CN109859952A - A kind of battery core and its lithium ion super capacitor, preparation method - Google Patents
A kind of battery core and its lithium ion super capacitor, preparation method Download PDFInfo
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- CN109859952A CN109859952A CN201811496585.5A CN201811496585A CN109859952A CN 109859952 A CN109859952 A CN 109859952A CN 201811496585 A CN201811496585 A CN 201811496585A CN 109859952 A CN109859952 A CN 109859952A
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- pole piece
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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
- Y02E60/13—Energy storage using capacitors
Abstract
The invention discloses a kind of battery core and its lithium ion super capacitors, preparation method, the battery core is by interior electrode, external electrode winds to be formed with common electrode, the interior electrode is opposite with the polarity of the external electrode, the common electrode is between the interior electrode and the external electrode, the first draw pin is connected on the external electrode, the second draw pin is connected on the interior electrode, first electrode part of the common electrode with interior electrode described in face and the second electrode part with external electrode described in face, and it is not be overlapped between the first electrode part and the second electrode part, one and common electrode formation capacitance structure of the interior electrode and external electrode, another forms lithium ion battery structure with the common electrode, the present invention realizes the lithium ion super capacitor of collection lithium battery and supercapacitor advantage, and Modular volume can be effectively reduced while increasing the voltage of supercapacitor.
Description
Technical field
The present invention relates to capacitor technology field, more particularly to a kind of battery core applied to lithium ion super capacitor and
Its lithium ion super capacitor, implementation method.
Background technique
Upstart of the supercapacitor as capacitor family, the favor with its special performance by numerous scholars, it is one
The fine and close energy of kind of power density and energy density between secondary cell and ordinary capacitor is big by its capacity, can be big
Electric current fast charging and discharging and the advantages such as have extended cycle life are expected to become the brilliant next-generation energy storage device of performance efficiency, safety.
For in terms of the order of magnitude of had capacitor, the capacitor that supercapacitor provides can reach farad rank or more, realize
Primary qualitative leap of the capacitance from the microfarad rank of traditional capacitor to farad rank, this is in energy technology history with inner
The revolutionary great undertaking of journey upright stone tablet meaning.With the development of supercapacitor, it is required such as that it is capable of providing every application
The good performance indicator such as high voltage, high power and high reliability, thus electric system, electric vehicle, portable equipment very
To being that the numerous areas such as military affairs are suffered from and are widely applied.
Supercapacitor is exactly the capacitor with electric double layer principle in fact.When applied voltage is added to supercapacitor
When on two pole plates, the positive electrode of pole plate starts to store positive charge, while negative plate starts to store negative electrical charge, in supercapacitor
Under the action of the electric field that charge generates on two-plate, opposite charge just will form on electrolyte and interelectrode interface, with flat
The electric field to weigh inside electrolyte, this positive charge and negative electrical charge be on the contact surface between two different phases, with positive and negative charge it
Between extremely short gap arrangement on opposite position, therefore capacitance is very big.The current most common supercapacitor is then carbon-based
Double electric layers supercapacitor.
However, the shortcoming of itself as lithium ion battery, is individually present in supercapacitor, to limit it
The development of itself.Existing carbon-based double electric layers supercapacitor (EDLC) is although highly-safe, and capacity is small, volume is big, energy is close
Spend low, in some applications, its high-power advantage is difficult to play, it is difficult to adapt to device miniaturization and application request；Lithium from
Although sub- battery energy density is big, safety is low, poor high rate performance is its insoluble problem, so that market exists always
Find it is a kind of integrate big highly-safe, energy density, good rate capability, it is small in size the advantages that novel energy storage apparatus.
On the other hand, current supercapacitor, on improving the super method for holding voltage, typically passing through will be independent
Capacitor is monomer series-connected to be realized at mould group.This mode on the surface from the point of view of, it is really simple and practical, and in fact, the method
The drawbacks of be that the volume of its mould group must be bigger, moreover, because being the mould group that independent monomer is connected in series, also will cause
The waste of the materials such as aluminum hull and cover board, cost and environmental protection from the point of view of, be all it is unfavorable, especially batch production when
It waits, the use of excess stock will cause the raising of cost and the waste of resource.
Summary of the invention
In order to overcome the deficiencies of the above existing technologies, purpose of the present invention is to provide a kind of battery core and its lithium ion are super
Grade capacitor, implementation method, by the way that a supercapacitor and a battery to be transformed into core packet and gather lithium battery
With the lithium ion super capacitor of supercapacitor advantage, and can increase supercapacitor voltage while, effectively subtract
Small modular volume.
