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Interlayer material as well as preparation method and application thereof

A technology of interlayer materials and substrate materials, applied in electrical components, non-aqueous electrolyte batteries, circuits, etc., can solve the problems of unfavorable battery electrochemical performance and slow conversion, and achieve superior electrocatalytic activity, strong adsorption, and good cycle performance and the effect of rate performance

Pending Publication Date: 2021-11-23
中科南京绿色制造产业创新研究院 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although those materials that can adsorb or separate polysulfides have a certain inhibitory effect on the shuttle effect of polysulfides, the long-chain polysulfides to solid Li 2 The conversion of S is still slow, which is not conducive to improving the electrochemical performance of the battery

Method used

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  • Interlayer material as well as preparation method and application thereof
  • Interlayer material as well as preparation method and application thereof
  • Interlayer material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0062] This embodiment provides a kind of preparation method of interlayer material, and described preparation method specifically comprises the following steps:

[0063] (1) Prepare 2mmol / L mixed metal salt solution, dissolve a certain quality of cobalt chloride hexahydrate and ferric chloride hexahydrate in 400mL deionized water, stir at room temperature until the solution is clear, and obtain an orange-yellow solution;

[0064] (2) Cut the commercial bacterial cellulose gel sheet with a thickness of 3mm into a size of 8*12cm, and soak it in the above-mentioned mixed solution for 2h, and a magnetic stirring of 600r / min is required in the process;

[0065] (3) The gel sheet soaked in the metal salt solution obtained in step (2) is clamped up and down with smooth glass sheets of the same size, and the two ends are fixed with the same pressure, and the thickness of the gel sheet after soaking is controlled by an appropriate pressure. At about 3mm, use filter paper to absorb exc...

Embodiment 2

[0071] This embodiment provides a kind of preparation method of interlayer material, and described preparation method specifically comprises the following steps:

[0072] (1) Prepare a 3mmol / L mixed metal salt solution, dissolve a certain quality of cobalt chloride hexahydrate and ferric chloride hexahydrate in 400mL deionized water, stir at room temperature until the solution is clear, and obtain an orange-yellow solution;

[0073] (2) Cut the commercial bacterial cellulose gel sheet with a thickness of 3mm into 8*12cm size, and soak it in the above-mentioned mixed solution for 1h, and a magnetic stirring of 500r / min is required in the process;

[0074] (3) The gel sheet soaked in the metal salt solution obtained in step (2) is clamped up and down with smooth glass sheets of the same size, and the two ends are fixed with the same pressure, and the thickness of the gel sheet after soaking is controlled by an appropriate pressure. At about 3mm, use filter paper to absorb excess...

Embodiment 3

[0080] This embodiment provides a kind of preparation method of interlayer material, and described preparation method specifically comprises the following steps:

[0081] (1) Prepare a mixed metal salt solution of 4 mmol / L, dissolve a certain quality of cobalt chloride hexahydrate and ferric chloride hexahydrate in 400 mL of deionized water, stir at room temperature until the solution is clear, and obtain an orange-yellow solution;

[0082] (2) Cut the commercial bacterial cellulose gel sheet with a thickness of 3mm into a size of 8*12cm, and soak it in the above-mentioned mixed solution for 1.5h, and a magnetic stirring of 550r / min is required in the process;

[0083] (3) The gel sheet soaked in the metal salt solution obtained in step (2) is clamped up and down with smooth glass sheets of the same size, and the two ends are fixed with the same pressure, and the thickness of the gel sheet after soaking is controlled by an appropriate pressure. At about 3mm, use filter paper t...

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Abstract

The invention provides an interlayer material and a preparation method and application thereof. The interlayer material comprises a three-dimensional carbon nanofiber substrate material, cobalt-iron alloy nanoparticles are uniformly distributed on the surface and in the three-dimensional carbon nanofiber substrate material, and the cobalt-iron alloy nanoparticles are of nearly spherical structures. The preparation method comprises the following steps of soaking a bacterial cellulose gel sheet in a metal salt aqueous solution to obtain a precursor, and sequentially carrying out freeze drying and high-temperature calcination treatment on the precursor to obtain the interlayer material. According to the invention, the combination of well dispersed alloy nanoparticles and a graphitized carbon network greatly reduces the contact resistance, not only the soluble intermediate polysulfide can be effectively contacted through the porous structure of the carbon network, the utilization of sulfur is promoted, but also the electrochemical kinetics of sulfur-containing species in the electro-catalysis process can be accelerated.

Description

technical field [0001] The invention belongs to the technical field of batteries and relates to the design of interlayer materials for batteries, in particular to an interlayer material and its preparation method and application. Background technique [0002] At present, human's demand for energy is increasing sharply, and the excessive exploitation and use of non-renewable energy has caused serious environmental problems. The development and utilization of renewable and sustainable energy for power generation has attracted widespread attention. Lithium-sulfur batteries were first proposed in the early 1960s, due to their high theoretical energy density (2600Whkg -1 ) and specific capacity (1675mAhg -1 ), aroused widespread interest. Moreover, sulfur is abundant, low-cost, and environmentally friendly, making it a promising energy storage device. Despite these advantages, there are also some disadvantages that hinder the practical application of lithium-sulfur batteries. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M10/052B22F1/00B22F9/22
CPCH01M4/625H01M4/626H01M10/052B22F9/22Y02E60/10
Inventor 王宝高宁李文彪
Owner 中科南京绿色制造产业创新研究院
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