CN105552302A - Foldable sulfur cathode composite electrode structure - Google Patents
Foldable sulfur cathode composite electrode structure Download PDFInfo
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- CN105552302A CN105552302A CN201610080726.XA CN201610080726A CN105552302A CN 105552302 A CN105552302 A CN 105552302A CN 201610080726 A CN201610080726 A CN 201610080726A CN 105552302 A CN105552302 A CN 105552302A
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- sulphur
- active material
- electrode structure
- sulfur
- combination electrode
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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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
-
- 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
-
- 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
- H01M4/621—Binders
-
- 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
- H01M4/624—Electric conductive fillers
- H01M4/625—Carbon or graphite
-
- 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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
-
- 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 invention discloses a foldable sulfur cathode composite electrode structure. The foldable sulfur cathode composite electrode structure comprises a flexible foldable three-dimensional carbon fiber cloth base body and cathode active materials; the cathode active materials are distributed in the three-dimensional carbon fiber cloth base body; the cathode active materials comprise sulfur-based active materials, a conductive agent and a binder; the mass content of the sulfur elements in the cathode active materials is not less than 70%. According to the cathode with the composite electrode structure, the problem that the traditional sulfur electrode is poor in conductivity and rapid in capacity fading is greatly improved; meanwhile, the composite electrode is high in sulfur carrying capacity and energy density, is flexible and foldable and can sufficiently satisfy the coiling demands of the electric cores of commodity batteries such as cylinder batteries or flexible package batteries. The foldable sulfur cathode composite electrode structure provided by the invention is easy in getting raw materials and simple in preparation technology, can sufficiently match with the existing lithium ion battery production line and is applicable in industrial mass production.
Description
Technical field
The present invention relates to a kind of collapsible sulphur positive combination electrode structure, belong to field of electrochemical batteries.
Background technology
The fast development of the aspects such as current portable electronic equipment, electric automobile, intelligent grid and space technology, propose more and more higher requirement to the performance of battery, development has high-energy-density, low cost and eco-friendly energy-storage battery and has very important significance.Compared to traditional commercial batteries, as the energy density (150Wh.kg of lithium ion battery
-1), lithium-sulfur cell has high theoretical specific capacity (1673mAh.g
-1) and high theoretical energy density (2510Wh.kg
-1).And positive electrode elemental sulfur aboundresources, cheap, environmental friendliness.So lithium-sulfur cell is the high-energy density secondary battery having development potentiality and application prospect.
But lithium-sulfur cell does not become commercialized always, but be in the state of laboratory research, except having except potential safety hazard because of the use of negative pole simple substance lithium, positive electrode also has following problem: active material elemental sulfur poorly conductive, the many sulphions of intermediate product of discharge process are easily dissolved in electrolyte, and occur " effect of shuttling back and forth ", thus cause irreversible loss and the capacity attenuation of active material.For this reason, how to suppress the diffusion of many sulphions, improve the research emphasis that the distribution of sulphur is sulfur-based positive electrode material.
Up to the present, domestic and international researcher concentrates on the aspect modifying sulphur with material with carbon element mostly to the modification of sulphur positive pole, namely usually adopt the contour conductive carbon material of porous carbon, Graphene, carbon nano-tube and sulphur to form composite material or construct the composite sulfur sill of multi-level structure, to reach the object improving electrode conductivuty and the many sulphion dissolvings of restriction.Although make some progress, the usual preparation method of the sulfenyl composite material described in document is complicated, and operation is many, and cost is high, is unfavorable for industrialized mass.And in order to show high specific discharge capacity in a lot of document, on battery pole piece, the load capacity of sulphur has dropped to 2mg.cm
-2below.By calculating, the sulphur positive pole area ratio capacity of report can be had generally lower than 2mAh.cm
-2, be less than commercial lithium ion battery area ratio capacity (3mAh.cm
-2).Therefore extremely low pole-piece area carries the energy density that sulfur content causes lithium-sulfur cell, on the contrary not as commercial lithium ion battery.
