Nitrogen doped carbon nanofiber/molybdenum disulfide composite and preparation method and application thereof

A nanofiber and molybdenum disulfide technology, applied in the field of energy storage materials, can solve the problems of easy structure collapse, poor conductivity of molybdenum sulfide, reduced cycle performance and rate performance, and achieve the effects of inhibiting agglomeration, easy operation, and high specific capacity

Active Publication Date: 2018-03-06
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, molybdenum sulfide has poor electrical conductivity, and its structure is easy to collapse during the process of lithium intercalation and delithiation, which greatly reduces its cycle performance and rate performance.

Method used

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  • Nitrogen doped carbon nanofiber/molybdenum disulfide composite and preparation method and application thereof
  • Nitrogen doped carbon nanofiber/molybdenum disulfide composite and preparation method and application thereof
  • Nitrogen doped carbon nanofiber/molybdenum disulfide composite and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0028] (1) Dissolve 0.8g polymethyl methacrylate in 10ml DMF, stir for 12h to obtain polymethyl methacrylate spinning stock solution, add it to the syringe, and inject it at a speed of 0.1mm / min and a voltage of 15kV 1. Under the condition that the distance between the needle of the syringe and the receiving plate is 15 cm, electrospinning is carried out to obtain a polymethyl methacrylate nanofiber film.

[0029] (2) 1.01g pyrrole is mixed with 1mol / L hydrochloric acid aqueous solution to obtain 500ml pyrrole solution, 3.24g ferric chloride trihydrate is mixed with 1mol / L hydrochloric acid aqueous solution to obtain 500ml ferric chloride solution, step (1) 0.5g of the polymethyl methacrylate nanofiber membrane in 500ml pyrrole solution was soaked for 30min, and under ice-water bath conditions, 500ml of ferric chloride solution was added dropwise to the pyrrole solution, and the mixed solution was heated at zero Under the condition of reaction for 12 hours, the polypyrrole / pol...

Embodiment 2

[0036] (1) Dissolve 0.8g polymethyl methacrylate in 10ml DMF, stir for 12h to obtain polymethyl methacrylate spinning stock solution, add it to the syringe, and inject it at a speed of 0.1mm / min and a voltage of 15kV 1. Under the condition that the distance between the needle of the syringe and the receiving plate is 15 cm, electrospinning is carried out to obtain a polymethyl methacrylate nanofiber membrane.

[0037] (2) 1.01g pyrrole is mixed with 1mol / L hydrochloric acid aqueous solution to obtain 500ml pyrrole solution, 3.24g ferric chloride trihydrate is mixed with 1mol / L hydrochloric acid aqueous solution to obtain 500ml ferric chloride solution, step (1) 0.3g of the polymethyl methacrylate nanofiber membrane in 500ml pyrrole solution was soaked for 30min, and under ice-water bath conditions, 500ml of ferric chloride solution was added dropwise to the pyrrole solution, and the mixed solution was heated at zero Under the condition of reaction for 12 hours, the polypyrrole...

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Abstract

The invention relates to a nitrogen doped carbon nanofiber/molybdenum disulfide composite. The nitrogen doped carbon nanofiber/molybdenum disulfide composite takes a polymethyl methacrylate nanofiberas a template, polypyrrole is polymerized on the surface of the nanofiber in situ, the molybdenum disulfide is then grown in situ, the composite has a hollow tubular structure, a molybdenum disulfidesheet is evenly distributed on the surface of the nitrogen doped carbon nanofiber, the size of the nitrogen doped carbon nanofiber is uniform, a preparation method comprises synthesis of a polymethylmethacrylate spinning solution, synthesis of a polymethyl methacrylate nanofiber membrane, synthesis of the polypyrrole/polymethyl methacrylate nanofiber membrane, synthesis of the nitrogen doped carbon nanofiber/molybdenum disulfide nanofiber membrane, and synthesis of the nitrogen doped carbon nanofiber/molybdenum disulfide composite. The method is simple, is easy to operate and is environmentally friendly; the prepared nitrogen doped carbon nanofiber/molybdenum disulfide composite has the advantages of high specific surface area, high cycle stability, high electric conductivity, high rate capability and high specific capacity, and is used as a negative electrode material for a lithium ion battery.

Description

technical field [0001] The invention belongs to the field of energy storage materials, in particular to a nitrogen-doped carbon nanofiber / molybdenum disulfide composite material and its preparation method and application. Background technique [0002] With the process of economic globalization and the increasing demand for energy, the design and development of new energy storage devices has become a hot spot in the energy field. Lithium-ion battery is currently the battery system with the best comprehensive performance. It has the characteristics of high specific energy, high cycle life, small size, light weight, no memory effect, and no pollution. It has rapidly developed into a new generation of energy storage power supply and is widely used in Information technology, electric vehicles, hybrid vehicles, aerospace and other fields. Lithium-ion batteries are composed of four parts: positive electrode, negative electrode, electrolyte and separator. As the key component of l...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525
CPCH01M4/362H01M4/5815H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 刘天西伏璀玫缪月娥周宇李斐
Owner DONGHUA UNIV
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