MoS2/nitrogen-doped carbon tube composite material and preparation method and application thereof

A composite material, nitrogen-doped carbon technology, used in nanotechnology for materials and surface science, electrical components, electrochemical generators, etc., can solve problems such as poor cycle performance and rate performance, and increase active sites. , The synthesis process is simple and controllable, and the repeatability is good.

Active Publication Date: 2018-03-13
QINGDAO UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Molybdenum disulfide has the advantage of high theoretical capacity, but MoS 2 The cycle performance and rate performance of MoS are poor, therefore, improving its stability is the key to developing MoS 2 Composites focus

Method used

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  • MoS2/nitrogen-doped carbon tube composite material and preparation method and application thereof
  • MoS2/nitrogen-doped carbon tube composite material and preparation method and application thereof
  • MoS2/nitrogen-doped carbon tube composite material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] (1) Soak a common commercial melamine sponge (hereafter replaced by MS) in 0.1mol / L dilute hydrochloric acid for 12 hours to remove impurities, and then soak and wash it in deionized water until it is neutral. Dry it overnight at 80°C in a blast drying oven.

[0040] (2) Put the processed MS into an empty burning furnace (KSL-1100X, Hefei Kejing) and burn it at 400°C for 2 hours to obtain the template material NCT.

[0041] (3) Weigh 76.7mg ammonium molybdate tetrahydrate (AR analytical grade, Sinopharm) and 1g thiourea (AR,> 99%, Sinopharm), dissolve it in 20 mL of deionized water and sonicate it for 15 minutes to make it uniformly dispersed.

[0042] (4) Take the NCT obtained in step (2), drop the prepared solution into the sponge drop by drop until the sponge is saturated, and then transfer the sponge filled with the solution to a 50mL PTFE lining for hydrothermal reaction (180°C, 24h). After the reaction product was washed with deionized water several times, it was place...

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Abstract

The invention relates to the technical field of a sodium ion battery, in particular to a MoS2 / nitrogen-doped carbon tube composite material and preparation method and application thereof. Low-cost melamine sponge is used as a template material, a layer of MoS2 is grown on a surface of sponge fiber, high-temperature calcination is performed under argon protection, the sponge fiber contracts and iscollapsed from inside to outside, a unique three-dimensional hollow structure is grown, a layer of MoS2 nanosheet is uniformly grown at an outer layer, a nitrogen-doped carbon tube structure is arranged at an inner layer, electrolyte moving is facilitated, rapid electron transfer is also facilitated; and a nitrogen-doped carbon tube is arranged at an inner wall, many active sites are increased bya large amount of nitrogen, and the material obtains very excellent cycle property and rate performance when used as a sodium ion battery negative electrode material.

Description

Technical field [0001] The present invention relates to the technical field of sodium ion batteries, in particular to a MoS 2 / Nitrogen-doped carbon tube composite material and its preparation method and application. Background technique [0002] With the continuous development of society, the demand for energy by mankind is increasing rapidly. The resulting environmental problems such as haze, greenhouse effect and ecological imbalance have brought great negative effects on the sustainable development of society. Therefore, changing the unreasonable energy structure, establishing an efficient and clean energy system, developing a renewable new energy system, and large-scale energy storage are important issues that people need to solve urgently. Among them, the advantages of high energy density and long cycle life of lithium-ion batteries have been the first to develop, but due to the scarcity of lithium resources, the large-scale application of lithium-ion batteries is bound to ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/5815H01M4/583H01M4/625H01M10/054Y02E60/10
Inventor 冯红彬冯梦张慧珍赵修松
Owner QINGDAO UNIV
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