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Preparation device and production method for sulfur electrode material

A technology for preparing devices and production methods, applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of reducing battery energy density and unimproved rate performance of sulfur/carbon composite materials, and achieve enhanced heat transfer, convenient operation, The effect of simple process

Inactive Publication Date: 2015-04-22
CHINA JILIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] It is undeniable that the carbon material with novel structure and small pore size effectively limits the particle size of sulfur element, and at the same time, carbon materials and polymers and other good conductive materials improve the conductivity of element sulfur. However, the addition of carbon and polymer will reduce the overall The energy density of the battery, only the sulfur content in the carbon-sulfur composite electrode material exceeds 70wt% has application value
Moreover, the rate performance of sulfur / carbon composites has not been improved

Method used

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  • Preparation device and production method for sulfur electrode material

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Experimental program
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Effect test

Embodiment 1

[0022] A sulfur electrode material preparation device includes a mixer, a sulfur storage device, a heating system, and a vacuum system; the mixer includes an upper cover, a fixing flange, and a mixer body; the heating system includes a heating sheet, a sensor, and a controller; the vacuum system includes a vacuum pump and alloy separation membrane; the heating plate and the sensor are stacked together, set on the surface of the mixer shell and covered with heat insulation layer; the controller is set at the bottom of the mixer; the vacuum pump is connected to the upper cover of the mixer through the alloy separation membrane and stainless steel tube; the mixer Stainless steel pipes are set on the left and right sides where the upper cover is connected to the alloy separation membrane, and the stainless steel pipes are connected to the circulating water; the sulfur storage device is an inverted flat hollow steel plate with porous stainless steel pipes, the number of porous stainl...

Embodiment 2

[0033] A kind of sulfur electrode material comprises following system:

[0034] 4) hollow vanadium pentoxide nanopowder (particle size, 200nm), mass fraction 30%; sulfur element, mass fraction 60%; polyaniline, mass fraction 10%;

[0035] 5) hollow vanadium pentoxide nanopowder (particle size, 200nm), mass fraction 40%; sulfur element, mass fraction 50%; polyaniline, mass fraction 10%;

[0036] 6) Hollow vanadium pentoxide nanopowder (particle size, 200nm), mass fraction 50%; sulfur element, mass fraction 40%; polyaniline, mass fraction 10%;

[0037] A sulfur electrode material preparation device and production method: it comprises the following steps:

[0038]1) Weigh the porous electrode material and elemental sulfur according to a certain ratio; put the elemental sulfur into the stainless steel tube of the sulfur storage device, and fix it to the flat hollow steel plate of the sulfur storage device and the bottom of the mixer body through movable bolts; place the porous el...

Embodiment 3

[0043] Operate with embodiment 1,

[0044] A kind of sulfur electrode material comprises following system:

[0045] 7) Hollow nickel-cobalt-lithium oxide nanopowder (particle size, 150nm), mass fraction 40%; sulfur element, mass fraction 40%; polythiophene, mass fraction 20%;

[0046] 8) hollow vanadium pentoxide nanopowder (particle size, 200nm), mass fraction 70%; sulfur element, mass fraction 20%; polyaniline, mass fraction 10%;

[0047] 9) Hollow vanadium pentoxide nanopowder (particle size, 200nm), mass fraction 59%; sulfur element, mass fraction 40%; polyaniline, mass fraction 1%;

[0048] Preparation and performance test of sulfur electrode; sulfur electrode material, acetylene black and PVDF were mixed in NMP at a mass ratio of 80:10:5, coated on aluminum foil as electrode film, metal lithium sheet as counter electrode, and CELGARD 2400 as diaphragm , 1mol / L LiPF6 / EC+DMCWEI as the electrolyte, assembled into a button battery in a glove box filled with Ar, and used th...

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Abstract

The invention relates to a preparation device and a production method for a sulfur electrode material. The sulfur electrode material preparation device comprises a mixer, a sulfur storage device, a heating system and a vacuum system, wherein the sulfur storage device is as high as the mixer body; a porous stainless steel tube is a trapezoidal stainless tube which is wide in bottom and narrow in top; holes which are 1-20 microns in hole diameter and 2-10 / square centimeters in hole count are symmetrically distributed in the surface of the stainless steel tube; the electrode material is a porous oxide electrode material dispersed with elemental sulfur; particles of the porous oxide electrode material are 10-500 nm; the porous oxide electrode material is one of hollow vanadium pentoxide nano powder, hollow nickel-cobalt-manganese-lithium oxide nano powder, hollow lithium manganate nano powder and hollow nickel-cobalt-lithium oxide nano powder; elemental sulfur accounts for 20-70% (in mass fraction) of the sulfur electrode material; 1-20% (in mass fraction) conductive polymer coats on the surface layer of the sulfur electrode material; the conductive polymer is one of polypyrrole, polyaniline, polythiophene and polyacrylonitrile. While being applied to a positive electrode of a lithium sulfur battery, the composite material has a high specific capacity and excellent circulating performance, and has a good application prospect in the battery field.

Description

technical field [0001] The invention relates to a production method of an electrode material, in particular to a preparation device and a production method for a sulfur electrode material. Background technique [0002] Elemental sulfur has the advantages of low price, abundant reserves, high specific energy, and low environmental pollution, so lithium-sulfur batteries are considered to be a promising new generation of batteries. The key bottleneck of lithium-sulfur batteries is the development of high-performance sulfur cathode materials. However, the conductivity of sulfur is very poor, which is not conducive to the high-rate performance of the battery; the volume expansion and contraction of sulfur in the process of charging and discharging will change the structure of the electrode material , detached from the metal current collector, resulting in rapid capacity fading and low sulfur utilization during cycling. The actual specific capacity of currently available lithium-...

Claims

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Application Information

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IPC IPC(8): H01M4/36H01M4/38H01M4/62
CPCH01M4/36H01M4/38H01M4/62Y02E60/10
Inventor 范美强陈金丹陈达柴文详田光磊舒康颖
Owner CHINA JILIANG UNIV
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