Graphitized carbon coated manganese-fluorine oxide material and preparation method thereof

A technology of oxyfluoride and graphitized carbon, which is applied in nanotechnology for materials and surface science, electrochemical generators, electrical components, etc., can solve the limited improvement of MnO electrochemical performance, high manufacturing cost, and technical process. Complicated problems, to achieve the effect of excellent cycle stability, short cycle and simple experimental conditions

Inactive Publication Date: 2016-04-20
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the process of these modification measures is relatively complicated, and the manufacturing cost is relatively high. More importantly, the improvement of the electrochemical performance of MnO is limited, and the actual application of industrialization is still far away.

Method used

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  • Graphitized carbon coated manganese-fluorine oxide material and preparation method thereof
  • Graphitized carbon coated manganese-fluorine oxide material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0030] A graphitized carbon-coated manganese oxyfluoride material, the preparation method of which comprises the following steps:

[0031] 1) prepare saturated sodium hydroxide isopropanol solution, stir well and set aside; take 60ml of perfluorosulfonic acid resin solution and place it in a three-necked flask, and magnetically stir evenly; according to the Mn and C mass ratio is that the ratio of 1:16 takes by weighing manganese acetate, adds in 10ml deionized water, magnetic stirring is evenly dissolved, obtains uniform manganese acetate solution;

[0032] 2) Slowly add manganese acetate solution dropwise to the perfluorosulfonic acid resin solution, mix and stir for 1 hour to obtain mixed solution I;

[0033] 3) Slowly add the prepared sodium hydroxide isopropanol solution dropwise to the mixed solution I, adjust its pH to 7, and react with magnetic stirring for 8 hours to obtain the mixed solution II, and place the mixed solution II in a blast drying oven at 50°C to dry 1...

Embodiment 2

[0037] A graphitized carbon-coated manganese oxyfluoride material, the preparation method of which comprises the following steps:

[0038] 1) prepare saturated sodium hydroxide isopropanol solution, stir well and set aside; take 60ml of perfluorosulfonic acid resin solution and place it in a three-necked flask, and magnetically stir evenly; according to the Mn and C mass ratio is that the ratio of 8:1 takes by weighing manganese acetate, adds in 10ml deionized water, magnetic stirring is evenly dissolved, obtains uniform manganese acetate solution;

[0039] 2) Slowly add manganese acetate solution dropwise to the perfluorosulfonic acid resin solution, mix and stir for 1 hour to obtain mixed solution I;

[0040] 3) Slowly add the prepared sodium hydroxide isopropanol solution dropwise to the mixed solution I, adjust its pH to 6, and react with magnetic stirring for 4 hours to obtain the mixed solution II, and place the mixed solution II in a blast drying oven at 50°C Dry for 1...

Embodiment 3

[0044] A graphitized carbon-coated manganese oxyfluoride material, the preparation method of which comprises the following steps:

[0045] 1) prepare saturated sodium hydroxide isopropanol solution, stir well and set aside; take 60ml of perfluorosulfonic acid resin solution and place it in a three-necked flask, and magnetically stir evenly; according to the Mn and C mass ratio is that the ratio of 8:1 takes by weighing manganese sulfate, adds in 10ml deionized water, magnetic stirring is evenly dissolved, obtains uniform manganese sulfate solution;

[0046] 2) Slowly add manganese sulfate solution dropwise to the perfluorosulfonic acid resin solution, mix and stir for 1 hour to obtain mixed solution I;

[0047] 3) Slowly add the prepared sodium hydroxide isopropanol solution dropwise to the mixed solution I, adjust its pH to 8, and react with magnetic stirring for 8 hours to obtain the mixed solution II, and place the mixed solution II in a blast drying oven at 80°C Dry 8h.

...

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Abstract

The invention discloses a graphitized carbon coated manganese-fluorine oxide material, prepared by mixing manganese source and perfluorinated sulfonic acid resin solution and carbonizing the mixture. A preparation method of the graphitized carbon coated manganese-fluorine oxide material comprises the concrete steps of mixing the manganese source solution and perfluorinated sulfonic acid resin, and evenly stirring; then, adjusting a pH of the mixed solution; after a stirring reaction, sequentially drying and carrying out roasting carbonization to obtain the graphitized carbon coated manganese-fluorine oxide material. The carbon in the graphitized carbon coated manganese-fluorine oxide material is in a graphitized state, so that an ion and electron transport rate of the material can be greatly improved; the graphitized carbon coated manganese-fluorine oxide material can be taken as a high cycle stability lithium ion battery cathode material; furthermore, the preparation technology is simple and short in synthesizing time, thus being suitable for popularization and application.

Description

technical field [0001] The invention belongs to the field of new energy materials, and in particular relates to a graphitized carbon-coated manganese oxyfluoride material and a preparation method thereof. Background technique [0002] Lithium-ion batteries (LiBs) are widely used in portable communication devices such as mobile phones and laptops due to their advantages such as high voltage, large capacity, and long cycle life. However, the current commercial lithium-ion battery anode materials are mainly graphite materials, and the theoretical capacity of graphite is only 372mAh / g, which cannot meet the needs of the new generation of high-capacity lithium-ion batteries. Compared with graphite materials, new carbon materials (such as carbon nanotubes, mesoporous carbon) and transition metal oxides (such as manganese oxide, iron oxide, nickel oxide, copper oxide, etc.) have higher specific capacity. However, the huge volume change of metal oxides is unavoidable during the cha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/36H01M4/50H01M4/58H01M4/62H01M10/0525B82Y30/00B82Y40/00
CPCB82Y30/00B82Y40/00H01M4/366H01M4/50H01M4/582H01M4/625H01M4/628H01M10/0525Y02E60/10
Inventor 唐浩林魏希王锐蔡世昌曾燕
Owner WUHAN UNIV OF TECH
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