CN109950613A - A kind of sodium-ion battery with superior low-temperature performance - Google Patents
A kind of sodium-ion battery with superior low-temperature performance Download PDFInfo
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- CN109950613A CN109950613A CN201910322182.7A CN201910322182A CN109950613A CN 109950613 A CN109950613 A CN 109950613A CN 201910322182 A CN201910322182 A CN 201910322182A CN 109950613 A CN109950613 A CN 109950613A
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- sodium
- negative electrode
- ion battery
- electrode tab
- positive plate
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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 present invention relates to sodium-ion battery the field of test technology, and disclose a kind of sodium-ion battery with superior low-temperature performance, including positive plate, negative electrode tab, diaphragm, electrolyte and aluminum plastic film, its septation is arranged between positive plate and negative electrode tab, and the positive plate includes positive active material, conductive agent and binder；The negative electrode tab includes negative electrode active material, conductive agent and binder.The sodium-ion battery with superior low-temperature performance realizes the excellent cryogenic property of sodium-ion battery by the positive active material and negative electrode active material of migration velocity and sodium ion diffusion velocity preferably with faster electronics；It is advanced optimized by the conductive agent and binder of positive plate and negative electrode tab, shortens the diffusion length of sodium ion in positive plate and negative electrode tab, and phenomena such as losing powder is less likely to occur material, realizes the excellent cryogenic property of sodium-ion battery.
Description
Technical field
The present invention relates to sodium-ion battery the field of test technology, specially a kind of sodium ion electricity with superior low-temperature performance
Pond.
Background technique
With the development of human society, energy and environment problem becomes increasingly conspicuous and receives significant attention.Traditional fossil energy
Such as coal, petroleum it is non-renewable and pollution environment, although and the new energy such as solar energy, wind energy, tide energy cleaning it is renewable by
Period and weather are affected, and have the characteristics that unstable, discontinuous, uncontrollable, need to develop and establish corresponding rule
Stability of the mould energy storage device to guarantee power generation, power；It is usually also required in power industry using scale energy storage
Technology comes " peak load shifting " to improve the imbalance between supply and demand of electric power, improves the utilization rate of generating equipment.
For other energy storage systems, can the secondary cells of charge and discharge be a kind of extraordinary energy storage medium,
The conversion between electric energy and chemical energy is realized using the invertibity of corresponding redox reaction.In recent years since, battery the energy,
The fields such as information, environment play vital effect, while novel secondary cell memory technology also rises in military aspect
Important strategy function；It is compared with other battery systems, novel sodium-ion battery system includes raw material resources and enriches,
Higher specific energy, production cost is low, has many advantages, such as the similar chemical property with lithium.Therefore, since the 21th century, with
Lithium ion battery influenced to limit its extensive use by lithium resource and production cost, with similar electrochemical properties sodium from
Sub- battery becomes researcher's focus of attention again, and starts to have carried out its reaction mechanism more deep probe into.Currently,
The performance of some sodium ion battery electrode materials, which has been obtained, to be obviously improved, it is more likely that part is replaced Current commercial
Lithium ion battery.
But in some areas, winter low temperature may greatly influence the chemical property of battery；With sodium-ion battery
The continuous propulsion of commercialization process, people are also higher and higher for the attention rate of the application region of sodium-ion battery；It is badly in need of at present
Want a kind of sodium-ion battery with superior low-temperature performance.
Summary of the invention
(1) the technical issues of solving
In view of the deficiencies of the prior art, the present invention provides a kind of sodium-ion battery with superior low-temperature performance, have
The advantages that excellent cryogenic property, solve the problems, such as that winter low temperature can greatly influence the chemical property of battery.
(2) technical solution
The purpose of to realize above-mentioned excellent cryogenic property, the invention provides the following technical scheme: it is a kind of have it is excellent low
The sodium-ion battery of warm nature energy, including positive plate, negative electrode tab, diaphragm, electrolyte and aluminum plastic film, septation are arranged in positive plate
Between negative electrode tab, the positive plate includes positive active material, conductive agent and binder；The negative electrode tab includes negative electrode active
Substance, conductive agent and binder.
