CN107546362A - A kind of electrode with pyroelectric effect and its preparation method and application - Google Patents
A kind of electrode with pyroelectric effect and its preparation method and application Download PDFInfo
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Abstract
The present invention relates to electrochemical field, discloses the electrode with pyroelectric effect, wherein containing pyroelectricity material；Described pyroelectricity material doping in the electrodes, or is coated on electrode surface.On the electric charge transfer that pyroelectricity material discharges in temperature change to electrode, by detecting the change of voltage between positive and negative electrode, the change numerical value of internal temperature of battery is extrapolated, internal temperature of battery change can be monitored.By the application of electrode in preparing battery, it is possible to achieve the Autonomous test of internal temperature change.Device for monitoring temperature and electrode are melted into a whole by the present invention, improve monitoring temperature sensitivity, without setting up temperature measuring equipment in battery, simplify the method for battery thermometric and detection internal temperature of battery change in real time can be realized, improve battery and security.
Description
Technical field
The present invention relates to the electrode of battery, especially with pyroelectric effect, the electricity of detection internal temperature of battery can be realized
Pole and the index method of the electrode.
Background technology
With the development of electronic technology and information technology, a variety of electronic products come into the every field of production and living.
At the same time, the supply unit of electronic equipment has also obtained great popularization and application.But either using extensive plumbic acid electricity
Pond, or the lithium ion battery with broad development space, superheating phenomenon, this battery hair all easily occur in use
Heat, the phenomenon of heating have harmfulness to the normal use of battery.Battery overheats for a long time, the condition of high temperature can cause electricity
Irreversible damage occurs for pond electrode material microstructure, composition of electrolyte, reduces battery capacity, and service life is reduced.More
Under serious situation, battery excessive temperature rise can also cause battery explosion or catching fire.
Particularly inside lithium ion cell is mostly active lithium metal or containing lighium polymer, once the too fast, temperature that heats up
It is too high to cause deflagration phenomenon.It is well known that lithium ion battery has been widely used for the purposes such as computer, communication, amusement
Portable electric appts.Its higher energy density becomes one of first choice of electric automobile or battery of hybrid vehicle.
But electric automobile deflagration event happens occasionally, remarkable tesla's electric automobile is repeatedly on fire since 2013, domestic
Electric automobile, bus, bicycle deflagration event on fire also repeatedly occurs, or even jeopardizes periphery and parks cars, cause heaviness
Loss.
Therefore, the temperature monitoring system in battery is very important part in battery circuit, and this is also to ensure
The measure that battery is normal, safe handling is essential.
But existing cell-temperature monitoring device mainly includes thermocouple, thermal resistance or radiation thermometer etc..
In the prior art, realize that the method for temperature monitoring is mainly implanted directly into thermocouple method, mathematical modulo to inside battery
Type method, outside batteries AC power advocate approach etc., these methods can typically be only used to predict internal temperature of battery.It is implanted directly into heat
Galvanic couple needs to change battery structure, increase battery and extraneous interface quantity, additionally increases battery weight, reduces battery energy density
And reliability；Mathematical model method is by parameters such as the open-circuit voltage of battery, internal resistance, output voltage curve, battery surface temperature
To predict internal temperature of battery, it is impossible to the change directly perceived for providing internal temperature of battery.This causes the monitoring of internal temperature of battery to prolong
Chi Xinggao, it is impossible to the timely and effective internal temperature change for detecting battery.And the temperature of internal temperature of battery, especially electrode becomes
The influence changed to battery life is maximum.The above method actual temp monitor it is real-time it is difficult.
Also have using embedded temperature measuring device, in inside battery design temperature control point, the temperature for detecting inside battery becomes
Change.But this technical scheme that temperature sensor is buried in inside battery make it that battery manufacture cost is high, complicated.And bury
Concealed temperature measuring device takes inside battery space, reduces battery energy density.And this embedded temperature measuring device is mostly that point-like is surveyed
Warm device, it is impossible to directly detect electrode temperature change, can not also monitor battery temperature change on the whole.
Therefore, a kind of monitoring temperature high sensitivity, temperature detection are rapid, are not take up inside battery space and can accurate response
The cell-temperature monitoring technology of electrode temperature change is the key in present battery design.If it can be become by the voltage of electrode
Allelopathic answers internal temperature of battery to change, and realizes internal temperature of battery and the Autonomous test of change, and above-mentioned purpose can be achieved.
The content of the invention
The present invention is intended to provide a kind of electrode with pyroelectric effect, can realize the inspection of internal temperature of battery change
Survey.
