Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method

A V2O5, cathode material technology, applied in battery electrodes, structural parts, electrical components, etc., can solve problems such as large toxic gases, improve kinetic characteristics, achieve large-scale production, and facilitate operation.

Inactive Publication Date: 2011-10-05
BEIJING UNIV OF CHEM TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method produces a large amount

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  • Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method
  • Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method
  • Ultra-long single crystal V2O5 nano wire/graphene anode material and preparation method

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Example Embodiment

[0032] Example 1

[0033] First, 0.364g V2O5 powder (99.8%) was dissolved in 20mL deionized water, and then 4.0mL 30% H was added to the above solution under mechanical stirring. 2 O 2 Stir continuously at room temperature for 2 hours; meanwhile, dissolve 0.0182g (5wt% ofV2O5) commercial graphite (KS-6) in 10mL deionized water, and then add 3.0mL30%H to the above solution under mechanical stirring. 2 O 2 And ultrasonic degradation at 100W for 6h; then, the above two solutions were mixed into a 50mL autoclave, kept at 205℃ for 5 days; finally, the product was washed with deionized water, centrifuged for 30 minutes, and dried in a vacuum oven at 80℃ for 12 It was annealed at 400°C for 30 minutes in an air atmosphere to obtain an ultra-long single crystal V2O5 nanowire / graphene composite cathode material. SEM and TEM analysis ( figure 2 , image 3 , Figure 4 , Figure 5 , Image 6 ) Shows that the length of V 2 O 5 The nanowires are distributed orderly on the surface and between the...

Example Embodiment

[0034] Example 2

[0035] First, 0.182g of V2O5 powder (99.8%) was dissolved in 10mL of deionized water, and then 5.0mL of isopropanol was added to the above solution under mechanical stirring and stirring was continued for 4 hours at room temperature; meanwhile, 0.0091g ​​(5wt% ofV2O5) Commercial graphite (super-p) was dissolved in 5 mL of deionized water, and 1.5 mL of isopropanol was added to the above solution under mechanical stirring and ultrasonically degraded at 100 W for 4 hours; then, the above two solutions were mixed and placed in a 50 mL autoclave. Keep at 210℃ for 4 days; finally, the product is washed with deionized water, centrifuged for 30 minutes, dried in a vacuum oven at 80℃ for 12 hours, and annealed at 400℃ for 30 minutes in an air atmosphere to obtain VO 2 Nanorod / graphene composite cathode material. X-ray diffraction analysis shows that the final product contains GNS and VO respectively 2 Diffraction peak, and VO 2 The GNS in the nanorod / graphene composite...

Example Embodiment

[0036] Example 3

[0037] 0.364g V 6 O 13 The powder was dissolved in 20mL deionized water, and 4.0mL 30% H was added to the above solution under mechanical stirring. 2 O 2 Stir continuously at room temperature for 2 hours; meanwhile, dissolve 0.0364g (10wt% ofV6O13) commercial expandable graphite in 10mL deionized water, and then add 3.0mL 30%H to the above solution under mechanical stirring 2 O 2 Then, the above two solutions were mixed into a 50mL autoclave and roasted at 215°C for 8 days; finally, the product was washed with deionized water, centrifuged for 30 minutes, and dried in a vacuum oven at 80°C for 12 It is annealed at 400°C for 30 minutes in an air atmosphere to obtain a nanostructured vanadium oxide / graphene composite cathode material. X-ray diffraction analysis shows that the final product contains GNS and vanadium oxide diffraction peaks, and the electrochemical test results show that the nano-structured vanadium oxide / graphene composite cathode material has high ...

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Abstract

The invention discloses an ultra-long single crystal V2O5 nano wire/graphene anode material and a preparation method, and belongs to the field of lithium ion battery electrode materials and preparation thereof. The V2O5 nano wire/graphene anode material consists of a two-dimensional graphene nano sheet and one-dimensional V2O5 nano wires, wherein the ultra-long single crystal V2O5 nano wires are regularly distributed on the surface and the interlayer of the transparent graphene nano sheet to form a sandwich structure. The preparation method comprises the following steps of: dispersing vanadium oxide powder and merchant graphite into deionized water, adding an oxidant, fully stirring mixture uniformly, performing ultrasonic treatment, putting the mixture into an autoclave, keeping the mixture for certain time at a certain temperature, and performing vacuum drying to obtain the ultra-long single crystal V2O5 nano wire/graphene composite anode material. The invention has the advantages that: the first discharge capacity, the magnification performance and the electrochemical cyclical stability of the composite anode material are remarkably improved. The method is simple, environment-friendly, convenient for operation and easy to realize large-scale production.

Description

technical field [0001] The invention belongs to the technical field of lithium-ion battery electrode materials and their preparation, and in particular provides an ultra-long single crystal V 2 o 5 The preparation method of nanowire / graphene composite cathode material, and this ultralong single crystal V 2 o 5 The nanowire / graphene composite cathode material exhibits good electrochemical performance. Background technique [0002] Lithium-ion battery is a new type of battery developed after the 1970s, which was first commercialized by Sony in 1990. Due to the advantages of high operating voltage, high energy density, long cycle life, no memory effect and environmental friendliness, lithium-ion batteries have shown irreplaceable advantages in practical applications and are widely used in mobile phones, notebook computers, electric vehicles, etc. , weapons and equipment, etc. [0003] In recent years, the output of lithium-ion batteries has grown rapidly, and its applicati...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/139
CPCY02E60/12Y02E60/122Y02E60/10
Inventor 刘海梅梁丽颖杨文胜
Owner BEIJING UNIV OF CHEM TECH
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