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Preparation and application of tin-doped, induced and synthesized mixed-phase molybdenum disulfide-chlorella derived carbon composite material

A molybdenum disulfide, composite material technology, applied in nanotechnology, electrochemical generators, secondary batteries, etc. for materials and surface science, to achieve the effects of wide sources, increased electrical conductivity, and improved electronic conductivity

Active Publication Date: 2019-05-10
FUJIAN NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There is no record about the preparation of 1T-2H miscible few-layer molybdenum disulfide-carbon composites with tin doping by one-step calcination for sodium-ion batteries

Method used

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  • Preparation and application of tin-doped, induced and synthesized mixed-phase molybdenum disulfide-chlorella derived carbon composite material
  • Preparation and application of tin-doped, induced and synthesized mixed-phase molybdenum disulfide-chlorella derived carbon composite material
  • Preparation and application of tin-doped, induced and synthesized mixed-phase molybdenum disulfide-chlorella derived carbon composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] 1) Weigh 2g of chlorella, 5g of phosphomolybdic acid and 1.5g of stannous sulfate into 0.4L of distilled water, stir for 12 hours, centrifuge once and dry in an oven at 60°C;

[0036] 2) after step 1) the dark green massive solid gained and the sulfur powder of 2 times of its quality are mixed, in Ar 95%\H 2 Calcined in a 5% atmosphere tube furnace at 600°C for 2 hours, and collected a black solid sample, which is a 1T-2H mixed-phase few-layer molybdenum disulfide-chlorella-derived carbon composite material;

[0037] The 1T-2H miscible few-layer molybdenum disulfide-chlorella-derived carbon composite material prepared above was determined by XRD, and obtained figure 1 The XRD pattern of the 1T-2H miscible few-layer molybdenum disulfide-chlorella-derived carbon composite, as figure 1 shown. Depend on figure 1 It can be seen that the synthesized material is molybdenum disulfide, and its diffraction peak position matches the standard spectrum of molybdenum disulfide (J...

Embodiment 2

[0040] 1) Weigh 2g of chlorella, 7.5g of ammonium molybdate and 2.5g of stannous chloride into 0.4L of distilled water, stir for 12 hours, centrifuge once and dry in an oven at 80°C;

[0041] 2) after step 1) the dark green massive solid gained and the sulfur powder of 2 times of its quality are mixed, in Ar 95%\H 2 Calcined at 650°C for 2 hours in a 5% atmosphere tube furnace, and collected a black solid sample, which is a 1T-2H mixed-phase few-layer molybdenum disulfide-chlorella-derived carbon composite material;

[0042] 3) The 1T-2H mixed-phase few-layer molybdenum disulfide-chlorella-derived carbon composite material prepared in this example: conductive agent super P carbon: binder CMC is mixed and ground according to the mass percentage of 8:1:1 and evenly coated Make the working electrode on the copper foil, the metal sodium sheet is the counter electrode and the reference electrode, 1mol / L NaClO 4 / PC+EC is assembled into a button cell for the electrolyte; all assem...

Embodiment 3

[0044] 1) Weigh 2g of chlorella, 5g of phosphomolybdic acid and 1g of stannous sulfate into 0.6L of distilled water, stir for 12 hours, centrifuge once and dry in an oven at 60°C;

[0045] 2) after step 1) the dark green massive solid gained and the sulfur powder of 2 times of its quality are mixed, in Ar 95%\H 2 Calcined in a 5% atmosphere tube furnace at 500°C for 2 hours, and collected a black solid sample, which is a 1T-2H mixed-phase few-layer molybdenum disulfide-chlorella-derived carbon composite material;

[0046] The 1T-2H mixed-phase few-layer molybdenum disulfide-chlorella-derived carbon composite material prepared in this example: conductive agent super P carbon: binder CMC is mixed and ground according to the mass percentage of 80:10:10 and evenly coated on the copper Foil as working electrode, metal sodium sheet as counter electrode and reference electrode, 1mol / L NaClO 4 / PC+EC is assembled into a button cell for the electrolyte; all assemblies are carried out...

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Abstract

The invention relates to preparation and application of a tin-doped, induced and synthesized mixed-phase molybdenum disulfide-chlorella derived carbon composite material with a large-capacity sodium storage characteristic. The preparation comprises the steps of: firstly adding chlorella, a molybdenum source and a tin source in deionized water according to a mass ratio of 1: 2-5: 0.2-2, and carrying out centrifugal drying after stirring for a certain time so as to obtain a deep green block-shaped solid; and carrying out calcination and sulfurization to obtain a 1T-2H mixed-phase molybdenum disulfide-chlorella derived carbon composite material. The preparation is simple in process, strong in operability, wide in raw material source, low in cost and suitable for large-scale production, and accords with environment requirements. Results show that the sodium ion battery cathode material has the large-capacity sodium storage characteristic. The molybdenum disulfide in the material is a less-layer structure (1-4 layers), has an extra small nanoparticle size (5-10 nm) and has 1t and 2H phases.

Description

technical field [0001] The invention belongs to the technical field of sodium ion battery material preparation, and in particular relates to the preparation and application of a tin doping-induced synthesis mixed-phase (1T-2H) molybdenum disulfide-chlorella-derived carbon composite material with large-capacity sodium storage characteristics. Background technique [0002] Due to the limited and high price of lithium resources, the massive consumption of lithium has made lithium resources increasingly scarce. The reserves of sodium metal on the earth are far more than lithium resources and the price is low. Therefore, sodium-ion batteries can be used as an excellent substitute and are expected to replace lithium. Ion batteries are used in our life. The traditional commercial lithium-ion battery anode material graphite has low specific capacity and poor stability in sodium-ion batteries, while molybdenum disulfide has a special layered structure and has a high specific capacity...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00
CPCY02E60/10
Inventor 曾令兴罗奋强程涵陈婷陈晓燕钱庆荣陈庆华黄宝铨肖荔人
Owner FUJIAN NORMAL UNIV
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