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A kind of molybdenum disulfide/carbon fiber network flexible electrode and its preparation method and application

A molybdenum disulfide, flexible electrode technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of inability to meet the requirements of flexible lithium-ion batteries, cumbersome preparation process, poor electrode flexibility, etc., and is suitable for mass production. Simplified process steps, not easy to fall off

Active Publication Date: 2020-03-27
XIANGTAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these molybdenum disulfide / carbon composite materials often have a long preparation period, high raw material costs, and large energy consumption; The process is cumbersome, and the flexibility of the prepared electrode is poor, which cannot meet the requirements of flexible lithium-ion batteries

Method used

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  • A kind of molybdenum disulfide/carbon fiber network flexible electrode and its preparation method and application
  • A kind of molybdenum disulfide/carbon fiber network flexible electrode and its preparation method and application
  • A kind of molybdenum disulfide/carbon fiber network flexible electrode and its preparation method and application

Examples

Experimental program
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Effect test

Embodiment 1

[0046] Weigh 0.1960g of ammonium molybdate and 0.1903g of thiourea, add them to 5mL of deionized water successively, carry out magnetic stirring at a stirring speed of 200r / min to dissolve them into a solution, and then sonicate for 15min with an ultrasonic machine with a power of 320W Mix it well. Take the pre-cut Hangzhou Fuyang Xinxing slow-speed quantitative filter paper disk with a diameter of 19mm and immerse it in the above mixture, and use an ultrasonic device with a power of 320W for 30 minutes, and then in 10 -1 Pa stand in a vacuum box for 12 hours. The above-mentioned fully soaked filter paper discs were frozen in a refrigerator for 12 hours, and then placed in a freeze dryer at -50°C for 30 hours in vacuum to obtain a filter paper disc containing a mixture of molybdenum source and sulfur source airgel. Then put it in a porcelain boat, put the porcelain boat into the constant temperature zone of the tube furnace, first pass in 300mL / min argon gas for 30min to remo...

Embodiment 2

[0050] Weigh 0.2059g of sodium molybdate and 0.3806g of thiourea, add them to 2mL of deionized water successively, carry out magnetic stirring at a stirring speed of 200r / min to dissolve them into a solution, and then sonicate them with a 320W ultrasonic machine for 15min Mix it well. Take the pre-cut Hangzhou Fuyang Xinxing medium-speed quantitative filter paper disk with a diameter of 14mm and immerse it in the above mixture, and use an ultrasonic device with a power of 320W for 30 minutes, and then in 10 -1 Pa stand in a vacuum box for 12 hours. The above-mentioned fully soaked filter paper disks were frozen in a refrigerator for 12 hours, and then placed in a freeze dryer at -80°C for 24 hours in vacuum to obtain a filter paper disk containing a mixture of molybdenum source and sulfur source airgel. Then put it in a porcelain boat, put the porcelain boat into the constant temperature zone of the tube furnace, first pass in 500mL / min argon gas for 20min to remove the air, ...

Embodiment 3

[0053] Weigh 0.1960g of ammonium molybdate and 0.1878g of thioacetamide, add them to 3mL of deionized water successively, carry out magnetic stirring at a stirring speed of 200r / min to dissolve them into a solution, and then use a 320W ultrasonic Sonicate for 15 minutes to make it evenly mixed. Take the pre-cut Hangzhou Fuyang Xinxing slow quantitative filter paper disk with a diameter of 14mm and immerse it in the above mixture, sonicate with a power 320W ultrasonic machine for 30min, then in 10 -1 Pa stand in a vacuum box for 12 hours. The above-mentioned fully soaked filter paper discs were frozen in a refrigerator for 12 hours, and then placed in a freeze dryer at -50°C for 24 hours in vacuum to obtain a filter paper disc containing a mixture of molybdenum source and sulfur source airgel. Then put it in a porcelain boat, put the porcelain boat into the constant temperature zone of the tube furnace, first pass 200mL / min nitrogen gas for 30min to remove the air, then pass 5...

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Abstract

The invention discloses a MoS2 / carbon fiber network flexible electrode and a preparation method and application thereof. The flexible electrode is formed by wrapping a surface of a three-dimensional carbon fiber network substrate framework with MoS2. The preparation method of the flexible electrode comprises the steps of placing cotton fiber paper in a mixed solution of a molybdenum source and a sulfur source for immersion, and sequentially performing vacuum freezing, drying, calcination and cooling to obtain the flexible electrode. According to the method, the cotton fiber paper is used as a carrier of the sulfur source and the molybdenum source, a three-dimensional porous conductive carbon fiber network structure with flexibility is generated by high-temperature carbonization, meanwhile, in-site growth and loading of the MoS2 are achieved, a current collector, and an adhesive and a conductive agent are prevented from being used during the traditional electrode preparation process; and moreover, the method has the advantages of simplicity, high efficiency and the like, and the obtained MoS2 / carbon fiber network electrode has favorable cycle property, rate performance and flexibility and can be used as a flexible lithium ion battery negative electrode so as to be widely applied in the field of a wearable electrochemical energy-storage or flexible electronic product.

Description

technical field [0001] The invention relates to a negative electrode of a lithium ion battery, in particular to a molybdenum disulfide / carbon fiber network flexible electrode, a preparation method thereof and an application in a flexible lithium ion battery, belonging to the field of secondary battery electrode materials. Background technique [0002] Flexible lithium-ion batteries are widely used in flexible display devices, bendable electronic products, and wearable electronic products due to their high specific energy, long cycle life, no environmental pollution, and good flexibility. However, it is still a big challenge to prepare lithium-ion batteries with low cost, flexibility, environmental friendliness, high energy density and high power density, and the key is the electrode material, especially the negative electrode material. [0003] In recent years, two-dimensional transition metal dichalcogenides (TMDs) have been extensively studied as anode materials for lithiu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/133H01M4/136H01M4/1393H01M4/1397
CPCH01M4/133H01M4/136H01M4/1393H01M4/1397Y02E60/10
Inventor 郑学军何文远王银民裴大钊张强
Owner XIANGTAN UNIV
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