CN201536138U - Lithium-sulfur battery - Google Patents
Lithium-sulfur battery Download PDFInfo
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- CN201536138U CN201536138U CN2009201741937U CN200920174193U CN201536138U CN 201536138 U CN201536138 U CN 201536138U CN 2009201741937 U CN2009201741937 U CN 2009201741937U CN 200920174193 U CN200920174193 U CN 200920174193U CN 201536138 U CN201536138 U CN 201536138U
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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
Abstract
The utility model relates to a lithium-sulfur battery comprising an anode, a cathode, electrolyte and a diaphragm, wherein the anode comprises anodal active substances and an anodal current collector which are selected from lithium metal, lithium alloy and lithium carbon; the cathode comprises cathedral active substances and a cathedral current collector, and the cathedral active substances contain at least one sulfenyl compound selected from sulfur element and organic sulfur compound; the electrolyte comprises lithium salt and mixed organic solvent; the diaphragm is arranged between the cathode and the anode and divides the electrolyte into anodolyte and catholyte to allow the lithium ion to pass; and the cathedral active substance adopts carbon-sulfur with a nano-structure. The cathode material can efficiently prevent the dissipation of intermediate reactive compound of sulfur, thereby prolonging the service life and improving the power density of the lithium-sulfur battery.
Description
Technical field
The utility model relates to a kind of lithium-sulfur cell, relates in particular to a kind of lithium-sulfur cell of high-energy-density.
Background technology
Along with exhausting gradually of oil, a large amount of automobiles and pollute impact to the whole world more and more attract much attention for electrical equipment and automobile provide safety, cheap, high-energy-density and long-life rechargeable battery.The energy density of rechargeable lithium battary in all batteries is the highest, has become the energy storage units of present most of mobile electronic product.Although most of electronic equipment only needs the medium speed that discharges and recharges, in some new application, as the regenerative braking of hybrid vehicle, energy backup, portable power tool need high-energy-density and high-power battery simultaneously.This point still is difficult to realize for present lithium battery.Good lithium battery requires battery material to have the ability of highly reversible storage lithium, fast the ability of transfer lithium ions and electronics.This requires used material to have high lithium ion diffusion velocity to satisfy high-power security needs.
As anode material, cathode material is the transition metal oxide or the phosphate of lithium to present lithium battery with carbon.In general, the operation principle of the cathode material of chargeable lithium cell is: store lithium ion and electronics by the reduction reaction of inserting lithium ion and transition metal ions in its crystal structure.Under corresponding high potential, lithium ion can be deviate from cathode material and embed repeatedly.As topotactic reaction, the charging storage capacity innately is exactly limited, the chances are in any expected system 300mAh/g.The material that possesses good power characteristic that people make at present, maximum electric quantity density is 183mAh/g
3And commercial at present cathode material, LiCoO
2The chances are 140mAh/g, LiMn
2O
4The chances are 100mAh/g, and LiFePO
4The chances are 150mAh/g, the energy density of these materials and people's demand differ also distant.
Lithium-sulphur rechargeable battery is to promise to be one of candidate of following lithium battery most.This lithium-sulfur cell is different from common lithium ion battery, and it is done the cathodic metal lithium with sulphur and does anode, according to the work of non local regular reaction " assimilation " pattern.In the at present known solid chemical compound cathode material that can be used as primary cell and secondary cell, the theoretical electric quantity density of lithium metal and sulphur is the highest, is respectively 3830mAh/g and 1670mAh/g.In all rechargeable batteries, the redox couple of lithium-sulfur cell is one of energy density soprano.If cell reaction generates Li fully
2S, its weight energy density and volume energy density reach 2 respectively, 500Wh/kg, 2,800Wh/L
6-7The natural abundance of elementary sulfur in the earth's crust is big, has the advantage of cheapness, low toxicity, and this is vital for lithium battery of future generation.
