CN107834074A - A kind of preparation method of lithium-sulfur cell solid state cathode additive and the sulphur negative electrode containing the additive - Google Patents
A kind of preparation method of lithium-sulfur cell solid state cathode additive and the sulphur negative electrode containing the additive Download PDFInfo
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- CN107834074A CN107834074A CN201711065326.2A CN201711065326A CN107834074A CN 107834074 A CN107834074 A CN 107834074A CN 201711065326 A CN201711065326 A CN 201711065326A CN 107834074 A CN107834074 A CN 107834074A
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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
- H01M4/628—Inhibitors, e.g. gassing inhibitors, corrosion inhibitors
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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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
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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
- H01M4/04—Processes of manufacture in general
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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
- H01M4/04—Processes of manufacture in general
- H01M4/0402—Methods of deposition of the material
- H01M4/0404—Methods of deposition of the material by coating on electrode collectors
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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
- H01M4/139—Processes of manufacture
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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
A kind of preparation method the invention discloses lithium-sulfur cell with solid state cathode additive and the sulphur negative electrode containing the additive, the present invention is by by by iodine or solid state cathode additive that the interhalogen compounds containing I forms adds in the preparation process of sulphur composite or in sulphur cathode electrode preparation process, so as to obtain the lithium-sulfur cell negative electrode of the solid state cathode additive of class containing iodine.Due to iodine or the interhalogen compounds containing I has oxidisability, therefore prepared sulphur negative electrode is in lithium-sulfur cell injection process and first circle charge and discharge process, solid state cathode additive can be the same as electrolyte generation chemistry in situ and electrochemical reaction, solid electrolyte membrane is formed in the sulphur negative electrode and lithium anode of lithium-sulfur cell, so as to effectively suppress the shuttle effect of the more sulphions of intermediate product caused by lithium-sulfur cell discharge and recharge, strengthen the cyclical stability of lithium-sulfur cell, and the capacity for improving sulphur negative electrode plays, even if still having capacity performance in the case of being added in the electrolytic solution without lithium salts.
Description
Technical field
The invention belongs to lithium-sulfur cell field, and in particular to a kind of lithium-sulfur cell capacity that improves plays and cycle life
The preparation method of lithium-sulfur cell solid state cathode additive and the sulphur negative electrode containing the additive.
Background technology
Recently as the development of science and technology, requirement of the people to energy storage device energy density steps up, at present lithium
The energy density development of ion battery has basically reached the theoretical limit of its material, generally below 300Wh/kg, further carries
The space risen is limited.In order to adapt to social demand, the exploitation of novel high-energy metric density energy storage system and energy storage material is imperative.
The positive electrode of lithium-sulfur cell system is sulfur materials, and theoretical specific capacity 1675mAh/g, negative material is lithium metal, theoretical ratio
Capacity is 3800mAh/g, both combine the lithium-sulfur cell system of composition theory than energy up to 2600Wh/kg, be current lithium
5~8 times of ion battery, sulfur materials are a kind of common industrial wastes, have that nontoxic, reserves are big, price is low, environment-friendly etc.
Advantage, therefore lithium-sulfur cell system is expected to as the energy storage system of a new generation.
But there is also some technical problems at present to make it be difficult to be commercialized for lithium-sulfur cell system, the extremely low electronics of elemental sulfur
Electrical conductivity hinders the performance of its capacity and the lifting of high rate performance, and its more lithium sulfide of discharge and recharge intermediate product is in conventional electrolysis liquid
In there is very high dissolubility, can diffusive migration produces " shuttles " effect repeatedly between battery plus-negative plate, this " shuttle " is imitated
It should can cause the reduction of lithium-sulfur cell coulombic efficiency, the corrosion on capacity rapid decay and cathode of lithium surface." worn to suppress this
Shuttle " effect, people have done many research work, in terms of majority concentrates on electrolysis additive.(the Journal such as Aurbach
of Electrochemical Society,2009,DOI:10.1149/1.3148721) propose to use nitric acid in the electrolytic solution
Lithium can be formed in situ diaphragm on lithium anode, effectively suppress the shuttle reaction of more lithium sulfides, improve battery coulombic efficiency, but
The diaphragm can gradually use up in the course of dissolution of deposition repeatedly of lithium, less stable.Zhan Lin etc.