In view of the above and other objects, the present invention proposes a kind of battery core, the battery core is by the electricity consumption together of interior electrode, external electrode
Pole winds to be formed, the polarity of the interior electrode and the external electrode on the contrary, the common electrode be located at the interior electrode with it is described
Between external electrode, it is connected with the first draw pin on the external electrode, the second draw pin, the common electrode are connected on the interior electrode
First electrode part with interior electrode described in face and the second electrode part with external electrode described in face, and described
It is not be overlapped between one electrode section and the second electrode part, one and the common electrode of the interior electrode and external electrode
Capacitance structure is formed, another forms lithium ion battery structure with the common electrode.
Preferably, the interior electrode and the common electrode are carbon-based pole piece, the dispatch from foreign news agency extremely lithium material pole piece.
Preferably, the external electrode and the common electrode are carbon-based pole piece, and the interior electrode is lithium material pole piece.
Preferably, the lithium material is lithium titanate.
Preferably, the battery core further includes the first diaphragm and the second diaphragm, and first diaphragm coats the external electrode simultaneously
With the first notch for exposing the external electrode, second diaphragm coats the interior electrode and has for described in exposure
Second notch of interior electrode.
Preferably, the interior electrode, the external electrode and the common electrode are the pole piece of bar shaped
In order to achieve the above objectives, described the present invention also provides a kind of lithium ion super capacitor of application such as aforementioned battery core
Lithium ion super capacitor includes shell and the battery core, and the battery core is seal-installed in the shell containing electrolyte,
And the first draw pin in the battery core is stretched out from the shell with the second draw pin.
In order to achieve the above objectives, the present invention also provides a kind of preparation methods of lithium ion super capacitor, including walk as follows
It is rapid:
Step S1 calculates anode pole piece, common electrode and bears according to the specification of the lithium ion super capacitor of required preparation
The form parameter of pole pole piece；
Step S2 makes corresponding electrode plates according to the form parameter, wherein anode uses carbon-based with common electrode
Pole piece, cathode use lithium material pole piece；
The common electrode is set between anode pole piece and cathode pole piece by step S3, by way of winding, and
Draw pin on anode pole piece and cathode pole piece forms battery core, and carries out baking processing to battery core；
Battery core is packed into shell, and electrolyte is added and seals by step S4, and the lithium ion super capacitor is made
Device.
Preferably, in step S2, anode pole piece and cathode pole piece are rolled to respective thickness according to thickness parameter, then
The slice pole piece of respective width is cut into according to width parameter, further according to length parameter by anode pole piece, cathode pole piece and
Shared pole piece takes corresponding length.
Preferably, in step S3, the battery core of formation is moved to and carries out baking processing in argon atmosphere.
Compared with prior art, a kind of battery core of the present invention and its lithium ion super capacitor, preparation method are by being added altogether
Capacitor arrangement, the lithium material with cathode are formed with electrode, and using the electrode slice of the common electrode and the carbon-based pole piece of anode
Electrode slice forms lithium battery structure, ultimately forms the lithium ion super of the cascaded structure of a capacitor and a battery in core packet
Capacitor, so that the advantages of improved lithium ion super capacitor has not only gathered lithium battery and supercapacitor, and can
While increasing the voltage of supercapacitor, effectively reduce modular volume, solve conventional serial modular volume it is relatively large with
The problem of wasting material.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the battery core applied to lithium ion super capacitor of the present invention；
Fig. 2 is the equivalent circuit diagram for being applied to the battery core of lithium ion super capacitor in the specific embodiment of the invention；
Fig. 3 is a kind of step flow chart of the preparation method of lithium ion super capacitor of the present invention；
Fig. 4 a and Fig. 4 b is respectively three sample charge-discharge tests and cycle life test pair in first embodiment of the invention
Than figure；
Fig. 5 a and Fig. 5 b is respectively three sample charge-discharge tests and cycle life test pair in second embodiment of the invention
Than figure；
Fig. 6 a and Fig. 6 b is respectively three sample charge-discharge tests and cycle life test pair in third embodiment of the invention
Than figure.
Specific embodiment
Below by way of specific specific example and embodiments of the present invention are described with reference to the drawings, those skilled in the art can
Understand further advantage and effect of the invention easily by content disclosed in the present specification.The present invention can also pass through other differences
Specific example implemented or applied, details in this specification can also be based on different perspectives and applications, without departing substantially from
Various modifications and change are carried out under spirit of the invention.
