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Flexible vanadium tetrasulfide-carbon composite anode material and preparation method and application thereof

A technology of vanadium tetrasulfide and positive electrode materials, applied in the direction of positive electrodes, active material electrodes, battery electrodes, etc., can solve problems such as poor conductivity and insufficient capacity, and achieve increased capacity, improved electronic conductivity, and enhanced electrochemical performance Effect

Active Publication Date: 2019-07-05
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of poor electrical conductivity and insufficient capacity of the existing water-based zinc-ion battery cathode materials, the object of the present invention is to provide a flexible vanadium tetrasulfide-carbon composite cathode material and its preparation method and application. With excellent conductivity and flexibility, V 3 S 4 The structure is conducive to the insertion and extraction of zinc ions, which improves the storage and transportation of zinc ions and the capacity of the battery. Carbon fiber greatly improves the electronic conductivity of the positive electrode material and further enhances the electrochemical performance of the battery. The entire electrode With excellent flexibility, it still has excellent electrochemical performance after repeated bending

Method used

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  • Flexible vanadium tetrasulfide-carbon composite anode material and preparation method and application thereof
  • Flexible vanadium tetrasulfide-carbon composite anode material and preparation method and application thereof
  • Flexible vanadium tetrasulfide-carbon composite anode material and preparation method and application thereof

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Effect test

Embodiment 1

[0045] (1) Preparation of composite material: 20% of sulfur powder and 80% of vanadyl acetylacetonate powder by mass percentage, according to the ratio of solid powder: N-N dimethylformamide (DMF) solution=1g:10mL, add DMF solution, in Stir and mix evenly at 65°C, control the stirring rate to 600r / min, and stir for 12h to ensure that the solid powder is evenly mixed in the DMF solution; pour the obtained mixed solution into a high-temperature and high-pressure reactor, and pour it into Add a piece of carbon fiber cloth of 2cm×2cm, then place the reaction kettle in an oven, react at 140°C for 2h, and rinse it with ethanol for 3 times.

[0046] (2) Preparation of flexible battery composite positive electrode material: take the composite material obtained in (1) in a tube furnace, and calcinate it for 2 hours at 400° C. under a nitrogen atmosphere to obtain a flexible battery composite positive electrode material. Its XRD diagram is shown in figure 1 , SEM and TEM pictures see ...

Embodiment 2

[0050] (1) Preparation of composite material: 30% of sulfur powder and 70% of vanadyl acetylacetonate powder by mass percentage, according to the ratio of solid powder: N-N dimethylformamide (DMF) solution=1g:20mL, add DMF solution, in Stir and mix evenly at 70°C, control the stirring rate to 600r / min, and stir for 24 hours to ensure that the solid powder is evenly mixed in the DMF solution; pour the obtained mixed solution into a high-temperature and high-pressure reactor, and add A piece of commercial carbon fiber cloth of 2cm×2cm was used, and then the reactor was placed in an oven, reacted at 160°C for 3 hours, and then rinsed with ethanol for 3 times.

[0051] (2) Preparation of flexible battery composite positive electrode material: take the composite material obtained in (1) in a tube furnace, and calcinate it for 2 hours at 500° C. under a nitrogen atmosphere to obtain a flexible battery composite positive electrode material.

[0052] (3) Assembly of flexible battery: ...

Embodiment 3

[0055] (1) Preparation of composite material: 40% of sulfur powder and 60% of vanadyl acetylacetonate powder by mass percentage, according to the ratio of solid powder: N-N dimethylformamide (DMF) solution=1g:30mL, add DMF solution, in Stir and mix evenly at 80°C, control the stirring rate to 600r / min, and stir for 24 hours to ensure that the solid powder is evenly mixed in the DMF solution; pour the obtained mixed solution into a high-temperature and high-pressure reactor, and add A piece of commercial carbon fiber cloth of 2cm×2cm was used, and then the reactor was placed in an oven, reacted at 180°C for 4 hours, and rinsed with ethanol for 3 times.

[0056] (2) Preparation of flexible battery composite positive electrode material: take the composite material obtained in (1) in a tube furnace, and calcinate it for 4 hours at 700° C. under a nitrogen atmosphere to obtain a flexible battery composite positive electrode material.

[0057] (3) Assembly of flexible battery: The f...

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Abstract

The invention discloses a flexible vanadium tetrasulfide-carbon composite anode material and a preparation method and application thereof. The material consists of a flexible carbon fiber and a nanometer spherical V3S4 loaded to the surface of the flexible carbon fiber, wherein the loading capacity of the nanometer spherical V3S4 is 1-2mg / cm<2>. The composite anode material exhibits excellent electrical conductivity and flexibility, the crystal structure of the V3S4 is favorable for zinc ions to be embedded and separated, the storage and the transportation of the zinc ions are improved, the capacity of a battery is improved, the carbon fiber greatly improves the electron electrical conductivity of the anode material, the electrochemical performance of the battery is further enhanced, and the whole electrode exhibits excellent flexibility and also exhibits excellent electrochemical performance after the electrode is bent for multiple times.

Description

technical field [0001] The invention relates to a flexible vanadium tetrasulfide-carbon composite positive electrode material and a preparation method and application thereof, belonging to the technical field of water-based zinc-ion batteries. Background technique [0002] With the rapid development of science and technology and industrialization, the living standards of the majority of the people have also benefited from the emergence of various civilian electronic devices and are increasing day by day. As a tool for people's daily work and life, these emerging electronic products generally use electric energy as their energy source, and the development direction of today's electronic equipment is usually lightweight, portable, and long-lasting. On the other hand, the battery must have both universality and safety, which undoubtedly poses a harsh problem for the development of the battery. For example, in the hot field of flexible electrical energy devices, if the battery ...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/58H01M4/583H01M10/36
CPCH01M4/366H01M4/5815H01M4/583H01M10/36H01M2004/028Y02E60/10
Inventor 刘赛男蔡圳阳张强
Owner CENT SOUTH UNIV
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