A kind of spherical s/c@moo2 composite material and its preparation method and application

A composite material and spherical technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problems of limited energy density and unsatisfactory technological development, and achieve the effect of simple equipment requirements, simple and feasible methods, and good conductivity

Active Publication Date: 2019-07-09
YANGZHOU UNIV
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Problems solved by technology

However, in the fields of electric vehicles, aerospace and national defense equipment, the current commercial lithium-ion secondary batteries are limited by the energy density, which is far from meeting the needs of technological development.

Method used

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  • A kind of spherical s/c@moo2 composite material and its preparation method and application
  • A kind of spherical s/c@moo2 composite material and its preparation method and application
  • A kind of spherical s/c@moo2 composite material and its preparation method and application

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Embodiment Construction

[0026] 1. Preparation process:

[0027] 1) Preparation of TBA 3 PMo 12 o 40 Composite material: 1.843g phosphomolybdic acid (H 3 Mo 12 o 40 P) and 0.996g tetrabutylammonium bromide (C 16 h 36 NBr) was dissolved in deionized water and reacted in a water bath for 0.5-1h under magnetic stirring. After the reaction, a yellow precipitate was obtained by suction filtration, and then vacuum-dried at 60°C to obtain 2.610g TBA 3 PMo 12 o 40 .

[0028] 2) Preparation of SiO 2 / C@TBA 3 PMo 12 o 40 Composite material: 20mgSiO 2 / C was added to 25mL toluene solution, magnetically stirred for 2h, and left to stand for 30min to obtain SiO 2 / C and toluene mixed solution. 20mg TBA 3 PMo 12 o 40 Dissolve in 25mL acetonitrile solution, then add this mixed solution to SiO 2 / C and toluene mixed solution, filtered and dried to obtain 36mgSiO 2 / C@TBA 3 PMo 12 o 40 composite material.

[0029] 3) Preparation of SiO 2 / C@MoO 2 Composite material: 36mgSiO 2 / C@TBA 3 PMo ...

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Abstract

The invention relates to a spherical S / C@MoO 2 Composite materials and their preparation methods and applications. The composite material is prepared through the following steps: 1) reacting phosphomolybdic acid and tetrabutylammonium bromide to obtain TBA 3 PMo 12 o 40 ; 2) SiO 2 / C is added in the toluene solution; 3) TBA 3 PMo 12 o 40 Dissolved in the acetonitrile solution, this mixed solution is added in step 2) to obtain SiO 2 / C@TBA 3 PMo 12 o 40 ; 4) The product is calcined at high temperature to obtain SiO 2 / C@MoO 2 ;5) C@MoO was obtained by etching with HF 2 ;6) Convert C@MoO 2 Mix and grind with sublimed sulfur to obtain S / C@MoO 2 composite material. The composite material can be used as a cathode material for lithium-sulfur batteries. The method of the invention is simple and feasible, and the cost is low; the prepared composite material has uniform appearance, high specific surface area and large pore volume, and has the effect of improving the coulombic efficiency and cycle stability of the battery.

Description

technical field [0001] The invention belongs to the field of chemical batteries, in particular to a spherical S / C@MoO 2 Composite materials and their preparation methods and applications. Background technique [0002] With the increasing depletion of fossil fuels and the increasingly serious environmental problems caused by their combustion, it is urgent to find new energy sources. At the same time, the rapid development of portable devices such as mobile phones, notebook computers, digital cameras, and electric vehicles, and the Secondary batteries are widely used. Among them, lithium-ion secondary batteries, which appeared in the 1990s, are a new generation of chemical power sources recognized in the world, and have been successfully commercialized and rapidly developed in the field of portable devices. However, in the fields of electric vehicles, aerospace and national defense equipment, the current commercial lithium-ion secondary batteries are limited by energy densit...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/052
CPCH01M4/362H01M4/38H01M4/625H01M4/628H01M10/052Y02E60/10
Inventor 倪鲁彬段素芹杨光王伟张颖徐红杰赵红霞刁国旺
Owner YANGZHOU UNIV
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