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Preparation method and application of MoS2 quasi-quantum dot/nitrogen-sulfur co-doped biomass carbon composite nanomaterial

A composite nanomaterial, nitrogen-sulfur co-doping technology, applied in nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve problems such as poor stability and poor electrochemical performance

Inactive Publication Date: 2021-05-11
NINGBO INST OF NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is: provide a kind of MoS 2 Preparation method of quasi-quantum dot / nitrogen-sulfur co-doped biomass carbon composite nanomaterial ( / indicates composite material, the same below) to solve the current conventional MoS 2 Poor electrochemical performance and poor stability as an electrode material for sodium ion batteries; provide a preparation method with simple operation, controllable reaction temperature, short reaction cycle, low equipment requirements, and suitable for large-scale production

Method used

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  • Preparation method and application of MoS2 quasi-quantum dot/nitrogen-sulfur co-doped biomass carbon composite nanomaterial
  • Preparation method and application of MoS2 quasi-quantum dot/nitrogen-sulfur co-doped biomass carbon composite nanomaterial
  • Preparation method and application of MoS2 quasi-quantum dot/nitrogen-sulfur co-doped biomass carbon composite nanomaterial

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Experimental program
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Effect test

Embodiment 1

[0030] A kind of MoS 2 The preparation method of quasi-quantum dot / nitrogen-sulfur co-doped biomass carbon composite nanomaterial comprises the following steps:

[0031] Step 1: Preparation of nitrogen-doped carbon nanomaterials

[0032] 1) 20 g of cleaned lobster shells were placed in a tube furnace, and heated at 5°C min under the condition of argon gas. -1 The heating rate is raised from room temperature to 550°C for carbonization, and after holding for 1 hour, it is cooled to room temperature with the furnace;

[0033] 2) Disperse the carbonized lobster shell in 100mL deionized water, and use a concentration of 0.2mol L under the condition of magnetic stirring -1 Treat with hydrochloric acid until no bubbles are generated, and adjust to pH=7.0. cleaning and filtering the filtered product and freeze-drying to obtain nitrogen-doped carbon nanomaterials;

[0034] Step 2: MoO 3 / Preparation of Nitrogen-doped Carbon Precursor

[0035] Doping carbon and MoO with nitrogen ...

Embodiment 2

[0042] A kind of MoS 2 The preparation method of quasi-quantum dot / nitrogen-sulfur co-doped biomass carbon composite nanomaterial comprises the following steps:

[0043] Step 1: Preparation of nitrogen-doped carbon nanomaterials

[0044] 1) 25 g of cleaned lobster shells were placed in a tube furnace, and heated at 6°C min under the condition of argon gas. -1 The heating rate is raised from room temperature to 600 ° C for carbonization, and after holding for 1.5 hours, it is cooled to room temperature with the furnace;

[0045] 2) Disperse the carbonized lobster shell in 120mL deionized water, and use a concentration of 0.4mol L under the condition of magnetic stirring -1 Treat with hydrochloric acid until no bubbles are generated, and adjust to pH=7.0. cleaning and filtering the filtered product and freeze-drying to obtain nitrogen-doped carbon nanomaterials;

[0046] Step 2: MoO 3 / Preparation of Nitrogen-doped Carbon Precursor

[0047] Doping carbon and MoO with nitr...

Embodiment 3

[0054] A kind of MoS 2 The preparation method of quasi-quantum dot / nitrogen-sulfur co-doped biomass carbon composite nanomaterial comprises the following steps:

[0055] Step 1: Preparation of nitrogen-doped carbon nanomaterials

[0056] 1) 30 g of cleaned lobster shells were placed in a tube furnace, and heated at 7°C min under the condition of argon gas. -1 The heating rate is raised from room temperature to 650°C for carbonization, and after holding for 2.0 hours, it is cooled to room temperature with the furnace;

[0057] 2) Disperse the carbonized lobster shell in 150mL deionized water, and use a concentration of 0.6mol L under the condition of magnetic stirring -1 Treat with hydrochloric acid until no bubbles are generated, and adjust to pH=7.0. cleaning and filtering the filtered product and freeze-drying to obtain nitrogen-doped carbon nanomaterials;

[0058] Step 2: MoO 3 / Preparation of Nitrogen-doped Carbon Precursor

[0059] Doping carbon and MoO with nitrog...

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Abstract

The invention discloses a MoS2 quasi-quantum dot / nitrogen-sulfur co-doped biomass carbon nanomaterial, and a preparation method and application thereof. The preparation method comprises the following steps: carbonizing lobster shells to obtain nitrogen-doped biomass carbon as a substrate material; and then synthesizing the MoS2 quasi-quantum dot / nitrogen and sulfur co-doped biomass carbon composite nanomaterial in situ through a solid phase method. Morphological analysis of the obtained product shows that the MoS2 quasi-quantum dots densely wrap the surface of the three-dimensional nitrogen and sulfur co-doped biomass carbon substrate material, so that the problems of structural collapse and electrode pulverization of a flaky MoS2 nanostructure in the sodium ion deintercalation process and agglomeration of the MoS2 quantum dots in the charging and discharging process are effectively relieved, and the preparation method is simple, controllable in reaction temperature, short in period, simple in process equipment and suitable for large-scale production. Meanwhile, the prepared carbon nanomaterial is used for the negative electrode of the sodium-ion battery, and still has the capacity of 340 mAh g<-1> after being circulated for 100 circles under the condition that the current density is 100 mA g<-1 >, and shows excellent electrochemical performance.

Description

technical field [0001] The invention belongs to the technical field of preparation of electrode materials for sodium ion batteries, and in particular relates to a kind of MoS 2 Preparation method and application of quasi-quantum dot / nitrogen-sulfur co-doped biomass carbon composite nanomaterial. Background technique [0002] Lithium-ion batteries are increasingly used as energy storage systems in portable electronic devices, electric vehicles, and drones. In addition, the rapid development of the new energy electric vehicle industry has greatly promoted the development of lithium-ion batteries in the direction of higher energy density and longer life. However, the scarcity and uneven distribution of lithium resources lead to soaring prices, which seriously restricts the large-scale development of lithium-ion batteries. [0003] Sodium belongs to the same main group as lithium and has similar chemical properties. Due to the abundance and low cost of sodium resources, sodiu...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/62H01M10/054B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/362H01M4/5815H01M4/625H01M4/628H01M10/054Y02E60/10
Inventor 杜祝祝艾伟黄维杜洪方王天
Owner NINGBO INST OF NORTHWESTERN POLYTECHNICAL UNIV
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