Fig. 1 is a kind of structural schematic diagram of the battery core applied to lithium ion super capacitor of the present invention.As shown in Figure 1, this
A kind of battery core is invented, for being applied to lithium ion super capacitor, is wound by interior electrode 21, external electrode 11 and common electrode 30
It is formed；The interior electrode 21 is opposite with the polarity of the external electrode 11；The common electrode 30 is located at the interior electrode 21 and institute
It states between external electrode 11；The first draw pin 20 is connected on the external electrode 11；The second draw pin 10 is connected on the interior electrode 21；
First electrode part of the common electrode 30 with interior electrode 21 described in face and with external electrode 11 described in face
Two electrode sections, and it is not be overlapped between the first electrode part and the second electrode part.The interior electrode 21 and dispatch from foreign news agency
One in pole 11 forms capacitance structure with the common electrode 30, another forms lithium-ion electric with the common electrode 30
Pool structure,
Wherein, the interior electrode 21 is opposite with the polarity of the external electrode 11 there are two types of situation: the interior electrode 21 is positive
Pole, the external electrode 11 are cathode, and specifically, the interior electrode 21 is carbon-based pole piece, and the external electrode 11 is lithium material pole piece；
The interior electrode 21 is cathode, and the external electrode 11 is anode, and specifically, the external electrode 11 is carbon-based pole piece, the interior electricity
Extremely lithium material pole piece, in the specific embodiment of the invention, the lithium material can be lithium titanate.
In an alternative embodiment, the interior electrode 21, the external electrode 11 and the common electrode 30 are bar shaped
Pole piece.
In an alternative embodiment, the battery core further includes the first diaphragm 12 and the second diaphragm 22；Described first every
Film 12 coats the external electrode 11 and has the first notch for exposing the external electrode 11；Second diaphragm 22 coats institute
It states interior electrode 21 and there is the second notch for exposing the interior electrode 21.Ion can be allowed to pass through using diaphragm, isolation electricity
Son avoids self-discharge phenomenon.
Fig. 2 is the equivalent circuit diagram for being applied to the battery core of lithium ion super capacitor in the specific embodiment of the invention.At this
In embodiment, interior electrode 21 is lithium titanate material cathode, and external electrode 11 is carbon-based anode, and common electrode 30 is carbon-based shared electricity
Pole, as shown in Fig. 2, lithium titanate material cathode 21 and carbon-based common electrode 30 form the cathode and anode of equivalent lithium battery, generally
Its platform voltage is 3.7V, carbon-based common electrode 30 and carbon-based positive 11 composition equivalent capacity, equivalent lithium battery and equivalent capacity
Series connection forms lithium ion super capacitor of the present invention.20 be cathode draw pin, and 10 be positive draw pin, and 21 be negative electrode membrane, and 11 be anode
Diaphragm.
In use, the platform voltage of equivalent lithium battery can reduce the voltage being added in equivalent capacity, thus integral raising
The pressure resistance of lithium ion equivalent capacity.
As it can be seen that the present invention by be applied to lithium ion super capacitor battery core in electrode slice redesign, by adding
Enter a common electrode, and form capacitor arrangement using the electrode slice of the common electrode and the carbon-based pole piece of anode, with cathode
Lithium material electrode slice formed lithium battery structure, ultimately form the lithium of the cascaded structure of a capacitor and a battery in core packet
Ion supercapacitor, so that improved lithium ion super capacitor has not only gathered the excellent of lithium battery and supercapacitor
Point, and modular volume can be effectively reduced while increasing the voltage of supercapacitor, solve conventional serial modular volume phase
The problem of to the larger material with waste.
The principle that the battery core of the present invention is applied to lithium ion super capacitor is as follows: surpassing when applied voltage is added to lithium ion
When on two pole plates of grade capacitor, the positive electrode of pole plate starts to store positive charge, while negative plate starts to store negative electrical charge,
Under the action of the electric field that charge generates on lithium ion super capacitor two-plate, just it will form on electrolyte and interelectrode interface
Opposite charge, is respectively present in common electrode, and with the electric field inside balanced electrolyte, this positive charge and negative electrical charge are at two
On contact surface between different phases, with gap arrangement extremely short between positive and negative charge on opposite position, so that capacitance can be with
It is very big.
In an alternative embodiment of the invention, the present invention also provides a kind of lithium ion super capacitor, the lithium ion supers
Capacitor includes shell and the above-mentioned battery core applied to lithium ion super capacitor；The battery core is seal-installed on containing electrolysis
The first draw pin 4 in the shell of liquid, and in the battery core is stretched out from the shell with the second draw pin 5.
In an alternative embodiment, the shell is aluminum hull.