(Adv.Funct.Mater.2012.DO1:10.1002/adfm.201200696) propose to use P2S5As electrolysis additive
The Li of high ionic conductivity can be formed in lithium anode surface2PS4Protective layer, and can be with insoluble Li2S and Li2S2React shape
Into the compound of solubilised state, the cyclical stability effect of haveing a certain upgrade to battery；But phosphoric sulfide is to polysulfide
Dissolving may also increase " shuttle " effect of battery.
The content of the invention
In order to solve above mentioned problem existing for prior art, the invention provides a kind of lithium-sulfur cell to be added with solid state cathode
Agent and the preparation method of sulphur negative electrode containing the additive, the present invention pass through by iodine or the interhalogen compounds containing I forms
Solid state cathode additive added in the preparation process of sulphur composite or in sulphur cathode electrode preparation process, so as to be contained
The lithium-sulfur cell negative electrode of iodine class solid state cathode additive, using iodine or the interhalogen compounds containing I oxidisability, effectively
The shuttle effect of the more sulphions of intermediate product caused by lithium-sulfur cell discharge and recharge is inhibited, strengthens the stable circulation of lithium-sulfur cell
Property, and the capacity for improving sulphur negative electrode plays.
The technical solution adopted in the present invention is：
A kind of lithium-sulfur cell solid state cathode additive, the solid state cathode additive is by elemental iodine and/or containing I
Interhalogen compounds composition.
A kind of preparation method of sulphur negative electrode, the sulphur negative electrode is prepared using any one method in following two methods：
Method one comprises the following steps：
S1：The parts by weight of sulphur simple substance 60~95 are taken, the parts by weight of carbon material 5~40, the parts by weight of solid state cathode additive 2~10 are mixed
Conjunction prepares sulphur composite；
S2：By the parts by weight of sulphur composite 80~98, the parts by weight of bonding agent 2~20 and the slurrying solvent 200 in step S1
~400 parts by weight are mixed and made into electrode slurry；The electrode slurry is coated on aluminium collector or nickel set fluid and dried, is obtained
To the sulphur negative electrode containing solid state cathode additive；
Method two comprises the following steps：
P1：The parts by weight of sulphur simple substance 60~95 and the parts by weight of carbon material 5~40 are taken to be mixed with sulphur composite；
P2：The parts by weight of sulphur composite 80~98 in step S1, the parts by weight of bonding agent 2~20, solid state cathode is taken to add
The parts by weight of agent 2~10 and the parts by weight of slurrying solvent 200~400 are mixed and made into electrode slurry；The electrode slurry is coated in aluminium
On collector or nickel set fluid and dry, obtain the sulphur negative electrode containing solid state cathode additive.
Further, the carbon material in the step S1 and P1 be activated carbon, CNT and graphene in one kind or
The a variety of mixing of person.
Further, the sulphur composite in the step S1 and P1 is made up of hot melting process, and the hot melting process is
In closed container, temperature is carried out under conditions of 60 DEG C~300 DEG C.
Further, the sulphur composite in the step S1 and P1 is made by dissolving combination process, and the dissolving is multiple
The organic solvent for closing process selection be non-polar solven, and the solubility of sulphur and iodine is more than 10 in the organic solvent.
Further, the organic solvent selected in the dissolving combination process is carbon disulfide, tetrahydrofuran or four chlorinations
Carbon.
Further, the bonding agent in the step S2 and P2 be polyvinylpyrrolidone, polyoxyethylene, polyacrylonitrile and
Any one or more mixing in polyethylene nitrile.
Further, the slurrying solvent is polar solvent, the iodine in slurrying solvent and the interhalogen compounds containing I
Solubility be more than 2.
Further, the slurrying solvent is any of water, ethanol, acetonitrile, methanol, isopropanol and N-methyl pyrrolidones
It is a kind of.
