CN106486648A - A kind of conducting polymer carbon sulfur positive pole - Google Patents
A kind of conducting polymer carbon sulfur positive pole Download PDFInfo
- Publication number
- CN106486648A CN106486648A CN201510550793.9A CN201510550793A CN106486648A CN 106486648 A CN106486648 A CN 106486648A CN 201510550793 A CN201510550793 A CN 201510550793A CN 106486648 A CN106486648 A CN 106486648A
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- Prior art keywords
- porous charcoal
- positive pole
- sulfur
- polyaniline
- slurry layer
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/362—Composites
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/38—Selection of substances as active materials, active masses, active liquids of elements or alloys
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- H01M4/60—Selection of substances as active materials, active masses, active liquids of organic compounds
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/62—Selection of inactive substances as ingredients for active masses, e.g. binders, fillers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Cell Electrode Carriers And Collectors (AREA)
Abstract
The invention discloses a kind of conducting polymer carbon sulfur positive pole, described positive pole includes active slurry layer and collector, wherein, active slurry layer is made up of binding agent and active material, specifically, active material is modified polyaniline nanofiber/porous charcoal/sulfur composite, in this composite, polyaniline fiber is hydrochloric acid and metal ions M n codope polyaniline fiber, its attachment winding is grown on porous charcoal particle surface, porous charcoal granule is distributed with polyaniline fiber uniform winding, the high advantage with porous charcoal electric conductivity and good cycling stability of polyaniline specific energy can effectively be combined, described composite can be widely applied to secondary cell system.
Description
Technical field
The invention belongs to electrochemistry and new forms of energy product scope, it is related to a kind of secondary cell system conducting polymer carbon sulfur positive pole.
Background technology
With developing rapidly of movable electronic and communication apparatus, the demand of secondary cell is more urgent, and increasingly tend to intensity, slim, small-sized, the exploitation of the light-duty battery with high-energy-density, it is the battery system of the most captivation meeting demand with aluminum metal or aluminium alloy is as negative pole and sulfenyl material is as positive pole secondary aluminium-sulfur battery, but, aluminium-sulfur battery yet suffers from a lot of problems at present, its technical bottleneck is that sulfur-based positive electrode material has active material loss, poorly conductive, the many polysulfides of intermediate that reduction process produces are soluble in electrolyte, partly soluble many polysulfides are diffused into and reach metallic aluminium negative terminal surface and be produced from exoelectrical reaction and be deposited on negative pole the problems such as make it be passivated, ultimately result in sulfur active material utilization low, capacity attenuation is rapid, cycle performance of battery is poor.The method generally adopting is with the Material cladding with high-specific surface area, satisfactory electrical conductivity and stability by sulfur.
Polyaniline is the extremely potential electrode material of one kind, have the advantages that raw material be easy to get, convieniently synthesized, with low cost, chemical stability good and higher than electric capacity.But in charge and discharge process, because doping reaction leads to polyaniline volumetric expansion and contraction, polyaniline molecule chain destroys, and capacity attenuation is big.For improving disadvantages mentioned above, typically polyaniline and material with carbon element are combined, most study is CNT, but CNT capacity contribution is little, can greatly reduce the energy density of electrode, and expensive.
Content of the invention
For above-mentioned prior art, the technical problem to be solved in the present invention is to provide a kind of conducting polymer carbon sulfur positive pole, this positive pole can effectively combine the high advantage with porous charcoal electric conductivity and good cycling stability of modified polyaniline specific energy, the sulfur load capacity improving existing electrode presence is low, poorly conductive, energy density is low, cycle performance difference the problems such as.
For solving above-mentioned technical problem, the present invention provides following technical scheme：
Conducting polymer carbon sulfur positive pole of the present invention, including active slurry layer 1 and collector 2, wherein active slurry layer 1 is made up of active material and binding agent, and active material is modified polyaniline nanofiber/porous charcoal/sulfur composite.