The lithium ion super capacitor of the present invention, assembling mode to share between each unit (capacitor and battery structure)
Electrolyte, and the mould group is integrated in a monomer, therefore while increasing voltage, can effectively reduce modular volume, is solved
The problem of conventional serial modular volume relatively large material with waste, if cost will be greatlyd save for producing, and to pushing away
The development of dynamic super capacitor industry plays quite positive action diagram 3 as a kind of preparation side of lithium ion super capacitor of the present invention
The step flow chart of method.As shown in figure 3, a kind of preparation method of lithium ion super capacitor of the present invention, includes the following steps:
Step S1 calculates anode pole piece, common electrode and bears according to the specification of the lithium ion super capacitor of required preparation
The form parameter of pole pole piece, the form parameter include length, width and thickness.
Step S2 makes corresponding electrode plates according to the form parameter, wherein anode uses carbon-based with common electrode
Pole piece, cathode use metatitanic acid pole piece.Specifically, anode pole piece and cathode pole piece are rolled by roller press according to thickness parameter
To respective thickness, the slice pole piece of respective width is then cut into using cutting machine according to width parameter, is joined further according to length
Anode pole piece, cathode pole piece and shared pole piece are taken corresponding length by number.
Step S3, common electrode is set between anode pole piece and cathode pole piece, by way of winding, and in anode
Draw pin on pole piece and cathode pole piece forms battery core, and carries out baking processing to battery core.The common electrode has face anode pole
The first electrode part of piece and second electrode part with face cathode pole piece, and first electrode part and second electrode portion
/ be not overlapped, in the specific embodiment of the invention, the battery core of formation, which moves to, carries out baking processing in argon atmosphere.
Battery core is packed into shell, and electrolyte is added and seals by step S4, and the lithium ion super capacitor is made
Device, in the specific embodiment of the invention, the shell can be aluminum hull.
Preferably, further include following steps after step S4:
The lithium ion super capacitor is subjected to subsequent charge and discharge and cycle performance is tested.
The embodiment of three production presented below lithium ion super capacitor
Case one: the lithium ion super capacitor of 5.5V 1F specification is prepared
Using carbon-based pole piece and metatitanic acid pole piece, anode uses carbon-based pole piece with common electrode, and cathode uses metatitanic acid lithium electrode
Piece, by roller press, by anode pole piece roll-in extremely with a thickness of 120 μm, cathode (interior electrode), will using cutting machine with a thickness of 65 μm
It all cuts into the slice pole piece that width is 6mm, and by calculating, it is 17.5mm that cathode, which takes effect length, and common electrode takes 36mm, just
Pole (external electrode) takes 21mm, by way of winding, and the draw pin on interior electrode and external electrode, battery core is formed, argon gas is transferred to
In atmosphere and carry out baking processing, then by battery core be packed into aluminum hull in, be added electrolyte simultaneously seal, carry out subsequent charge and discharge with
Cycle performance test.
3 samples are taken to be tested, shown in result figure 4a and Fig. 4 b.As it can be seen that its voltage is 5.5V, capacity 1F, 20,000 times
After circulation, capacity still has 85% or more.
Case two: the lithium ion super capacitor of 5.5V 50F specification is prepared
Using carbon-based pole piece and metatitanic acid pole piece, anode uses carbon-based pole piece with common electrode, and cathode uses metatitanic acid lithium electrode
Piece, by roller press, by anode pole piece roll-in extremely with a thickness of 230 μm, cathode (interior electrode), will using cutting machine with a thickness of 65 μm
It all cuts into the slice pole piece that width is 30mm, and by calculating, it is 32mm that cathode, which takes effect length, and common electrode takes 65mm, just
Pole (external electrode) takes 36mm, by way of winding, and the draw pin on interior electrode and external electrode, battery core is formed, argon gas is transferred to
In atmosphere and carry out baking processing.Then by battery core be packed into aluminum hull in, be added electrolyte simultaneously seal, carry out subsequent charge and discharge with
Cycle performance test.
3 samples are taken to be tested, shown in result figure 5a and Fig. 5 b.As it can be seen that its voltage is 5.5V, capacity 50F, 20,000
After secondary circulation, capacity still has 88% or more.
Case three: the supercapacitor of 5.5V 100F specification is prepared
Using carbon-based pole piece and metatitanic acid pole piece, anode uses carbon-based pole piece with common electrode, and cathode uses metatitanic acid lithium electrode
Piece, by roller press, by anode pole piece roll-in extremely with a thickness of 240 μm, cathode (interior electrode), will using cutting machine with a thickness of 65 μm
It all cuts into the slice pole piece that width is 30mm, and by calculating, it is 63mm that cathode, which takes effect length, and common electrode takes 127mm, just
Pole (external electrode) takes 67mm, by way of winding, and the draw pin on interior electrode and external electrode, battery core is formed, argon gas is transferred to
In atmosphere and carry out baking processing.Then by battery core be packed into aluminum hull in, be added electrolyte simultaneously seal, carry out subsequent charge and discharge with
Cycle performance test.
