Preparation method of selenium composite electrode material

A composite electrode and composite material technology, applied in the field of electrochemical power supply, can solve problems such as poor product performance, large specific surface area, hidden dangers, etc., and achieve the effects of being conducive to industrial production, simple process, and convenient operation.

Inactive Publication Date: 2015-12-16
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrogen selenide is highly toxic, and the mixed air is explosive, and there are safety hazards in the process of use
[0003] It is undeniable that the use of materials with large specific surface area and small pore size to load selenium particles effectively limits the particle size of simple selenium, and at the same time, materials with good conductivity improve the conductivity of simple selenium. However, the current preparation process ha

Method used

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  • Preparation method of selenium composite electrode material

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Example Embodiment

[0022] Example 1

[0023] The composition design of a kind of selenium composite electrode material is:

[0024] Polyaniline, 15wt%; Simple selenium, mass fraction 77%; Graphene, mass fraction 8wt%;

[0025] A preparation method of a selenium composite electrode material: comprising the following steps:

[0026] 1) Weigh a certain mass of sodium sulfite and selenium and mix it with deionized water in a certain proportion, stir evenly: heat to reflux, control the temperature at 100°C, and reflux for 15 hours; obtain sodium selenosulfate; set the molar ratio of sodium sulfite and selenium to 2 :1:

[0027] 2) The product of step 1 is filtered and separated to obtain a sodium selenosulfate solution; dropwise into the ethanol hexane solution in proportion, and stir for 5 hours to obtain a carbon / selenium composite material; set the molar ratio of ethanol to selenium to 1.05; the volume of ethanol and hexane The ratio is 0.1;

[0028] 3) Weigh a certain mass of carbon / selenium ...

Example Embodiment

[0030] Example 2

[0031] The composition design of a kind of selenium composite electrode material is:

[0032] Polyaniline, 15wt%; Simple selenium, mass fraction 73%; Graphite, mass fraction 12wt%;

[0033] Polypyrrole, 15wt%; Selenium, mass fraction 73%; Carbon nanotubes, mass fraction 12wt%;

[0034] Polythiophene, 15wt%; Simple selenium, mass fraction 73%; Carbon black, mass fraction 12wt%;

[0035] A preparation method of a selenium composite electrode material: comprising the following steps:

[0036] 1) Weigh a certain mass of potassium sulfite and selenium and mix it with deionized water in a certain proportion, and stir evenly: heat to reflux, the temperature is controlled at 150°C, and the reflux time is 20h; obtain potassium selenosulfate; set the concentration of potassium sulfite and selenium The molar ratio is 3.5:1:

[0037] 2) The product of step 1 is filtered and separated to obtain a potassium selenosulfate solution; add ethylene glycol benzene solution ...

Example Embodiment

[0040] Example 3

[0041] The composition design of a kind of selenium composite electrode material is:

[0042] Polyaniline, 20wt%; Simple selenium, mass fraction 75%; Graphene, mass fraction 5wt%;

[0043] Polyaniline, 10wt%; Simple selenium, mass fraction 75%; Graphene, mass fraction 15wt%;

[0044] Polyaniline, 5wt%; Simple selenium, mass fraction 75%; Graphene, mass fraction 20wt%;

[0045] A preparation method of a selenium composite electrode material: comprising the following steps:

[0046] 1) Weigh a certain mass of sodium sulfite and selenium and mix it with deionized water in a certain proportion, and stir evenly: heat to reflux, the temperature is controlled at 120°C, and the reflux time is 20h; obtain sodium selenosulfate; set the molar ratio of sodium sulfite and selenium to 5 :1:

[0047]2) The product of step 1 is filtered and separated to obtain a sodium selenosulfate solution; the aqueous solution of glycerol is added dropwise in proportion, and stirred ...

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Abstract

The invention relates to a preparation method of a selenium composite electrode material. The method comprises the steps that soluble sulfite and selenium are used as raw materials, selenosulfate is generates through a reaction, a carbon material with high specific surface area and electrical conductivity is used as a carrier, selenium and polymer are deposited, and the selenium composite electrode material is obtained; the selenium deposition speed can be controlled by controlling the alcoholic solution concentration, variety and dropping-in speed; the small-particle selenium composite electrode material coated evenly is obtained. When used for a positive electrode of a lithium selenium battery, the selenium composite electrode material has the high specific capacity and excellent circulation performance, and has the good application prospect in the battery field.

Description

technical field [0001] The invention belongs to the field of electrochemical power sources, and in particular relates to a preparation method of a selenium composite electrode material. Background technique [0002] Lithium-selenium batteries have the advantages of high specific capacity and good conductivity, and are very promising energy storage batteries. Compared with other cathode materials, especially the same group of sulfur cathodes, selenium has high conductivity, high utilization rate of active materials, and small capacity fading. As a new metal lithium secondary battery, selenium has very important scientific research value and application potential. The particle size of selenium cathode material is an important factor affecting the performance of lithium selenium batteries. The large particle size of traditional selenium cathode materials leads to low capacity of lithium-selenium batteries, which restricts the promotion and application of lithium-selenium batte...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/583H01M4/62H01M4/13H01M4/133H01M4/139H01M4/1393
CPCH01M4/13H01M4/133H01M4/139H01M4/1393H01M4/366H01M4/38H01M4/583H01M4/62H01M2004/028Y02E60/10
Inventor 范美强安彦玲李婷李承珉曾令伟鞠强健吴汉美陈金丹陈达陈海潮李超
Owner CHINA JILIANG UNIV
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