Preferably, the positive active material is prussian blue sodium salt material NaxM(CN)6, wherein M be Fe, Co, Ni,
One of Mn or a variety of, and the weight of positive active material and the 80-99% for positive plate total weight.
Preferably, the binder is one of segregation vinyl fluoride and polytetrafluoroethylene (PTFE) or a variety of, and weight of binder
Respectively positive plate and the 0.5-15% of negative electrode tab total weight.
Preferably, the conductive agent is one of carbon fiber, acetylene black, carbon nanotube, graphene and Ketjen black or more
Kind, and the weight of conductive agent is respectively the 0.5-15% of positive plate and negative electrode tab total weight.
Preferably, the negative electrode active material is one of hard carbon and layer expansion graphite or a variety of, and the negative electrode active
The weight of substance and 80-99% for negative electrode tab total weight.
Preferably, the positive plate and negative electrode tab prepare anode sizing agent when, use N-Methyl pyrrolidone, second
One of alcohol, propyl alcohol and isopropanol are a variety of as solvent.
Preferably, the compacted density of the positive plate is 1.5-2.1g/cm3, the compacted density of negative electrode tab is 0.8-
1.4g/cm3。
Preferably, the sodium-ion battery is stacked or soft wrap type structure, and low temperature needed for processing environment is -60-
10℃。
(3) beneficial effect
Compared with prior art, the present invention provides a kind of sodium-ion battery with superior low-temperature performance, have following
The utility model has the advantages that
1, sodium-ion battery with superior low-temperature performance, by preferably with the migration velocity and sodium of faster electronics
The positive active material and negative electrode active material of ion diffusion velocity realize the excellent cryogenic property of sodium-ion battery.
2, the sodium-ion battery with superior low-temperature performance, by the conductive agent and binder of positive plate and negative electrode tab into
Phenomena such as one-step optimization shortens the diffusion length of sodium ion in positive plate and negative electrode tab, and picking is less likely to occur material,
Realize the excellent cryogenic property of sodium-ion battery.
3, the sodium-ion battery with superior low-temperature performance is avoided close in compacting by optimizing compacted density parameter
Spend it is small in the case where, the increase of sodium ion diffusion length is also avoided in the case where compacted density is excessive, hinder sodium ion
Insertion and abjection, realize the optimization of compacted density, realize the excellent cryogenic property of sodium-ion battery.
Specific embodiment
Below in conjunction with the embodiment of the present invention and attached drawing, technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
A kind of sodium-ion battery with superior low-temperature performance, including positive plate, negative electrode tab, diaphragm, electrolyte and plastic-aluminum
Film, septation are arranged between positive plate and negative electrode tab.
Above-mentioned positive plate includes positive active material, conductive agent and binder；Above-mentioned positive active material is Prussian blue
Class sodium salt material NaxM(CN)6, wherein M is one of Fe, Co, Ni, Mn or a variety of, and the weight of positive active material and is
The 80-99% of positive plate total weight, and the compacted density of above-mentioned positive plate is 1.5-2.1g/cm3。
Above-mentioned negative electrode tab includes negative electrode active material, conductive agent and binder；Above-mentioned negative electrode active material is hard carbon and expansion
One of layer graphite is a variety of, and the weight of above-mentioned negative electrode active material and the 80-99% for negative electrode tab total weight；And it bears
The compacted density of pole piece is 0.8-1.4g/cm3。
The present invention by optimization compacted density parameter, avoid in the case where compacted density is too small, sodium ion diffusion away from
From increase, also avoid the insertion and abjection that hinder sodium ion in the case where compacted density is excessive, realize compacted density
Optimization, realize the excellent cryogenic property of sodium-ion battery.