Carbon fiber is a kind of material with carbon element of excellent performance, and application is extensive, and it is used as electrode material and has the advantage such as high conductivity and strong adsorptivity.There is significant difference in mechanics, the electric property of the carbon fiber obtained by different precursor power, the conductive network be built into by carbon fiber has potential application in all many-sides.Carbon cloth is as the spin-off of carbon fiber, also show report at home and abroad for lithium-sulfur cell: [patent 1, a kind of carbon cloth is as the lithium-sulfur cell on barrier layer, (2015) CN104900830A] applicant discloses carbon cloth as the barrier layer between positive pole and barrier film, to adsorb and to stop the loss of many sulphions, belong to battery structure aspect, but the thickness of battery can be strengthened in many increase one deck barrier layers in the battery, reduce the energy density of battery, and barrier layer does not act on for the capacity increasing battery.[document 1, MiaoLX, WangWK, YuanKG, YangYS, WangAB.Chem.Commun., 50:13231 (2014)] researcher is used for lithium-sulphur cell positive electrode by after cotton carbonization, then loads on carbon cloth by sulphur in the mode of melting, and the sulphur on surface is removed in last heat treatment.But adopt melting or sulphur steaming process to carry the complex process such as sulphur, energy consumption is large, pole piece is easily uneven, and cotton after carbonization and the existing carbon cloth for electrode is all more crisp mostly, can only angle and curved, can not bend, can not meet the flexibility requirements that industrial cylindrical battery, flexible-packed battery etc. need the battery core of winding.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, the folding sulphur positive combination electrode structure of a kind of high-energy-density, electrochemical performance is provided, and there is the positive pole of described structure, and the lithium-sulfur cell of this positive pole of coupling.The positive pole with this combined electrode structure substantially improves the fast problem of traditional sulfur electrode poorly conductive, capacity attenuation, and preparation technology is succinct, equipment involved by existing technology for preparing electrode can be used, the collapsible requirement meeting electric core winding of pole piece, is easy to industrially promotion and implementation and production in enormous quantities.
Technical scheme of the present invention is as follows:
A kind of collapsible sulphur positive combination electrode structure, comprise three-dimensional carbon fiber cloth matrix and the positive active material of flexible foldable, described positive active material is distributed in three-dimensional carbon fiber cloth matrix, described positive active material comprises sulfenyl active material, conductive agent and binding agent, and the mass content of element sulphur in positive active material is not less than 70%.
Further, in above-mentioned collapsible sulphur positive combination electrode structure, the count of described three-dimensional carbon fiber cloth is 15 ~ 70ends/10cm, and thickness is 80 ~ 500 μm, and weight is 7 ~ 35mg.cm
-2, planar resistor is 5-30Ohm/cm, and vertical resistor is within 8Ohm, and specific area is 700 ~ 1500m
2/ g.
Further, in above-mentioned collapsible sulphur positive combination electrode structure, described sulfenyl active material is at least one in elemental sulfur, sulphur/carbon complex, sulphur/conductive polymer composite, sulphur/inorganic oxide compound.
Further, in above-mentioned collapsible sulphur positive combination electrode structure, described conductive agent is superP or acetylene black.
Further, in above-mentioned collapsible sulphur positive combination electrode structure, described binding agent is PVDF.
The preparation method of above-mentioned collapsible sulphur positive combination electrode, comprises the steps:
(a) by the conductive carbon fibre cloth deionized water of flexible foldable, ethanol or acetone supersound washing 10 ~ 20min, then dry 8 ~ 12h in 80 DEG C of convection oven;
B binding agent is dissolved in 1-METHYLPYRROLIDONE by (), conductive agent and sulfenyl active material to be added in this solvent and to make it to be scattered in wherein equably, to form active material slurry, regulates rare denseness of slurry;
C () againsts the surface of conductive carbon fibre cloth with coating machine or glass bar, control the speed of coating, even for the active material slurry obtained blade coating is entered the inside of carbon cloth, coated pole piece subsequently 60 DEG C of air blast dries 2 ~ 5h, with twin rollers by vacuum 60 DEG C of dryings again after pole piece compacting, then cut into small pieces according to different battery sizes, obtain collapsible sulphur positive combination electrode.
Above-mentioned collapsible sulphur positive combination electrode has pliability, and bending angle is 0 ° ~ 180 °, can doubling and can not stay folding line, and the active material of bending place can not come off, the requirement of the satisfy the demand cylindrical battery of winding and the battery core of flexible-packed battery.
The present invention substitutes traditional positive pole two dimension current collector aluminum foil with conductive carbon fibre cloth, anode active material slurry is coated on carbon cloth, active material slurry is not only the surface-coated at carbon cloth, be infiltered in the three-dimensional space of crisscross carbon fiber formation simultaneously, obtain the combined electrode structure of sulphur continuous distribution in the network configuration of carbon cloth.After combination electrode is assembled into Battery formation, sulphur is wrapped in the surface of carbon fiber closely, forms sulphur/carbon fibre composite.