Although lithium-sulfur cell has these advantages, also have many challenge demand sides right.At first sulphur is the material (～5 * 10 of a high-insulation
-30S/cm, 25 ℃), cause electrochemical reaction to be difficult for realizing, be difficult to directly be used as cathode material.In fact, the organic substance of sulphur or sulfur-bearing is an insulating material.In order under big electric current, to have high conductive characteristic, the ability of insulation ion and have reversible electrochemical reaction, sulphur must keep tight the contact to use as cathode material with additional electric conductor.For this reason, utilized different carbon-sulfur compounds in the prior art.But be subjected to the restriction of contact area.The electric quantity density of report is between 300-550mAh/g at present
9In order to obtain the cathode ion conductor of sulfur-bearing, usually in catholyte, be used as charge transfer mediator and ion conductor with liquid electrolyte.
The second, the dissolubility of anion in polar organic solvent of the polysulfide intermediate that forms in charging and discharging process is very high, and these anion can permeate and pass barrier film arrival anode and produce sediment (Li at anode
2S
2And Li
2S), in the repeated charge process of battery, cause the decline of capacitance.In the process of discharge, solid sediment expansion is stacked into cathode surface and also can causes electrochemical reaction irreversible, and then causes the mass loss of active matter.
The 3rd, in the process of cycle charge-discharge, can grow dendrite gradually on the lithium electrode, the dendrite continued growth is extended, and finally passes electrolyte and arrives negative electrode, may cause the internal short-circuit of battery, this is breakneck, and therefore the cycle charge discharge electric life of this battery has only several times.
At these challenges, aspect the suitable electrolyte some progress have been arranged improving electrode material, Optimizing operation process and select recently, such as the diaphragm of some novel electrolyte and protection lithium anode.With respect to the development of electrolyte, the progress of additive and anodic protection is bigger.
And the bottleneck problem of negative electrode still exists, because the solubility of polysulfide, lithium-sulfur cell lacks breakthrough.For the sulfide cathode material, some significant progress are also arranged recently, although even not enough in the electrochemistry performance of reality.These progress comprise unordered mesoporous carbon and sulphur by the compound of forming at 1: 1 and the advantage of coupled ion liquid, obtain very high initial electric weight but in the repeated charge electric weight decay very fast.Sulphur is embedded into also obtains some results likely in the conducting polymer, but it is very big to polarize, cause output voltage lower thereby reduced the energy density of battery, and the load capacity of active material limited (being less than 55%) in the compound of sulphur polymer, the surface area of conducting polymer is very little.But the capacity of these lithium-sulfur cells and repeatable some problems in addition need to solve, even also be the same in polymer.
Organic sulfur compound and contain sulfur compound and replace elemental sulfur and application is also arranged as cathode material.Although some organic sulfur polymers, as DMcT (2,5-dimercapto-1,3, the 4-thiadiazole), reasonable performance is arranged in power density and cycle life, but it is obvious especially that their electric quantity density reduces, and almost is less than 40% of theoretical electric weight, even like this too under than higher temperature.Though showing carbon-sulfur compound or conducting polymer-sulfur compound, existing report on available electric weight and cycle life, do not have big improvement.As if but reminds people will obtain a good sulphur cathode material, solve the electro-chemical activity and the solution loss of polysulfide intermediate in electrolyte of sulphur simultaneously.
The utility model content
The utility model provides a kind of lithium-sulfur cell with high-energy-density and high cycle life.
For achieving the above object, the technical solution of the utility model is: a kind of lithium-sulfur cell, comprise anode, and comprise the anode active material and the anode collector that are selected from lithium metal, lithium alloy and lithium carbon; Negative electrode comprises cathode active material and cathode current collector, and described cathode active material comprises at least a sulfur-based compound that is selected from element sulphur and organosulfur compound; Electrolyte comprises electrolyte lithium salt and mixed organic solvents; And barrier film, be located between negative electrode and the anode, electrolyte is divided into anodolyte and catholyte and permission lithium ion passes through; Described cathode active material is the carbon-sulphur (nanostructuredcarbon-sulphur) of nanostructure.