Above-mentioned conductive agent is one of carbon fiber, acetylene black, carbon nanotube, graphene and Ketjen black or a variety of, and is led
The weight of electric agent is respectively the 0.5-15% of positive plate and negative electrode tab total weight.
The present invention is advanced optimized by the conductive agent and binder of positive plate and negative electrode tab, shortens positive plate and cathode
The diffusion length of sodium ion in piece, and phenomena such as losing powder, is less likely to occur material, realizes the excellent low temperature of sodium-ion battery
Performance.
Above-mentioned negative electrode active material is one of hard carbon and layer expansion graphite or a variety of, and the weight of above-mentioned negative electrode active material
Amount and for negative electrode tab total weight 80-99%；Above-mentioned positive plate and negative electrode tab prepare anode sizing agent when, use N- methyl
One of pyrrolidones, ethyl alcohol, propyl alcohol and isopropanol are a variety of as solvent.
Above-mentioned sodium-ion battery is stacked or soft wrap type structure, and low temperature needed for processing environment is 10 DEG C of -60-.
The positive active material that the present invention passes through migration velocity and sodium ion diffusion velocity preferably with faster electronics
And negative electrode active material, realize the excellent cryogenic property of sodium-ion battery.
Embodiment 1:
A kind of sodium-ion battery with superior low-temperature performance, including positive plate, negative electrode tab, diaphragm, electrolyte and plastic-aluminum
Film；
Positive active material used in anode is Na1.72NiMn(CN)6；
Negative electrode active material used in cathode is hard carbon；
The low temperature sodium-ion battery of the present embodiment the preparation method comprises the following steps:
The preparation of anode sizing agent: binder Kynoar is dispersed in N-Methyl pyrrolidone, to segregation vinyl fluoride
Sufficiently after dissolution defoaming, conductive agent acetylene black is added, after being uniformly dispersed, positive active material is added；
The preparation of negative electrode slurry: polyfluortetraethylene of binding element is dispersed in N-Methyl pyrrolidone, to polytetrafluoroethylene (PTFE)
Sufficiently after dissolution defoaming, conductive agent carbon black is added, after being uniformly dispersed, negative electrode active material is added；
Will with spreading mass through being coated and dried, roll process prepares positive plate and negative electrode tab respectively, by gained positive plate,
Negative electrode tab and diaphragm use zigzag lamination process to be prepared into required size battery, by works such as overbaking, fluid injection, chemical conversion, partial volumes
Sequence is fabricated to get the sodium-ion battery with superior low-temperature performance.
Embodiment 2:
A kind of sodium-ion battery with superior low-temperature performance, including positive plate, negative electrode tab, diaphragm, electrolyte and plastic-aluminum
Film；
Positive active material used in anode is Na1.4MnFe(CN)6；
Negative electrode active material used in cathode is layer expansion graphite；
The low temperature sodium-ion battery of the present embodiment the preparation method comprises the following steps:
The preparation of anode sizing agent: polyfluortetraethylene of binding element is dispersed in N-Methyl pyrrolidone, to polytetrafluoroethylene (PTFE)
Sufficiently after dissolution defoaming, conductive agent acetylene black is added, after being uniformly dispersed, positive active material is added；
The preparation of negative electrode slurry: binder segregation vinyl fluoride is dispersed in N-Methyl pyrrolidone, to segregation vinyl fluoride
Sufficiently after dissolution defoaming, conductive agent carbon black is added, after being uniformly dispersed, negative electrode active material is added；
Will with spreading mass through being coated and dried, roll process prepares positive plate and negative electrode tab respectively, by gained positive plate,
Negative electrode tab and diaphragm use zigzag lamination process to be prepared into required size battery, by works such as overbaking, fluid injection, chemical conversion, partial volumes
Sequence is fabricated to get the sodium-ion battery with superior low-temperature performance.