Present invention also offers the preparation method of above-mentioned electrode.
Technical scheme is a kind of electrode with pyroelectric effect, to contain pyroelectricity material；Described pyroelectricity material is mixed
It is miscellaneous in the electrodes, or be coated on electrode surface formed pyroelectricity material film.
The pyroelectricity material is fluorine system organic polymer pyroelectricity material, cyanogen system pyroelectricity material, inorganic pyroelectricity material
Material or Organic-inorganic composite pyroelectricity material.
The fluorine system organic polymer pyroelectricity material is β-Kynoar (β-PVDF) or polyvinyladine floride-trifluoro second
Alkene；Cyanogen system pyroelectricity material is vinylidene dinitrile/vinylacetate amorphous copolymer；Inorganic pyroelectricity material is that polysulfide acid three is sweet
Peptide, lead titanates, tantalum lead titanates, lead zirconate titanate, lithium tantalate, lithium niobate, barium strontium titanate or cobalt lead titanates；Organic-inorganic composite heat
It is poly- triglycine sulfate/polyvinylidene fluoride composite material, lead zirconate titanate/polyvinylidene fluoride composite material or metatitanic acid to release electric material
Lead/polyvinylidene fluoride composite material.
When pyroelectricity material adulterates in the electrodes, the preparation method step of above-mentioned electrode includes：Electrode material, heat are released
Electric material and inorganic salts mix, coated on collector；In terms of the total amount of electrode material and pyroelectricity material, pyroelectricity material
Doping is 0.1%~15%, and the dosage of inorganic salts is 0.05%~5%.
Specially：Electrode material, pyroelectricity material and inorganic salts and solvent are mixed, coating is on a current collector；50~
2~24h is dried at 110 DEG C, 5~24h is dried in vacuo under the conditions of 70~130 DEG C, 1pa~101.325KPa；Described is molten
Agent is 1-METHYLPYRROLIDONE (NMP), ethylene carbonate (EC) or dimethyl carbonate (DMC).Preferably, the electrode material
Composition includes electrode active material, binding agent and conductive additive；With electrode material gauge, the content of conductive additive is
2%~15%, the content of binding agent is 0~5%, and electrode active material content is 80%~98%, is mass content above.
Described electrode active material is positive electrode or negative material；Described positive electrode active materials are tertiary cathode material
Expect (NCM, NCA etc.), cobalt acid lithium, LiMn2O4, LiFePO4, phosphoric acid vanadium lithium, organic matter positive electrode (conducting polymer, sulfur-bearing
Compound, compound oxygen radical of nitrogen, oxygen-containing conjugated compound)；Described negative active core-shell material be graphite, silicon and its alloy,
Metal and its alloy or metal oxide.
Preferably, the binding agent is Kynoar, carboxymethyl cellulose, PVAC polyvinylalcohol, polytetrafluoroethylene (PTFE)
PTFE, styrene butadiene rubber sbr, polyacrylate based terpolymers latex, water-soluble acrylic polymers, gelatin or alginic acid
Sodium.
Preferably, the conductive additive is one kind in conductive black, KS-6, CNT or graphene or its mixing
Thing.
Preferably, the inorganic salts are lithium chloride, lithium acetate, lithium perchlorate, lithium hexafluoro phosphate, LiBF4, chlorination
Sodium or sodium acetate.
It is above-mentioned that there is pyroelectric effect electrode when pyroelectricity material, which is coated on electrode surface, forms pyroelectricity material film
Preparation method comprise the following steps：It is film modified in positive electrode or negative electrode surface pyroelectricity material.Preferably, film
Thickness is 0.001~100 thickness, and the micropore for having 10nm~20 and having.Microcellular structure realizes pyroelectricity material film to electricity
The noncontinuity covering on pole surface, movement for electrode and electrolyte intermediate ion, exchange, progress electrode reaction, realize battery
Charging/discharging function.
Preferably, include in electrode face finish pyroelectricity material film, step, by pyroelectricity material or pyroelectricity material
The mixture of material and inorganic salts is dissolved in solvent, and is coated on positive electrode or negative electrode surface, forms pyroelectricity material film.It is excellent
Choosing, solvent is 1-METHYLPYRROLIDONE, ethylene carbonate or dimethyl carbonate.Preferably, inorganic salts are lithium chloride, acetic acid
Lithium, lithium perchlorate, lithium hexafluoro phosphate, LiBF4, sodium chloride or sodium acetate.Preferably, pyroelectricity material and inorganic salts
Amount ratio is 2~10：1, more preferably 2~6：1.Sputtering method, sol-gel process, Metallo-Organic Chemical Vapor can also be used
Sedimentation, pulsed laser deposition form pyroelectricity material film in electrode surface.
