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Flexible N/SnOx@ rGO composite material based on biological material substrate, preparation method and application thereof

A technology of composite materials and biomaterials, applied in the field of flexible N/SnOx@rGO composite materials and its preparation, can solve the problems of poor electrode stability, large volume change, poor conductivity, etc., and achieve strong crystallinity, simple process, and small size Effect

Active Publication Date: 2020-07-10
SHAANXI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a flexible N / SnOx@rGO composite material based on a biomaterial substrate and its preparation method and application in view of the deficiencies in the above-mentioned prior art, to solve the problem of SnO 2 Large volume changes during charge and discharge, poor conductivity, and poor electrode stability

Method used

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  • Flexible N/SnOx@ rGO composite material based on biological material substrate, preparation method and application thereof
  • Flexible N/SnOx@ rGO composite material based on biological material substrate, preparation method and application thereof
  • Flexible N/SnOx@ rGO composite material based on biological material substrate, preparation method and application thereof

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preparation example Construction

[0037] The invention provides a method for preparing a flexible N / SnOx@rGO composite material based on a biomaterial substrate, comprising the following steps:

[0038]S1, uncarbonized absorbent cotton substrate SnO x Preparation of nanostructures;

[0039] The absorbent cotton was pretreated, the medical absorbent cotton was peeled off and cut into 3cm×3cm×0.1cm cubes, washed alternately with deionized water and ethanol three times, and dried at 30°C to obtain absorbent cotton A; then, SnCl 4 ·5H 2 O and deionized water were mixed according to the ratio of (0.5-2.0) g: (50-100) mL, and after stirring for 1 hour, solution B was obtained; solution B was mixed with 6 mL of 25% ammonia water to obtain solution C; absorbent cotton A Put it into solution C for mixing and ultrasonic treatment for 1 to 3 hours to obtain absorbent cotton D, that is, non-carbonized absorbent cotton substrate SnO x Nano-structure;

[0040] S2, flexible carbon substrate N / SnO x Preparation of nanost...

Embodiment 1

[0053] S1, uncarbonized absorbent cotton substrate SnO x Preparation of nanostructures:

[0054] First, pretreat the absorbent cotton, peel off the medical absorbent cotton and cut it into a cube of 3cm×3cm×0.1cm, wash it alternately with deionized water and ethanol three times, and dry it at 30°C to obtain absorbent cotton A; then, 0.6g SnCl 4 ·5H 2 O and 60ml of deionized water were mixed, stirred for 1 hour to obtain solution B; solution B was mixed with 6ml of 25% ammonia water to obtain solution C; absorbent cotton A was put into solution C for mixing and then ultrasonically treated for 1 hour to obtain absorbent cotton d. That is, uncarbonized absorbent cotton substrate SnO x Nano-structure.

[0055] S2, flexible carbon substrate N / SnO x Preparation of nanostructures:

[0056] Absorbent cotton D was freeze-dried to obtain absorbent cotton E; finally, absorbent cotton E was carbonized in a tube furnace at 700°C for 5 hours, and 200 sccm of N 2 Obtain carbonized ab...

Embodiment 2

[0063] S1, uncarbonized absorbent cotton substrate SnO x Preparation of nanostructures:

[0064] First, pretreat the absorbent cotton, peel off the medical absorbent cotton and cut it into a cube of 3cm×3cm×0.1cm, wash it alternately with deionized water and ethanol three times, and dry it at 30°C to obtain absorbent cotton A; then, 0.8g SnCl 4 ·5H 2 O and 60mL deionized water were mixed, stirred for 1 hour to obtain solution B; solution B was mixed with 6mL 25% ammonia water to obtain solution C; absorbent cotton A was put into solution C for mixing and then ultrasonically treated for 1 hour to obtain absorbent cotton d. That is, uncarbonized absorbent cotton substrate SnO x Nano-structure.

[0065] S2, flexible carbon substrate N / SnO x Preparation of nanostructures:

[0066] Absorbent cotton D was freeze-dried to obtain absorbent cotton E; finally, absorbent cotton E was carbonized in a tube furnace at 700°C for 5 hours, and 200 sccm of N 2 Obtain carbonized absorben...

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Abstract

The invention discloses a flexible N / SnOx@rGO composite material based on a biological material substrate, a preparation method and application thereof. The N / SnOx (at) rGO composite material is prepared by adopting a freeze drying method and a CVD (Chemical Vapor Deposition) method. A biological material degreasing cotton is selected as a carbon substrate, the material is cheap and easy to obtain, and the synthesis process is simple and easy to operate. The synthesized N / SnOx particles are small in size and high in crystallinity, in addition, the carbon substrate serves as a conductive carbonnetwork, electron transmission is facilitated, and rGO wrapping the carbon fibers can prevent the N / SnOx particles from falling off and can also serve as an electron transmission bridge to be connected with the carbon fiber network.

Description

technical field [0001] The invention belongs to the technical field of sodium-ion batteries, and in particular relates to a flexible N / SnOx@rGO composite material based on a biomaterial substrate and a preparation method and application thereof. Background technique [0002] Lithium-ion batteries have the advantages of high energy density, high average output voltage, small self-discharge, and excellent cycle stability. They are widely used in mobile phones, notebook computers, and power vehicles. At present, the theoretical capacity of commercial graphite-based anode materials is only 372mAh / g, which cannot meet the demand for future high-capacity batteries. In addition, the shortage of lithium reserves also restricts the long-term development of lithium-ion batteries. In contrast, sodium has abundant reserves and low cost, so sodium-ion batteries have gradually become a research hotspot in the field of energy in recent years. Relative to lithium ions, the radius of sodiu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/48H01M4/1391H01M4/131H01M10/04H01M10/054
CPCH01M4/131H01M4/1391H01M4/483H01M4/624H01M4/625H01M4/628H01M10/0427H01M10/054H01M2004/027Y02E60/10Y02P70/50
Inventor 杨艳玲孙瑜陈志刚朱建锋陈华军锁国权冯雷叶晓慧张荔侯小江邹鑫鑫和茹梅毕雅欣
Owner SHAANXI UNIV OF SCI & TECH
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