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High-safety and high-performance negative electrode of lithium ion battery and battery of negative electrode

A lithium-ion battery and negative electrode technology, which is applied in the field of lithium-ion battery negative electrodes and batteries, to achieve the effect of high pass rate and simple process

Inactive Publication Date: 2016-12-21
TIANJIN ENERGIES
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problems in the prior art, the invention provides a lithium ion battery negative electrode and its battery, which can avoid the situation that the inorganic insulating coating cannot function due to the randomness of acupuncture, and significantly improve the acupuncture performance of the battery cell. safety performance

Method used

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  • High-safety and high-performance negative electrode of lithium ion battery and battery of negative electrode
  • High-safety and high-performance negative electrode of lithium ion battery and battery of negative electrode
  • High-safety and high-performance negative electrode of lithium ion battery and battery of negative electrode

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Embodiment Construction

[0028] The invention will be further described below in conjunction with specific embodiments.

[0029] Detection method

[0030] The lithium ion battery negative electrode and battery obtained in the present invention are detected by the following method.

[0031] 1. The electronic conductivity is the conductivity of the negative plate, using the four-probe method;

[0032] 2. The test method for the diffusion coefficient of lithium ions is that the negative plate and the lithium plate are assembled into a button-type half-cell, which is activated by charge and discharge and adjusted to 0.005V, and the diffusion coefficient of the half-cell is tested by the constant potential intermittent titration method;

[0033] 3. The discharge capacity ratio of 3C / 1C rate and the capacity retention rate of 1C / 1C cycle for 500 cycles are the test data of the finished battery with nickel-cobalt-lithium manganese oxide as the positive electrode;

[0034] 4. Acupuncture pass rate, 10 batt...

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Abstract

The invention creates a negative electrode of a lithium ion battery. A special inorganic compound is uniformly added to a negative electrode active substance of the negative electrode, and the special inorganic compound is an inorganic substance or a mixture of the inorganic substance which has the characteristics of ion conduction and non-electron conduction in the lithium ion negative electrode. With the negative electrode created by the invention, the situation that the effect of an inorganic insulation coating layer cannot be developed due to acupuncture randomness can be avoided, and the acupuncture safety of a battery cell is remarkably improved.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery production and manufacturing, and in particular relates to a high-safety, high-performance lithium-ion battery negative electrode and a battery thereof. Background technique [0002] Acupuncture safety performance of lithium-ion batteries is critical. Reducing the short-circuit point resistance at the instant of acupuncture is fundamental to improving the safety of acupuncture. [0003] The existing technology to improve the acupuncture safety performance of lithium-ion batteries is to use inorganic insulating coatings such as aluminum oxide and boehmite on the interface of lithium-ion batteries, such as the surface of the positive electrode, negative electrode or separator. [0004] The use of inorganic insulating coating on the interface of the battery requires the inorganic insulating material to be made into slurry and coated on the surface of the positive electrode, negative elec...

Claims

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Application Information

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IPC IPC(8): H01M4/13H01M4/62
CPCH01M4/13H01M4/621H01M4/625Y02E60/10
Inventor 刘静高秀玲王驰伟王立仕
Owner TIANJIN ENERGIES
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