Preferably, pyroelectricity material film is β films polyvinylidene difluoride film (β-PVDF), β-PVDF and inorganic salts blend
The compound of film, Kynoar and lead zirconate titanate or lead titanates.β-Kynoar and inorganic salts amount ratio be 2~
10：1, preferably 2~6：1.Described inorganic salts be lithium chloride, lithium acetate, lithium perchlorate, lithium hexafluoro phosphate, LiBF4,
Sodium chloride or sodium acetate.
Described electrode is positive electrode or negative electrode, the active material of positive electrode is tertiary cathode material (NCM, NCA etc.),
(conducting polymer, sulfur-containing compound, nitrogen oxygen are free for cobalt acid lithium, LiMn2O4, LiFePO4, phosphoric acid vanadium lithium, organic matter positive electrode
Based compound, oxygen-containing conjugated compound), the active material of negative electrode is graphite, silicon and its alloy, metal and its alloy or metal
Oxide.
Also include binding agent and conductive additive in positive electrode and negative electrode.Binding agent is preferably Kynoar, carboxylic first
Base cellulose, PVAC polyvinylalcohol, polytetrafluoroethylene PTFE, styrene butadiene rubber sbr, polyacrylate based terpolymers latex, water
Insoluble acrylic polymer, gelatin or sodium alginate.Conductive additive is conductive black, KS-6, CNT or graphene
In one kind or its mixture.With electrode material gauge, the content of conductive additive is 2%~15%, the content of binding agent
For 0~5%, electrode active material content is 80%~98%, is mass content above.
The preferred preparation method of one of electrode is：Electrode active material, conductive additive, binding agent are added in solvent,
And uniformly mixed at room temperature~120 DEG C, coating on a current collector, at 50~110 DEG C dry 2~24h, then at 70~130 DEG C,
5~24h is dried in vacuo under the conditions of 1pa~101.325KPa；.Solvent is 1-METHYLPYRROLIDONE (NMP), ethylene carbonate (EC)
Or dimethyl carbonate (DMC).
In the preferred scheme of the present invention, β hair Kynoar (β-PVDF), its preparation method are adulterated in electrode material
For, by electrode active material, conductive additive and Kynoar (PVDF), inorganic salts and solvent N-methyl pyrilidone or
Ethylene carbonate mixes at room temperature~120 DEG C, and coating is on a current collector；2~24h is dried at 50~110 DEG C, then at 70~
130 DEG C, 5~24h is dried in vacuo under the conditions of 1pa~101.325KPa；.By above-mentioned processing, induction PVDF is changed into β changes
PVDF.Kynoar is 2~10 with inorganic salts amount ratio：1, more preferably 2~6：1；Preferable inorganic salts are lithium chloride.It is poly-
Vinylidene electrode active material.Preferably, the amount ratio of PVDF and solvent is 1g：5~50mL.
In the preferred scheme of the present invention, contain the film of β-Kynoar (β-PVDF) in electrode face finish, method is
(1) PVDF is mixed with inorganic salts and the dosage of 1-METHYLPYRROLIDONE, PVDF and inorganic salts is dissolved at room temperature~110 DEG C
Than for 2~6：1；Or PVDF is dissolved in ethylene carbonate at 90~110 DEG C；(2) mixed liquor is coated in positive electrode or negative
Electrode surface, 2~24h is dried at 50~110 DEG C, it is dried in vacuo 5 under the conditions of 70~130 DEG C, 1pa~101.325KPa~
24h；Preferably, it is dried in vacuo under 1pa~0.05Mpa.By above-mentioned processing in electrode surface induced synthesis β-PVDF.
Preferable inorganic salts are lithium chloride.Preferably, in mixed liquor, PVDF contents are 20~200mg/mL.
The present invention by adulterating pyroelectricity material in the electrodes, or is coated on electrode surface to form pyroelectricity material thin
Film, electrode is set to obtain the characteristic of pyroelectric effect.The electrostatic charge that pyroelectricity material discharges in temperature change is transferred on electrode,
So as to cause battery parameter to change, such as：Open-circuit voltage, internal battery impedance or battery charging and discharging voltage platform.Inspection can be passed through
The change of voltage or other specification, extrapolates the change numerical value of internal temperature of battery, can monitor battery between survey positive and negative electrode
Internal temperature changes.By the application of electrode in preparing battery, this battery can realize the Autonomous test of internal temperature change, draw
The temperature variation of pyroelectricity material, and internal temperature of battery variable quantity is used as, internal temperature of battery variable quantity is plus battery
Initial temperature draws the absolute temperature of inside battery.
