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Preparation method and application of transition metal oxide/graphitized mesocarbon microbead composite material

A technology of mesocarbon microspheres and transition metals, applied in electrochemical generators, electrical components, battery electrodes, etc., can solve the problems of material detachment and lower battery cycle performance, and achieve increased conductivity, restrained volume expansion effect, The effect of increasing capacity

Inactive Publication Date: 2019-05-07
安徽益佳通电池有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is a volume expansion effect during the charging and discharging process, which leads to the pulverization of the material and detachment from the current collector, which reduces the cycle performance of the battery.

Method used

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  • Preparation method and application of transition metal oxide/graphitized mesocarbon microbead composite material
  • Preparation method and application of transition metal oxide/graphitized mesocarbon microbead composite material
  • Preparation method and application of transition metal oxide/graphitized mesocarbon microbead composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A preparation method of nickel oxide / graphitized mesocarbon microsphere composite material, comprising the following steps:

[0038] (1) Surface oxidation treatment of graphitized mesocarbon microspheres; the graphitized mesocarbon microspheres were purchased from Shenzhen Betterray New Energy Materials Co., Ltd.;

[0039] (1-1) Under ice-water bath, add 200mL of 98% concentrated sulfuric acid to the round bottom flask, add graphitized mesophase carbon microspheres 10g and 2.5g sodium nitrate successively under mechanical stirring, then add 10g permanganate Potassium, continue stirring reaction 2h;

[0040] (1-2) Raise the temperature of the water bath to 45°C. Continue stirring for 3h;

[0041] (1-3) Under stirring conditions, add 400mL of 80°C deionized water, adjust the temperature until the temperature of the water bath is adjusted to 95°C, add 150mL of 10%wt hydrogen peroxide, and continue stirring for 3h;

[0042] (1-4) Wash the product with 5%wt dilute hydroch...

Embodiment 2

[0046] A preparation method of iron oxide / graphitized mesocarbon microsphere composite material, comprising the following steps:

[0047] (1) Carry out surface oxidation treatment with graphitized mesocarbon microspheres, step is the same as step (1) in embodiment 1;

[0048](2) Dissolve 0.5 g of ferric chloride in 25 mL of deionized water, place it in a round bottom flask, add 8 g of surface oxidized graphitized mesophase carbon microspheres, stir for 10 min, add ammonia water dropwise to pH=12, and continue stirring 10h, the reaction is over; use deionized water to wash to neutrality, filter with suction, and dry to obtain a precursor, and prepare a precursor;

[0049] (3) Put it in a tube furnace, raise the temperature from room temperature to 500° C. at a heating rate of 2° C. / min under the protection of an inert atmosphere, and keep it for 1 hour to obtain the iron oxide / graphitized mesocarbon microsphere composite material. Figure 5 XRD and SEM images of iron oxide / gra...

Embodiment 3

[0051] A preparation method of iron oxide / graphitized mesocarbon microsphere composite material, comprising the following steps:

[0052] (1) carrying out surface oxidation treatment with graphitized mesocarbon microspheres, step is the same as step (1) in embodiment 1;

[0053] (2) Take 0.5g of manganese chloride and dissolve it in 25mL of deionized water, put it in a round bottom flask, add 8g of surface oxidized graphitized mesophase carbon microspheres, stir for 20min, add ammonia water dropwise to PH=12, and continue stirring 24h, the reaction is over; use deionized water to wash to neutrality, filter with suction, and dry to obtain the precursor, and prepare the precursor;

[0054] (3) Put it in a tube furnace, raise the temperature from room temperature to 500° C. at a heating rate of 2° C. / min under the protection of an inert atmosphere, and keep it for 1 hour to obtain the manganese monoxide / graphitized mesocarbon microsphere composite material. Figure 7 XRD and SEM...

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Abstract

The invention provides a preparation method and an application of a transition metal oxide / graphitized mesocarbon microbead composite material. The preparation method comprises the steps of firstly preparing surface oxidized graphitized mesocarbon microbeads, then adding the surface oxidized graphitized mesocarbon microbeads into an aqueous solution of transition metal chloride, slowing drippinga precipitating agent, stirring, carrying out pumping filtration, drying, and carrying out calcining heat treatment in an inert atmosphere. The material can directly serve as an anode material for lithium ion batteries, and has excellent rate performance and cycle performance. The whole preparation process of the composite material is simple to operate, and the reaction conditions are easy to control.

Description

technical field [0001] The invention belongs to the technical field of lithium ion battery negative electrode material preparation, and relates to a preparation method of a transition metal oxide / graphitized mesophase carbon microsphere composite material and its application as a lithium ion battery negative electrode material. Background technique [0002] The current commercial lithium-ion battery anode materials are mainly graphitic carbon materials. However, the theoretical specific capacity of graphite carbon material is only 372mAh / g. Due to the formation of SEI film and the existence of side reactions in the battery, the actual reversible specific capacity is even lower than 372mAh / g. With the advancement of science and technology, the development of electronic products. People's requirements for lithium-ion batteries are getting higher and higher. [0003] Anode materials have become an obstacle to the development of lithium-ion batteries. People are actively look...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/50H01M4/587H01M4/62H01M10/0525
CPCY02E60/10
Inventor 王龙超崔李三周德清张翔耿斌马振向明祥朱正中李庆余
Owner 安徽益佳通电池有限公司
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