Embodiment 3:
A kind of sodium-ion battery with superior low-temperature performance, including positive plate, negative electrode tab, diaphragm, electrolyte and plastic-aluminum
Film；
Positive active material used in anode is Na2Ni0.4Co0.6Fe(CN)6；
Negative electrode active material used in cathode is layer expansion graphite；
The low temperature sodium-ion battery of the present embodiment the preparation method comprises the following steps:
The preparation of anode sizing agent: binder Kynoar is dispersed in N-Methyl pyrrolidone, to segregation vinyl fluoride
Sufficiently after dissolution defoaming, conductive agent acetylene black is added, after being uniformly dispersed, positive active material is added；
The preparation of negative electrode slurry: polyfluortetraethylene of binding element is dispersed in N-Methyl pyrrolidone, to polytetrafluoroethylene (PTFE)
Sufficiently after dissolution defoaming, conductive agent carbon black is added, after being uniformly dispersed, negative electrode active material is added；
Will with spreading mass through being coated and dried, roll process prepares positive plate and negative electrode tab respectively, by gained positive plate,
Negative electrode tab and diaphragm use zigzag lamination process to be prepared into required size battery, by works such as overbaking, fluid injection, chemical conversion, partial volumes
Sequence is fabricated to get the sodium-ion battery with superior low-temperature performance.
Detection and table are carried out to a kind of sodium-ion battery with superior low-temperature performance that 1-3 of the embodiment of the present invention is prepared
Sign, specific experiment result are as follows:
1, SEM map analysis (being detailed in Figure of description 1-3)
It is characterized using pattern of the scanning electron microscope to the above-mentioned each positive plate prepared, in which:
Fig. 1 is the SEM figure of the positive plate prepared under 500 times in embodiment 1；
Fig. 2 is the SEM figure of the positive plate prepared under 2000 times in the embodiment of the present application 1；
Fig. 3 is the SEM figure of the positive plate prepared under 1000 times in embodiment 2；
From Fig. 1-2 as can be seen that the positive active material particle size for the positive plate that the embodiment of the present application 1 is prepared compared with
It is small, it is completely embedded between particle, it was demonstrated that the material has good conductive property and the path of shorter sodium ion diffusion, therefore
The materials expectations have more excellent cryogenic property.
2, chemical property is analyzed
It is for the various performance parameters for the sodium-ion battery for examining 1-3 of the embodiment of the present invention to prepare, sodium ion is entirely electric
Pond has carried out charge-discharge test.
Sodium-ion battery in embodiment 1 carries out charge-discharge test at 0 DEG C: the charge and discharge three in the case where 0.5C first
It is secondary, discharge capacity is recorded, then constant temperature is respectively put into 0 DEG C of insulating box for 24 hours with the fully charged battery of 0.5C, then in insulating box
Middle carry out electro-chemical test；After the experiment, 2h is shelved into battery removal at normal temperature, estimates battery appearance.
0.5C low temperature discharge of the 1 gained low temperature sodium-ion battery of embodiment under the conditions of 0 DEG C is tested as shown in Fig. 4,
Room temperature 1C charging/1C electric discharge cycle performance is as shown in Figure 5.From discharge performance as can be seen that when 0 degree, sodium ion electricity
Pond has lesser polarization.There is no significant changes after charge and discharge for battery appearance, and material charge and discharge at 0 DEG C, 1C follow
Ring is had excellent performance, and the capacity retention ratio after 35 circles is 96.48%；The chemical property of 1 gained low temperature sodium-ion battery of embodiment
It is excellent.
Sodium-ion battery in embodiment 2 carries out charge-discharge test at 0 DEG C: the charge and discharge three in the case where 0.2C first
It is secondary, discharge capacity is recorded, then constant temperature is respectively put into 0 DEG C of insulating box for 24 hours with the fully charged battery of 0.2C, then in insulating box
Middle carry out electro-chemical test.After the experiment, 2h is shelved into battery removal at normal temperature, estimates battery appearance.
