CN111370703A - Bendable special-shaped battery - Google Patents
Bendable special-shaped battery Download PDFInfo
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- CN111370703A CN111370703A CN202010158430.1A CN202010158430A CN111370703A CN 111370703 A CN111370703 A CN 111370703A CN 202010158430 A CN202010158430 A CN 202010158430A CN 111370703 A CN111370703 A CN 111370703A
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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
- H01M4/64—Carriers or collectors
- H01M4/66—Selection of materials
- H01M4/663—Selection of materials containing carbon or carbonaceous materials as conductive part, e.g. graphite, carbon fibres
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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
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
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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
- H01M10/058—Construction or manufacture
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/411—Organic material
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/44—Fibrous material
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/40—Separators; Membranes; Diaphragms; Spacing elements inside cells
- H01M50/409—Separators, membranes or diaphragms characterised by the material
- H01M50/449—Separators, membranes or diaphragms characterised by the material having a layered structure
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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
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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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
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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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
Abstract
The invention discloses a bendable special-shaped battery, which comprises a diaphragm, positive and negative pole pieces, electrolyte and positive and negative pole lugs, wherein the pole pieces are made of conductive carbon cloth as a current collector, and active substances are arranged on the outer surface of the conductive carbon cloth; the diaphragm is a three-layer structure diaphragm with ion conduction and electronic insulation, the diaphragm is characterized in that a non-woven fabric film is processed to enable carbon nano tubes to be stably dispersed and adsorbed on a non-woven fabric fiber net, then the non-woven fabric film and aniline monomers are subjected to in-situ polymerization reaction, polyaniline particles are deposited on the non-woven fabric fiber net in a mode of gradually decreasing from outside to inside, an isolation layer is formed in the middle, and conducting layers are arranged on two sides of the three-layer structure diaphragm; the positive plate and the negative plate are respectively attached to two sides of the diaphragm through gel electrolyte, the outer package is packaged through a flexible package film, and one end of the positive tab and one end of the negative tab are arranged outside the flexible package film so as to be electrically connected with external equipment. The bendable special-shaped battery has high ionic conductivity and good electrochemical performance.
Description
Technical Field
The invention relates to the field of battery production. More particularly, the present invention relates to a bendable profile battery.
Background
With the birth of wearable electronic products and the increasing market demand thereof, personalized digital products come into endlessly, such as wearable electronic devices like wrist phones, wrist watches, special-shaped bluetooth and wrist pressure gauges. In order to improve the adhesion between the wearable electronic device and the human body and the space utilization rate, the wearable electronic device is usually configured in a special shape or an arc shape, and the demand of special-shaped battery products is increasing. The expectation to dysmorphism class battery is can be according to different space needs, realizes buckling the setting, but current dysmorphism battery is buckling, causes the damage to pole piece and inner structure easily, influences the electrochemical properties of battery.
To above-mentioned problem, prior art discloses the name as pole piece and special-shaped battery, and bulletin number is CN 209071507U, and it is through setting up the cell body on the active layer on the mass flow body surface to reduce the structural integrity of active layer, reduce the internal stress of active layer, avoid the active layer formation buckle pincher trees extrusion mass flow body, cause the mass flow body to damage, the performance of guarantee pole piece, the buckling of the pole piece of being convenient for. The method of arranging the groove body on the active layer on the surface of the current collector in the prior art reduces the amount of active substances, easily exposes the current collector in electrolyte and reduces the electrochemical capacity. The elastic part is filled in the groove body, so that partial active substances cannot be infiltrated, and the exertion of the battery capacity is not facilitated. Therefore, although the prior art can facilitate the bending of the pole piece and does not damage the performance of the pole piece, the reduction of the amount of the active substances and the problem that part of the active substances cannot be infiltrated influence the electrochemical performance of the battery.
The battery comprises an electrolyte, a conductive additive, a current collector and a conductive additive, wherein the conductive additive is arranged in the electrolyte, the conductive additive is provided with ion conduction and electronic insulation properties, the purpose is to improve the current convergence capability to a positive electrode and a negative electrode, but the conductive additive is mixed with the electrolyte and uniformly distributed, the conductive additive is difficult to be distributed, and the conductive additive is provided with the ion conduction and electronic insulation properties, so that the requirement of current convergence to the positive electrode and the negative electrode is difficult to meet. And the prior art has another defect that: the non-woven fabric film is used as the diaphragm of the flexible battery, so that the diffusion rate of ions is slow, the ionic conductivity is low, and the electrochemical performance of the battery is influenced. The conductive additive with the characteristics of ion conduction and electronic insulation is added in the prior art, so that the diaphragm can be promoted to be ion conduction and electronic insulation, and the conductive additive is difficult to mix with electrolyte and uniformly distribute in the inside and the outside of the diaphragm, so that the conductive additive is not beneficial to promoting the ion conduction of the diaphragm, but is not beneficial to increasing the internal resistance of the diaphragm, is not beneficial to ion diffusion and influences the electrochemical performance of a battery.