Further, the hot melting process is carried out at a temperature of 150 DEG C~200 DEG C.
Beneficial effects of the present invention are：
The present invention passes through by iodine or solid state cathode additive that the interhalogen compounds containing I forms is in sulphur composite wood
Added in the preparation process of material or in sulphur cathode electrode preparation process, so as to obtain the lithium sulphur of the solid state cathode additive of class containing iodine electricity
Pool cathode.Due to iodine or the interhalogen compounds containing I has oxidisability, therefore prepared sulphur negative electrode is in lithium-sulfur cell
In injection process and first circle charge and discharge process, with electrolyte original position chemistry and electrochemical reaction can occur for solid state cathode additive,
Solid electrolyte membrane is formed in the sulphur negative electrode and lithium anode of lithium-sulfur cell, in effectively suppressing caused by lithium-sulfur cell discharge and recharge
Between the more sulphions of product shuttle effect, strengthen the cyclical stability of lithium-sulfur cell, and improve sulphur negative electrode capacity play, even if
Still there is capacity performance in the case of being added in the electrolytic solution without lithium salts.
Brief description of the drawings
Fig. 1 is circulation and the efficiency curve of the battery of comparative example 1；
Fig. 2 is circulation and the efficiency curve of the battery of comparative example 2；
Fig. 3 is circulation and the efficiency curve of the battery of embodiments of the invention 1；
Fig. 4 is circulation and the efficiency curve of the battery of embodiments of the invention 2；
Fig. 5 is circulation and the efficiency curve of the battery of embodiments of the invention 3；
In all accompanying drawings, the curve of top represents coulombic efficiency curve, and the curve of lower section represents circulation volume curve.
Embodiment
The invention provides a kind of lithium-sulfur cell solid state cathode additive, the solid state cathode additive is by elemental iodine
And/or the interhalogen compounds composition containing I.
A kind of preparation method of sulphur negative electrode, the sulphur negative electrode is prepared using any one method in following two methods：
Method one comprises the following steps：
S1：The parts by weight of sulphur simple substance 60~95 are taken, the parts by weight of carbon material 5~40, the parts by weight of solid state cathode additive 2~10 are mixed
Conjunction prepares sulphur composite；
S2：By the parts by weight of sulphur composite 80~98, the parts by weight of bonding agent 2~20 and the slurrying solvent 200 in step S1
~400 parts by weight are mixed and made into electrode slurry；The electrode slurry is coated on aluminium collector or nickel set fluid and dried, is obtained
To the sulphur negative electrode containing solid state cathode additive；
Method two comprises the following steps：
P1：The parts by weight of sulphur simple substance 60~95 and the parts by weight of carbon material 5~40 are taken to be mixed with sulphur composite；
P2：The parts by weight of sulphur composite 80~98 in step S1, the parts by weight of bonding agent 2~20, solid state cathode is taken to add
The parts by weight of agent 2~10 and the parts by weight of slurrying solvent 200~400 are mixed and made into electrode slurry；The electrode slurry is coated in aluminium
On collector or nickel set fluid and dry, obtain the sulphur negative electrode containing solid state cathode additive.
Electrode slurry is coated in aluminium collector or nickel set fluid using prior arts such as coating processes in step S2 and P2
Realize.
Carbon material in the step S1 and P1 is that the one or more in activated carbon, CNT and graphene are mixed
Close.
Sulphur composite in the step S1 and P1 is made up of hot melting process, and the hot melting process is in closed container
In, temperature is carried out under conditions of 60 DEG C~300 DEG C.
Sulphur composite in the step S1 and P1 is made by dissolving combination process, and the dissolving combination process is selected
Organic solvent be non-polar solven, the solubility of sulphur and iodine is more than 10 in the organic solvent.
The organic solvent selected in the dissolving combination process is carbon disulfide, tetrahydrofuran or carbon tetrachloride.
Bonding agent in the step S2 and P2 is polyvinylpyrrolidone, polyoxyethylene, polyacrylonitrile and polyethylene nitrile
In any one or more mixing.
