Graphitized carbon-coated electrode material, preparation method thereof and application thereof as electrode material of energy storage devices

A technology of electrode material and graphitized carbon, which is applied in the field of energy storage, can solve the problems of loose connection between carbon materials and electrode materials, low degree of graphitization of carbon materials, and uneven coating, so as to speed up the process of electron kinetics, Excellent capacity, uniform coating effect

Active Publication Date: 2018-06-12
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of uneven coating and easy agglomeration of the existing carbon material-coated modified electrode materials, the interface connection between the carbon material and the electrode material is not tight, it is easy to detach and split, the degree of graphitization of the carbon material is low, and the conductivity is poor.

Method used

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  • Graphitized carbon-coated electrode material, preparation method thereof and application thereof as electrode material of energy storage devices
  • Graphitized carbon-coated electrode material, preparation method thereof and application thereof as electrode material of energy storage devices
  • Graphitized carbon-coated electrode material, preparation method thereof and application thereof as electrode material of energy storage devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] First, 1.0ml of titanium chloride solution (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyltrimethylammonium bromide (CTAB; 0.58g) were dissolved and uniformly dispersed in n-hexane (60ml) and In a mixed organic solvent composed of n-pentanol (10ml), then transferred to a 100ml reaction kettle, solvothermal in an oven at 200°C for 6h and directly vacuum-dried to obtain a mixture of organic matter and titanium dioxide precursor. Then, it was calcined at 800°C for 2h in an inert protective gas environment, the heating rate was 10°C / min, and the temperature was naturally lowered. The obtained black powder is a composite of titanium dioxide electrode material coated with graphitized carbon. figure 1 It is the physical photo of the organic matter and titanium dioxide precursor obtained after solvothermal, indicating that the obtained material is a white paste. figure 2 The scanning electron microscope image of the composite of the ...

Embodiment 2

[0046] First, 1.0ml of titanium chloride solution (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyltrimethylammonium bromide (CTAB; 0.58g) were dissolved and uniformly dispersed in n-hexane (60ml) and In a mixed organic solvent composed of n-pentanol (10ml), then transferred to a 100ml reaction kettle, solvothermal in an oven at 200°C for 6h and directly vacuum-dried to obtain a mixture of organic matter and titanium dioxide precursor. Then, it was calcined at 900°C for 2h in an inert protective gas environment, the heating rate was 10°C / min, and the temperature was naturally lowered. A black powder of titanium dioxide electrode material coated with graphitized carbon was obtained.

[0047] The composite of the obtained graphitized carbon-coated titanium dioxide electrode material is used as the negative electrode material of the sodium ion battery, and is adjusted according to the mass ratio of the active material and the conductive ag...

Embodiment 3

[0049] First, 1.0ml of titanium chloride solution (15% titanium trichloride dilute hydrochloric acid solution) and a certain amount of cetyltrimethylammonium bromide (CTAB; 0.58g) were dissolved and uniformly dispersed in n-hexane (60ml) and in a mixed organic solvent composed of n-hexanol (10ml), then transferred to a 100ml reaction kettle, and solvothermally dried in an oven at 200°C for 6h and directly vacuum-dried to obtain a mixture of organic matter and titanium dioxide precursor. Then, it was calcined at 800°C for 2h in an inert protective gas environment, the heating rate was 10°C / min, and the temperature was naturally lowered. A black powder of titanium dioxide electrode material coated with graphitized carbon was obtained. Figure 8 The transmission electron micrograph of the composite of the prepared graphitized carbon-coated titanium dioxide electrode material shows that the coating layer of titanium dioxide particles is a graphitized carbon structure, but the degr...

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Abstract

The invention discloses a graphitized carbon-coated electrode material, a preparation method thereof and application thereof as an electrode material of energy storage devices. The material is formedby coating an electrode material with graphitized carbon. The preparation method is characterized in that a mixture of an organic material and the electrode material or an electrode material precursoris put under a shielding gas atmosphere and calcined at the temperature of 800-2000 DEG C, thereby obtaining the graphitized carbon-coated electrode material. The material has a graphitized carbon coating layer which can increase the conductivity of the electrode material and improve the electron transport process in an energy storage process of the material, thereby improving the high rate performance and long cycle performance of the electrode material. The method is strong in operability, simple in technique, low in cost, high in yield and has universality, can efficiently improve the energy storage performance of the electrode material and is suitable for commercialized production.

Description

technical field [0001] The invention relates to a modified electrode material, in particular to a graphitized carbon-coated electrode material, a preparation method thereof, and an application as an electrode material of an energy storage device, belonging to the technical field of energy storage. Background technique [0002] Carbon materials, especially graphitized carbon, have a layered structure similar to graphene and have excellent electrical conductivity, and are considered to be ideal materials for improving the electron transport rate of other electrode materials. [0003] In order to improve the conductivity of electrode materials, the traditional method is to directly add carbon components such as acetylene black, carbon nanotubes or graphene to the reaction system to obtain composite electrode materials, but these materials cannot be uniformly coated or coated on the surface of carbon materials. Uniform growth, there are uneven dispersion and agglomeration; in ad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/48H01M4/62H01M10/0525H01M10/054C01B32/205C01G23/053
CPCC01G23/0536C01P2002/82C01P2004/01C01P2004/03C01P2004/04C01P2006/40H01M4/366H01M4/48H01M4/625H01M10/0525H01M10/054H01M2004/027Y02E60/10
Inventor 纪效波张艳邹国强侯红帅徐为
Owner CENT SOUTH UNIV
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