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Three-dimensional cross-linked composite material Fe3O4/FeS/rGO as well as preparation method and application thereof

A composite material, three-dimensional cross-linking technology, applied in active material electrodes, electrical components, electrochemical generators, etc., can solve problems such as volume expansion, and achieve the effects of slowing volume expansion, preventing agglomeration, and improving electrochemical performance.

Active Publication Date: 2020-11-03
JIANGXI NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention proposes a three-dimensional cross-linked composite material Fe 3 o 4 / FeS / rGO and its preparation method and application solve the technical problem of volume expansion when the electrode material reintercalates lithium. This application uses deionized water as a solvent, and utilizes graphene oxide itself to have good conductivity, large specific surface area and The nature of more functional groups, the Fe 3 o 4 / FeS octahedral particles are uniformly dispersed on the rGO sheet, and Fe 3 o 4 / FeS / rGO composite

Method used

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  • Three-dimensional cross-linked composite material Fe3O4/FeS/rGO as well as preparation method and application thereof
  • Three-dimensional cross-linked composite material Fe3O4/FeS/rGO as well as preparation method and application thereof
  • Three-dimensional cross-linked composite material Fe3O4/FeS/rGO as well as preparation method and application thereof

Examples

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Effect test

Embodiment 1

[0034] The three-dimensional cross-linked composite material Fe of the present embodiment 3 o 4 / FeS / rGO preparation method, the steps are as follows:

[0035] (1) Under the condition of ultrasonic stirring, Fe(NO 3 ) 3 9H 2 O and 0.047g / mL of urotropine in deionized aqueous solution, then Fe(NO 3 ) 3 The solution was slowly added dropwise to the urotropine solution to obtain a mixed solution Ⅰ;

[0036] (2) Add 0.01 g of sublimed sulfur and 0.5 g of graphene oxide dispersion (10 mg / 1 g) to the mixed solution I prepared in step (1) respectively, and ultrasonically mix to obtain mixed solution II;

[0037] (3) Pour the mixed solution II of step (2) into the reaction kettle, raise the temperature from room temperature to 160°C, keep it warm for 10 hours, cool to room temperature after the reaction, wash the product until neutral, and dry it in an oven at 60°C for 12 hours to obtain Solid product I;

[0038] (4) The solid product I of step (3) was heated to 500°C at a hea...

Embodiment 2

[0044] The three-dimensional cross-linked composite material Fe of the present embodiment 3 o 4 / FeS / rGO preparation method, the steps are as follows:

[0045] (1) Under the condition of ultrasonic stirring, Fe(NO 3 ) 3 9H 2 O and 0.068g / mL of urotropine in deionized aqueous solution, then Fe(NO 3 ) 3 The solution was slowly added dropwise to the urotropine solution to obtain a mixed solution Ⅰ;

[0046] (2) Add 0.01 g of sublimed sulfur and 2 g of graphene oxide dispersion (10 mg / 1 g) to the mixed solution I prepared in step (1) respectively, and ultrasonically mix to obtain mixed solution II;

[0047] (3) Pour the mixed solution II of step (2) into the reaction kettle, raise the temperature from room temperature to 160°C, keep it warm for 10 hours, cool to room temperature after the reaction, wash the product until neutral, and dry it in an oven at 60°C for 12 hours to obtain Solid product I;

[0048] (4) The solid product I of step (3) was heated to 500°C at a heati...

Embodiment 3

[0050] The three-dimensional cross-linked composite material Fe of the present embodiment 3 o 4 / FeS / rGO preparation method, the steps are as follows:

[0051] (1) Under the condition of ultrasonic stirring, Fe(NO 3 ) 3 9H 2 O and 0.068g / mL of urotropine in deionized aqueous solution, then Fe(NO 3 ) 3 The solution was slowly added dropwise to the urotropine solution to obtain a mixed solution Ⅰ;

[0052] (2) Add 0.15 g of sublimed sulfur and 1 g of graphene oxide dispersion (10 mg / 1 g) to the mixed solution I prepared in step (1) respectively, and ultrasonically mix to obtain mixed solution II;

[0053] (3) Pour the mixed solution II of step (2) into the reaction kettle, raise the temperature from room temperature to 160°C, keep it warm for 10 hours, cool to room temperature after the reaction, wash the product until neutral, and dry it in an oven at 60°C for 12 hours to obtain Solid product I;

[0054] (4) The solid product I of step (3) was heated to 500°C at a heati...

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Abstract

The invention belongs to the field of new materials, particularly relates to preparation of an energy storage material, and particularly relates to a three-dimensional cross-linked composite materialFe3O4 / FeS / rGO as well as a preparation method and application thereof. According to the present invention, the technical problem of volume expansion during lithium re-intercalation of an electrode material is solved, deionized water is used as a solvent, the octahedral particles of Fe3O4 / FeS are uniformly dispersed on an rGO sheet layer by utilizing the properties of good conductivity, large specific surface area and more functional groups of reduced graphene oxide, and the Fe3O4 / FeS / rGO composite material is prepared. A conductive network structure provided by rGO provides a larger contact area for an electrolyte and an electrode, and rapid transfer of charges and Li <+> is promoted. Moreover, a larger space gap is formed in the composite material, the three-dimensional cross-linked composite structure is formed, and the volume expansion of the material during lithium intercalation is relieved, and therefore the electrochemical performance of a battery is effectively improved.

Description

technical field [0001] The invention belongs to the field of new materials, in particular to the preparation of energy storage materials, in particular to a three-dimensional cross-linked composite material Fe 3 o 4 / FeS / rGO and its preparation method and application. Background technique [0002] Lithium-ion batteries have become indispensable electrochemical energy storage devices in modern life due to their high energy density and long cycle life. Lithium-ion batteries have excellent characteristics such as light weight, large capacity, no memory effect, good cycle performance, environmental friendliness, and structural diversity, so they have become the preferred power source for portable electronic appliances such as cameras, mobile phones, and notebook computers. EV), hybrid electric vehicles (HEV), space technology and the best power source for high-end energy storage systems. However, with the development of consumer electronics and electric vehicles, the current ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/52H01M4/58H01M4/583H01M4/62H01M10/0525
CPCH01M4/362H01M4/52H01M4/5815H01M4/583H01M4/625H01M10/0525H01M2004/027Y02E60/10
Inventor 王素琴高芮芮许招秀黎泓波侯豪情
Owner JIANGXI NORMAL UNIV
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