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Method and application for in-situ synthesis of MoS2@MoN hollow sphere

A technique for in situ synthesis of hollow spheres used in nanotechnology for materials and surface science, electrical components, electrochemical generators, etc.

Inactive Publication Date: 2019-06-07
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0002] So far, lithium-ion batteries have been widely used, but the traditional graphite anode material has only 372 mA h g due to its theoretical capacity. -1 , can no longer meet the needs of modern electronic equipment, so inventing alternative anode materials with high capacity has become the primary task of scientific researchers and the urgent need of modern society

Method used

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  • Method and application for in-situ synthesis of MoS2@MoN hollow sphere
  • Method and application for in-situ synthesis of MoS2@MoN hollow sphere
  • Method and application for in-situ synthesis of MoS2@MoN hollow sphere

Examples

Experimental program
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Effect test

Embodiment 1

[0016] 1) Add 0.1g molybdenum acetylacetonate to 30mL water, then add 0.2g thiourea, stir for 1 hour, transfer to a 50mL reaction kettle, react in an oven at 200°C for 24 hours, then cool to room temperature, centrifuge, wash with deionized water and Wash with ethanol several times, and then dry in a vacuum oven at 70°C to obtain the precursor;

[0017] 2) Put the obtained precursor into a tube furnace and calcinate at 800°C for 0.5h in an ammonia atmosphere to obtain MoS 2 @MoN hollow ball.

[0018] figure 1 MoS obtained in Example 1 2 The XRD pattern of @MoN hollow spheres, which shows that MoS was successfully synthesized 2 @MoN.

[0019] figure 2 MoS obtained in Example 1 2 SEM and TEM images of @MoN hollow spheres. It can be seen from the SEM image that it is composed of nanosheets, and it can be seen from the broken ball that it is a hollow structure. From the TEM images, it can be seen that the outer and inner lattice spacings are 0.252 nm and 0.67 nm, correspo...

Embodiment 2

[0021] MoS obtained in Example 1 2 @MoN hollow spheres, acetylene black, and PVDF are mixed and ground at a mass ratio of 7:2:1, and then evenly coated on a copper grid as a negative electrode, and then metal lithium is used as a reference electrode and a counter electrode, 1M LiPF 6 The EC / DMC / DEC (1:1:1, v / v / v) solution was used as the electrolyte, and a lithium-ion battery was assembled in a glove box.

[0022] image 3 It is the cycle performance diagram of the lithium-ion battery obtained in Example 2. Depend on image 3 (a) It can be seen that when the current density is 0.2A·g -1 Under the condition of 100 cycles, its specific capacity is maintained at 910 mA·h·g-1. image 3 (b) demonstrates the long-term cycling stability of the material at 2 A g -1 After 1000 cycles at a certain current density, its capacity can be maintained at 709 mA·h·g -1 .

[0023] Figure 4 For the lithium ion battery obtained in embodiment 2 and by MoS 2 Rate performance diagram of lit...

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Abstract

The present invention discloses a method and application for in-situ synthesis of a MoS2@MoN hollow sphere. The method comprises the steps of: taking molybdenyl acetylacetonate and thiourea as raw materials to prepare a precursor through the hydrothermal reaction, performing calcinations of the precursor under an ammonia atmosphere to obtain a MoS2@MoN hollow sphere. The method is simple in process and low in cost, the prepared MoS2@MoN hollow sphere can be taken as an anode material for preparation of the lithium ion battery, and the prepared battery is good in cycle performance and good in development prospect.

Description

technical field [0001] The invention belongs to the technical field of battery material preparation, and in particular relates to an in-situ synthesis of MoS 2 @MoN hollow sphere approach and its application in Li-ion batteries. Background technique [0002] So far, lithium-ion batteries have been widely used, but the traditional graphite anode material has only 372 mA h g due to its theoretical capacity. -1 , can no longer meet the needs of modern electronic equipment, so inventing alternative anode materials with high capacity has become the primary task of scientific researchers and an urgent need of modern society. Contents of the invention [0003] The object of the present invention is to provide a kind of in situ synthesis MoS 2 @MoN hollow sphere approach and its application in Li-ion batteries, [0004] To achieve the above object, the present invention adopts the following technical solutions: [0005] An in situ synthesized MoS 2 The method of @MoN hollow b...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/0525B82Y30/00
CPCY02E60/10
Inventor 魏明灯王建标
Owner FUZHOU UNIV