The slurrying solvent is polar solvent, and the solubility of the iodine in slurrying solvent and the interhalogen compounds containing I is big
In 2.
The slurrying solvent is any one of water, ethanol, acetonitrile, methanol, isopropanol and N-methyl pyrrolidones.
The hot melting process is carried out at a temperature of 150 DEG C~200 DEG C.
Comparative example 1 is made according to prior art：
The parts by weight of sulphur simple substance 70 are taken, the mixing of the parts by weight of carbon material 30 is placed in 155 degree of heating in sealing container and obtained for 6 hours
To sulphur composite.Take the above-mentioned parts by weight of sulphur composite 95, the parts by weight mixing of binding agent PVDF (gathering inclined tetrafluoroethene) powder 5
And be added in slurrying solvent NMP (N-methyl pyrrolidones) 300 parts by weight, obtain uniform sizing material through ball grinding stirring.Will be above-mentioned
Slurry, which is coated in aluminum foil current collector and is evaporated slurrying solvent, obtains sulphur composite cathode, and the sulphur load capacity of the sulphur composite cathode is
8mg/cm2.Above-mentioned sulphur negative electrode is cut into 2cm2Electrode slice, above-mentioned electrode slice, lithium paper tinsel anode and barrier film are assembled into lamination mould
Intend battery, and add 1M LiTFSI+0.2M LiNO3DME/DOL electrolyte, simulated battery capacity is 16mAh.The battery
As shown in Figure 1, capacity is 16.72mAh under 0.05C for performance test, is 14.48mAh under 0.1C, 50 circle circulation volumes under 0.1C
For 10.87mAh, capability retention 75.09% is average often to enclose capacity attenuation 0.5%, and coulombic efficiency is 97.09% after 50 circles.
Iodine additives are added in electrolyte in comparative example 1 and obtain comparative example 2：
Sulphur composite cathode and lamination simulated battery are prepared by the methods described of comparative example 1, addition electrolyte is 1MLiTFSI+
0.2M LiNO3DME/DOL electrolyte, the iodine additives of 2% mass fraction are added in electrolyte, simulated battery capacity is
16mAh.As shown in Figure 2, capacity is 17.49mAh under 0.05C for the performance test of the battery, is 15.06mAh, 0.1C under 0.1C
Lower 50 circle circulation volume is 11.64mAh, capability retention 77.26%, average often circle capacity attenuation 0.45%, storehouse after 50 circles
Human relations efficiency is 95.18%.
Embodiments of the invention 1：
The parts by weight of sulphur simple substance 70, the parts by weight of solid state cathode additive elemental iodine 2 are taken to be dissolved in 20 parts by weight carbon disulfide,
Add 30 parts by weight conductive black powder and be evaporated carbon disulfide solvent after being well mixed and obtain sulphur composite.Take above-mentioned sulphur
The parts by weight of composite 95, the parts by weight of binding agent PVDF (gathering inclined tetrafluoroethene) powder 5 are mixed and added to slurrying solvent NMP
In (N-methyl pyrrolidones) 300 parts by weight, sulphur composite cathode is prepared according to the method for comparative example 1, the sulphur of the sulphur negative electrode is born
Carry as 8mg/cm2, lamination simulated battery is prepared in the method according to comparative example 1, and add 1M LiTFSI+0.2M LiNO3's
DME/DOL electrolyte, simulated battery capacity are 16mAh.As shown in Figure 3, capacity is under 0.05C for the performance test of the battery
It is 14.46mAh under 16.30mAh, 0.1C, 50 circle circulation volumes be 12.37mAh under 0.1C, and capability retention 85.55% is flat
Capacity attenuation 0.29% is often enclosed, coulombic efficiency is 97.22% after 50 circles.
