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High-performance composite positive electrode material as well as preparation method and application thereof

A composite positive electrode material and carbon nanotube technology, which is applied in the direction of nanotechnology, positive electrode, active material electrode, etc. for materials and surface science, can solve the problem of limited cycle life of positive electrode materials, unsatisfactory conductivity of zinc ion positive electrode materials, etc. problem, to achieve the effect of enhanced binding force, excellent specific capacity, and good structural stability

Active Publication Date: 2020-08-18
LANGFANG GREEN IND TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the conductivity of the zinc ion positive electrode material prepared by this method is not ideal, due to the Jahn-Teller effect during the intercalation of zinc ions in the phase transition process, the Mn 2+ Ions dissolve during cycling, so this cathode material has a limited cycle life

Method used

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  • High-performance composite positive electrode material as well as preparation method and application thereof
  • High-performance composite positive electrode material as well as preparation method and application thereof

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Experimental program
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Effect test

Embodiment 1

[0086] This embodiment provides a composite positive electrode material, the composite positive electrode material includes: at least the outer surface has MnO 2 Carbon nanotubes with a coating layer (thickness of the coating layer is 3nm), pyrolytic carbon, and dispersed in MnO 2 MnO between coated carbon nanotubes and pyrolytic carbon 2 Nanoparticles;

[0087] Taking the mass of the composite positive electrode material as 100%, the mass percentage of carbon nanotubes is 4%, MnO 2 cladding layer and MnO 2 The mass percentage of the total amount of nanoparticles is 95%, and the mass percentage of pyrolytic carbon is 1%.

[0088] The preparation method of described composite cathode material comprises the following steps:

[0089] (1) Preparation of outer surface coated with MnO 2 ordered carbon nanotubes

[0090] Immerse the anodized aluminum template (AAO template) with openings at both ends in a polypyrrole solution (0.01 mg / L mass concentration), the mass ratio of th...

Embodiment 2

[0098] This embodiment provides a composite positive electrode material, the composite positive electrode material includes: at least the outer surface has MnO 2 Carbon nanotubes, pyrolytic carbon, and carbon nanotubes with a coating layer (thickness of coating layer 5nm), and dispersed 2 MnO between coated carbon nanotubes and pyrolytic carbon 2 Nanoparticles;

[0099] Taking the mass of the composite cathode material as 100%, the mass percentage of carbon nanotubes is 2%, MnO 2 cladding layer and MnO 2 The mass percentage of the total amount of nanoparticles is 96%, and the mass percentage of pyrolytic carbon is 2%.

[0100] The preparation method of described composite cathode material comprises the following steps:

[0101] (1) Preparation of outer surface coated with MnO 2 ordered carbon nanotubes

[0102] The anodized aluminum template (AAO template) with openings at both ends was immersed in a polypyrrole solution (mass concentration of 0.5 mg / L), the mass ratio o...

Embodiment 3

[0110] This embodiment provides a composite positive electrode material, the composite positive electrode material includes: at least the outer surface has MnO 2 Carbon nanotubes, pyrolytic carbon, and carbon nanotubes with a coating layer (thickness of the coating layer 10nm), and dispersed in MnO 2 MnO between coated carbon nanotubes and pyrolytic carbon 2 Nanoparticles;

[0111] Taking the mass of the composite positive electrode material as 100%, the mass percentage of carbon nanotubes is 3%, MnO 2 cladding layer and MnO 2 The mass percentage of the total amount of nanoparticles is 90%, and the mass percentage of pyrolytic carbon is 7%.

[0112] The preparation method of described composite cathode material comprises the following steps:

[0113] (1) Preparation of ordered carbon nanotubes

[0114] The anodized aluminum template (AAO template) with openings at both ends was immersed in a polypyrrole solution (mass concentration of 0.1 mg / L), the mass ratio of AAO temp...

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Abstract

The invention discloses a high-performance composite positive electrode material as well as a preparation method and application thereof. The composite positive electrode material disclosed by the invention comprises carbon nanotubes with a MnO2 coating layer at least on the other surface, pyrolytic carbon and MnO2 nanoparticles dispersed between the carbon nanotubes with the MnO2 coating layer and the pyrolytic carbon. The composite positive electrode material obtained by the invention has good structural stability, and shows excellent specific capacity, rate capability and cycle performance.The composite positive electrode material has wide application prospects in the fields of energy storage, portable electronic equipment and the like.

Description

technical field [0001] The invention belongs to the technical field of zinc-ion batteries, and relates to a high-performance composite positive electrode material, its preparation method and application, in particular to a transition metal oxide-based composite positive electrode material, its preparation method and its application in aqueous zinc-ion batteries. Background technique [0002] With the increasingly prominent environmental and energy issues, the development and use of new green energy sources and devices has attracted widespread attention. The development of mobile electronic devices has made people put forward higher requirements for their energy storage devices, and safe batteries with high electrochemical performance and low cost have become the focus of research. At present, various electrochemical energy storage devices, such as lead-acid batteries, lithium-ion batteries, and supercapacitors, have limited their application in flexible electronic devices to...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M4/62H01M4/50H01M10/36B82Y30/00
CPCH01M4/50H01M4/625H01M4/628H01M10/36B82Y30/00H01M2004/028H01M2004/021Y02E60/10
Inventor 谭强强徐宇兴
Owner LANGFANG GREEN IND TECH CENT
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