Design philosophy of the present invention is:
The present invention is on the basis of traditional lithium-sulfur cell sulphur positive pole, folding conductive carbon fibre cloth is used to substitute traditional two-dimentional current collector aluminum foil, carbon cloth has three-dimensional high connductivity network, carbon fiber network is not only the effect of collector here, itself and sulphur contact area be large, it is tight to combine, having adsorptivity to active material, is a kind of sulphur positive pole with sulphur/carbon fiber combined electrode structure.The present invention introduces the electronics high-speed channel of High-conductivity carbon fiber as long-range, coordinate a small amount of granular conductive carbon black as the use of short distance conductive additive, define continuous print conductive network, make the transmission of electronics in electrode more quick, stable, substantially increase the conductivity of electrode.What have combined electrode structure of the present invention just has high specific capacity and outstanding cyclical stability.This combination electrode achieves high-sulfur load capacity simultaneously, greatly improves the energy density of lithium-sulfur cell; Meanwhile, compound electric pole piece Soft, foldable, meets the winding requirement making the battery battery core such as flexible package and cylinder.
The present invention has following beneficial effect:
(1) the present invention introduces the carbon cloth with three-dimensional conductive network in traditional lithium-sulfur cell, effectively solves the problem of sulfenyl active material poorly conductive.
(2) the present invention propose combined electrode structure in carbon cloth specific area large, in the three-dimensional space that the carbon fiber that sulfur granules is even, continuous print is distributed in intersection is formed, in electrochemical reaction process, carbon fiber plays the effect of adsorbing many sulphions, and make sulphur or lithium sulfide uniform deposition on the surface of carbon fiber, make electrode more even, improve the utilance of sulphur, improve the specific discharge capacity of battery.
(3) the present invention propose combined electrode structure in carbon fiber mutually intersect, stacked, define good space structure, block migration and the diffusion of many sulphions, carbon cloth is both as collector, carbon fiber is wherein cross-linked to form continuous print three-dimensional conductive network, fully contact with sulphur, contact area increases, and substantially improves the conductivity of sulfur electrode; The space structure of its solid inhibits the diffusion of many sulphions simultaneously, has cushioned bulk effect, has improve the cyclical stability of battery.
(4) combined electrode structure of the present invention's proposition, can realize high year sulfur content, the mass surface density of sulphur is 3 ~ 15mg.cm
-2.The capacity with the positive pole unit are of described combined electrode structure reaches as high as 9mAh.cm
-2, thus improve the energy density of battery.
(5) the sulphur positive combination electrode that prepared by the present invention has good pliability, bending angle can realize 0 ° ~ 180 °, can doubling and can not folding line be stayed, the active material of bending place can not come off, and meets the requirement for the cylindrical battery of needs winding and the battery core of flexible-packed battery.
(6) raw material of the collapsible sulphur positive combination electrode of the present invention's proposition are easy to get, and preparation technology is succinct, can mate the production line of existing lithium ion battery completely, be applicable to industrialized mass.
Accompanying drawing explanation
Fig. 1 is the optical photograph of collapsible sulphur positive combination electrode.
Fig. 2 is the SEM figure of collapsible sulphur positive combination electrode.
Fig. 3 is that (a) SEM of collapsible sulphur positive combination electrode be assembled into after circulating battery test schemes, the element sulphur distribution map of (b) electrode sections.
Fig. 4 is the cycle performance figure of collapsible sulphur positive combination electrode and traditional sulfur electrode.
Embodiment
Following examples are intended to be described in further details content of the present invention by reference to the accompanying drawings, but do not limit the scope of the invention.
Embodiment 1:
By carbon cloth deionized water ultrasonic cleaning 10min, then dry 8h in 80 DEG C of convection oven.Sublimed sulfur, superP, PVDF is weighed in the ratio of 7:2:1, first PVDF is dissolved in 1-METHYLPYRROLIDONE, superP, sublimed sulfur is added subsequently in solution, stir with glass bar, drip 1-METHYLPYRROLIDONE again, regulate slurry consistency, the slurry ball mill low speed ball milling 2h will mixed up subsequently, makes it be uniformly dispersed.
Carbon cloth tiling fixed on a glass, even for the slurry obtained blade coating is entered its inside by the surface that against carbon cloth with glass bar, and coated pole piece subsequently 60 DEG C of air blast dries 3h.By pole piece by twin rollers compacting, place it in 24h in the vacuum drying oven of 60 DEG C, obtain collapsible sulphur positive combination electrode.The unit plane stow sulfur content of pole piece is about 4mg.cm
-2.
