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Novel negative electrode of lithium-ion power battery and lithium-ion power battery

A power battery, lithium ion technology, applied in battery electrodes, batteries, secondary batteries, etc., can solve problems such as disadvantage, electrolyte infiltration, and difficulty in temperature rise of negative electrode performance, and achieve improved safety, product quality and market. Competitiveness, the effect of reducing the DC internal resistance

Inactive Publication Date: 2017-11-03
TIANJIN ENERGIES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The wide application of lithium-ion batteries puts forward higher requirements on the energy density of batteries, and at the same time safety must be taken into account. At present, the widely used lithium-ion battery system is becoming more and more difficult to meet the needs of customers, so continuous improvement and innovation are required
[0003] At present, when the negative electrode of lithium-ion po

Method used

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  • Novel negative electrode of lithium-ion power battery and lithium-ion power battery
  • Novel negative electrode of lithium-ion power battery and lithium-ion power battery

Examples

Experimental program
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Effect test

Embodiment 1

[0026] A novel lithium ion power battery negative pole, its preparation method is as follows,

[0027] 1) Coating a layer of conductive coating on the lithium-ion battery negative electrode current collector, the conductive coating includes the following raw materials in parts by weight; the conductive material is 8 parts of mesophase carbon microspheres, the dispersion liquid is 90 parts of water and ethanol, and The weight ratio of water and ethanol is 6:4, and the binder is 2 parts of polyamide. After high-speed dispersion and ultrasonic vibration, a conductive paste with a solid content of 8% is obtained, and then coated on the copper foil by an anilox roller. The thickness is double-sided thickness (the sum of the thickness of the conductive coating on both sides) 2μm, and it is ready to use after drying;

[0028] 2) The negative electrode slurry produced by the normal homogenization process is coated on the negative electrode current collector with a conductive coating. ...

Embodiment 2

[0033] A novel lithium ion power battery negative pole, its preparation method is as follows,

[0034] 1) Coating a layer of conductive coating on the lithium-ion battery negative electrode current collector, the slurry of the conductive coating includes the following components by weight, the conductive material is 10 parts of multilayer graphene, and the dispersion liquid is water and tert-butyl 85 parts of alcohol, and the weight ratio of the two is 7:3, and the binder is 2 parts of polyamide. After high-speed dispersion and ultrasonic oscillation (oscillation frequency 50KHz), a conductive paste with a solid content of 8% is obtained, and then passed through the net The textured roller is coated on the copper foil with a thickness of 2 μm on both sides, and it is ready for use after drying;

[0035] 2) The negative electrode slurry produced by the normal homogenization process is coated on the negative electrode current collector with a conductive coating. The relevant coati...

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Abstract

The invention provides a novel negative electrode of a lithium-ion power battery and the lithium-ion power battery. The negative electrode of the lithium-ion power battery is provided with a first ceramic coating, a first negative electrode sizing agent, a first conductive coating, a negative electrode current collector, a second conductive coating, a second negative electrode sizing agent and a second ceramic coating from top to bottom in sequence. According to the negative electrode provided by the invention, the direct-current internal resistance of the battery is reduced, the 2C rate capability of the battery can be promoted, the safety of the battery further can be obviously improved, the quality and market competitiveness of the product are powerfully improved, and the negative electrode is beneficial for extensive application in production and has important production practice meanings.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion power batteries, and in particular relates to a novel lithium-ion power battery negative electrode and a lithium-ion power battery. Background technique [0002] With the increase of smog days, the state's investment in the new energy industry has gradually increased, and lithium-ion power batteries, as an important part of new energy vehicles, have attracted widespread attention because of their green environmental protection and high energy output. At present, with the development of technology and the gradual improvement of production efficiency, new energy vehicles have gradually entered thousands of households. The wide application of lithium-ion batteries puts forward higher requirements on the energy density of batteries, and at the same time safety must be taken into account. The current widely-used lithium-ion battery system is becoming more and more difficult to meet the needs of cus...

Claims

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Application Information

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IPC IPC(8): H01M4/133H01M4/1393H01M10/0525C09D5/24
CPCC09D5/24H01M4/133H01M4/1393H01M10/0525H01M2220/20Y02E60/10
Inventor 李杨冯树南从长杰王驰伟
Owner TIANJIN ENERGIES
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