In composite of the present invention, modified polyaniline fiber 3 is hydrochloric acid and metal ions M n codope polyaniline fiber, and its attachment winding is grown on porous charcoal granule 5 surface, and porous charcoal granule is distributed with polyaniline fiber uniform winding.
Sulfur 4 in composite of the present invention by the way of heat treatment uniform load in modified polyaniline nanofiber surface and porous charcoal hole.
Preparing of conducting polymer carbon sulfur positive pole of the present invention is as follows：Active material modified polyaniline nanofiber/porous charcoal/sulfur composite is mixed and made into active slurry layer 1 according to a certain percentage with binding agent, then active slurry layer 1 is coated in thick collector 2 upper and lower surface of 0.1-0.3mm, dries the positive plate being cut into suitable size after rolling.
Conducting polymer carbon sulfur positive pole of the present invention, its active material structure is fiber and the distribution of granule uniform winding, electric charge bang path in the material can be reduced, the effective contact area of modified polyaniline fiber and electrolyte can be increased simultaneously, be conducive to giving full play to the electro-chemical activity of modified polyaniline, improve its electric conductivity and cyclicity.The interpolation of activated carbon, contribute to reducing the reunion of polyaniline fiber, so that electrolysis liquid energy is thoroughly impregnated with inside electrode material, combination electrode electrochemical reversibility can be effectively improved, reduce electrode internal resistance, the specific capacity of combination electrode can also be improved, its excellent electric conductivity also contributes to fast transferring and the conduction of electric charge and ion, thus improving the heavy-current discharge performance of combination electrode simultaneously.
Brief description
Fig. 1 is conducting polymer carbon sulfur anode structure schematic diagram of the present invention.
Fig. 2 is the structural representation of positive electrode active materials of the present invention.
Wherein, 1 active slurry layer, 2 collectors, 3 modified polyaniline fibers, 4 sulfur, 5 porous charcoal granules.
Specific embodiment
Technique effect below with reference to the design, concrete structure and generation to the present invention of embodiment and accompanying drawing is described further, to be fully understood from purpose, feature and the effect invented.The following examples describe the several embodiments of the present invention, and they are merely illustrative, and nonrestrictive.
As shown in figure 1, the conducting polymer carbon sulfur positive pole described in this specific embodiment, including active slurry layer 1 and collector 2, active slurry layer 1 is coated on the upper and lower surface of collector 2, and wherein, active slurry layer 1 is made up of active material and binding agent.
As shown in Figure 2, positive electrode active materials described in this specific embodiment are modified polyaniline nanofiber/porous charcoal/sulfur composite, wherein, modified polyaniline fiber 3 is hydrochloric acid and metal ions M n codope polyaniline fiber, its attachment winding is grown on porous charcoal granule 5 surface, porous charcoal granule is distributed with polyaniline fiber uniform winding, and sulfur 4 uniform load is in modified polyaniline nanofiber surface and porous charcoal hole.
Combination electrode based on modified polyaniline nanofiber/porous charcoal/sulfur of the present invention, in order that composite electrochemical reversibility and electrode internal resistance are minimum, in active material, porous charcoal 5 is preferably greater than 2 with the mass ratio of modified polyaniline fiber 3, less than 4.
Combination electrode based on modified polyaniline nanofiber/porous charcoal/sulfur of the present invention, for ensureing load capacity and the electrode energy density of active substance sulfur, during using heat treatment sulfur loaded, the mass ratio of modified polyaniline fiber/porous charcoal and sulfur is preferably 1:10-1:20, the two combined temp is preferably 600-750 DEG C.
Embodiment 1
A kind of combination electrode based on modified polyaniline nanofiber/porous charcoal/sulfur, including active slurry layer 1 and collector 2, active slurry layer 1 is coated on the upper and lower surface of collector 2, and wherein, active slurry layer 1 is made up of active material and binding agent.Specifically, in active slurry layer 1, active material and binding agent mass ratio are 8:2, in active material, porous charcoal 5 is 3 with the mass ratio of modified polyaniline fiber 3, and the mass ratio of modified polyaniline fiber/porous charcoal and sulfur is preferably 1:20, the combined temp with sulfur is 700 DEG C.Described positive pole is assembled into secondary aluminium cell together with barrier film, electrolyte, aluminum honeycomb, shell.
