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a two-dimensional ti 3 c 2 t x Preparation method and application of modified carbon fluoride composite cathode material

A composite positive electrode material and carbon fluoride technology, which is applied in the direction of positive electrodes, battery electrodes, active material electrodes, etc., can solve the problems of restricting large-scale applications, poor rate performance, and serious heat generation, and achieve easy large-scale production and conductive Excellent performance and the effect of improving the discharge voltage platform

Active Publication Date: 2022-06-07
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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  • a two-dimensional ti <sub>3</sub> c <sub>2</sub> t <sub>x</sub> Preparation method and application of modified carbon fluoride composite cathode material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

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

[0025] (1) Weigh 1gCF x (ie, carbon fluoride) positive electrode material, slowly pour it into a mixed solution containing deionized water and ethanol (the volume ratio of deionized water and ethanol is 2:1), in which deionized water is 20ml, and ethanol is 10ml; ultrasonic stirring 6h to get a well-mixed CF x suspension;

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

[0027] (3) carry out suction filtration with the suspension of step (2), wash 4 times with deionized water, obtain mixture;

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

[0029] (5) The composite material obtained in step (4) is placed in a tube furnace, heated to 150°C for 3 hours at a rate of 5°C / min under argon protection, and naturally ...

Embodiment 2

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

[0032] (1) Weigh 1gCF x (ie, carbon fluoride) positive electrode material, slowly pour it into a mixed solution containing deionized water and ethanol (the volume ratio of deionized water and ethanol is 2:1), in which deionized water is 20ml, and ethanol is 10ml; ultrasonic stirring 6h to get a well-mixed CF x suspension;

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

[0034] (3) carry out suction filtration with the suspension of step (2), wash 4 times with deionized water, obtain mixture;

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

[0036] (5) The composite material obtained in step (4) is placed in a tube furnace, heated to 150°C for 3 hours at a rate of 5°C / min under argon protection, and naturally...

Embodiment 3

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

[0039] (1) Weigh 1g CF x (ie, carbon fluoride) positive electrode material, slowly pour it into a mixed solution containing deionized water and ethanol (the volume ratio of deionized water and ethanol is 2:1), in which deionized water is 20ml, and ethanol is 10ml; ultrasonic stirring 6h to get a well-mixed CF x suspension;

[0040] (2) Put 0.05g Ti 3C 2 T x Add to the suspension of step (1), under argon protection, ultrasonic stirring for 24h to obtain a mixed suspension;

[0041] (3) carry out suction filtration with the suspension of step (2), wash 4 times with deionized water, obtain mixture;

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

[0043] (5) The composite material obtained in step (4) is placed in a tube furnace, heated to 150°C for 3 hours at a rate of 5°C / min under argon protection, and naturally...

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Abstract

The present invention is a two-dimensional Ti 3 C 2 T x Modified fluorocarbons (CF x ) The preparation method and application of the composite positive electrode material belong to the battery positive electrode material, especially in the technical field of the primary battery positive electrode material. The steps are: the CF x The material was uniformly dispersed in a mixed solution of deionized water and ethanol; the two-dimensional Ti 3 C 2 Tx is added to CF in a certain proportion x Ultrasonic stirring is carried out in the suspension to make it fully mixed; the mixed suspension is suction filtered and washed with deionized water several times to obtain a mixture; the mixture is freeze-dried to obtain a composite material; the composite material is placed in an inert atmosphere In the tube furnace, the high temperature treatment is carried out, and the two-dimensional Ti is obtained after cooling down to room temperature. 3 C 2 T x Modified fluorocarbon materials. The present invention successfully converts Ti 3 C 2 T x Modification between the carbon fluoride material particles significantly improves the specific surface area and electrical conductivity of the carbon fluoride material. Used as the positive electrode material of lithium fluoride battery, it greatly improves its discharge voltage platform and specific capacity, and reduces the voltage hysteresis.

Description

technical field [0001] The invention belongs to battery positive electrode materials, in particular to the technical field of primary battery positive electrode materials, and in particular relates to a two-dimensional Ti 3 C 2 T x Preparation method and application of 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. Electrochemical battery is an efficient and stable energy storage system. Lithium primary battery has excellent performance. It is widely used in various civil and military fields such as sensors, cameras, pacemakers, and aircraft. At present, common lithium primary batteries include lithium manganese dioxide batteries, lithium thionyl chloride batteries, lithium sulfur dioxide batteries, lithium carbon fluoride batteries, and lithium iron batteries. As a cathode material for lithium...

Claims

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Application Information

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Patent Type & Authority Patents(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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