By taking button lithium ion battery as an example, 20 DEG C or so of temperature rise can cause about 0.001-1V voltage platform to change, and say
It is bright to extract internal temperature of battery change information by extracting battery stages voltage change.The temperature self-checking brake can conduct
The foundation of power-supply management system heat management, improve the security of battery.
Using this electrode, can solve present battery temperature detection means complexity, temperature detection is inaccurate, feeds back not in time
The problem of.
The present invention sets pyroelectricity material using in electrode surface, or pyroelectricity material is doped to the side in electrode
Case, electrode is set to obtain the performance of pyroelectricity in itself.In the case where not increasing battery volume and structure complexity, possess electrode
Determine the ability of internal temperature of battery change.And the temperature change determined is closer to the temperature inversion near battery electrode,
More can ramp case inside reaction cell so that temperature-measuring results are more accurate and in time.Using this electrode, without increasing in battery
If temperature measuring equipment, the method that simplifies battery thermometric, detection internal temperature of battery change in real time can be realized, battery is improved and uses
Life-span and safety in utilization.
Embodiment
With reference to specific embodiment, the present invention is expanded on further.
Embodiment 1
Weigh 90g tertiary cathode materials (NCM), 4g conductive blacks (conductive additive), 2g KS-6 (isotropic classes
Spherical artificial graphite, conductive additive), 4g PVDF, 1g lithium chloride add beaker in, then add 120mL N- methyl pyrroles
Pyrrolidone (NMP) stirs, and coated on aluminium foil (collector), moves into 100 DEG C of air dry ovens after drying 12h, then put
Enter 120 DEG C of vacuum drying chambers, dried 12 hours under 1pa~101.325KPa.The PVDF in the presence of lithium chloride, solvent NMP
The PVDF of beta crystal is converted into, completes the preparation of based lithium-ion battery positive plate.
Using prepared battery anode slice as the positive pole of battery, lithium piece as the negative pole of battery be together to form button lithium from
Sub- half-cell.By room temperature (25 DEG C), battery is heated up 20 DEG C in 2 seconds, measure the voltage increase 0.4V of battery, temperature drop
After low, voltage then returns to original level.It is constant as binding agent, effect that 0.1~5g sodium alginates can also be added.
As can be seen here, prepared cell positive material possesses the electrochemical properties of positive electrode, can be with lithium piece negative pole
Form cell apparatus, there is provided electric energy, and cell positive material possesses electrical property of heat releasing, when battery temperature raises, in afflux
Electric charge is enriched with body, raises cell voltage.
Or tertiary cathode material is replaced with LiFePO4, cobalt acid lithium, lithium-ion electric made of the positive electrode obtained
Pond, in the case where temperature raises 20 DEG C, voltage (including voltage when standing and during discharge and recharge) improves 0.1~0.3V, and
Temperature recovers previous level after reducing.
Embodiment 2
(1) 90g tertiary cathode materials, 4g conductive blacks, 4g PVDF, 2g conductive additive KS-6 are weighed, is then added
120mL 1-METHYLPYRROLIDONEs stir, coated on aluminium foil.Move into 100 DEG C of air dry ovens after drying 12h, then put
Enter 120 DEG C of vacuum drying chambers, dried 12 hours under 1pa~0.05Mpa vacuum conditions, complete conventional lithium-ion battery positive plate
Preparation.
Using prepared battery anode slice as the positive pole of battery, lithium piece battery is together to form as the negative pole of battery.By
The beginning of (25 DEG C) of room temperature, makes battery heat up 20 DEG C in 2 seconds, the voltage for measuring battery does not change, illustrate common lithium from
PVDF functions only as the effect of binding agent in sub- battery anode slice, it is impossible to brings pyroelectric effect to battery anode slice.
