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Preparation method of molybdenum diselenide/carbon fiber cloth composite

A carbon fiber cloth and composite material technology, which is applied in the field of preparation of molybdenum diselenide/carbon fiber cloth composite materials, can solve the problems of low energy density and limited specific capacity of pure carbon fibers, and achieve uniform growth, good electrochemical performance, and easy realization. Effect

Active Publication Date: 2019-02-15
SHAANXI UNIV OF SCI & TECH
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  • Description
  • Claims
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Problems solved by technology

Carbon fiber has excellent chemical stability, high porosity three-dimensional structure and relatively good processing performance, but pure carbon fiber has limited specific capacity and low energy density

Method used

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  • Preparation method of molybdenum diselenide/carbon fiber cloth composite
  • Preparation method of molybdenum diselenide/carbon fiber cloth composite
  • Preparation method of molybdenum diselenide/carbon fiber cloth composite

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preparation example Construction

[0028] The preparation method of molybdenum diselenide / carbon fiber cloth composite material of the present invention comprises the following steps:

[0029] 1) Dissolve selenium powder in 5-10 mL of hydrazine hydrate, and then undergo ultrasonic treatment to form 0.04-0.4 mmol mL -1 Solution A; wherein, the ultrasonic treatment is carried out in an ultrasonic generator, the power of the ultrasonic generator is 300W, and the ultrasonic time is 1-5 hours.

[0030] Dissolve sodium molybdate in 20-40mL deionized water to form 0.006-0.03mmol mL -1 Solution B, then add 20-200mg chitosan;

[0031] The carbon cloth is subjected to anodic oxidation pretreatment, then washed and dried to obtain a hydrophilic carbon cloth; wherein, the voltage of the anodic oxidation treatment is 3-7V, the current is 0.2-0.6A, and the treatment time is 1-10min.

[0032] 2) Mix solution A and solution B to form solution C, arrange the anodized hydrophilic carbon in solution C, ultrasonically treat, the...

Embodiment 1

[0036] 1) Dissolve selenium powder in 5mL of hydrazine hydrate, then sonicate for 2h under the condition of ultrasonic generator power of 300W to form 0.2mmol mL -1 Liquid A;

[0037] 2) Sodium molybdate was dissolved in 40 mL deionized water to form 0.03 mmol mL -1 liquid, then add 20mg chitosan to obtain solution B;

[0038] 3) The hydrophilic carbon cloth was anodized at 5V and 0.36A for 2 minutes, then washed with acetone, ethanol, and deionized water in sequence, and then dried;

[0039] 4) Mix liquid A and liquid B to form solution C, arrange the anodized hydrophilic carbon in solution C, ultrasonically treat for 2 hours under the condition of ultrasonic generator power of 300W, and then hydrothermally heat at 200°C After reacting for 12 hours, washing with ethanol and deionized water three times respectively, and then vacuum-drying at 60°C for 24 hours to obtain a carbon fiber cloth with molybdenum diselenide grown on it;

[0040] 5) Calcining the molybdenum diseleni...

Embodiment 2

[0045]1) Dissolve selenium powder in 10mL of hydrazine hydrate, and then sonicate for 1h under the condition of ultrasonic generator power of 200W to form 0.1mmol mL -1 Liquid A;

[0046] 2) Sodium molybdate was dissolved in 30 mL deionized water to form 0.01 mmol mL -1 liquid, then add 200mg chitosan to obtain solution B;

[0047] 3) The hydrophilic carbon cloth was anodized at 4V and 0.3A for 5 minutes, then washed with acetone, ethanol, and deionized water in sequence, and then dried;

[0048] 4) Mix liquid A and liquid B to form solution C, arrange the anodized hydrophilic carbon in solution C, ultrasonicate for 1 h under the condition of ultrasonic generator power of 200W, and then hydrothermally heat at 180°C After reacting for 24 hours, washing with ethanol and deionized water three times respectively, and then vacuum-drying at 60°C for 24 hours to obtain a carbon fiber cloth with molybdenum diselenide grown on it;

[0049] 5) Calcining the molybdenum diselenide-grow...

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Abstract

A preparation method of a molybdenum diselenide / carbon fiber cloth composite comprises the following steps: dissolving selenium powder in hydrazine hydrate, and performing ultrasonic processing to form a solution A; dissolving sodium molybdate in deionized water, and adding chitosan to obtain a solution B; performing anodizing pretreatment on hydrophilic carbon cloth to obtain treated hydrophiliccarbon cloth; mixing the solution A and the solution B to form a solution C, placing the treated hydrophilic carbon cloth in the solution C for ultrasonic processing, performing hydrothermal reactionto obtain carbon fiber cloth with molybdenum diselenide growing, and calcining the carbon fiber cloth in an inert atmosphere finally. The hydrophilic carbon cloth is composited with molybdenum diselenide, a stable composite structure is constructed by a carbon fiber cloth skeleton on the basis of a synergistic effect, agglomeration of the carbon fiber cloth is inhibited, sodium ion diffusion rateis increased, more carrier transport channels are provided, structural stability during charge-discharge and high conductivity of the whole electrode are kept, a reaction kinetic process of the electrode is promoted, and accordingly, electrochemical performance of an anode material is improved.

Description

technical field [0001] The invention belongs to the technical field of electrochemical material preparation, and in particular relates to a method for preparing a molybdenum diselenide / carbon fiber cloth composite material. Background technique [0002] As today's electronic devices are becoming more flexible and thinner, it is of great significance to develop flexible electrode materials with small size, light weight, excellent processability and electrochemical performance. The anode material of the sodium ion battery is an important part of the sodium ion battery, and the composition and structure of the anode material have a decisive influence on the electrochemical performance of the sodium ion battery. For transition metal chalcogenides with a layered structure, on the one hand, they have a high reversible specific capacity, and on the other hand, they have a layered structure, which is conducive to the effective intercalation of sodium ions, resulting in a small initi...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054
CPCH01M4/366H01M4/581H01M4/625H01M10/054Y02E60/10
Inventor 曹丽云徐培光李嘉胤黄剑锋马定莹郭玲党欢罗晓敏
Owner SHAANXI UNIV OF SCI & TECH
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