Compared with prior art, the utility model is a cathode active material by the carbon-sulphur that adopts nanostructure, the form of the compound that cathode material forms with the particle by nano-scale is occurred, improved the ionic conductivity of cathode material, reduced ion and electronics resistance in the inside battery conduction.Simultaneously, use to contain the lithium composite coating, cathode material can effectively prevent the outflow of the intermediate compound of reaction of Salmon-Saxl, thereby, improved the cycle life and the power density of lithium-sulfur cell.
Preferably, the carbon-sulfur compound particle size of nanostructure reaches submicron order, such as hundreds of nanometer or tens nanometers.The particle size of such cathode active material is less than 1 micron, and the resistance of material is low, is easier to passing through of lithium ion, especially under the situation of big charge/discharge rates, effectively solves the low problem of power density of rechargeable battery.
Preferably, the coating that has lithium compound on the described cathode active material.By being media with the polypeptide that contains cysteine, lure that superionic conductors (such as lithium metasilicate) forms crystallization and nanocrystal at cathode surface into, stop the dissolving of polysulfide thus, still can allow lithium ion to pass through simultaneously.Thereby the dissolving of cathode material polysulfide in the course of reaction of battery is suppressed, and has effectively improved the cycle life of lithium-sulfur cell.
Preferably, described anodolyte contains N-methyl-N-propyl group piperidines.Help in charging and discharging process stoping the growth of the dendrite of lithium electrode, avoided the danger that is short-circuited to a certain extent, further improve the cycle life of lithium-sulfur cell.
Preferably, described catholyte contains N-methyl-N-butyl piperidine.Thereby the dissolving of the polysulfide that the sulphur negative electrode forms in the inhibition discharge process has avoided capacity in the repeated charge process of battery to descend and the mass loss of active matter, has improved the cycle life of lithium-sulfur cell.
Preferably, described barrier film is a lithium superionic conductors glass-film (LISICON).Lithium superionic conductors glass-film is the good barrier film of a kind of ionic conduction performance, and the cycle life of carbon sulphur battery is effectively improved.
Preferably, be coated with carbon nano pipe array on the described cathode current collector.Because traditional carbon structure is irregular, repeatedly after the circulation sex change can take place as electrode, thereby influence battery life.Carbon nano pipe array makes electrode integral material Stability Analysis of Structures, conducts electricity very well, and resistance value has reduced, and corresponding in-fighting is also little, and therefore, the cycle life of lithium-sulfur cell is extended.
Preferably, described electrolyte lithium salt is selected from lithium hexafluoro phosphate (LiPF
6), LiBF4 (LiBF
4), lithium perchlorate (LiClO
4) at least a.
Preferably, described organic solvent comprises dimethoxy-ethane (DME), ethene carbonic ether (EC), diethyl carbonic ether (DEC), propylene carbonate (PC), 1,3-dioxolane (DIOX), ether, glyme, lactone, sulfone, at least a in the sulfolane.
Preferably, described organic solvent comprises polymer gel.Electrolyte is arranged in the battery with the form of gel, helps stoping the seepage of potential battery electrolyte, avoids environment is polluted.
Preferably, described catholyte contains solid polymer.This electrolyte can be stablized the discharge performance of cathode material, improves the cycle life and the power density of carbon sulphur battery.
Preferably, described anode comprises the diaphragm of one deck lithium metal at least, such as LiPON compound diaphragm.The protection lithium is not subjected to the potential hazard of surrounding environment, such as the growth that prevents dendrite.Simultaneously, can also the conductive lithium ion.
The utility model selects suitable anolyte to suppress the dendrite growth of lithium metal anode under the prerequisite that does not influence the cathode material performance, and can suppress by selecting suitable catholyte from the problems of dissolution of negative electrode polysulfide.Do not use alkaline solution in the utility model, lithium ion super conductor glass-film is enhanced in the stability of the cyclic process of battery at present.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and embodiments.
Fig. 1 is the schematic diagram according to the each several part structure of rechargeable battery of the present utility model.
Fig. 2 is the battery structure schematic diagram of an embodiment of the present utility model.
Fig. 3 is the cathode construction schematic diagram of the battery of another embodiment of the present utility model.
Fig. 4 is the anode construction schematic diagram of the battery of another embodiment of the present utility model.