3 samples are taken to be tested, as a result as shown in Fig. 6 a and Fig. 6 b.As it can be seen that its voltage is 5.5V, capacity 100F, 2
After ten thousand circulations, capacity still has 89% or more.
In conclusion a kind of battery core of the present invention and its lithium ion super capacitor, preparation method, which pass through, is added common electrode,
And capacitor arrangement, the lithium material electrode slice shape with cathode are formed using the electrode slice of the common electrode and the carbon-based pole piece of anode
At lithium battery structure, the lithium ion super capacitor of the cascaded structure of a capacitor and a battery in core packet is ultimately formed,
So that improved lithium ion super capacitor has not only been gathered the advantages of lithium battery and supercapacitor, and can surpass increasing
While the voltage of grade capacitor, modular volume is effectively reduced, solution conventional serial modular volume is relatively large and wastes material
The problem of.
The above-described embodiments merely illustrate the principles and effects of the present invention, and is not intended to limit the present invention.Any
Without departing from the spirit and scope of the present invention, modifications and changes are made to the above embodiments by field technical staff.Therefore,
The scope of the present invention, should be as listed in the claims.
Claims (10)
1. a kind of battery core, it is characterised in that: the battery core is wound by interior electrode, external electrode and common electrode and formed, the interior electricity
The polarity of pole and the external electrode on the contrary, the common electrode between the interior electrode and the external electrode, the dispatch from foreign news agency
It is connected with the first draw pin on extremely, the second draw pin is connected on the interior electrode, the common electrode has interior electrode described in face
First electrode part and second electrode part with external electrode described in face, and the first electrode part and described the
It is not overlapped between two electrode sections, one and common electrode formation capacitance structure of the interior electrode and external electrode, in addition
One forms lithium ion battery structure with the common electrode.
2. a kind of battery core as described in claim 1, it is characterised in that: the interior electrode is carbon-based pole with the common electrode
Piece, the dispatch from foreign news agency extremely lithium material pole piece.
3. a kind of battery core as described in claim 1, it is characterised in that: the external electrode is carbon-based pole with the common electrode
Piece, the interior electrode are lithium material pole piece.
4. a kind of battery core as claimed in claim 2 or claim 3, it is characterised in that: the lithium material is lithium titanate.
5. a kind of battery core as claimed in claim 4, it is characterised in that: the battery core further includes the first diaphragm and the second diaphragm,
First diaphragm coats the external electrode and has the first notch for exposing the external electrode, the second diaphragm cladding
The interior electrode simultaneously has the second notch for exposing the interior electrode.
6. a kind of battery core as described in claim 1, it is characterised in that: the interior electrode, the external electrode and the shared electricity
The extremely pole piece of bar shaped.
7. a kind of lithium ion super capacitor for applying battery core as described in claim 1, it is characterised in that: the lithium ion super
Capacitor includes shell and the battery core, and the battery core is seal-installed in the shell containing electrolyte, and the battery core
In the first draw pin stretched out from the shell with the second draw pin.
8. a kind of preparation method of lithium ion super capacitor, includes the following steps:
Step S1 calculates anode pole piece, common electrode and cathode pole according to the specification of the lithium ion super capacitor of required preparation
The form parameter of piece；
Step S2 makes corresponding electrode plates according to the form parameter, wherein anode uses carbon-based pole with common electrode
Piece, cathode use lithium material pole piece；
The common electrode is set between anode pole piece and cathode pole piece by step S3, by way of winding, and in anode
Draw pin on pole piece and cathode pole piece forms battery core, and carries out baking processing to battery core；
Battery core is packed into shell, and electrolyte is added and seals by step S4, and the lithium ion super capacitor is made.
9. a kind of preparation method of lithium ion super capacitor as claimed in claim 8, it is characterised in that: in step S2,
Anode pole piece and cathode pole piece are rolled to respective thickness according to thickness parameter, corresponding width is then cut into according to width parameter
Anode pole piece, cathode pole piece and shared pole piece are taken corresponding length further according to length parameter by the slice pole piece of degree.
10. a kind of preparation method of lithium ion super capacitor as claimed in claim 8, it is characterised in that: in step S3,
The battery core of formation is moved to and carries out baking processing in argon atmosphere.
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| CN112448069A (en) * | 2020-11-17 | 2021-03-05 | 河北工业大学 | Metal-air battery and super capacitor integrated device and preparation method thereof |
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