(2) PVDF is dissolved in 100 DEG C of ethylene carbonate, stirred, 70mg/mL solution is configured to, coated in step
Suddenly on the conventional lithium-ion battery positive plate prepared by (1), and 120 DEG C are placed into after drying in 100 DEG C of air dry ovens of immigration
Vacuum drying chamber, dried 12 hours under 1pa~0.05Mpa, using the effect of solvent ethylene carbonate, in common lithium-ion electricity
Pond positive plate spatial induction forms β phase PVDF, obtains β phase PVDF compound electric pole pieces.β phase PVDF coating layer thicknesses can adjust,
Between 0.001~100 μm, and there is the micropore of 10nm~20 μm.
Using above-mentioned combination electrode piece as the positive pole of battery, lithium piece button lithium ion half is together to form for the negative pole of battery
Battery.By room temperature (25 DEG C), battery is heated up 20 DEG C in 2 seconds, measure the voltage rise 0.2V of battery；Temperature reduces
Afterwards, voltage returns to original level immediately.It is resulting after illustrating to be coated with battery anode slice surface and forming β phase PVDF coatings
Compound electric pole piece possesses pyroelectric effect, when battery temperature raises, electric charge is enriched with electrode, raises cell voltage.
Embodiment 3
(1) 90g tertiary cathode materials, 4g conductive blacks, 2g KS-6,4g PVDF are weighed, then adds 120mL N- first
After base pyrrolidones stirs, coated on aluminium foil, move into 100 DEG C of air dry ovens after drying 12h, place into 120 DEG C
Vacuum drying chamber, dried 12 hours under the conditions of 1pa~0.05Mpa, complete the preparation of conventional lithium-ion battery positive plate.
(2) it is together to form battery as the negative pole of battery using prepared battery anode slice as the positive pole of battery, lithium piece
(such as button lithium ion half-cell).By room temperature (25 DEG C), battery is set to heat up 20 DEG C in 2 seconds, the voltage for measuring battery does not have
Change, illustrate that PVDF in conventional lithium-ion battery positive plate functions only as the effect of binding agent, it is impossible to anode
Piece brings pyroelectric effect.
By 4.2:1 mass ratio weighs PVDF, LiCl, is dissolved at 100 DEG C in 1-METHYLPYRROLIDONE, and stirring is equal
It is even to obtain the solution that total concentration is 110mg/ml, and even application is made on fully dry conventional lithium-ion battery positive plate
Standby compound electric pole piece.Then compound electric pole piece is moved into 100 DEG C of air dry ovens after drying, places into 120 DEG C of vacuum drying
Case, dried 12 hours under 1pa~0.05Mpa, obtaining surface has the compound electric pole piece of β phase PVDF coatings.β phase PVDF coatings
Thickness can adjust, and between 0.001~100 μm, and have the micropore of 10nm~20 μm.
Battery is together to form using the prepared negative pole as the positive pole, lithium piece of battery as battery.By room temperature (25 DEG C)
Start, battery is heated up 20 DEG C in 2 seconds, measure the voltage rise 0.4V of battery, after temperature reduces, voltage then returns to original
Come horizontal.
As can be seen here, the addition of lithium chloride can effectively facilitate PVDF and change towards beta crystal, and its pyroelectric property also obtains
Effectively improve.
In embodiment 2 or 3, it is constant as binding agent, effect that 0.1~5g sodium alginates can also be added.
Or tertiary cathode material is replaced with LiFePO4, cobalt acid lithium, battery made of the positive electrode obtained, in temperature
In the case of degree 20 iron of rise, voltage improves 0.1~0.3V, and recovers previous level after temperature reduction.
Embodiment 4
(1) 4.2 are pressed:1 mass ratio weighs PVDF, LiCl, is dissolved in 1-METHYLPYRROLIDONE, stirs at 100 DEG C
The solution for uniformly obtaining that total concentration is 110mg/ml is mixed, and even application is on lithium piece surface.Then move into 100 DEG C of air dry ovens
After interior drying, 120 DEG C of vacuum drying chambers are placed into, are dried 12 hours under 1pa~0.05Mpa vacuum conditions, obtain surface tool
There is the compound electric pole piece of β phase PVDF coatings.β phase PVDF coating layer thicknesses can adjust, and between 0.001~100 μm, and have 10nm
~20 μm of micropore.
(2) using the compound electric pole piece of acquisition as negative pole, the combination electrode obtained with the step of embodiment 2 (1) is positive pole group
Into button lithium ion half-cell.By room temperature (25 DEG C), battery is heated up 20 DEG C in 2 seconds, measure the voltage rise of battery
About 0.2V；After temperature reduces, voltage returns to original level immediately.
Claims (10)
1. a kind of electrode with pyroelectric effect, it is characterised in that contain pyroelectricity material；Described pyroelectricity material doping
In the electrodes, or it is coated on electrode surface.
