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Cathode material for lithium-ion secondary battery with high safety, manufacturing method and battery application

A technology for positive electrode materials and secondary batteries, which is applied in the direction of secondary batteries, battery electrodes, batteries, etc., can solve problems such as improvement and hidden dangers in the safety of positive electrode materials for lithium-ion secondary batteries, and achieve simple and feasible processes and improved safety performance and other performance, and the effect of suppressing battery combustion

Active Publication Date: 2016-08-17
GUIZHOU ZHENHUA E CHEM INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The technical problem solved by the present invention is: the safety of the positive electrode material of lithium-ion secondary battery in the prior art still has hidden danger, needs further improvement

Method used

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  • Cathode material for lithium-ion secondary battery with high safety, manufacturing method and battery application
  • Cathode material for lithium-ion secondary battery with high safety, manufacturing method and battery application
  • Cathode material for lithium-ion secondary battery with high safety, manufacturing method and battery application

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preparation example Construction

[0057] Generally speaking, the preparation method of the positive electrode material of the present invention, that is, the coating material includes the following steps:

[0058] 1) First prepare the thickener solution

[0059] Carboxymethylcellulose (sodium) is added into deionized water to dissolve, and 0.1wt%-5wt% carboxymethylcellulose (sodium) is prepared for use.

[0060] 2) Preparation of a dispersion containing Fe(II) compound

[0061] Among them, the preparation method of lithium ferrous phosphate, lithium ferrous oxalate, and ferrocene (II) dispersion liquid is as follows: First, weigh 100 kg of analytical alcohol solvent (analytic pure ethanol, isopropanol, etc.) and pour it into the container Add 30-80kg polyaldehyde ketone high molecular polymer to it slowly, stir and dissolve to form a uniform solution for later use, the solid weight content of the solution is (25-75wt%) in parts by weight, and the temperature range from room temperature to 60°C Inside, add Fe...

Embodiment 1

[0074] The preparation of embodiment 1 thickener solution

Embodiment 1-1

[0075] The preparation of embodiment 1-1 sodium carboxymethylcellulose thickener solution

[0076] First weigh a certain amount of deionized water, then add sodium carboxymethylcellulose into the deionized water to dissolve, and prepare 0.1wt% sodium carboxymethylcellulose for later use.

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Abstract

The invention discloses a high-safety cathode material of a lithium ion secondary battery, a preparation method of the high-safety cathode material and application of the high-safety cathode material in battery manufacture. The cathode material is a two-phase structure material for coating a compound containing Fe (II) on a base cathode material, the base cathode material is one or more elements of Li(x)Ni(y)Co(z)Mn(1-y-z) O2 or Al, Ti, Y, La, Zr, for doping Li(x)Ni(y)Co(z)Mn (1-y-z)O2, wherein x is equal to 1 to 1.1, y is equal to 0 to 1.0, Z is equal to 0 to 1.0, and the sum of y and z is not more than 1.0; the cathode material is obtained by carrying out coating through a microemulsion process, subsequently, desorbing a solvent and implementing sintering under the protective atmosphere, and can be applied to power electric vehicles, mobile storage power supply and the lithium ion secondary battery in energy storage power station equipment. The high-safety cathode material disclosed by the invention obviously improves the battery safety performance on the basis of not changing basic performance of the original cathode material.

Description

technical field [0001] The invention relates to the field of lithium-ion secondary batteries, in particular to a positive electrode material for improving the safety of lithium-ion secondary batteries. Oxygen and its elements are doped with basic positive electrode materials, etc. to form a two-phase structure to improve the safety of lithium-ion secondary batteries; the invention also relates to the preparation method of the positive electrode material, and the electrochemical performance of the positive electrode material. An improved power type lithium-ion secondary battery. Background technique [0002] Due to the advantages of high energy density, high working voltage and long cycle life, lithium-ion secondary batteries are widely used as power sources for various mobile devices, energy storage power stations, and even in aviation, aerospace, navigation, automobiles, medical equipment, etc. Gradually replace other traditional batteries in the field. [0003] As lithiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/131H01M4/505H01M4/525H01M10/0525
CPCH01M4/505H01M4/525H01M10/0525H01M2220/20Y02E60/10
Inventor 向黔新赵孝连梅铭曾国城向春华张晓杨富友范春霞
Owner GUIZHOU ZHENHUA E CHEM INC