0.2C low temperature discharge of the 2 gained low temperature sodium-ion battery of embodiment under the conditions of 0 DEG C is tested as shown in Fig. 6；From putting
When electrical property can be seen that 0 degree, which has lesser polarization；Battery appearance is not sent out after charge and discharge
Raw significant change.
Sodium-ion battery in embodiment 3 carries out charge-discharge test at 0 DEG C: the charge and discharge three in the case where 0.3C first
It is secondary, discharge capacity is recorded, then constant temperature is respectively put into 0 DEG C of insulating box for 24 hours with the fully charged battery of 0.3C, then in insulating box
Middle carry out electro-chemical test.After the experiment, 2h is shelved into battery removal at normal temperature, estimates battery appearance.
0.3C low temperature discharge of the 3 gained low temperature sodium-ion battery of embodiment under the conditions of 0 DEG C is tested as shown in Fig. 7；From putting
When electrical property can be seen that 0 degree, which has lesser polarization；Battery appearance is not sent out after charge and discharge
Raw significant change.
From Fig. 4-7 as can be seen that sodium-ion battery of the invention has lesser polarization, excellent cyclicity at low temperature
Can, low temperature electrochemical is had excellent performance.
Experimental method described in the various embodiments described above and detection method are unless otherwise specified conventional method；The examination
Agent and material can be commercially available on the market unless otherwise specified.
It although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of variations, modification, replacement can be carried out to these embodiments without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. a kind of sodium-ion battery with superior low-temperature performance, including positive plate, negative electrode tab, diaphragm, electrolyte and aluminum plastic film,
Its septation is arranged between positive plate and negative electrode tab, it is characterised in that: the positive plate includes positive active material, conductive agent
And binder；The negative electrode tab includes negative electrode active material, conductive agent and binder.
2. a kind of sodium-ion battery with superior low-temperature performance according to claim 1, which is characterized in that the anode
Active material is prussian blue sodium salt material NaxM(CN)6, wherein M is one of Fe, Co, Ni, Mn or a variety of, and positive
The weight of active material and 80-99% for positive plate total weight.
3. a kind of sodium-ion battery with superior low-temperature performance according to claim 1, which is characterized in that the bonding
Agent is one of segregation vinyl fluoride and polytetrafluoroethylene (PTFE) or a variety of, and weight of binder is respectively positive plate and negative electrode tab gross weight
The 0.5-15% of amount.
4. a kind of sodium-ion battery with superior low-temperature performance according to claim 1, which is characterized in that the conduction
Agent is one of carbon fiber, acetylene black, carbon nanotube, graphene and Ketjen black or a variety of, and the weight of conductive agent is respectively
The 0.5-15% of positive plate and negative electrode tab total weight.
5. a kind of sodium-ion battery with superior low-temperature performance according to claim 1, which is characterized in that the cathode
Active material be one of hard carbon and layer expansion graphite or a variety of, and the weight of the negative electrode active material and be negative electrode tab gross weight
The 80-99% of amount.
6. a kind of sodium-ion battery with superior low-temperature performance according to claim 1, which is characterized in that the anode
Piece and negative electrode tab prepare anode sizing agent when, using one of N-Methyl pyrrolidone, ethyl alcohol, propyl alcohol and isopropanol or
It is a variety of to be used as solvent.
7. a kind of sodium-ion battery with superior low-temperature performance according to claim 1, which is characterized in that the anode
The compacted density of piece is 1.5-2.1g/cm3, the compacted density of negative electrode tab is 0.8-1.4g/cm3。
8. a kind of sodium-ion battery with superior low-temperature performance according to claim 1, which is characterized in that the sodium from
Sub- battery is stacked or soft wrap type structure, and low temperature needed for processing environment is -60-10 DEG C.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114975958A (en) * | 2022-06-22 | 2022-08-30 | 上海领钫新能源科技有限公司 | Negative electrode material for sodium ion battery, preparation method of negative electrode material, negative plate and sodium ion battery |
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Application publication date: 20190628 |