With sheet-punching machine, combination electrode is cut into the disk that diameter is 14mm, after weighing its weight, then is proceeded in vacuum drying oven and remove excessive moisture.Being assembled in the glove box being full of argon gas of battery is carried out, the button cell of the battery of assembling to be model be CR2025, negative pole 16mm lithium sheet, barrier film Celgard2500.The amount that electrolyte drips is 60 μ L, and the electrolyte adopted is concentration is 1mol.L
-1bis trifluoromethyl sulfonic acid imide li (LiTFSI) and the LiNiO of 2wt%
3being dissolved in volume ratio is in 1, the 3-dioxolane (DOL) of 1:1 and the admixture solvent of glycol dimethyl ether (DME).The new prestige charge-discharge test instrument of the battery of assembling is carried out constant current charge-discharge, and charging/discharging voltage scope is 1.8V ~ 2.6V, first changes into 2 circles with 0.05C small area analysis, uses the cyclical stability of 0.2C test battery subsequently.
Fig. 1 is the optical photograph of the collapsible sulphur positive combination electrode of preparation, can find out the uniformity of combination electrode, and its flexibility, and be can meet doubling completely, and can not leave folding line, the active material of bending place can not come off.As shown in Figure 2, scanning electron microscopic observation shows, active material is uniformly dispersed in three-dimensional conductive structure.As shown in Figure 3, the combination electrode after circulation is combined with carbon fiber closely, and the energy spectrum analysis in pole piece cross section shows further, and element sulphur is continuously in three-dimensional carbon fiber cloth, uniform distribution.
As shown in Figure 4, the battery of collapsible sulphur positive combination electrode assembling is under the small area analysis of 0.05C, and initial discharge specific capacity is up to 1450mAh.g
-1, the discharge capacity of the 3rd circle 0.2C is 980mAh.g subsequently
-1, the capability retention after 100 circles is up to 98%.Show this combination electrode and there is high specific discharge capacity and capability retention.
Embodiment 2:
The process of carbon cloth is identical with embodiment 1.Because carbon cloth can form good conductive network, therefore the amount of conductive black can be turned down, and three dimensions accommodation sulphur not easily comes off, and therefore also can reduce the ratio of binding agent, raw material is more economized, the content of active material is higher.Sublimed sulfur, acetylene black, PVDF is weighed in the ratio of 80:13:7.Sizing mixing of active material is identical with embodiment 1.
Carbon cloth tiling is fixed on a glass, even for the slurry obtained blade coating is entered its inside by the surface that against carbon cloth with glass bar, use glass bar blade coating one deck slurry again at reverse side after 1h is dried in pole piece 60 DEG C of air blast, subsequently 3h is dried in pole piece 60 DEG C of air blast good for double spread.By pole piece by twin rollers compacting, place it in 24h in the vacuum drying oven of 60 DEG C, obtain collapsible sulphur positive combination electrode.The unit plane stow sulfur content of pole piece is about 9mg.cm
-2.
During assembled battery, adopt this combination electrode to be positive pole, copper lithium composite band is negative pole, and the assembling of other batteries is identical with embodiment 1 with test.
Comparative example 1:
Adopt traditional plus plate current-collecting body aluminium foil, in active material, the content of sulphur is identical with embodiment 1 with sizing mixing of active material.
Aluminium foil is cleaned rear subsides on a glass, is that slurry is uniformly coated on aluminium foil by the scraper of 150 μm with gap, and coated pole piece subsequently 60 DEG C of air blast dries 3h.By pole piece by twin rollers compacting, place it in 24h in the vacuum drying oven of 60 DEG C, obtain traditional sulphur positive plate.The unit plane stow sulfur content of pole piece is < 1.5mg.cm
-2.
During assembled battery, adopt this traditional sulfur electrode to be positive pole, lithium sheet is negative pole, and the amount that electrolyte drips is 50 μ L, and the assembling of other batteries is identical with embodiment 1 with test.
As shown in Figure 4, the battery of traditional sulfur electrode assembling is under the small area analysis of 0.05C, and initial discharge specific capacity is less than 900mAh.g
-1, the discharge capacity of the 3rd circle 0.2C is 635mAh.g subsequently
-1, the capability retention after 100 circles only has 67%.
The collapsible sulphur positive combination electrode structure that the present invention proposes can by improving the conductivity of positive pole, the utilance improving sulphur active material improves specific capacity, by the more sulphur of three-dimensional characteristic load, improve the energy density of battery, cyclical stability and the capability retention of battery can also be improved by the adsorptivity of carbon fiber and the good space structure of carbon cloth.
Claims (5)
1. a collapsible sulphur positive combination electrode structure, it is characterized in that, comprise three-dimensional carbon fiber cloth matrix and the positive active material of flexible foldable, described positive active material is distributed in three-dimensional carbon fiber cloth matrix, described positive active material comprises sulfenyl active material, conductive agent and binding agent, and the mass content of element sulphur in positive active material is not less than 70%; The mass surface density that described combination electrode carries sulphur is 3 ~ 15mg.cm
-2.
