, in order to increase the energy density and output density, it is necessary to use active materials with high specific capacity and output characteristics. [0003] For example, lithium transition metal oxides, lithium iron phosphate, and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/13H01M4/131H01M4/133H01M4/134H01M4/136H01M4/139H01M4/485H01M4/58
CPCH01M4/13H01M4/0404H01M4/622H01M10/052Y02E60/10H01M4/131H01M4/134H01M4/133H01M4/136H01M4/139H01M4/0471C08G73/1007Y02T10/70H01M4/485H01M4/58
Inventor 铃木铁秋胁周三卢焕珍洪承俊
Owner HEFEI HANZHIHE MATERIAL SCI & TECH CO LTD
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