Preparation method of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material and application of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material

A nanoporous carbon and nanoparticle technology, applied in electrical components, battery electrodes, circuits, etc., to achieve excellent rate performance and high conductivity

Inactive Publication Date: 2019-08-30
JILIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are currently two problems to be solved: (1) how to prepare ultra-small SnSb nanoparticles (such as a diameter less than 5nm) to obtain a large specific surface area and shorten the Na + Diffusion distance; (2) How to choose a suitable substrate (currently mainly refers to carbon materials) to improve the conductivity and structural stability of electrode materials

Method used

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  • Preparation method of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material and application of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material
  • Preparation method of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material and application of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material
  • Preparation method of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material and application of SnSb nano particle/three-dimensional nitrogen-doped nano porous carbon composite material

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Experimental program
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Embodiment 1

[0068] The preparation process and steps in this embodiment are as follows:

[0069] (1) Preparation of zeolite imidazole framework material (ZIF-8): 0.734g of zinc nitrate hexahydrate and 0.81g of dimethylimidazole were added to 50ml of methanol solution, stirred evenly, and after mixing the two solutions, After stirring for 24h, the product was centrifuged and dried for 10h to obtain ZIF-8.

[0070] (2) Preparation of 3D-NPC: In a tube furnace filled with argon, ZIF-8 was heated at 2°C min -1 Raise the temperature to 300°C for 2 hours, and then at 5°C for min -1 Raise the temperature to 900°C for 5 hours, then cool the product to room temperature, wash it with dilute hydrochloric acid and water for 4 times, and finally obtain 3D-NPC.

[0071] (3) Preparation of SnSb / 3D-NPC: Add 0.14g of tin tetrachloride pentahydrate, 0.091g of antimony trichloride and 0.04g of 3D-NPC into 40ml of methanol solution, stir well, and then add 0.2g of boron Sodium hydride in 2ml of methanol s...

Embodiment 2

[0098] (1) Preparation of zeolite imidazole framework material (ZIF-8): 0.734g of zinc nitrate hexahydrate and 0.81g of dimethylimidazole were added to 50ml of methanol solution, stirred evenly, and after mixing the two solutions, After stirring for 24h, the product was centrifuged and dried for 10h to obtain ZIF-8.

[0099] (2) Preparation of 3D-NPC: In a tube furnace filled with argon, ZIF-8 was heated at 2°C min -1 Raise the temperature to 300°C for 2 hours, and then at 5°C for min -1 Raise the temperature to 900°C for 5 hours, then cool the product to room temperature, wash it with dilute hydrochloric acid and water for 4 times, and finally obtain 3D-NPC.

[0100] (3) Preparation of SnSb / 3D-NPC: Add 0.07g of tin tetrachloride pentahydrate, 0.1368g of antimony trichloride and 0.04g of 3D-NPC into 40ml of methanol solution, stir well, and then add 0.2g of boron Sodium hydride in 2ml of methanol solution, stirred for 30min, and then the product was centrifuged and dried to ...

Embodiment 3

[0110] (1) Preparation of zeolite imidazole framework material (ZIF-8): 0.734g of zinc nitrate hexahydrate and 0.81g of dimethylimidazole were added to 50ml of methanol solution, stirred evenly, and after mixing the two solutions, After stirring for 24h, the product was centrifuged and dried for 10h to obtain ZIF-8.

[0111] (2) Preparation of 3D-NPC: In a tube furnace filled with argon, ZIF-8 was heated at 2°C min -1 Raise the temperature to 300°C for 2 hours, and then at 5°C for min -1 Raise the temperature to 900°C for 5 hours, then cool the product to room temperature, wash it with dilute hydrochloric acid and water for 4 times, and finally obtain 3D-NPC.

[0112] (3) Preparation of SnSb / 3D-NPC: Add 0.21g of tin tetrachloride pentahydrate, 0.046g of antimony trichloride and 0.04g of 3D-NPC into 40ml of methanol solution, stir well, and then add 0.2g of boron Sodium hydride in 2ml of methanol solution, stirred for 30min, and then the product was centrifuged and dried to o...

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Abstract

The invention relates to a preparation method of a SnSb nano particle / three-dimensional nitrogen-doped nano porous carbon composite material and application of a SnSb nano particle / three-dimensional nitrogen-doped nano porous carbon composite material. The preparation method of the composite material comprises the steps of: a, preparing a zeolite imidazole framework structural material (ZIF-8); b,performing carbonization of the ZIF-8 in a high temperature and performing acid etching to obtain 3D-NPC; and c, dispersing a tin-antimony alloy into the 3D-NPC by employing a chemical reduction method to obtain an SnSb-3D-NPC composite material. The composite material as a negative electrode material of a sodium ion battery shows excellent cycling stability and rate capability, and the capacityof 15000 cycles in the current density of 5Ag-1 is still kept to 266.6 mAhg-1, and the capacity in the current density of the 20A g-1 can reach 359.1 mAh g-1. The preparation method of the SnSb nano particle / three-dimensional nitrogen-doped nano porous carbon composite material and application of the SnSb nano particle / three-dimensional nitrogen-doped nano porous carbon composite material can provide a new idea for improving the comprehensive performance of the sodium ion battery cathode material.

Description

[0001] Technical field: [0002] The invention relates to a preparation method of a SnSb nanoparticle / three-dimensional nitrogen-doped nanoporous carbon (SnSb / 3D-NPC) composite material and its application as a negative electrode material of a sodium ion battery. [0003] Background technique: [0004] Na-ion batteries are expected to replace lithium-ion batteries in the future, mainly due to their advantages of abundant resources, low cost and environmental friendliness. However, compared to Li + , Na + has a larger radius, resulting in Na + The kinetics are slow during intercalation / extraction of electrode materials. The theoretical capacity (35 mAh g -1 ) is not as good as in lithium-ion batteries (372mAh g -1 ), nor for reversible sodium storage. Therefore, it is extremely urgent to find anode materials for sodium-ion batteries with high energy density and power density. The theoretical capacities of metals Sn and Sb are both high, 847 (Na 15 sn 4 ) and 660mAh g -...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62
CPCH01M4/364H01M4/38H01M4/387H01M4/625Y02E60/10
Inventor 杨春成李超贾建辉文子赵明蒋青
Owner JILIN UNIV
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