Embodiments of the invention 2：
The parts by weight of sulphur simple substance 60 and the parts by weight of carbon nanotube powder 40 are taken to mix and be placed in 300 degree of heating in sealing container
Obtain sulphur composite within 2 hours.The above-mentioned parts by weight of sulphur composite 80 are taken, with the parts by weight of binding agent polyoxyethylene powder 10 and admittedly
The parts by weight of state cathode additive IBr (IBr) powder 10 are mixed and added into the parts by weight of slurrying etoh solvent 150 and deionized water
100 parts by weight, carry out ball grinding stirring and obtain uniform sizing material.Above-mentioned slurry is coated in aluminum foil current collector and is evaporated slurrying solvent
Obtain sulphur composite cathode.The sulphur load capacity of the sulphur composite cathode is 7mg/cm2, and lithium sulphur is assembled in the way of comparative example 1 and is folded
Piece simulated battery, addition 1M LiTFSI+0.2M LiNO3DME/DOL electrolyte, simulated battery capacity is 14mAh.The battery
Performance test as shown in Figure 4, capacity is 14.08mAh under 0.05C, is 12.41mAh under 0.1C, under 0.1C 50 circle circulations hold
Measure as 10.85mAh, capability retention 87.43%, average often to enclose capacity attenuation 0.25%, coulombic efficiency is after 50 circles
97.99%.
Embodiments of the invention 3：
The parts by weight of sulphur simple substance 90 and the parts by weight of graphene powder 10 are taken to mix and be placed in 200 degree of heating 3 in sealing container
Hour obtains sulphur composite.The above-mentioned parts by weight of sulphur composite 90 are taken, with the parts by weight of binding agent polyoxyethylene powder 5 and solid-state
The parts by weight of cathode additive ICl (lodine chloride) powder 2, the parts by weight of elemental iodine powder 3 are mixed and added into the weight of slurrying etoh solvent 50
Part and the parts by weight of deionized water 150 are measured, ball grinding stirring is carried out and obtains uniform sizing material.By above-mentioned slurry coated in aluminum foil current collector
And it is evaporated slurrying solvent and obtains sulphur composite cathode.The sulphur load capacity of the sulphur composite cathode is 7mg/cm2, according to comparative example 1
Mode assembles lithium sulphur lamination simulated battery, addition 1M LiTFSI+0.2M LiNO3DME/DOL electrolyte, simulated battery capacity
For 14mAh.As shown in Figure 5, capacity is 13.84mAh under 0.05C for the performance test of the battery, is 12.91mAh under 0.1C,
50 circle circulation volumes are 10.86mAh under 0.1C, and capability retention 84.12% is average often to enclose capacity attenuation 0.32%, 50 circles
Coulombic efficiency is 97.30% afterwards.
The comparing result of three embodiments and comparative example 1 and comparative example 2 of the present invention is as shown in the table：
As can be seen from the above table, the lithium-sulfur cell of the solid state cathode additive of the present invention is employed in circulation conservation rate, list
Lithium-sulfur cell of the prior art is superior in terms of circle average attenuation percentage and coulombic efficiency.Therefore the present invention can strengthen
The cyclical stability of lithium-sulfur cell, and the capacity that can improve sulphur negative electrode plays.
The present invention is not limited to above-mentioned preferred forms, and anyone can show that other are various under the enlightenment of the present invention
The product of form, however, make any change in its shape or structure, it is every that there is skill identical or similar to the present application
Art scheme, is within the scope of the present invention.
Claims (10)
- A kind of 1. lithium-sulfur cell solid state cathode additive, it is characterised in that：The solid state cathode additive by elemental iodine and/or Interhalogen compounds composition containing I.
