Porous carbon-supported trimanganese tetraoxide nanoparticle composite material and preparation method thereof

A technology of manganese tetroxide nanometers and manganese tetroxide particles is applied in the fields of material synthesis and electrochemistry to achieve the effects of improving cycle performance and charge-discharge performance, low cost, and suppressing volume expansion

Active Publication Date: 2020-06-12
SHANGHAI JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The CNTs and organic reactants used in this method are also high-priced materials, and no electrochemical tests have been performed on the materials

Method used

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  • Porous carbon-supported trimanganese tetraoxide nanoparticle composite material and preparation method thereof
  • Porous carbon-supported trimanganese tetraoxide nanoparticle composite material and preparation method thereof
  • Porous carbon-supported trimanganese tetraoxide nanoparticle composite material and preparation method thereof

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Experimental program
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Embodiment 1

[0036] This embodiment provides a porous carbon-supported manganese tetraoxide nanoparticle composite material and a preparation method thereof. The porous carbon-supported manganese tetraoxide nanoparticle composite material includes nano-manganese tetraoxide with a weight percentage content of 50%. Manganese particles and a three-dimensional porous carbon material support with a content of 50% by weight. Its preparation steps are as follows:

[0037] 1. Take 200g ginkgo leaves with electronic balance and treat with 2mol / L concentrated hydrochloric acid for 12h under magnetic stirring;

[0038] 2. After filtering the above materials, wash them three times with ethanol and water respectively, and dry them;

[0039] 3. Treat the product at 700°C for 240 minutes to complete carbonization and obtain a porous carbon scaffold;

[0040] 4. Ball mill the porous carbon support material, adopt wet ball milling, add acetone, rotate at a speed of 400r / min, ball mill for 90min in total,...

Embodiment 2

[0051] This embodiment provides a porous carbon-supported manganese tetraoxide nanoparticle composite material and a preparation method thereof. The porous carbon-supported manganese tetraoxide nanoparticle composite material includes nano-manganese tetraoxide with a content of 80% by weight. Manganese particles and a three-dimensional porous carbon material support with a content of 20% by weight. Its preparation steps are as follows:

[0052] 1. Adopt electronic balance to take the ginkgo leaf of 200g and adopt shearing machine to process with the concentrated hydrochloric acid of 2mol / L under magnetic stirring for 12h;

[0053] 2. After filtering the above materials, wash them three times with ethanol and water respectively, and dry them;

[0054] 3. Treat the product at 1000°C for 360 minutes to complete carbonization and obtain a porous carbon scaffold;

[0055] 4. Ball mill the porous carbon support material, adopt wet ball milling, add acetone, rotate at a speed of 40...

Embodiment 3

[0063] This embodiment provides a porous carbon-supported manganese tetraoxide nanoparticle composite material and a preparation method thereof. The porous carbon-supported manganese tetraoxide nanoparticle composite material includes nano-manganese tetraoxide with a weight percentage content of 65%. Manganese particles and a three-dimensional porous carbon material support with a content of 35% by weight. Its preparation steps are as follows:

[0064] 1. Adopt electronic balance to take the ginkgo leaf of 200g and adopt shearing machine to process with the concentrated hydrochloric acid of 2mol / L under magnetic stirring for 12h;

[0065] 2. After filtering the above materials, wash them three times with ethanol and water respectively, and dry them;

[0066] 3. Treat the product at 850°C for 300 minutes to complete carbonization and obtain a porous carbon scaffold;

[0067] 4. Ball mill the porous carbon support material, adopt wet ball milling, add acetone, rotate at a spee...

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Abstract

The invention provides a porous carbon supported trimanganese tetraoxide nanoparticle composite material and a preparation method thereof. The composite material is prepared from, by weight, 50%-80% of trimanganese tetraoxide nanoparticles and 20%-50% of three-dimensional porous carbon material stent prepared from ginkgo leaves. When the composite material is prepared, manganese acetate and potassium hydroxide are added into the three-dimensional porous carbon material stent according to the stoichiometric ratio of carbon to trimanganese tetroxide, and the composite material is obtained after reacting is conducted. According to the porous carbon supported trimanganese tetraoxide nanoparticle composite material, the reversible capacity of the composite material can reach 500 mAh / g or above after charging and discharging are conducted 50 times under the electric current density of 100 mA.g<-1>.

Description

technical field [0001] The invention belongs to the technical field of material synthesis and electrochemistry, and relates to a lithium ion battery negative electrode material and a preparation method thereof, in particular to a porous carbon-supported trimanganese tetraoxide nanoparticle composite material and a preparation method thereof. Background technique [0002] The metal oxide trimanganese tetroxide has a high theoretical capacity (937mA h g -1 ) and a wide range of sources of materials have attracted more and more attention from researchers. However, due to the problems of low conductivity and volume expansion, poor rate performance during cycling, and low cycle stability, the practical application of manganic manganese tetraoxide anode is greatly limited. [0003] In the prior art, the patent document CN104425801A discloses an electrode composite material and its preparation method, as well as a negative electrode and a battery with the electrode composite mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/50H01M4/36
CPCH01M4/364H01M4/50H01M2004/021Y02E60/10
Inventor 符策煌李福气潘浩
Owner SHANGHAI JIAOTONG UNIV
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