Method of in-situ synthesis of porous nano Co3O4/C anode material

A technology of cobalt tetroxide and carbon anode material, applied in the field of electrochemistry, can solve the problems of insufficient lithium storage performance of anode materials, and achieve the effects of good cycle performance, high specific capacity and easy operation

Active Publication Date: 2018-08-24
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

[0005] In order to solve the problem of insufficient lithium storage performance of the current negative electrode materials, the present invention aims at developing new negative electrode materials, and provides a method based on rod-shaped cobalt-based metal-organic frameworks to prepare multi-level porous nano-micron rod-shaped cobalt tetroxide / carbon (Co 3 o 4 / C) Li-ion anode material method

Method used

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  • Method of in-situ synthesis of porous nano Co3O4/C anode material
  • Method of in-situ synthesis of porous nano Co3O4/C anode material
  • Method of in-situ synthesis of porous nano Co3O4/C anode material

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Embodiment 1

[0032] 1. 0.1mol of H 2 ndc, 0.4mol of Co(NO 3 ) 2 ·6H 2 O, 0.1mol Ce(NO 3 ) 3 ·6H 2 O with 6 mL DMF and 2 mL H 2 O was weighed in turn and put into a 25mL tetrafluoroethylene reactor liner, and loaded into a stainless steel reactor for compaction and tightening. Put the above reaction kettle into a blast drying oven, raise it to 100°C for 1 hour at room temperature, keep this temperature for 72 hours, and then drop it to room temperature within 72 hours by means of uniform cooling. Take out the reaction kettle, wash the obtained product with DMF for 1-2 times, put it into an ultrasonic instrument and wash it for 15 minutes, take it out, filter out the pink precipitate, wash it with methanol three times, seal it and soak it in methanol for 3 days. After 3 days, put it into a vacuum drying oven for drying. The drying step is to raise the temperature from room temperature to 80°C for 2 hours within 30 minutes, and then rise to 100°C for 30 minutes and hold it for 10 hour...

Embodiment 2

[0039] 1. 0.1mol of H 2 ndc, 0.4mol of Co(NO 3 ) 2 ·6H 2 O, 0.1mol Ce(NO 3 ) 3 ·6H 2 O with 4 mL DMF and 1 mL H 2 O was weighed in turn and put into a 25mL tetrafluoroethylene reactor liner, and loaded into a stainless steel reactor for compaction and tightening. Put the above reaction kettle into a blast drying oven, raise it to 100°C for 1 hour at room temperature, keep the temperature for 72 hours, and then cool it down to room temperature for about 72 hours in a uniform cooling method. Take out the reaction kettle, wash the obtained product with DMF for 1-2 times, put it into an ultrasonic instrument for 30 minutes, take it out, filter out the pink precipitate, wash it with methanol three times, seal it and soak it in methanol for 3 days. After 3 days, put it in a vacuum drying oven for drying. The drying step is to raise the temperature from room temperature to 100°C within 30 minutes and keep it warm for 10 hours, and then rise to 130°C after 30 minutes and keep ...

Embodiment 3

[0042] 1. 0.1mol of H 2 ndc, 0.4mol of Co(NO 3 ) 2 ·6H 2 O, 0.1mol Ce(NO 3 ) 3 ·6H 2 O with 8 mL DMF and 3 mL H 2 O was weighed in turn and put into a 25mL tetrafluoroethylene reactor liner, and loaded into a stainless steel reactor for compaction and tightening. Put the above reaction kettle into a blast drying oven, raise it to 100°C for 1 hour at room temperature, keep the temperature for 72 hours, and then cool it down to room temperature for about 72 hours in a uniform cooling method. Take out the reaction kettle, wash the obtained product with DMF for 1-2 times, put it into an ultrasonic instrument for 20 minutes, take it out, filter out the pink precipitate, wash it with methanol three times, seal it and soak it in methanol for 3 days. After 3 days, put it in a vacuum drying oven for drying. The drying step is to raise the temperature from room temperature to 90°C within 30 minutes and keep it warm for 6 hours, and then rise to 110°C after 30 minutes and keep it...

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Abstract

The invention provides a method of in-situ synthesis of a porous nano Co3O4 / C anode material and belongs to the field of electrochemical. The method particularly includes steps of: synthesizing a rod-like porous cobalt-based metal organic framework through a solvothermal method, and washing, soaking and vacuum-drying a product to obtain a precursor; performing high-temperature carbonization decomposition to the precursor in a tubular furnace with an inert gas / oxygen mixture atmosphere, thus preparing a hierarchical porous nano / micro rod-like Co3O4 / C anode material. In the invention, with the porous and large-specific-surface-area cobalt-based metal organic framework, which has periodical network crystal structure, being a self-template precursor, the hierarchical porous nano / micro rod-likeCo3O4 / C anode material is prepared through the in-situ th ermal decomposition. The method has simple process. The anode material has high conductivity and specific capacity, and is excellent in cyclic stability.

Description

technical field [0001] The invention belongs to the field of electrochemistry, and in particular relates to a method for preparing a negative electrode material of tricobalt tetroxide / carbon lithium ion battery with a multi-level porous nano-micron rod structure. Background technique [0002] Since entering the 21st century, energy issues have always been a topic of concern to society and the government. Both developed and developing countries are aware that in the foreseeable future, if there is no energy alternative to fossil fuels, crises and wars caused by energy issues will inevitably occur. It has been less than three decades since Japan's Sony Corporation first commercialized lithium-ion batteries in 1991. During this period, lithium-ion battery technology has developed rapidly, and the advantages of lithium-ion batteries as equipment power sources and power sources have become more and more prominent. Compared with lead-acid batteries, it has high energy density, n...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36
CPCH01M4/362Y02E60/10
Inventor 栗欢欢刘成洋王亚平王效宇陈龙江浩斌
Owner JIANGSU UNIV
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