- A kind of 2. preparation method of the sulphur negative electrode of the solid state cathode additive containing described in claim 1, it is characterised in that：Using Any one method in following two methods prepares the sulphur negative electrode：Method one comprises the following steps：S1：Take the parts by weight of sulphur simple substance 60~95, the parts by weight of carbon material 5~40, the parts by weight of solid state cathode additive 2~10 mixing system Standby sulphur composite；S2：Take the parts by weight of sulphur composite 80~98, the parts by weight of bonding agent 2~20 and the slurrying solvent 200~400 in step S1 Parts by weight are mixed and made into electrode slurry；The electrode slurry is coated on aluminium collector or nickel set fluid and dried, is contained There is the sulphur negative electrode of solid state cathode additive；Method two comprises the following steps：P1：The parts by weight of sulphur simple substance 60~95 and the parts by weight of carbon material 5~40 are taken to be mixed with sulphur composite；P2：Take parts by weight of sulphur composite 80~98 in step S1, the parts by weight of bonding agent 2~20, solid state cathode additive 2~ 10 parts by weight and the parts by weight of slurrying solvent 200~400 are mixed and made into electrode slurry；The electrode slurry is coated in aluminium collector Or in nickel set fluid and dry, obtain the sulphur negative electrode containing solid state cathode additive.
- A kind of 3. preparation method of sulphur negative electrode according to claim 2, it is characterised in that：Carbon in the step S1 and P1 Material is one or more kinds of mixing in activated carbon, CNT and graphene.
- A kind of 4. preparation method of sulphur negative electrode according to claim 2, it is characterised in that：Sulphur in the step S1 and P1 Composite is made up of hot melting process, and the hot melting process is that temperature is under conditions of 60 DEG C~300 DEG C in closed container Carry out.
- A kind of 5. preparation method of sulphur negative electrode according to claim 2, it is characterised in that：Sulphur in the step S1 and P1 Composite is made by dissolving combination process, and the organic solvent that the dissolving combination process is selected is non-polar solven, described The solubility of sulphur and iodine is more than 10 in organic solvent.
- A kind of 6. preparation method of sulphur negative electrode according to claim 5, it is characterised in that：Selected in the dissolving combination process Organic solvent is carbon disulfide, tetrahydrofuran or carbon tetrachloride.
- A kind of 7. preparation method of sulphur negative electrode according to claim 2, it is characterised in that：It is viscous in the step S2 and P2 Agent is connect as any one or more mixing in polyvinylpyrrolidone, polyoxyethylene, polyacrylonitrile and polyethylene nitrile.
- A kind of 8. preparation method of sulphur negative electrode according to claim 2, it is characterised in that：The slurrying solvent is that polarity is molten The solubility of agent, the iodine in slurrying solvent and the interhalogen compounds containing I is more than 2.
- A kind of 9. preparation method of sulphur negative electrode according to claim 8, it is characterised in that：The slurrying solvent is water, second Any one of alcohol, acetonitrile, methanol, isopropanol and N-methyl pyrrolidones.
- A kind of 10. preparation method of sulphur negative electrode according to claim 4, it is characterised in that：The hot melting process is at 150 DEG C Carried out at a temperature of~200 DEG C.
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| CN108365210A (en) * | 2018-04-12 | 2018-08-03 | 桂林电子科技大学 | A kind of activated carbon carbon-sulfur materials and its preparation method and application |
| CN108987803A (en) * | 2018-07-17 | 2018-12-11 | 四川华昆能源有限责任公司 | A kind of lithium an- ode film forming electrolyte and its additive for lithium-sulfur cell |
| CN112234185A (en) * | 2020-10-28 | 2021-01-15 | 珠海冠宇电池股份有限公司 | Positive pole piece and application thereof |
| CN112768768A (en) * | 2021-01-04 | 2021-05-07 | 北京理工大学 | Battery electrolyte containing amine iodide additive and preparation method thereof |
| CN116960349A (en) * | 2023-09-20 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Electrode plate, preparation method thereof, battery and electric equipment |
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| CN108365210A (en) * | 2018-04-12 | 2018-08-03 | 桂林电子科技大学 | A kind of activated carbon carbon-sulfur materials and its preparation method and application |
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| CN116960349A (en) * | 2023-09-20 | 2023-10-27 | 宁德时代新能源科技股份有限公司 | Electrode plate, preparation method thereof, battery and electric equipment |
| CN116960349B (en) * | 2023-09-20 | 2024-03-29 | 宁德时代新能源科技股份有限公司 | Negative plate, preparation method thereof, battery and electric equipment |
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