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One-dimensional porous carbon coated manganese monoxide composite electrode material and preparation method thereof

A manganese monoxide and composite electrode technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve difficult problems such as rate performance, capacity fading, poor conductivity, etc., and achieve cycle performance And the effects of excellent rate performance, high specific capacity, and simple preparation method

Inactive Publication Date: 2018-02-23
宿州学院
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when manganese monoxide is used as an electrode material for lithium-ion batteries, it also faces similar problems with other metal oxide electrodes, such as poor conductivity, capacity fading during cycling, and unsatisfactory rate performance.

Method used

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  • One-dimensional porous carbon coated manganese monoxide composite electrode material and preparation method thereof
  • One-dimensional porous carbon coated manganese monoxide composite electrode material and preparation method thereof
  • One-dimensional porous carbon coated manganese monoxide composite electrode material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0017] First, manganese chloride and 1,3,5-benzenetricarboxylic acid were dissolved in solvent deionized water at a molar ratio of 1:1, then the solution was mixed evenly, and left to grow at room temperature for 10 hours, the product was centrifuged, and deionized After washing with water and ethanol three times respectively, a manganese-based metal-organic framework template with a one-dimensional rod structure was obtained. The scanning electron microscope showed figure 1 shown;

[0018] In the second step, the temperature of the manganese-based metal-organic framework template with one-dimensional rod-like structure obtained in the first step is raised to 400° C. at a rate of 1° C. / min under an inert atmosphere of nitrogen, and kept at this temperature for 3 hours. The temperature is lowered to room temperature to obtain a one-dimensional porous carbon-coated manganese monoxide composite material, and the scanning electron microscope photo is as follows figure 2 shown. ...

Embodiment 2

[0021] First, manganese acetate and 1,3,5-benzenetricarboxylic acid were dissolved in deionized water as a solvent according to the molar ratio of 1:3, then the solution was mixed evenly, and left to grow at room temperature for 30 hours, and the product was centrifuged and washed with deionized water and anhydrous ethanol for 3 times respectively to obtain a manganese-based metal-organic framework template with a one-dimensional rod-like structure;

[0022] In the second step, the temperature of the manganese-based metal-organic framework template with one-dimensional rod-like structure obtained in the first step is raised to 700° C. at a rate of 5° C. / min under an inert atmosphere of nitrogen, and kept at this temperature for 3 hours. The temperature was lowered to room temperature to obtain a one-dimensional porous carbon-coated manganese monoxide composite material.

Embodiment 3

[0024] First, manganese sulfate and 1,3,5-benzenetricarboxylic acid were dissolved in deionized water as a solvent at a molar ratio of 1:5, then the solution was mixed evenly, and left to grow at room temperature for 40 hours, and the product was centrifuged and washed with deionized water and anhydrous ethanol for 3 times respectively to obtain a manganese-based metal-organic framework template with a one-dimensional rod-like structure;

[0025] In the second step, the temperature of the one-dimensional rod-like manganese-based metal organic framework template obtained in the first step is raised to 1000° C. at a rate of 7° C. / min under an inert atmosphere of nitrogen, and kept at this temperature for 4 hours. The temperature was lowered to room temperature to obtain a one-dimensional porous carbon-coated manganese monoxide composite material.

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Abstract

The present invention discloses a one-dimensional porous carbon coated manganese monoxide composite electrode material for lithium ion battery negative electrodes, and a preparation method thereof, wherein the porous carbon-coated manganese oxide particles in the composite material are integrally aggregated in the form of a one-dimensional rod shape, the particle size of the porous carbon coated manganese monoxide particles is 10-20 nm, and the one-dimensional porous carbon coated manganese monoxide composite electrode material is prepared by carrying out one-step thermal treatment on a metalorganic framework. According to the present invention, with the application of the composite material as the lithium ion battery negative electrode, the advantages of high initial coulombic efficiency, high specific capacity, excellent cycle performance, excellent rate performance, long cycle life and the like can be provided; and the preparation method is simple, has the low cost, and is suitablefor industrial large-scale production.

Description

technical field [0001] The invention relates to the technical field of lithium-ion battery negative electrode materials, in particular to a one-dimensional porous carbon-coated manganese monoxide composite electrode material for lithium-ion battery negative electrode materials and a preparation method thereof. Background technique [0002] In recent years, due to the increasing demand for energy, the resulting energy shortage and environmental pollution have attracted more and more attention. It is imperative to develop and utilize new clean energy sources such as solar energy, wind energy, geothermal energy and tidal energy. However, due to the intermittent and discontinuous characteristics of such energy sources, people are prompted to develop large-scale high-performance energy storage devices. At present, lithium-ion batteries are widely used in portable small electronic devices such as mobile phones due to their small size, light weight, and high energy density. Howeve...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/505H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/505H01M4/62H01M4/625H01M10/0525Y02E60/10
Inventor 邱丽娟朱光
Owner 宿州学院
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