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NiFe2O4 nano composite material and preparation method and application thereof

A technology of nanocomposite materials and composites, which is applied in the field of NiFe2O4 nanocomposite materials and its preparation, and can solve the problems of not being able to provide good charge-discharge cycle performance of electrodes.

Active Publication Date: 2020-02-21
FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional carbon materials (including graphene) and NiFe 2 o 4 Strategies of simple mixing or coating still cannot solve NiFe 2 o 4 Pulverization on the surface of the carbon substrate cannot provide good charge-discharge cycle performance of the electrode

Method used

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  • NiFe2O4 nano composite material and preparation method and application thereof
  • NiFe2O4 nano composite material and preparation method and application thereof
  • NiFe2O4 nano composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0158] G@p-SiO 2 Synthesis of composite materials: 160mg cetyltrimethylammonium bromide (CTAB) was dissolved in 30mlH 2 O, 120ml ethanol and 1.5ml NH 3 .H 2 O mixture. Then, 40 mg GO was dispersed in the above solution by ultrasonication, and then 1 mL tetraethylorthosilicate (TEOS) was slowly added and kept stirring for 12 h. with H 2 After O washing and drying at 80 °C, the product was further annealed at 800 °C for 3 h under Ar atmosphere to obtain G@p-SiO 2 Composite, wherein, the mass content of graphene is 6.3wt%.

[0159] 100mg G@p-SiO 2 (graphene composite coated with porous silica on the surface) was added to the 3 ) 3 9H 2 O and 0.25mmol Ni(NO 3 ) 2 ·6H 2 O in 10 mL of ethanol. After sonication for 10 min, the above solution was stirred at 45 °C to evaporate ethanol. The product was annealed in Ar at 350 °C for 3 h. Then the obtained G@SiO 2 @NiFe 2 o 4 Complex in 100ml H 2 Sonicate with 1 mL of polydiallyldimethylammonium chloride (PDDA, 20 wt%, ...

Embodiment 2

[0164] The difference between this embodiment and embodiment 1 is:

[0165] G@p-SiO 2 Synthesis of composite materials: 160mg cetyltrimethylammonium bromide (CTAB) was dissolved in 30mlH 2 O, 120ml ethanol and 1.5ml NH 3 .H 2 O mixture. Then, 18.4 mg GO was dispersed in the above solution by ultrasonication, and then 1 mL tetraethyl orthosilicate (TEOS) was slowly added and kept stirring for 12 h. with H 2 After O washing and drying at 80 °C, the product was further annealed at 800 °C for 3 h under Ar atmosphere to obtain G@p-SiO 2 Composite, wherein, the mass content of graphene is 3wt%.

[0166] 100mg G@p-SiO 2 (graphene composite coated with porous silica on the surface) was added to the 3 ) 3 9H 2 O and 0.15mmol Ni(NO 3 ) 2 ·6H 2 O in 10 mL of ethanol. After sonication for 10 min, the above solution was stirred at 45 °C to evaporate ethanol. The product was heated at 300°C under N 2 Medium annealing for 12 hours. Then the obtained G@SiO 2 @NiFe 2 o 4 Co...

Embodiment 3

[0169] The difference between this embodiment and embodiment 1 is:

[0170] G@p-SiO 2 Synthesis of composite materials: 160mg cetyltrimethylammonium bromide (CTAB) was dissolved in 30mlH 2 O, 120ml ethanol and 1.5ml NH 3 .H 2 O mixture. Then, 81.3 mg GO was dispersed in the above solution by ultrasonication, and then 1 mL tetraethylorthosilicate (TEOS) was slowly added and kept stirring for 12 h. with H 2 After O washing and drying at 80 °C, the product was further annealed at 800 °C for 12 h under Ar atmosphere to obtain G@p-SiO 2 Composite, wherein, the mass content of graphene is 12wt%.

[0171] 100mg G@p-SiO 2 (graphene composite coated with porous silica on the surface) was added to the 3 ) 3 9H 2 O and 0.2mmol Ni(NO 3 ) 2 ·6H 2 O in 10 mL of ethanol. After sonication for 10 min, the above solution was stirred at room temperature to evaporate ethanol. The product was heated at 500°C under N 2 Anneal for 1 hour. Then the obtained G@SiO 2 @NiFe 2 o 4 Com...

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Abstract

The invention discloses a NiFe2O4 nano composite material, which comprises at least two graphene layers and at least one NiFe2O4 layer arranged between the graphene layers. The invention further discloses a preparation method and an application of the composite material. The nano composite material has excellent electrical properties.

Description

technical field [0001] The invention belongs to the field of nanomaterial preparation, in particular to a NiFe 2 o 4 Nanocomposites and their preparation methods and applications. Background technique [0002] Lithium-ion batteries (LIBs) have achieved great success in portable electronics and electric vehicles over the past few years. Recently, sodium-ion batteries (SIBs) have attracted increasing attention as an alternative technology to LIBs for their applications in large-scale energy storage due to their abundant cost-effective sodium resources. To meet the growing demand from energy storage applications, it is crucial to explore new electrode materials with good safety, long-term cycling, and high energy / power density for LIBs and SIBs. In the field of anode materials, commercial graphite is used for LIB with 372mAh g -1 low theoretical capacity. Furthermore, when inserted into pristine graphite, Na + The large ionic radius leads to poor reversible performance. ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/52H01M4/583H01M10/0525H01M10/054B82Y30/00
CPCB82Y30/00H01M4/366H01M4/523H01M4/583H01M10/0525H01M10/054H01M2004/027Y02E60/10
Inventor 赵毅吴初新官轮辉
Owner FUJIAN INST OF RES ON THE STRUCTURE OF MATTER CHINESE ACAD OF SCI
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