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Graphite carbon/ferric oxide composite material and its preparation method and application

A technology of ferroferric oxide and composite materials, which is applied in the field of new energy materials, can solve the problems of complex synthesis process, inability to meet industrial mass production, and high cost, and achieve the effect of simple preparation process, good cycle stability, and low cost

Active Publication Date: 2019-01-25
ADVANCED TECHNOLOGY & MATERIALS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above materials solve the problems of cycle performance and rate performance, the synthesis process is relatively complicated and the cost is high, which cannot meet the needs of industrial mass production.

Method used

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  • Graphite carbon/ferric oxide composite material and its preparation method and application
  • Graphite carbon/ferric oxide composite material and its preparation method and application
  • Graphite carbon/ferric oxide composite material and its preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0041] The present embodiment prepares a kind of graphite carbon / ferric oxide composite material, and the steps are as follows:

[0042] (1) Take by weighing 0.3g ferrous gluconate and 1.5g F127 respectively, then the two are added to 15ml deionized water, that is, the mass ratio of ferrous gluconate, F127 and deionized water is 1:5:50, after Mix well to obtain solution I.

[0043] (2) Add 0.325 g of polyetherimide to solution I, stir for 30 minutes, and mix uniformly to obtain solution II; freeze-dry solution II for 12 hours to obtain solid powder.

[0044] (3) Under an Ar atmosphere, anneal the solid powder, that is, slowly heat the solid powder to 700°C, keep it warm for 4 hours, and then cool it to room temperature, wherein the heating rate is 2°C / min, and the cooling rate is 5°C / min; finally The obtained black solid powder is the nano-particles of graphitic carbon wrapped ferric oxide.

[0045] Figure 4 For the transmission electron micrograph picture (i.e. TEM figure...

Embodiment 2

[0049] The present embodiment prepares a kind of graphite carbon / ferric oxide composite material, and the steps are as follows:

[0050] (1) Take by weighing 0.3g ferrous gluconate and 1.5g F127 respectively, then the two are added to 15ml deionized water, that is, the mass ratio of ferrous gluconate, F127 and deionized water is 1:5:50, after Mix well to obtain solution I.

[0051] (2) Add 0.4 g of polyetherimide to solution I, stir for 30 minutes, and mix uniformly to obtain solution II; freeze-dry solution II for 12 hours to obtain solid powder.

[0052] (3) Under an Ar atmosphere, anneal the solid powder, that is, slowly heat the solid powder to 700°C, keep it warm for 4 hours, and then cool it to room temperature, wherein the heating rate is 2°C / min, and the cooling rate is 5°C / min; finally The obtained black solid powder is the nano-particles of graphitic carbon wrapped ferric oxide.

[0053] The specific morphology of the composite material prepared in this example is:...

Embodiment 3

[0056] The present embodiment prepares a kind of graphite carbon / ferric oxide composite material, and the steps are as follows:

[0057] (1) Take by weighing 0.3g ferrous gluconate and 1.5g F127 respectively, then the two are added to 15ml deionized water, that is, the mass ratio of ferrous gluconate, F127 and deionized water is 1:5:50, after Mix well to obtain solution I.

[0058] (2) Add 0.28 g of polyetherimide to solution I, stir for 30 minutes, and mix uniformly to obtain solution II; freeze-dry solution II for 12 hours to obtain solid powder.

[0059] (3) Under an Ar atmosphere, anneal the solid powder, that is, slowly heat the solid powder to 700°C, keep it warm for 4 hours, and then cool it to room temperature, wherein the heating rate is 2°C / min, and the cooling rate is 5°C / min; finally The obtained black solid powder is the nano-particles of graphitic carbon wrapped ferric oxide.

[0060] The specific appearance of the composite material prepared in this embodiment...

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Abstract

The invention discloses a graphite carbon / ferroferric oxide composite and a preparation method and application thereof. The composite is spherical particles of a core-shell structure, and in the spherical particles of the core-shell structure, ferroferric oxide particles are adopted as cores, and graphite carbon is adopted as shells. The preparation method comprises the following steps that, 1, ferrous gluconate and Pluronic F127 are added to deionized water to be mixed, and a solution I is obtained; 2, polyetherimide is added to the solution I to be mixed evenly, a solution II is obtained, and the solution II is dried to obtain solid powder; 3, in the inert atmosphere, the solid powder is annealed, and the graphite carbon / ferroferric oxide composite is obtained. The preparation process is simple and convenient, operation is easy, the preparation period is short, the requirement for experiment equipment is low, the graphite carbon / ferroferric oxide composite is suitable for volume production, and the prepared graphite carbon / ferroferric oxide composite has excellent electrochemical performance and can be used for lithium ion battery anode materials.

Description

technical field [0001] The invention relates to a preparation method of a lithium-ion battery electrode material, in particular to a graphite carbon / ferric oxide composite material and a preparation method and application thereof, belonging to the technical field of new energy materials. Background technique [0002] Lithium-ion batteries have been widely used because of their good cycle performance, high capacity and no memory effect. With the rapid development of electric vehicles and the increasing demand for high-power power batteries, the research and development of a new generation of high-capacity, low-cost power lithium-ion batteries is particularly urgent. Graphite, as the anode material of lithium-ion batteries commercialized today, has a relatively low theoretical capacity (~370mAh / g) and cannot meet the growing demands of power batteries. In recent years, researchers have developed a series of high-capacity anode materials based on conversion reactions, among wh...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/52H01M4/583H01M4/62H01M4/139H01M10/0525
CPCH01M4/139H01M4/362H01M4/52H01M4/583H01M4/625H01M10/0525Y02E60/10
Inventor 戚雯李轩曾宏武英况春江周少雄
Owner ADVANCED TECHNOLOGY & MATERIALS CO LTD
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