Embodiment 2
A kind of combination electrode based on modified polyaniline nanofiber/porous charcoal/sulfur, including active slurry layer 1 and collector 2, active slurry layer 1 is coated on the upper and lower surface of collector 2, and wherein, active slurry layer 1 is made up of active material and binding agent.Specifically, in active slurry layer 1, active material and binding agent mass ratio are 9:1, in active material, porous charcoal 5 is 3.5 with the mass ratio of modified polyaniline fiber 3, and the mass ratio of modified polyaniline fiber/porous charcoal and sulfur is preferably 1:15, the combined temp with sulfur is 750 DEG C.Described positive pole is assembled into secondary aluminium cell together with barrier film, electrolyte, aluminum honeycomb, shell.
Embodiment 3
A kind of combination electrode based on modified polyaniline nanofiber/porous charcoal/sulfur, including active slurry layer 1 and collector 2, active slurry layer 1 is coated on the upper and lower surface of collector 2, and wherein, active slurry layer 1 is made up of active material and binding agent.Specifically, in active slurry layer 1, active material and binding agent mass ratio are 9:1, in active material, porous charcoal 5 is 2.5 with the mass ratio of modified polyaniline fiber 3, and the mass ratio of modified polyaniline fiber/porous charcoal and sulfur is preferably 1:10, the combined temp with sulfur is 600 DEG C.Described positive pole is assembled into secondary aluminium cell together with barrier film, electrolyte, aluminum honeycomb, shell.
Embodiment 4
Charge and discharge cycles test is carried out to prepared secondary aluminium cell in embodiment 1-3, is charged to 2.5V with 1C, 0.1C discharges, discharge cut-off voltage is 1.2V.Test result such as following table.
Although being described in detail to the present invention with reference to the enforcement present invention, but those skilled in the art should be understood, in the case of without departing from the spirit and scope of the present invention described in appended claims and its equivalent, it can be made with various modifications and replace.
Claims (3)
1. a kind of conducting polymer carbon sulfur positive pole is it is characterised in that described positive pole includes active slurry layer（1）And collector（2）, wherein active slurry layer（1）It is made up of active material and binding agent, wherein active material is modified polyaniline nanofiber/porous charcoal/sulfur composite.
2. conducting polymer carbon sulfur positive pole according to claim 1 is it is characterised in that modified polyaniline fiber in this composite（3）For hydrochloric acid and metal ions M n codope polyaniline fiber, it adheres to winding and is grown on porous charcoal granule（5）Surface, porous charcoal granule is distributed with polyaniline fiber uniform winding.
3. conducting polymer carbon sulfur positive pole according to claim 2 is it is characterised in that described sulfur（4）Uniform load is in modified polyaniline nanofiber surface and porous charcoal hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201510550793.9A CN106486648A (en) | 2015-09-01 | 2015-09-01 | A kind of conducting polymer carbon sulfur positive pole |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510550793.9A CN106486648A (en) | 2015-09-01 | 2015-09-01 | A kind of conducting polymer carbon sulfur positive pole |
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| CN106486648A true CN106486648A (en) | 2017-03-08 |
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| CN201510550793.9A Pending CN106486648A (en) | 2015-09-01 | 2015-09-01 | A kind of conducting polymer carbon sulfur positive pole |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335558A (en) * | 2021-12-07 | 2022-04-12 | 西安交通大学 | Preparation method of conjugate microporous polyaniline modified battery current collector and application of conjugate microporous polyaniline modified battery current collector in lithium-sulfur battery |
-
2015
- 2015-09-01 CN CN201510550793.9A patent/CN106486648A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114335558A (en) * | 2021-12-07 | 2022-04-12 | 西安交通大学 | Preparation method of conjugate microporous polyaniline modified battery current collector and application of conjugate microporous polyaniline modified battery current collector in lithium-sulfur battery |
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