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Preparation device for selenium/carbon composite electrode material and control method

An electrode material and a technology for preparing a device, applied in the field of electrochemical power supply, can solve the problems of explosive mixed air, strong toxicity of hydrogen selenide, unsafety and the like, and achieve the effects of saving preparation cost, simple process and convenient operation.

Inactive Publication Date: 2016-07-20
CHINA JILIANG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrogen selenide gas is highly toxic, and the mixed air is explosive, and there are safety hazards in the process of use
[0003] Obviously, loading selenium particles with carbon materials with large specific surface area, small pore size and good conductivity can effectively improve the conductivity and electrochemical performance of elemental selenium. However, the preparation of selenium / carbon composites by hot-melt method consumes a lot of energy, while The use of chemical methods has hidden dangers such as strong toxicity and unsafe raw material hydrogen selenide

Method used

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  • Preparation device for selenium/carbon composite electrode material and control method

Examples

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Embodiment 1

[0016] A preparation device for a selenium / carbon composite electrode material, including a stirring system, an injection system, a separation system and a waste collection system; it is characterized in that the stirring system includes 2 solid feeding pipes, a stirrer, a solid-liquid mixing tank and a heat collector type heater; the solid feeding pipe is provided with a cover and a feeding port, and 10 to 50 micropores with a diameter of 0.01 to 0.1 mm are arranged around the solid feeding pipe; the agitator is equipped with a power unit, a stirring rod, a blade, and a stirring rod There is a protective cover on the periphery; the power device of the agitator is set between two solid feeding pipes, the stirring rod passes through the solid feeding pipe, and then connects to the blade; the side wall of the solid-liquid mixing tank is provided with a liquid inlet pipe and a liquid outlet pipe. There is a collector heater at the bottom of the mixing tank; the liquid outlet pipe ...

Embodiment 2

[0025] Operation with embodiment 1, the mol ratio of sodium sulfite and selenium is 2.5; Sodium sulfite solution solubility is 12wt%; The mass ratio of selenium and carbon material is 4: 1; The mol ratio of ethanol and sodium sulfite is 1.3; Injection pressure 6MPa.

[0026] A selenium / carbon composite electrode material, comprising the following system:

[0027] Selenium simple substance, mass fraction 80%; carbon fiber, mass fraction 20wt%;

[0028] Selenium simple substance, mass fraction 80%; carbon / carbon composite material, mass fraction 20wt%;

[0029] Simple selenium, mass fraction 80%; hollow carbon spheres, mass fraction 20wt%;

[0030] Elemental selenium, mass fraction 80%; ordered mesoporous carbon, mass fraction 20wt%;

[0031] The selenium / carbon composite electrode material prepared in this example has fine particles and uniform distribution of selenium / carbon, which is used for the positive electrode of a lithium battery and has good electrochemical performan...

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Abstract

The invention relates to a preparation device for a selenium / carbon composite electrode material and a control method. The preparation device through which sodium sulfite reacts with selenium, selenosulfate reacts with ethyl alcohol, and products are separated is designed, and it is controlled that the molar ratio of sodium sulfite to selenium is 1.05:3, the solubility of a sodium sulfite solution is 12-25 wt%, the mass ratio of selenium to carbon is 5:25, the molar ratio of ethyl alcohol to selenosulfate is 1.05:1.35 and the injection pressure is 2-15 MPa, so that it is achieved that the particle size of the selenium / carbon composite electrode material is small and selenium / carbon distribution is uniform. The prepared selenium / carbon composite electrode material has good electrochemical performance. The preparation device and the control method have good application prospects in the field of lithium ion batteries.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a preparation device and a control method of a selenium / carbon composite electrode material. Background technique [0002] With the deterioration of environmental pollution and the improvement of people's awareness of environmental protection, energy storage batteries have attracted more and more attention. The positive electrode is an important part of the energy storage battery, and the material requires high electrochemical specific capacity, good conductivity, and low price. Compared with other cathode materials, especially the same group of sulfur cathodes, selenium has the advantages of high conductivity, high utilization of active materials, and small capacity fading. It is a cathode material with important scientific research value and application potential. The patent (a preparation method of Se-C positive electrode composite material for lithium...

Claims

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Application Information

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IPC IPC(8): H01M4/58H01M4/583B01J27/057
CPCB01J27/0573H01M4/58H01M4/583Y02E60/10
Inventor 黄丽艳范美强李承珉曾令伟鞠强健陈达陈海潮李超
Owner CHINA JILIANG UNIV
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