Wherein,
1 anode collector, 4 barrier films, 8 dead rings
2 anode active materials, 5 catholytes, 9 lithiumation thing coatings
2a protective layer 6 cathode active materials 10 negative electrodes
3 anodolytes, 7 cathode current collectors, 20 anodes
Embodiment
Referring to accompanying drawing 1, the utility model provides a kind of lithium-sulfur cell with high-energy-density and high cycle life.Lithium-sulfur cell comprises positive pole, negative pole, the barrier film of separation both positive and negative polarity, and electrolyte wherein.
In the present embodiment, the positive pole of lithium-sulfur cell, just negative electrode 10, comprise cathode current collector 7 and cathode active material 6.The negative pole of lithium-sulfur cell, just anode 20, comprise anode collector 1 and anode active material 2.Can see that from accompanying drawing be provided with barrier film 4 between cathode active material 6 and the anode active material 2, anodolyte 3 and catholyte 5 are separated by barrier film 4.Thereby the ion that produces in the charge and discharge process of battery can transmit by barrier film 4, and electrolyte itself has been divided into anodolyte 3 and catholyte 5 two parts.
The negative pole 20 of lithium-sulfur cell comprises anode collector 1 and anode active material 2.Wherein, collector is that those of ordinary skills are known, is used for effective collection and results from the electric current of anode and provide effective electric interface that electric current is caused external circuit.The material of collector can be easy to select from suitable material based on the utility model.Such as, anode collector 1 can be the material of selecting for use usually, can include but are not limited to copper, foam copper or nickel foam.
Anode active material 2 is generally lithium metal, also can be lithium carbon or lithium alloy.Lithium alloy comprises lithium/aluminium alloy or lithium/ashbury metal.Material with carbon element comprises crystalline carbon, agraphitic carbon or their mixture.In order to protect lithium metal not to be subjected to the potential hazard of surrounding environment, comprise the growth of dendrite, the anode active material 2 in the utility model has adopted the lithium metal that has diaphragm.Wherein, diaphragm can be the LiPON compound interfacial film that forms on the lithium surface.At this, diaphragm can allow ion to pass through, thereby and stops other compounds by the infringement anode.Certainly, also can adopt copper, so not need to form the lithium nitrogen compound and can form protection lithium metal as diaphragm.If adopt lithium alloy to form the diaphragm of lithium metal, then this diaphragm can make the metallic element that can measure in the anode active material except lithium.Those skilled in the art can know that alloy material is not limited in lithium/aluminium alloy above-mentioned or lithium/ashbury metal.Compare as anode material with selecting lithium metal, select lithium alloy, can effectively stop the growth of lithium dendrite, hinder lithium anode and be corroded, thereby improve the cycle life of battery as anode material.
The positive pole 10 of lithium-sulfur cell comprises cathode current collector 7 and cathode active material 6.Wherein, cathode current collector can include but are not limited to aluminium.Those skilled in the art can know that the material of cathode current collector can also be nickel or other metal.In order to increase and the contacting of cathode active material, the material of cathode current collector can be selected the aluminium with carbon coating for use.Compare with simple aluminium collector, the aluminium collector that carbon applies has good adhesion properties, lower contact resistance, and can suppress the corrosion of polysulfide.Preferably, also can select the aluminium of carbon nano-tube coating array for use.Because traditional carbon structure is irregular, repeatedly after the circulation sex change can take place as electrode, thereby influence battery life.Carbon nano pipe array is made up of multi-walled carbon nano-tubes, does not have agraphitic carbon.Electro-chemical test shows, carbon nano pipe array has bigger electric capacity and electric transmission speed faster.Carbon nano pipe array makes electrode integral material Stability Analysis of Structures, conducts electricity very well, and resistance value has reduced, and corresponding in-fighting is also little, and therefore, the cycle life that is coated with the lithium-sulfur cell of carbon nano pipe array on the cathode current collector is extended.