2. collapsible sulphur positive combination electrode structure according to claim 1, is characterized in that, the count of described three-dimensional carbon fiber cloth is 15 ~ 70ends.10cm
-1, thickness is 80 ~ 500 μm, and weight is 7 ~ 35mg.cm
-2, planar resistor is 5 ~ 30Ohm.cm
-1, vertical resistor is within 8Ohm, and specific area is 700 ~ 1500m
2.g
-1.
3. collapsible sulphur positive combination electrode structure according to claim 1, is characterized in that, described sulfenyl active material is at least one in elemental sulfur, sulphur/carbon complex, sulphur/conductive polymer composite, sulphur/inorganic oxide compound.
4. collapsible sulphur positive combination electrode structure according to claim 1, it is characterized in that, the preparation method of described collapsible sulphur positive combination electrode is simple rubbing method, binding agent is dissolved in 1-METHYLPYRROLIDONE, conductive agent and sulfenyl active material to be added in this solvent and to make it to be scattered in wherein equably, to form active material slurry, regulate rare denseness of slurry, the surface of conductive carbon fibre cloth is against with coating machine or glass bar, control the speed of coating, even for the active material slurry obtained blade coating is entered the inside of carbon cloth, active material enters the inner space of carbon cloth, the sulphur load capacity of pole piece is regulated and controled by rare denseness of slurry and the speed of coating.
5. collapsible sulphur positive combination electrode structure according to claim 1, is characterized in that, described collapsible sulphur positive combination electrode has pliability, and bending angle is 0 ° ~ 180 °, can doubling and can not stay folding line, and the active material of bending place can not come off.
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| CN107369811A (en) * | 2017-08-21 | 2017-11-21 | 柔电（武汉）科技有限公司 | A kind of preparation method of flexible pole piece |
| CN107994251A (en) * | 2017-12-11 | 2018-05-04 | 哈尔滨工业大学 | A kind of double charcoal cloth flexible lithium sulphur batteries and preparation method thereof |
| CN108666576A (en) * | 2018-03-29 | 2018-10-16 | 中山大学 | A kind of crosslinked polymer binder and its lithium sulfur battery anode material of nitrogen functionalization |
| CN109841793A (en) * | 2019-01-25 | 2019-06-04 | 深圳锂硫科技有限公司 | A kind of positive pole plate of lithium-sulfur cell and preparation method thereof |
| CN111816914A (en) * | 2019-04-12 | 2020-10-23 | 康那香企业股份有限公司 | Secondary battery structure capable of winding soft polymer substrate solid electrolyte and preparation method thereof |
| US11309535B2 (en) | 2017-12-18 | 2022-04-19 | The Hong Kong Polytechnic University | Electrodes for batteries |
| WO2023165593A1 (en) * | 2022-03-03 | 2023-09-07 | 比亚迪股份有限公司 | Electrode plate and preparation method therefor, and lithium battery |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107369811A (en) * | 2017-08-21 | 2017-11-21 | 柔电（武汉）科技有限公司 | A kind of preparation method of flexible pole piece |
| CN107994251A (en) * | 2017-12-11 | 2018-05-04 | 哈尔滨工业大学 | A kind of double charcoal cloth flexible lithium sulphur batteries and preparation method thereof |
| CN107994251B (en) * | 2017-12-11 | 2019-10-01 | 哈尔滨工业大学 | A kind of double charcoal cloth flexible lithium sulphur batteries and preparation method thereof |
| US11309535B2 (en) | 2017-12-18 | 2022-04-19 | The Hong Kong Polytechnic University | Electrodes for batteries |
| CN108666576A (en) * | 2018-03-29 | 2018-10-16 | 中山大学 | A kind of crosslinked polymer binder and its lithium sulfur battery anode material of nitrogen functionalization |
| CN109841793A (en) * | 2019-01-25 | 2019-06-04 | 深圳锂硫科技有限公司 | A kind of positive pole plate of lithium-sulfur cell and preparation method thereof |
| CN111816914A (en) * | 2019-04-12 | 2020-10-23 | 康那香企业股份有限公司 | Secondary battery structure capable of winding soft polymer substrate solid electrolyte and preparation method thereof |
| CN111816914B (en) * | 2019-04-12 | 2021-10-29 | 康那香企业股份有限公司 | Secondary battery structure capable of winding soft polymer substrate solid electrolyte and preparation method thereof |
| WO2023165593A1 (en) * | 2022-03-03 | 2023-09-07 | 比亚迪股份有限公司 | Electrode plate and preparation method therefor, and lithium battery |
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