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Anode mixture for nonaqueous electrolyte secondary cell, anode for nonaqueous electrolyte secondary cell, and nonaqueous electrolyte secondary cell

A non-aqueous electrolyte and secondary battery technology, applied in the direction of non-aqueous electrolyte batteries, battery electrodes, circuits, etc., can solve the problem of insufficient peel strength of the current collector and the mixture layer, and achieve the effect of excellent peel strength

Inactive Publication Date: 2011-09-14
KUREHA KAGAKU KOGYO KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the peel strength of the current collector and the hybrid layer is still insufficient and needs to be further improved

Method used

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  • Anode mixture for nonaqueous electrolyte secondary cell, anode for nonaqueous electrolyte secondary cell, and nonaqueous electrolyte secondary cell
  • Anode mixture for nonaqueous electrolyte secondary cell, anode for nonaqueous electrolyte secondary cell, and nonaqueous electrolyte secondary cell
  • Anode mixture for nonaqueous electrolyte secondary cell, anode for nonaqueous electrolyte secondary cell, and nonaqueous electrolyte secondary cell

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0146] 8 g of vinylidene fluoride polymer-(1) containing chlorine atoms and polar groups was uniformly dissolved in 92 g of N-methyl-2-pyrrolidone to obtain a binder solution.

[0147] Add 9.2g of MAG (manufactured by Hitachi Chemical Co., Ltd., artificial graphite, average particle size 20μm) and 4.61g of N-methyl-2-pyrrolidone for dilution to 10g of the resulting binder solution, and use defoaming stirring Taro (manufactured by Shinki ) Stir and mix to obtain a negative electrode mixture (1) for a non-aqueous electrolyte secondary battery.

[0148] Using a bar coater, the above-mentioned negative electrode mixture (1) for non-aqueous electrolyte secondary batteries was uniformly coated on a rolled copper foil with a thickness of 10 μm as a current collector so that the weight of the dried mixture layer was 150 g / m 2 In a gear oven (gear oven), dried at 110°C, heat treated at 130°C, pressurized at 40MPa, and the bulk density of the mixture layer is 1.7g / cm 3 The electrode (1). The...

Embodiment 2

[0150] 8 g of vinylidene fluoride polymer-(2) containing chlorine atoms and polar groups was uniformly dissolved in 92 g of N-methyl-2-pyrrolidone to obtain a binder solution.

[0151] Add 9.2g of MAG (manufactured by Hitachi Chemical Co., Ltd., artificial graphite, average particle size 20μm) and 4.61g of N-methyl-2-pyrrolidone for dilution to 10g of the resulting binder solution, and use defoaming stirring Taro (manufactured by Shinki ) Stir and mix to obtain a negative electrode mixture (2) for a non-aqueous electrolyte secondary battery.

[0152] Using a bar coater, the above-mentioned negative electrode mixture (2) for non-aqueous electrolyte secondary batteries was uniformly coated on a rolled copper foil with a thickness of 10 μm as a current collector so that the weight of the dried mixture layer was 150 g / m 2 , In a Geer aging thermostat, dried at 110°C, heat treated at 130°C, and pressurized at 40MPa to obtain a mixture layer with a bulk density of 1.7g / cm 3 The electrodes...

Embodiment 3

[0154] 8 g of vinylidene fluoride polymer-(3) containing chlorine atoms and polar groups was uniformly dissolved in 92 g of N-methyl-2-pyrrolidone to obtain a binder solution.

[0155] Add 9.2g of MAG (manufactured by Hitachi Chemical Co., Ltd., artificial graphite, average particle size 20μm) and 4.61g of N-methyl-2-pyrrolidone for dilution to 10g of the resulting binder solution, and use defoaming stirring Taro (manufactured by Shinki ) Stir and mix to obtain a negative electrode mixture (3) for a non-aqueous electrolyte secondary battery.

[0156] Using a bar coater, the above-mentioned negative electrode mixture for non-aqueous electrolyte secondary batteries (3) was uniformly coated on a rolled copper foil with a thickness of 10 μm as a current collector so that the weight of the dried mixture layer was 150 g / m 2 , In a Geer aging thermostat, dried at 110°C, heat treated at 130°C, and pressurized at 40MPa to obtain a mixture layer with a bulk density of 1.7g / cm 3 The electrodes...

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Abstract

Provided is an anode mixture for nonaqueous electrolyte secondary cells which demonstrates excellent peel strength between the mixture layer and the collector when the nonaqueous electrolyte secondary cells are manufactured. The anode mixture for nonaqueous electrolyte secondary cells comprises a vinylidene fluoride-based polymer containing chlorine atoms and polar groups, an electrode active substance, and an organic solvent. The aforementioned vinylidene fluoride-based polymer containing the chlorine atoms and the polar groups contains 0.3-5 wt% chlorine atoms per 100 wt% of said polymer.

Description

Technical field [0001] The present invention relates to a negative electrode mixture for a non-aqueous electrolyte secondary battery, a negative electrode for a non-aqueous electrolyte secondary battery, and a non-aqueous electrolyte secondary battery. Background technique [0002] In recent years, the development of electronic technology has been remarkable, and various devices are being miniaturized and lightened. In response to the miniaturization and weight reduction of the above-mentioned electronic devices, there is a demand for miniaturization and weight reduction of batteries used as power sources. As a battery that can obtain large energy with a small volume and weight, non-aqueous electrolyte secondary batteries using lithium are mainly used as power sources for small electronic devices used in homes such as mobile phones, personal computers, and video cameras. [0003] The electrodes (positive and negative electrodes) of the above-mentioned non-aqueous electrolyte secon...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/133H01M4/1393H01M4/62
CPCH01M4/1393H01M4/621Y02E60/122H01M4/622H01M4/133Y02E60/10C08L27/16H01M4/583H01M4/62H01M10/05
Inventor 五十岚绫香佐久间充康阿彦信男
Owner KUREHA KAGAKU KOGYO KK