During the lithium-sulfur cell discharge, at negative electrode, sulphur is reduced, and forms polysulfide.Often sulfide is present in the electrode with the precipitation state known polysulfide with dissolved state.Cathode active material comprises at least a sulfur-based compound that is selected from element sulphur and organosulfur compound.In the utility model, the carbon sulphur of selecting carbon-sulfur compound or nanostructure is as cathode active material.The carbon sulphur of nanostructure is porous material, comprises the nanohole array that can embed sulphur.This material can prevent the outflow of the intermediate compound that element sulphur produces in charge and discharge process, improve the cycle life of lithium-sulfur cell.It will be recognized by those skilled in the art that the cathode active material of other types, as nanometer sulphur, nano-silicon-sulphur, nanometer germanium-sulphur also can be applied to this.Cathode material exists with the form of the compound that the particulate by nano-grade size forms, and has improved the ionic conductivity of cathode material, has reduced the resistance of ion in the inside battery conduction.The complex particle of the carbon sulphur of nanostructure is the submicron-scale particulate, and just complex particle is of a size of tens nanometers or hundreds of nanometer.Produce more middle particle edges thus, help the transmission of lithium ion.Especially under the situation of big charge/discharge rates, reduced the resistance of ion in the inside battery conduction.Simultaneously, this cathode material can effectively prevent the outflow of the intermediate compound of reaction of Salmon-Saxl, thereby, improved the cycle life and the power density of lithium-sulfur cell.
In order to prevent the dissolving of the polysulfide that cathode material produces in charge and discharge process, the coating that contains lithium compound is applied on the cathode material.In order to form the described coating that contains lithium compound, can be that media is coated in the cathode material surface with the polypeptide that contains cysteine earlier, it is dipped in the solution that contains described lithium compound then, make described lithium compound be attached to cathode surface, form crystallization and nanocrystal, and take this to stop the dissolving of polysulfide, still can allow lithium ion to pass through simultaneously.The polypeptide that contains cysteine has the two poles of the earth, and a utmost point at NAC place can form cystine linkage with sulphur and attached on the sulphur; An other utmost point can combine with lithium compound, such as, silicic acid lithium salts, phosphoric acid lithium salts, even lithium superionic conductors film.So,, will form the nanocrystal of these lithium-containing compounds of one deck on the surface of the carbon sulphur cathode material of nanostructure by containing the effect of cysteine polypeptide.After the lithium-containing compound protective layer forms, can carry out other follow-up treatment process, as heating.If carry out heating process, can evaporation after polypeptide is heated and lose, and only stay the lithium-containing compound diaphragm.Thus, form the protective finish of negative electrode.Thereby the dissolving of cathode material polysulfide in the course of reaction of battery is suppressed, and has effectively improved the cycle life of lithium-sulfur cell.
Can see that catholyte has adopted different materials with anodolyte in the utility model, thereby be adapted to the reaction of cathode active material and anode active material respectively.In the utility model, electrolyte comprises electrolyte lithium salt and mixed organic solvents at least.
Electrolyte lithium salt can include but are not limited to LiPF6, LiBF4, perhaps lithium perchlorate (LiClO4).It will be recognized by those skilled in the art that lithium salts can effectively increase electrolytical ionic conductivity.
The mixed organic solvents of anodolyte can be common organic aqueous solution, as dimethoxy-ethane (DME), ethene carbonic ether (EC), diethyl carbonic ether (DEC), propylene carbonate (PC), 1,3-dioxolane (DIOX), various ether, glyme, lactone, sulfone, sulfolane or above mixture.Such as adopting 1,3-dioxolane (DIOX).Can be polymer also, as polyacrylonitrile.Also can comprise gel, as poly (PEGMEMA1100-BMI) gelatin polymer.If adopt this electrolyte of gel,, certain deformation can take place, so too big variation can not take place in the manufacture craft of corresponding battery because itself is a kind of soft material.
