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A preparation device and control method of sulfur cathode composite material based on the reaction between sodium thiosulfate and acid

The technology of sodium thiosulfate and composite material is applied in the field of electrochemical power supply, which can solve the problems of affecting the electrochemical performance of sulfur cathode materials, increasing the preparation cost of sulfur cathode materials, consuming large energy and time, and saving preparation costs and reducing The effect of energy consumption and convenient operation

Inactive Publication Date: 2019-08-13
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, there are certain defects in this method: 1) It takes a lot of energy and time to melt and evenly diffuse sulfur particles to the surface of conductive materials, which increases the preparation cost of sulfur cathode materials; 2) some high specific surface conductive materials such as metal framework compounds, conductive When the polymer is processed at high temperature, it is easy to destroy the structure and affect the electrochemical performance of the sulfur cathode material

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  • A preparation device and control method of sulfur cathode composite material based on the reaction between sodium thiosulfate and acid

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Embodiment 1

[0024] A sulfur cathode composite material preparation device based on the reaction between sodium thiosulfate and acid, including a mixing system, an injection system and a collection system; it is characterized in that: the mixing system includes a solid feeding pipe, an agitator, a solid-liquid mixing tank; the solid feeding pipe It is an S-shaped stainless steel tube with an inlet and an outlet. The inlet of the solid feeding pipe is in the shape of a funnel. The bottom of the funnel is connected to the liquid inlet pipe, control valve, flow meter, micro pump and sodium thiosulfate storage tank; There are 10 to 50 micropores with a diameter of 0.01 to 1 mm around the outlet of the solid feeding pipe; the top of the inlet of the solid feeding pipe is fixed with a stirring rod and a power device; the bottom end of the outlet of the solid feeding pipe is provided with blades; The side wall of the liquid mixing tank is provided with an injection liquid inlet pipe, which is conn...

Embodiment 2

[0036] With embodiment 1 operation, the mol ratio of acid solution and sodium thiosulfate solution is 2.8; Jet pressure is 5MPa;

[0037] A sulfur cathode composite material, comprising the following system:

[0038] Sodium thiosulfate, 100ml of 1mol / l solution; Sulfuric acid, 50ml of 5.6mol / l ethanol aqueous solution (volume of ethanol / volume of water is 4); polyaniline, 0.1g;

[0039] Sodium thiosulfate, 100ml of 1mol / l solution; Sulfuric acid, 50ml of 5.6mol / l ethanol aqueous solution (volume of ethanol / volume of water is 4); polyaniline, 0.2g;

[0040] Sodium thiosulfate, 100ml of 1mol / l solution; Sulfuric acid, 50ml of 5.6mol / l ethanol aqueous solution (volume of ethanol / volume of water is 4); Polypyrrole, 0.1g;

[0041] Sodium thiosulfate, 100ml of 1mol / l solution; Sulfuric acid, 50ml of 5.6mol / l ethanol aqueous solution (volume of ethanol / volume of water is 4); Polypyrrole, 0.2g;

[0042] The sulfur positive electrode composite material prepared in this example has fi...

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Abstract

The invention relates to a sodium thiosulfate and acid reaction-based preparation device for a sulfur positive electrode composite material and a control method of the preparation device. The preparation device for mixing of sodium thiosulfate and a porous conductive carrier, reaction of the sodium thiosulfate and an acid and separation of a sulfur positive electrode material and a waste liquid is designed, the mixing time of the porous conductive carrier and a sodium thiosulfate solution is controlled within 0.5-10 hours, the mole ratio of the acid and the sodium thiosulfate solution is 2-3, the injection pressure is 2-40MPa, the mass ratio of the porous conductive carrier and sulfur is 0.01-1, the type of the porous conductive carrier is controlled, thus, small particle size and uniformly sulfur / porous conductive carrier distribution of the sulfur positive electrode composite electrode material are achieved, and the prepared sulfur positive electrode composite electrode material has good electrochemical performance. The preparation device has good application prospect in the field of a lithium ion battery.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a sulfur cathode composite material preparation device and a control method based on the reaction between sodium thiosulfate and acid. Background technique [0002] Sulfur has the advantages of low price, high theoretical capacity, clean and environmental protection, and is a very promising lithium ion cathode material. However, the disadvantages of sulfur cathode materials such as poor conductivity and products easily dissolved into the electrolyte lead to a rapid decrease in capacity limit the popularization and application of sulfur cathode materials. At present, researchers use porous conductive materials with good conductivity and large specific surface area as carriers, deposit sulfur particles by heat treatment, and obtain sulfur composite cathode materials, such as sulfur / carbon, sulfur / polymer, sulfur / metal, etc. Electrochemical properties of cat...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/36H01M4/38H01M4/62H01M10/052
CPCH01M4/364H01M4/38H01M4/624H01M10/052Y02E60/10
Inventor 李婷范美强安艳玲田光磊
Owner CHINA JILIANG UNIV