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A kind of composite cathode material and its preparation method and application in zinc ion battery

A composite cathode material, composite carbon technology, applied in nanotechnology for materials and surface science, positive electrode, battery electrode, etc., can solve the problem of poor cycle stability and rate performance, low specific capacity, insufficient conductivity, etc. problem, to achieve the effect of enhancing specific capacity and electronic conductivity, improving specific capacity and high capacity

Active Publication Date: 2021-09-14
LANGFANG GREEN IND TECH CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The invention overcomes the existing technical shortcomings and solves the problems of insufficient electrical conductivity, low specific capacity, poor cycle stability and rate performance of existing battery positive electrode materials. The prepared composite positive electrode material has excellent electrical conductivity and improves The battery capacity is increased, the comprehensive electrochemical performance of the battery is enhanced, and the preparation process is simple, which has very broad development prospects and economic benefits.

Method used

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  • A kind of composite cathode material and its preparation method and application in zinc ion battery
  • A kind of composite cathode material and its preparation method and application in zinc ion battery

Examples

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Effect test

Embodiment 1

[0097] This embodiment provides a composite positive electrode material, which includes: a sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material, and tetrasulfide tetrasulfide loaded on the surface of the composite carbon material Three vanadium nanoparticles; the surface includes at least one of the outer surface of conductive polymer particles, the sheet surface and interlayer of graphene, and the outer surface of carbon nanotubes; the vanadium tetrasulfide and composite carbon material The mass ratio is 5:1, the carbon nanotube length is 300nm, and the tube diameter is 10nm.

[0098] The preparation method of the positive electrode material of the method comprises the following steps:

[0099] (1) Preparation of sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material

[0100] a) adding an appropriate amount of hexadecyltrimethylammonium bromide to...

Embodiment 2

[0109] This embodiment provides a composite positive electrode material, which includes: a sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material, and tetrasulfide tetrasulfide loaded on the surface of the composite carbon material Three vanadium nanoparticles; the surface includes at least one of the outer surface of conductive polymer particles, the sheet surface and interlayer of graphene, and the outer surface of carbon nanotubes; the vanadium tetrasulfide and composite carbon material The mass ratio is 10:1, the carbon nanotube length is 500nm, and the tube diameter is 8nm.

[0110] The preparation method of the positive electrode material of the method comprises the following steps:

[0111] (1) Preparation of sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material

[0112] a) adding an appropriate amount of sodium dodecylbenzenesulfonate to the...

Embodiment 3

[0121] This embodiment provides a composite positive electrode material, which includes: a sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material, and tetrasulfide tetrasulfide loaded on the surface of the composite carbon material Three vanadium nanoparticles; the surface includes at least one of the outer surface of conductive polymer particles, the sheet surface and interlayer of graphene, and the outer surface of carbon nanotubes; the vanadium tetrasulfide and composite carbon material The mass ratio is 2:1, the carbon nanotube length is 600nm, and the tube diameter is 12nm.

[0122] The preparation method of the positive electrode material of the method comprises the following steps:

[0123] (1) Preparation of sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon materials

[0124] a) Add an appropriate amount of cetyltrimethylammonium bromide to the g...

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Abstract

The invention discloses a composite positive electrode material and its preparation method and application in zinc-ion batteries. The composite positive electrode material comprises: a sulfur-doped three-dimensional network structure conductive polymer / graphene / carbon nanotube composite carbon material, and vanadium tetrasulfide nanoparticles loaded on the surface of the composite carbon material; the surface includes at least one of the outer surface of the conductive polymer particle, the sheet surface and interlayer of graphene, and the outer surface of the carbon nanotube . The composite cathode material of the invention has excellent electrical conductivity, good cycle and rate performance, and has broad application prospects in zinc ion batteries.

Description

technical field [0001] The invention relates to the technical field of zinc ion batteries, and relates to a composite positive electrode material, a preparation method thereof and an application in zinc ion batteries. Background technique [0002] With the advancement of science and technology and the rapid improvement of human living standards, electronic technology has developed rapidly, and various civilian electronic devices have become more and more popular. The development of electronic devices such as display devices, health monitors, electronic sensors and electronic skins has attracted more and more attention from academia and industry. One of the biggest challenges in the development of electronic devices is to develop light, thin and safe portable energy storage devices that are suitable for it. This undoubtedly poses a harsh problem for the development of batteries, especially the development of lithium-ion batteries. Developing new types of energy storage syste...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/62H01M4/58H01M4/38H01M10/05H01M10/36B82Y30/00
CPCH01M4/5815H01M4/38H01M4/625H01M4/628H01M4/624H01M10/05H01M10/36B82Y30/00H01M2004/028H01M2004/021Y02E60/10H01M4/583H01M4/0471H01M4/366H01M4/364
Inventor 谭强强徐宇兴
Owner LANGFANG GREEN IND TECH CENT
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