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Nano-composite material with molybdenum trioxide@molybdenum disulfide core-shell heterostructure, and preparation method and application thereof

A nanocomposite material, molybdenum trioxide technology, applied in the field of nanomaterials, can solve problems such as low specific capacity and limited energy density of lithium-ion batteries, achieve low production costs, improve cycle stability and rate performance, and have good dispersion Effect

Active Publication Date: 2018-09-18
ANHUI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] At present, with the continuous rapid development of electronic products, the requirements for batteries are getting higher and higher, and the energy density and power density of traditional batteries are far from meeting commercial requirements. However, lithium-ion battery negative materials represented by graphite , because of its low theoretical specific capacity (370mAh / g), which greatly limits the energy density of lithium-ion batteries

Method used

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  • Nano-composite material with molybdenum trioxide@molybdenum disulfide core-shell heterostructure, and preparation method and application thereof
  • Nano-composite material with molybdenum trioxide@molybdenum disulfide core-shell heterostructure, and preparation method and application thereof
  • Nano-composite material with molybdenum trioxide@molybdenum disulfide core-shell heterostructure, and preparation method and application thereof

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Effect test

Embodiment 1

[0038] A nanocomposite material of molybdenum trioxide@molybdenum disulfide core-shell heterostructure, comprising the following steps:

[0039] S1: Dissolve sodium molybdate in twice-distilled water and add hydrochloric acid with a mass concentration of 36%, stir for 30 minutes, and mix well to obtain a mixed solution. The concentration of sodium molybdate in the mixed solution is 0.2M, and the concentration of HCl is 0.4M; Transfer the solution to a 100mL stainless steel polytetrafluoroethylene high-temperature reaction kettle, and conduct a hydrothermal reaction at 180°C for 12 hours. Take out the reaction kettle and cool it to room temperature naturally. After that, the product is collected by centrifugation, and then washed with water and absolute ethanol for 3-5 times , and then put the product into a vacuum drying oven at 60°C for 12 hours to obtain a nanoribbon-shaped molybdenum trioxide precursor. The SEM image is as follows figure 1 As shown, it can be seen from the ...

Embodiment 2

[0045] A method for preparing a nanocomposite material of molybdenum trioxide@molybdenum disulfide core-shell heterostructure, comprising the following steps:

[0046] S1: Dissolve sodium molybdate in double distilled water and add hydrochloric acid with a mass concentration of 36%, stir for 30 minutes, and after mixing, a mixed solution is obtained. The concentration of sodium molybdate in the mixed solution is 0.2M, and the concentration of HCl is 0.4M; Transfer the mixed solution to a 100mL stainless steel polytetrafluoroethylene high-temperature reaction kettle, and conduct a hydrothermal reaction at 180°C for 12 hours. Take out the reaction kettle and cool it down to room temperature naturally. After that, the product is collected by centrifugation, and then washed with water and absolute ethanol for 3-5 times respectively. , and then put the product into a vacuum drying oven at 60° C. for 12 hours to obtain a nanoribbon-shaped molybdenum trioxide precursor.

[0047] S2: ...

Embodiment 3

[0049] A method for preparing a nanocomposite material of molybdenum trioxide@molybdenum disulfide core-shell heterostructure, comprising the following steps:

[0050] S1: Dissolve sodium molybdate in twice-distilled water and add hydrochloric acid with a mass concentration of 36%, stir for 30 minutes, and mix well to obtain a mixed solution. The concentration of sodium molybdate in the mixed solution is 0.2M, and the concentration of HCl is 0.4M; The solution was transferred to a 100mL stainless steel polytetrafluoroethylene high-temperature reaction kettle, and reacted hydrothermally at 180°C for 12 hours. The reaction kettle was taken out and cooled to room temperature naturally. After that, the product was collected by centrifugation, and then washed with water and absolute ethanol for 3-5 times respectively. Then put the product into a vacuum drying oven at 60°C and dry for 12 hours to obtain a nanoribbon-shaped molybdenum trioxide precursor.

[0051] S2: Add the nanoribb...

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Abstract

The invention provides a nano-composite material with a molybdenum trioxide@molybdenum disulfide core-shell heterostructure, and a preparation method and an application thereof. The preparation methodcomprises the following steps: adding sodium molybdate and hydrochloric acid into redistilled water, used as a reaction solvent, in a closed high-temperature and high-pressure reactor, heating the reaction system to produce a high-temperature and high-pressure environment in order to prepare a nano-ribbon molybdenum trioxide precursor, adding the nano-ribbon molybdenum trioxide to redistilled water used as the reaction solvent, adding thiourea and hydrochloric acid, and heating the reaction system to generate high-temperature and high-pressure environment in order to prepare the three-dimensional porous sheet molybdenum oxide-molybdenum disulfide core-shell heterostructure nano-composite material. Compared with nano-composite materials in the prior art, the nano-composite material in theinvention has the advantages of high purity, good and controllable dispersibility, low production cost, good reproducibility, large specific surface area, facilitation of the infiltration of an electrode material with an electrolyte, and great potential application values in the energy storage field.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, and specifically relates to a nanocomposite material with a molybdenum trioxide@molybdenum disulfide core-shell heterostructure, a preparation method and an application thereof. Background technique [0002] Rechargeable batteries, especially lithium-ion batteries, are subverting people's lifestyles and energy utilization methods, opening a new chapter in the new energy era for mankind. The development of lithium-ion battery technology has greatly promoted the popularization and application of smart phones in recent years, and its high energy density supports the development of smart phones in the direction of thinner, more convenient and more functional. In the field of transportation, the high energy density of lithium-ion batteries, supplemented by advanced battery management systems, has made new energy electric vehicles very popular. In addition, lithium-ion batteries and other high-e...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/13
CPCH01M4/13H01M4/362Y02E60/10
Inventor 张小俊蔡国辉
Owner ANHUI NORMAL UNIV
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