2. there is the electrode of pyroelectric effect described in claim 1, it is characterised in that the pyroelectricity material is that fluorine system is organic high
Molecule pyroelectricity material, cyanogen system pyroelectricity material, inorganic pyroelectricity material or Organic-inorganic composite pyroelectricity material.
3. there is the electrode of pyroelectric effect described in claim 2, it is characterised in that the fluorine system organic polymer pyroelectricity material
Expect for β-Kynoar or polyvinyladine floride-trifluoro-ethylene；Cyanogen system pyroelectricity material is vinylidene dinitrile/vinylacetate amorphous
State copolymer；Inorganic pyroelectricity material be poly- triglycine sulfate, lead titanates, tantalum lead titanates, lead zirconate titanate, lithium tantalate, lithium niobate,
Barium strontium titanate or cobalt lead titanates；Organic-inorganic composite pyroelectricity material be poly- triglycine sulfate/polyvinylidene fluoride composite material,
Lead zirconate titanate/polyvinylidene fluoride composite material or lead titanates/polyvinylidene fluoride composite material.
4. the preparation method of the electrode with pyroelectric effect of claim 1,2 or 3, it is characterised in that pyroelectricity material
When adulterating in the electrodes, step includes：Electrode material, pyroelectricity material and inorganic salts are mixed, coated on collector；With
The total amount meter of electrode material and pyroelectricity material, pyroelectricity material doping are 0.1%~15%, and the dosage of inorganic salts is
0.05%~5%.
5. the preparation method of the electrode with pyroelectric effect described in claim 4, it is characterised in that electrode material, pyroelectricity
Material and inorganic salts mix with solvent, and coating is on a current collector；At 50~110 DEG C dry 2~24h, then at 70~130 DEG C,
5~24h is dried in vacuo under the conditions of 1pa~101.325KPa；Described solvent is 1-METHYLPYRROLIDONE, ethylene carbonate or carbon
Dimethyl phthalate.
6. the preparation method of the electrode with pyroelectric effect described in claim 4, it is characterised in that the group of the electrode material
Into including electrode active material, binding agent and conductive additive；In terms of electrode material total amount, the content of conductive additive is 2%
~15%, the content of binding agent is 0~5%, and electrode active material content is 80%~98%；
Described electrode active material is positive electrode or negative material；Described positive electrode active materials be tertiary cathode material,
Cobalt acid lithium, LiMn2O4, LiFePO4, phosphoric acid vanadium lithium or organic matter positive electrode；Described negative active core-shell material be graphite, silicon and
Its alloy, metal and its alloy or metal oxide；Described tertiary cathode material is NCM or NCA；Described organic matter positive pole
Material is conducting polymer, sulfur-containing compound, compound oxygen radical of nitrogen or oxygen-containing conjugated compound；
The binding agent is Kynoar, carboxymethyl cellulose, PVAC polyvinylalcohol, polytetrafluoroethylene PTFE, butadiene-styrene rubber
SBR, polyacrylate based terpolymers latex, water-soluble acrylic polymers, gelatin or sodium alginate；
The conductive additive is acetylene black, conductive black, KS-6, CNT or graphene.
7. the preparation method of the electrode of the achievable detection internal temperature of battery change of claim 1 or 4, it is characterised in that
When pyroelectricity material is coated on electrode surface formation pyroelectricity material film, step includes：Used in positive electrode or negative electrode surface
Pyroelectricity material is film modified.
8. the preparation method of the electrode with pyroelectric effect described in claim 7, it is characterised in that described pyroelectricity material
Film is β-PVDF thin film, β-PVDF and inorganic salts blend thin filmses, lead zirconate titanate/polyvinylidene fluoride composite material or metatitanic acid
Lead/polyvinylidene fluoride composite material.
9. the preparation method of the electrode with pyroelectric effect of claim 4 or 8, it is characterised in that inorganic salts are chlorination
Lithium, lithium acetate, lithium perchlorate, lithium hexafluoro phosphate, LiBF4, sodium chloride or sodium acetate, and pyroelectricity material and inorganic salts
Amount ratio be 2~100：1.
10. the electrode with pyroelectric effect described in claim 1,2 or 3 is preparing the battery side with temperature self-checking brake
The application in face.
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| CN108577827A (en) * | 2018-04-10 | 2018-09-28 | 军事科学院军事医学研究院环境医学与作业医学研究所 | A kind of nerve electrode and preparation method thereof |
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