Electrolyte is arranged in the battery with the form of gel, helps stoping the seepage of potential battery electrolyte, avoids environment is polluted.Anodolyte can also comprise the ionic liquid that contains N-methyl-N-propyl group piperidines.The low-temperature molten salt that is in a liquid state under the normal temperature that ionic liquid is made up of ion has good ionic conductivity.Adopt this ionic liquid, help in charging and discharging process stoping the growth of the dendrite of lithium electrode, avoided the danger that is short-circuited to a certain extent, further improve the cycle life of lithium-sulfur cell.Accordingly, also can adopt the mixture of polymer-ionic liquid, as the ionic liquid of glycol ester and lithium trifluoromethanesulp,onylimide (LiTFSI) and N-methyl-N-propyl group piperidines.
The mixed organic solvents of catholyte also can be common organic aqueous solution, as dimethoxy-ethane (DME), ethene carbonic ether (EC), diethyl carbonic ether (DEC), propylene carbonate (PC), 1,3-dioxolane (DIOX), various ether, glyme, lactone, sulfone, sulfolane or above mixture.Such as adopting dimethoxy-ethane (DME).Certainly, also can adopt solid polymer electrolyte, as Li
2S-P
2S
5Glass-ceramic, or P (EO)
20Li (CF
3SO
2)
2N-10wt.% γ-LiAlO
2Solid polymer electrolyte can be stablized the discharge performance of sulphur negative electrode.Catholyte can comprise the ionic liquid that contains N-methyl-N butyl piperidine.Adopting this ionic liquid is catholyte, can suppress the dissolving of the polysulfide that sulphur negative electrode in the discharge process forms, and has avoided electric weight in the repeated charge process of battery to descend and the mass loss of active matter, has improved the cycle life of lithium-sulfur cell.
The electrode reaction of lithium-sulfur cell is as follows:
Anodal (negative electrode): S+2e
-→ S
2-(1)
Negative pole (anode): 2Li → 2Li
++ 2e
-(2)
Cell reaction: 2Li
++ S+2e
-→ Li
2S (3)
In discharge process, S is reduced into S2-, and metal Li becomes Li+ simultaneously.Li+ diffuses through the LISICON film from anodolyte then, finally produces Li2S at negative electrode.In the process of charging, Li+ diffuses to anode from negative electrode (Li2S), obtains electronics and becomes lithium metal.Lithium-sulfur cell just can repeated charge like this, and very big energy density and power density are arranged.
Utilize principle of the present utility model, can in any configuration, construct electrochemical cell.With reference to the accompanying drawings 2, according to first specific embodiment of a kind of lithium-sulfur cell of the present utility model.This battery comprises copper collector 1, the lithium carbon anode 2 that links to each other with the copper collector, be coated on the anodolyte 3 of the ionic liquid that contains lithium perchlorate (LiClO4) lithium salts and N-methyl-N-propyl group piperidines of anode periphery, the lithium superionic conductors glass-film 4 that anodolyte and catholyte are separated, and the catholyte 5 that contains the ionic liquid of lithium perchlorate (LiClO4) lithium salts and N-methyl-N-butyl piperidine, the carbon sulphur synthetic particle that is coated on the nanostructure of catholyte periphery is the cathode active material 6 of submicron-scale particulate, and the aluminium collector 7 of carbon nano-tube coating array.Be provided with the O shape ring 8 of insulation between copper anode collector 1 and the aluminium cathode current collector 7.
Compare with first embodiment, among second embodiment of the present utility model, anodolyte contains 1,3-dioxolane (DIOX) organic solution and lithium hexafluoro phosphate (LiPF
6) lithium salts, catholyte contains dimethoxy-ethane (DME) and lithium hexafluoro phosphate (LiPF
6) lithium salts, cathode current collector is the nickel of carbon nano-tube coating array, and the other parts structure is identical.
With reference to accompanying drawing 3, compare with first embodiment simultaneously, among the 3rd embodiment of the present utility model, have lithium compound coating 9 on the carbon sulphur cathode active material, the other parts structure is identical.
With reference to accompanying drawing 4, compare with first embodiment simultaneously, among the 4th embodiment of the present utility model, active material of positive electrode is a lithium metal, and anode surface has LiPON compound protective layer 2a simultaneously, and the other parts structure is identical.
Compare with first embodiment, among the 5th embodiment of the present utility model, anodolyte contains poly (PEGMEMA1100-BMI) polymer gel, and the other parts structure is identical.
