A bulb-shaped o-mx n /c nano reactor and its preparation method and application

A nano-reactor and reactor technology, applied in the direction of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problem of uneven compounding of carbon and active materials, difficulty in controlling the microstructure of materials, and complicated preparation processes and other problems, to achieve the effects of alleviating structural changes and volume collapse, excellent high-rate performance and cycle stability, and improving intrinsic conductivity

Active Publication Date: 2021-07-16
ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the above methods have improved the electrochemical lithium storage performance of the material, they are still not effective under high-rate (≥5 A / g) long-term cycle conditions, and there are complex preparation processes, difficult control of the material microstructure, carbon and active materials. Scientific issues such as composite inhomogeneity

Method used

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  • A bulb-shaped o-mx <sub>n</sub> /c nano reactor and its preparation method and application
  • A bulb-shaped o-mx <sub>n</sub> /c nano reactor and its preparation method and application
  • A bulb-shaped o-mx <sub>n</sub> /c nano reactor and its preparation method and application

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Experimental program
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Embodiment 1

[0039] A bulb-shaped O-MX of this embodiment n The preparation method of / C nanometer reactor, step is as follows:

[0040] Dissolve 0.1 mmol sodium molybdate in 1 mL of aqueous solution to form S1 solution; dissolve 0.5 mmol dodecyltrimethylammonium bromide in 200 mL of glycerol to form S2 solution; add S1 solution dropwise to S2 solution A water-in-oil microemulsion was formed in the microemulsion; 0.1 mmol of the corresponding cysteine ​​was added to the microemulsion; finally, MoS was prepared by hydrothermal reaction at 220 °C for 2 h 2 Precursor, its FESEM photo is as figure 1 As shown, the morphology of the precursor is a hollow bulb-like opening.

[0041] The precursor is placed in a tube furnace for heat treatment, the heating rate is 20 ℃ / min, the calcination time is 6 h, the calcination temperature is 700 ℃, the calcination atmosphere is argon, and the product is a bulb-shaped O-MoS 1.5 / C nanoreactor, its FESEM photo is as figure 2 Shown: O-MoS obtained after ...

Embodiment 2

[0043] A bulb-shaped O-MX of this embodiment n The preparation method of / C nanometer reactor, step is as follows:

[0044] Dissolve 5mmol sodium molybdate in 50 mL of aqueous solution to form S1 solution; dissolve 20mmol dodecyltrimethylammonium chloride in 200mL of glycerol to form S2 solution; add S1 solution dropwise to S2 solution to form Water-in-oil microemulsion; add 10 mmol of the corresponding cysteine ​​to the microemulsion; finally, hydrothermal reaction at 160 °C for 48 h to prepare MoS 2 Precursor.

[0045] The precursor is placed in a tube furnace for heat treatment, the heating rate is 20 ℃ / min, the calcination time is 6 h, the calcination temperature is 700 ℃, the calcination atmosphere is argon, and the product is a bulb-shaped O-MoS 1.5 / C nanoreactor.

Embodiment 3

[0047] A bulb-shaped O-MX of this embodiment n The preparation method of / C nanometer reactor, step is as follows:

[0048] Dissolve 3 mmol ammonium molybdate in 30 mL of aqueous solution to form S1 solution; dissolve 10 mmol cetylpyridinium bromide in 100 mL of glycerol to form S2 solution; add S1 solution dropwise to S2 solution to form Water-in-oil microemulsion; add 5 mmol of the corresponding thiourea to the microemulsion; finally, hydrothermal reaction at 200 ℃ for 24 h to prepare MoS 2 Precursor.

[0049] The precursor is placed in a tube furnace for heat treatment, the heating rate is 20 ℃ / min, the calcination time is 6 h, the calcination temperature is 700 ℃, the calcination atmosphere is argon, and the product is a bulb-shaped O-MoS 1.5 / C nanoreactor.

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Abstract

The invention belongs to the technical field of controllable preparation of transition metal chalcogenide materials, and relates to a bulb-shaped O-MX n / C nanoreactor and its preparation method and application. By strictly controlling the formation of microemulsion, ion exchange kinetics and heat treatment process, the application can controlly prepare monodisperse bulb-like O‑MX with adjustable X vacancy gradient and short-range uniform compounding of carbon and active materials n / C nanoreactor, the prepared material has high-rate lithium storage performance and excellent cycle durability, showing great potential in the field of lithium battery applications.

Description

technical field [0001] The invention belongs to the technical field of controllable preparation of transition metal chalcogenide materials, and relates to a bulb-shaped O-MX n / C nanoreactor and its preparation method and application. Background technique [0002] China has the advantage of abundant high-grade molybdenum / tungsten ore resources. Luoyang Luanchuan Molybdenum Industry Group Co., Ltd. is the world's top five molybdenum producers and the largest tungsten producer. The Sandaozhuang molybdenum / tungsten mine wholly owned and operated by CMOC is the molybdenum mine with the largest proven molybdenum reserves in the world and the tungsten mine with the second largest proven tungsten reserves in the world. Molybdenum / tungsten and related materials are key materials for the development of high-tech devices / products, and related resources are also extremely valuable strategic assets of our country. However, in many chemical materials (including molybdenum / tungsten and...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/5815H01M4/62H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 巩飞龙王翊骁弓丽华孟二超张永辉李峰
Owner ZHENGZHOU UNIVERSITY OF LIGHT INDUSTRY
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