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Preparation method and application of two-dimensional Ti3C2Tx modified carbon fluoride composite positive electrode material

A composite cathode material, carbon fluoride technology, applied in the direction of positive electrode, battery electrode, active material electrode, etc., can solve the problems of limited large-scale application, poor rate performance, serious heat generation, etc., to achieve easy large-scale production, electrical conductivity Excellent performance, the effect of improving the discharge voltage platform

Active Publication Date: 2020-07-17
SHANDONG ZHONGSHAN PHOTOELECTRIC MATERIAL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the heavy C-F bonds of carbon fluoride exist in the form of covalent bonds, resulting in extremely low conductivity, poor rate performance, and severe heat generation during discharge, which limits its large-scale application.

Method used

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  • Preparation method and application of two-dimensional Ti3C2Tx modified carbon fluoride composite positive electrode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A two-dimensional Ti 3 C 2 T x The preparation method of the modified carbon fluoride composite cathode material,

[0025] (1) Weigh 1gCF x (i.e. fluorinated carbon) positive electrode material, slowly poured into a mixed solution containing deionized water and ethanol (volume ratio of deionized water and ethanol 2:1), wherein deionized water is 20ml, ethanol is 10ml; ultrasonic stirring 6h to get mixed CF x suspension;

[0026] (2) Add 0.05g Ti 3 C 2 T x Adding to the suspension in step (1), under the protection of argon, ultrasonically stirred for 6 hours to obtain a mixed suspension;

[0027] (3) The suspension in step (2) is suction filtered, and washed 4 times with deionized water to obtain a mixture;

[0028] (4) freeze-drying the mixture of step (3) for 36 hours to obtain a composite material;

[0029] (5) Put the composite material obtained in step (4) in a tube furnace, heat up to 150°C for 3 hours at a rate of 5°C / min under the protection of argon, a...

Embodiment 2

[0031] A two-dimensional Ti 3 C 2 T x The preparation method of the modified carbon fluoride composite cathode material,

[0032] (1) Weigh 1gCF x (i.e. fluorinated carbon) positive electrode material, slowly poured into a mixed solution containing deionized water and ethanol (volume ratio of deionized water and ethanol 2:1), wherein deionized water is 20ml, ethanol is 10ml; ultrasonic stirring 6h to get mixed CF x suspension;

[0033] (2) Add 0.05g Ti 3 C 2 T x Adding to the suspension in step (1), under the protection of argon, ultrasonically stirred for 12 hours to obtain a mixed suspension;

[0034] (3) The suspension in step (2) is suction filtered, and washed 4 times with deionized water to obtain a mixture;

[0035] (4) freeze-drying the mixture of step (3) for 36 hours to obtain a composite material;

[0036] (5) Put the composite material obtained in step (4) in a tube furnace, heat up to 150°C for 3 hours at a rate of 5°C / min under the protection of argon, ...

Embodiment 3

[0038] A two-dimensional Ti 3 C 2 T x The preparation method of the modified carbon fluoride composite cathode material,

[0039] (1) Weigh 1g CF x (i.e. fluorinated carbon) positive electrode material, slowly poured into a mixed solution containing deionized water and ethanol (volume ratio of deionized water and ethanol 2:1), wherein deionized water is 20ml, ethanol is 10ml; ultrasonic stirring 6h to get mixed CF x suspension;

[0040] (2) Add 0.05g Ti 3 C2 T x Adding to the suspension in step (1), under the protection of argon, ultrasonically stirred for 24 hours to obtain a mixed suspension;

[0041] (3) The suspension in step (2) is suction filtered, and washed 4 times with deionized water to obtain a mixture;

[0042] (4) freeze-drying the mixture of step (3) for 36 hours to obtain a composite material;

[0043] (5) Put the composite material obtained in step (4) in a tube furnace, heat up to 150°C for 3 hours at a rate of 5°C / min under the protection of argon, a...

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Abstract

The invention relates to a preparation method and application of a two-dimensional Ti3C2Tx modified carbon fluoride (CFx) composite positive electrode material, belongs to a battery positive electrodematerial, and particularly relates to the technical field of primary battery positive electrode materials. The preparation method comprises the following steps of uniformly dispersing a CFx materialinto a mixed solution of deionized water and ethanol; adding the two-dimensional Ti3C2Tx into the CFx suspension according to a certain proportion, and carrying out ultrasonic stirring to fully mix the two-dimensional Ti3C2Tx and the CFx suspension; filtering the mixed suspension, and washing with deionized water for multiple times to obtain a mixture; freezing and drying the mixture to obtain a composite material; and putting the composite material into a tubular furnace in an inert atmosphere, carrying out high-temperature treatment, and cooling to room temperature to obtain the two-dimensional Ti3C2Tx modified carbon fluoride material. According to the preparation method, the Ti3C2Tx is successfully modified among the particles of the carbon fluoride material, so that the specific surface area and the conductivity of the carbon fluoride material are remarkably improved. When the material is used as a positive electrode material of a lithium carbon fluoride battery, the discharge voltage platform and specific capacity are greatly improved, and the voltage lag is reduced.

Description

technical field [0001] The invention belongs to battery positive electrode materials, especially in the technical field of primary battery positive electrode materials, and specifically relates to a two-dimensional Ti 3 C 2 T x The preparation method and application of the modified carbon fluoride composite cathode material. Background technique [0002] With the shortage of resources and the worsening of environmental problems, it is imminent to develop a green, safe and clean renewable energy source. Electrochemical batteries are an efficient and stable energy storage system. Lithium primary batteries have excellent performance. It is widely used in various civil and military fields such as sensors, cameras, cardiac pacemakers, and aircraft. Currently common lithium primary batteries include lithium manganese dioxide batteries, lithium thionyl chloride batteries, lithium sulfur dioxide batteries, lithium carbon fluoride batteries, lithium iron batteries, etc. As a cath...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/583H01M6/14
CPCH01M4/5835H01M4/624H01M6/14H01M2004/028H01M2004/021Y02E60/10
Inventor 郭飞飞常慧李朋飞李栋徐广林焦文慧马云晓方治文
Owner SHANDONG ZHONGSHAN PHOTOELECTRIC MATERIAL CO LTD
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