Compare with first embodiment, among the 6th embodiment of the present utility model, catholyte contains Li
2S-P
2S
5The glass-ceramic solid polymer, and the other parts structure is identical.
Compare with first embodiment, among the 7th embodiment of the present utility model, cathode current collector is an aluminium, and the other parts structure is identical.
Compare with first embodiment, among the 8th embodiment of the present utility model, barrier film adopts common polyethylene barrier film, and the other parts structure is identical.
Compare with first embodiment, among the 9th embodiment of the present utility model, the ionic liquid that does not comprise N-methyl-N-butyl piperidine in the catholyte, the ionic liquid that does not comprise N-methyl-N-propyl group piperidines in the anodolyte, cathode current collector adopts common aluminium, carbon nano-tube coating array not, and the other parts structure is identical.
Compare with first embodiment, among the of the present utility model ten embodiment, do not comprise the ionic liquid of N-methyl-N-butyl piperidine in the catholyte, do not comprise the ionic liquid of N-methyl-N-propyl group piperidines in the anodolyte, and the other parts structure is identical.
Although only describe and illustrate several embodiment of the present utility model in this specification, but those skilled in the art should predict easily and be used to carry out function described herein/or obtain other means or the structure of structure described herein, and the variation that each is such or revise all is considered as in scope of the present utility model.
Claims (3)
1. a lithium-sulfur cell is characterized in that, described lithium-sulfur cell comprises:
Comprise anode collector and the anode that is selected from the anode active material of lithium metal, lithium alloy and lithium carbon;
Comprise the cathode active material of carbon-sulphur of nanostructure and the negative electrode of cathode current collector;
The electrolyte that comprises electrolyte lithium salt and mixed organic solvents; And
Be located between negative electrode and the anode, electrolyte is divided into the barrier film that anodolyte and catholyte and permission lithium ion pass through.
2. lithium-sulfur cell according to claim 1 is characterized in that: the coating that has lithium compound on the described cathode active material.
3. lithium-sulfur cell according to claim 1 is characterized in that: be coated with carbon nano pipe array on the described cathode current collector.
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|---|---|---|---|
| CN2009201741937U CN201536138U (en) | 2009-08-25 | 2009-08-25 | Lithium-sulfur battery |
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|---|---|---|---|
| CN2009201741937U CN201536138U (en) | 2009-08-25 | 2009-08-25 | Lithium-sulfur battery |
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|---|---|
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ID=42535914
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011023110A1 (en) * | 2009-08-25 | 2011-03-03 | Positec Group Limited | Lithium sulphur battery |
| CN102208599A (en) * | 2011-05-13 | 2011-10-05 | 北京化工大学 | Positive pole piece of lithium-sulphur battery and preparation method thereof |
| CN108539125A (en) * | 2018-04-20 | 2018-09-14 | 桑顿新能源科技有限公司 | A kind of high-energy density lithium sulphur power battery preparation method and battery |
| WO2019019408A1 (en) * | 2017-07-26 | 2019-01-31 | 中能中科（天津）新能源科技有限公司 | Method for batch production of lithium-carbon composite material and device thereof |
-
2009
- 2009-08-25 CN CN2009201741937U patent/CN201536138U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2011023110A1 (en) * | 2009-08-25 | 2011-03-03 | Positec Group Limited | Lithium sulphur battery |
| CN101997145B (en) * | 2009-08-25 | 2013-06-05 | 苏州宝时得电动工具有限公司 | Lithium sulfur battery |
| CN102208599A (en) * | 2011-05-13 | 2011-10-05 | 北京化工大学 | Positive pole piece of lithium-sulphur battery and preparation method thereof |
| WO2019019408A1 (en) * | 2017-07-26 | 2019-01-31 | 中能中科（天津）新能源科技有限公司 | Method for batch production of lithium-carbon composite material and device thereof |
| CN108539125A (en) * | 2018-04-20 | 2018-09-14 | 桑顿新能源科技有限公司 | A kind of high-energy density lithium sulphur power battery preparation method and battery |
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