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Preparation method of lithium ion battery electrode piece containing PTC coating layer

A lithium-ion battery and coating technology, which is applied in the direction of battery electrodes, batteries, secondary batteries, etc., can solve problems such as lithium-ion battery safety barriers, achieve battery volume energy density improvement, improve adhesion and compaction Density, reducing the effect of explosion

Active Publication Date: 2019-10-25
江西力能新能源科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the safety of lithium-ion batteries has always been a major obstacle, so the safety of lithium-ion batteries has attracted much attention

Method used

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  • Preparation method of lithium ion battery electrode piece containing PTC coating layer

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Comparison scheme
Effect test

Embodiment 1

[0022] A kind of preparation method of the lithium-ion battery pole piece that the present invention proposes containing PTC coating comprises steps: the cathode active material of lithium-ion battery or negative electrode active material and conductive agent (conductive agent is conductive carbon black), bonding Agents (the ingredients on the market can be synthetic resins) are mixed in a weight ratio of 3:1:1, and the positive electrode slurry or negative electrode slurry is obtained after stirring, and the stirred slurry and sol are mixed in a weight ratio of 4:1, The mixed slurry is sprayed on the surface of the ceramic PTC coating by a spray coating machine. The raw materials of the ceramic PTC coating are 70 parts of barium titanate, 3 parts of titanium dioxide, 5 parts of tantalum pentoxide, 2 parts of lanthanum oxide, tetraoxide 3 parts of lead, 3 parts of calcium carbonate, 2 parts of manganese oxide, the raw materials are mixed with ionized water to prepare ceramic PT...

Embodiment 2

[0025] Further optimization on the basis of Example 1, the raw material of the ceramic PTC coating consists of 85 parts of barium titanate, 8 parts of titanium dioxide, 10 parts of tantalum pentoxide, 4 parts of lanthanum oxide, 3 parts of trilead tetraoxide, and 5 parts of calcium carbonate , composed of 4 parts of manganese oxide, mixed and stirred with the total weight ratio of ionic water at 1:1, after the stirring is completed and coated on the surface of the current collector, the heating rate is 200 ° C / hour, and the temperature is raised to 1250 ° C and then kept for 1 hour , the cooling rate is 250°C / hour, and the temperature is lowered to room temperature to prepare a ceramic PTC coating, and then all the slurry is sprayed on the ceramic PTC coating, and finally dried to form a battery pole piece.

Embodiment 3

[0027] Change on the basis of Example 1, the raw material of ceramic PTC coating consists of 85 parts of barium titanate, 8 parts of titanium dioxide, 3 parts of tantalum pentoxide, 3 parts of trilead oxide, 5 parts of calcium carbonate, and 4 parts of manganese oxide. , mixed with ionized water at a ratio of 1:1 to the total weight, and after the stirring is completed and coated on the surface of the current collector, the heating rate is 200°C / hour, and the temperature is kept at 1250°C for 1 hour, and the cooling rate is 250°C / hour, lower the temperature to normal temperature to obtain a ceramic PTC coating, then spray all the slurry on the ceramic PTC coating, and finally dry it to make a battery pole piece.

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Abstract

The invention discloses a preparation method of a lithium ion battery electrode piece containing a PTC coating layer. The method is characterized in that the method comprises the following steps: mixing a positive active material or a negative active material of the lithium ion battery with a conductive agent and a binder according to a certain ratio; performing stirring to obtain positive electrode slurry or negative electrode slurry; mixing the stirred slurry with sol; before the mixed slurry is coated on a current collector, performing the pre-coating of ceramic PTC coating slurry; performing drying to prepare a battery electrode piece after coating is completed, wherein the ceramic PTC coating layer is composed of barium titanate, titanium dioxide, tantalum pentoxide, lanthanum oxide,lead tetraoxide, calcium carbonate and manganese oxide. According to the invention, a heating source is made by using the temperature resistance characteristic, and can also play a role in overheatingprotection of the battery as a heating element.

Description

technical field [0001] The invention relates to the technical field of preparation of lithium battery components, in particular to a preparation method of a lithium ion battery pole piece containing a PTC coating. Background technique [0002] In recent years, with the depletion of energy and people's requirements for environmental protection, lithium-ion batteries have become the first choice of power energy due to their high energy density and long cycle life. However, the safety issue of lithium-ion batteries has always been a major obstacle, so the safety issue of lithium-ion batteries has attracted people's attention. Contents of the invention [0003] In order to solve the above-mentioned deficiencies in the prior art, the present invention proposes a preparation method of a lithium-ion battery pole piece containing a PTC coating. [0004] In order to solve the above-mentioned technical problems, the present invention adopts the following technical solutions; a prep...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/139H01M4/62H01M10/0525H01M10/613H01M10/615H01M10/654G01B11/06G01B11/28G01N33/00
CPCG01B11/06G01B11/28G01N33/00H01M4/139H01M4/625H01M4/628H01M10/0525H01M2200/106H01M10/613H01M10/615H01M10/654Y02E60/10
Inventor 侯伟侯民郭农庆
Owner 江西力能新能源科技有限公司
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