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Preparation method and application of phosphorus-doped MoS2-loaded graphene nanosheet

A technology of graphene nanosheets and phosphorus doping, which is applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of volume expansion, electrode material crushing, and poor electrochemical performance, so as to improve energy storage performance, Improvement of electronic conductivity and the effect of enhancing electrical conductivity

Active Publication Date: 2019-02-12
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As we all know, MoS 2 The main reason for the poor electrochemical performance of MoS is that Na ions lead to MoS 2 Volume expansion, which in turn causes the electrode material to shatter

Method used

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  • Preparation method and application of phosphorus-doped MoS2-loaded graphene nanosheet
  • Preparation method and application of phosphorus-doped MoS2-loaded graphene nanosheet
  • Preparation method and application of phosphorus-doped MoS2-loaded graphene nanosheet

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] Phosphorus-doped MoS in this example 2 The preparation method of loaded graphene nanoplate, comprises the following steps:

[0032] 1. Preparation of graphene oxide: Add 70 mL of concentrated sulfuric acid with a mass concentration of 98% to a 500 mL three-necked flask and put it in an ice-water bath; weigh 2 g of flake graphite and add it to a three-necked flask containing concentrated sulfuric acid, and mechanically stir 20 min; Weigh 8 g of potassium permanganate and slowly add it to the above mixed solution. After stirring for 2 h under ice bath, transfer to a constant temperature water bath at 35°C and stir at a constant speed for 12 h (overnight) until the solution becomes viscous. yellowish brown; remove the three-neck flask from the water bath, slowly add 297 mL of deionized water dropwise and keep stirring until it cools down to room temperature; measure 25 mL of 30% H 2 o 2 Added to the above solution, washed three times with dilute hydrochloric acid and dei...

Embodiment 2

[0036] Phosphorus-doped MoS in this example 2 The preparation method of loaded graphene nanoplate, comprises the following steps:

[0037]1. Preparation of graphene oxide: Add 70 mL of concentrated sulfuric acid with a mass concentration of 98% to a 500 mL three-necked flask and put it in an ice-water bath; weigh 2 g of flake graphite and add it to a three-necked flask containing concentrated sulfuric acid, and mechanically stir 25 min; Weigh 8 g of potassium permanganate and slowly add it to the above mixed solution. After stirring for 2 h under ice bath, transfer to a constant temperature water bath at 35°C and stir at a constant speed for 12 h (overnight) until the solution becomes viscous. yellowish brown; remove the three-neck flask from the water bath, slowly add 297 mL of deionized water dropwise and keep stirring until it cools down to room temperature; measure 25 mL of 30% H 2 o 2 Added to the above solution, washed three times with dilute hydrochloric acid and deio...

Embodiment 3

[0041] Phosphorus-doped MoS in this example 2 The preparation method of loaded graphene nanoplate, comprises the following steps:

[0042] 1. Preparation of graphene oxide: Add 70 mL of concentrated sulfuric acid with a mass concentration of 98% to a 500 mL three-necked flask and put it in an ice-water bath; weigh 2 g of flake graphite and add it to a three-necked flask containing concentrated sulfuric acid, and mechanically stir 30 min; Weigh 8 g of potassium permanganate and slowly add it to the above mixed solution. After stirring for 2 h under ice bath, transfer to a 35°C constant temperature water bath and stir at a constant speed for 12 h (overnight) until the solution becomes viscous. yellowish brown; remove the three-neck flask from the water bath, slowly add 297 mL of deionized water dropwise and keep stirring until it cools down to room temperature; measure 25 mL of 30% H 2 o 2 Added to the above solution, washed three times with dilute hydrochloric acid and deioni...

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Abstract

The invention provides a preparation method of a proportion-controllable phosphorus-doped MoS2-loaded graphene nanosheet, comprising the steps of preparing graphene oxide; preparing MoS2-loaded graphene by using a hydrothermal method to load Mo source on the graphene oxide; and adopting a gas phase deposition method for doping phosphorus onto the MoS2-loaded graphene to obtain the phosphorus-dopedMoS2-loaded graphene nanosheets. The nanosheet has excellent energy storage performance when used for the electrode material of a sodium ion battery.

Description

technical field [0001] The invention relates to the technical field of composite material preparation, specifically a phosphorus-doped MoS with a controllable ratio 2 Preparation method of loaded graphene nanosheets and application in energy storage. Background technique [0002] With the advent of the electronic information age, people's demand for electronic products is increasing. Lithium-ion batteries, as energy storage components, are widely used in portable electronic products. Due to the scarcity and high cost of lithium-ion natural resources, the large-scale application of lithium-ion energy storage devices is greatly limited, so it is very important to find an alternative lithium source metal. Na-ion batteries have attracted great attention due to their abundant and low-cost resources, as well as the similar chemical properties of Li and Na elements. [0003] In recent years, layered transition metal compounds, especially MoS 2 , is considered as a good electrode...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M10/054
CPCH01M4/362H01M4/5815H01M4/583H01M10/054Y02E60/10
Inventor 李丹张岩苏行张建民李勇盛
Owner ZHENGZHOU UNIV
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