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A method for preparing a flexible film, the prepared flexible film, and a battery

A flexible membrane and battery technology, applied in battery electrodes, secondary batteries, active material electrodes, etc., can solve the problem of less research on flexible membrane electrodes, achieve broad practical value and market prospects, good cycle performance, high sodium storage The effect of capacity

Active Publication Date: 2022-06-21
ANHUI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The current research on metal sulfides is mainly to improve their mass specific capacity, but there is less research on flexible membrane electrodes of metal sulfides

Method used

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  • A method for preparing a flexible film, the prepared flexible film, and a battery
  • A method for preparing a flexible film, the prepared flexible film, and a battery
  • A method for preparing a flexible film, the prepared flexible film, and a battery

Examples

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Comparison scheme
Effect test

Embodiment 1

[0056] The preparation method of the flexible film includes the following steps:

[0057] Disperse 0.1g of terephthalic acid in 6ml of N,N-dimethylformamide, stir and dissolve at 25°C, add 0.2786g vanadium acetylacetonate and 0.3052g thioacetamide, stir and dissolve, add 0.5428g Polyacrylonitrile, stirred for 18h to obtain a uniformly mixed precursor solution, the precursor solution was spun in an industrialized electrospinning equipment, spinning conditions: voltage 30kV, liquid moving speed 100cm s -1 ; Aperture 0.6mm; Ambient humidity 30%; Spinning temperature 30°C. The obtained precursor film and sulfur powder (mass ratio of 1:10) were calcined in nitrogen at 700 °C for 2 h to obtain a flexible film material.

[0058] figure 1 is a digital photograph of the film of the as-prepared precursor. figure 2 is a digital photograph of the prepared flexible film. image 3 It is a foldable digital photo of the prepared flexible film, showing very good flexibility. Figure 4 is...

Embodiment 2

[0061] The preparation method of the flexible film includes the following steps:

[0062] Disperse 0.1g of terephthalic acid in 6ml of N,N-dimethylformamide, stir and dissolve at 25°C, add 0.2786g vanadium acetylacetonate and 0.3052g thioacetamide, stir and dissolve, add 0.5428g Polyacrylonitrile, stirred for 18h to obtain a uniformly mixed precursor solution, the precursor solution was spun in an industrialized electrospinning equipment, spinning conditions: voltage 30kV, liquid moving speed 100cm s -1 ; Aperture 0.6mm; Ambient humidity 30%; Spinning temperature 30°C. The obtained precursor film and sulfur powder (mass ratio, 1:10) were calcined in nitrogen at 800 °C for 2 h. A flexible film material is obtained.

[0063] The prepared flexible membrane material was used as the positive active material, the sodium sheet was the negative electrode (the capacity of the negative electrode was much larger than that of the positive electrode sheet), the positive electrode and the...

Embodiment 3

[0065] Disperse 0.1g of terephthalic acid in 6ml of N,N-dimethylformamide, stir and dissolve at 25°C, add 0.2786g vanadium acetylacetonate and 0.3052g thioacetamide, stir and dissolve, add 0.5428g Polyacrylonitrile, stirred for 18h to obtain a uniformly mixed precursor solution, the precursor solution was spun in an industrialized electrospinning equipment, spinning conditions: voltage 30kV, liquid moving speed 100cm s -1 ; Aperture 0.6mm; Ambient humidity 30%; Spinning temperature 30°C. The obtained precursor film and sulfur powder (mass ratio, 1:10) were calcined in nitrogen at 600 °C for 2 h. A flexible film material is obtained.

[0066] The prepared flexible membrane material was used as the positive active material, the sodium sheet was the negative electrode (the capacity of the negative electrode was much larger than that of the positive electrode sheet), the positive electrode and the sodium sheet were separated by a glass fiber separator, and 1M NaClO was used. 4 D...

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Abstract

The invention discloses a method for preparing a flexible film, which relates to the technical field of anode materials for sodium ion batteries, and comprises the following steps: (1) dispersing an organic acid in N,N-dimethylformamide to form a mixed solution; (2) The acetylacetonate-based complex is dissolved in mixed solution 1 to form mixed solution 2; (3) thioacetamide is dissolved in mixed solution 2 to form mixed solution 3; (4) polyacrylonitrile is dispersed in mixed solution 3 to obtain Mixing Solution 4; (5) Spinning Mixed Solution 4 through industrial electrospinning equipment to form a precursor film; (6) Calcining the precursor film and sulfur powder under an inert atmosphere to obtain a flexible film. The present invention also provides a flexible film prepared by the above method, and a battery including the flexible film. The invention has the advantages that: as the electrode material of the sodium (ion) battery, the flexible film has the advantages of low cost, abundant raw materials, simple preparation method, suitable for large-scale industrial production, convenient storage and strong cycle stability.

Description

technical field [0001] The invention relates to the technical field of negative electrode materials for sodium ion batteries, in particular to a preparation method of a flexible film, the obtained flexible film and a battery. Background technique [0002] Flexible devices have very important applications in industrial equipment, electronic equipment for personal life, as well as in bionics and biointegration. Flexible electrodes have also attracted great attention in recent years. The commonly used flexible substrates include graphene, carbon nanofibers, commercial carbon cloth, and metals, etc. These materials are expensive and the synthesis technology is complicated, so the cost is high. At the same time, the commonly used composite methods of high-capacity materials and flexible materials, such as high-temperature hydrothermal method, dipping method and electrodeposition method, usually face the problems of large energy consumption, uneven load, and complex process. Ther...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/1397H01M4/62H01M4/58H01M4/136H01M10/054D01D5/00B82Y30/00
CPCH01M4/1397H01M4/136H01M4/5815H01M4/625H01M10/054B82Y30/00D01D5/003H01M2004/027H01M2004/021H01M2004/022Y02E60/10
Inventor 郑方才姚阁王俊中
Owner ANHUI UNIVERSITY
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