Metal organic framework material CuBDC nano sheet, preparation method and application thereof

A metal-organic framework and nanosheet technology, applied in the field of nanomaterials and electrochemistry, can solve the problems of increased irreversible capacity of electrode materials, decreased Coulombic efficiency, large number of SEIs, etc., and achieves good cycle stability, good chemical performance, and simple process. Effect

Active Publication Date: 2016-12-21
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, due to the large amount of unstable SEI formed by nanomaterials, the irreversible capacity of the electrode material increases and the Coulombic efficiency decreases.

Method used

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  • Metal organic framework material CuBDC nano sheet, preparation method and application thereof
  • Metal organic framework material CuBDC nano sheet, preparation method and application thereof
  • Metal organic framework material CuBDC nano sheet, preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The preparation method of metal-organic framework material CuBDC nanosheet comprises the following steps:

[0027] 1) Weigh 0.3g of copper nitrate solid, 1.313g of terephthalic acid solid, and dissolve with 20ml of acetonitrile and 40ml of N,N-dimethylformamide solution;

[0028] 2) heating and stirring the solution obtained in step 1) in a water bath at 60°C for 6 hours;

[0029] 3) putting the solution obtained in step 2) into an oven at 80°C and drying for 24 hours to obtain metal-organic framework material CuBDC nanosheets;

[0030] Such as figure 1 As shown, the preparation of metal-organic framework material CuBDC nanosheets has a high purity and no other impurities exist; as figure 2 As shown in the scanning electron microscope (SEM), it is clearly observed that the thickness of the nanosheets is 15-25 nanometers, and the side width is 3-7 microns; image 3 As shown, the XPS figure shows that when the discharge is only 0.01v, Cu 2+ is reduced to Cu 0 , when...

Embodiment 3

[0040] 1) Weigh 0.3g of copper nitrate solid and 1.313g of terephthalic acid solid, dissolve with 20ml of acetonitrile and 40ml of N,N-dimethylformamide solution;

[0041] 2) heating and stirring the solution obtained in step 1) in a water bath at 60°C for 8 hours;

[0042] 3) Put the solution obtained in step 2) into an oven at 80° C. and dry for 24 hours to obtain metal organic framework material CuBDC nanosheets.

[0043]The metal-organic framework material CuBDC nanosheet active material obtained in this example was assembled into a half-cell, and a button cell was used for testing. The constant current charge and discharge test shows that the metal organic framework material CuBDC nanosheet electrode has a capacity of 114mAh / g after 100 cycles at a current density of 5000mA / g.

Embodiment 4

[0045] 1) Weigh 0.3g of copper nitrate solid and 1.313g of terephthalic acid solid, dissolve with 20ml of acetonitrile and 40ml of N,N-dimethylformamide solution;

[0046] 2) heating and stirring the solution obtained in step 1) in a water bath at 80°C for 8 hours;

[0047] 3) Put the solution obtained in step 2) into an oven at 80° C. and dry for 24 hours to obtain metal organic framework material CuBDC nanosheets.

[0048] The metal-organic framework material CuBDC nanosheet active material obtained in this example was assembled into a half-cell, and a button cell was used for testing. The constant current charge and discharge test shows that the metal organic framework material CuBDC nanosheet electrode has a capacity of 117mAh / g after 50 cycles at a current density of 5000mA / g.

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Abstract

The invention belongs to the technical fields of nano materials and electrochemistry, and particularly relates to a metal organic framework material CuBDC nano sheet and a preparation method thereof (herein BDC is 1,4-dicarboxylic benzene). The material can be used as a sodium ion battery anode material and is formed by stacking a plurality layers of the CuBDC nano sheets, wherein thickness of single nano sheet is 15-25 nm and the side width of the nano sheet is 3-7 [mu]m. The nano sheet has a porous structure of which the BET specific surface area is 530-550 m<2>/g and the pore size is less than 2 nm, wherein the porous structure belongs to microporous structure. The metal organic framework material CuBDC nano sheet has uniform morphology and has excellent electric-conductive performance; when being used as the sodium ion battery anode material, the material has excellent rate, high specific capacity and excellent circulation stability. The material has simple process, is economical, satisfies requirement of green chemistry and is easy to commercially promote.

Description

technical field [0001] The invention belongs to the technical field of nanometer material and electrochemistry, and in particular relates to a metal organic framework material CuBDC (wherein BDC=1,4-dicarboxylate benzene) nanosheet and a preparation method thereof, which can be used as a negative electrode material of a sodium ion battery. Background technique [0002] Today, with the rapid development of pure electric vehicles, hybrid vehicles, and large-scale energy storage devices, energy storage devices such as lithium ions with high energy density, high power density, and long cycle life have attracted extensive attention from researchers. Lithium-ion batteries have become the main choice of rechargeable power supplies for today's portable electronic products due to their advantages such as high specific energy, high power density, long cycle life, low self-discharge, and high cost performance. However, because the shortage of lithium resources is an important factor re...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/60H01M10/054H01M4/13B82Y30/00B82Y40/00C07C51/41C07C63/28
CPCB82Y30/00B82Y40/00C07C51/418C07C63/28H01M4/13H01M4/60H01M10/054Y02E60/10
Inventor 安琴友谢少妹张磊赵康宁
Owner WUHAN UNIV OF TECH
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