Disclosure of Invention
An object of the present invention is to provide a bendable profile battery, which addresses the problem of how well the current of the prior art flexible battery converges to the positive and negative electrodes, and how to increase the diffusion rate of ions between the positive and negative plates.
To achieve these objects and other advantages in accordance with the purpose of the invention, there is provided a bendable profile battery including: the battery comprises a battery cell structure consisting of a diaphragm and a pole piece, electrolyte filled in the battery cell structure, and a pole lug electrically connected with the pole piece, wherein the pole piece is made of conductive carbon cloth serving as a current collector, and active substances are arranged on the outer surface of the conductive carbon cloth;
the diaphragm is a three-layer structure diaphragm with ion conduction and electronic insulation, and is obtained by the following method: soaking the non-woven fabric film in acetic acid for softening, soaking in 50-60% sodium chloride solution at 90-100 deg.C for 2-3 hr, washing with deionized water, and vacuum drying to obtain non-woven fabric fiber net; under the vacuum condition, soaking a non-woven fabric fiber net in a carbon nano tube solution which is prepared by deionized water and has the concentration of 0.2-0.3mg/ml, ultrasonically dispersing for 10-20 minutes, standing for 30-40 minutes to ensure that the carbon nano tubes are stably dispersed and adsorbed on the non-woven fabric fiber net, then taking out the non-woven fabric fiber net adsorbed with the carbon nano tubes to perform in-situ polymerization reaction with an aniline monomer, and depositing polyaniline particles on the non-woven fabric fiber net in a mode of gradually decreasing from outside to inside to form a three-layer structure diaphragm with an isolating layer in the middle and conducting layers on two sides;
the electrolyte is gel electrolyte;
the pole piece is positive plate and negative plate respectively, the active material of positive plate is lithium manganate, lithium cobaltate or nickel cobalt lithium manganate, the active material of negative plate is graphite, utmost point ear is positive tab and negative pole ear respectively, positive tab and positive plate electricity are connected, the negative pole ear is connected with the negative plate electricity, positive plate and negative plate laminate respectively in the diaphragm both sides through gel electrolyte, the extranal packing passes through flexible packaging film encapsulation, the one end of positive tab and the one end of negative pole ear are arranged in outside the flexible packaging film to be connected with external equipment electricity.
Preferably, the gel electrolyte is an electrolyte composed of a nonaqueous solvent including a lithium salt and a gelator.
Preferably, the positive plate, the negative plate and the diaphragm are rectangular, the positive plate and the negative plate are the same in shape, the length and width of the diaphragm are slightly larger than those of the positive plate, and the outer edge of the diaphragm is hermetically connected with the flexible packaging film.
Preferably, the flexible packaging film is an aluminum plastic film, the tab is a T-shaped plate, the wide end of the T-shaped plate is tightly connected with one end of the conductive carbon cloth in a pressing manner, and the narrow end of the T-shaped plate extends out of the flexible packaging film.
Preferably, the non-woven fabric film is soaked in acetic acid for 1-2 hours, washed with deionized water for 2-3 times, and dried by vacuum drying.
Preferably, the adsorption capacity of the non-woven fabric fiber net for adsorbing the carbon nano tubes is 3-10 mg/cm2。
Preferably, the in-situ polymerization reaction of the non-woven fabric fiber mesh adsorbed with the carbon nanotubes and the aniline monomer is as follows: pretreating the non-woven fabric fiber net adsorbed with the carbon nano tube in a formic acid solution with the concentration of 30% for 20 minutes, then placing the pretreated non-woven fabric fiber net in a mixed solution of aniline monomer, ammonium persulfate and hydrochloric acid, and reacting for 4 hours in an ice-water bath environment, wherein the concentration of the aniline monomer is 1M, the concentration of the ammonium persulfate is 1M, and the concentration of the hydrochloric acid is 1M.
The invention at least comprises the following beneficial effects:
1. the invention adopts the conductive carbon cloth as the current collectors of the positive plate and the negative plate, so that the positive plate and the negative plate have good flexibility and are convenient to bend, and the current generated by the active substances of the battery can be collected to be beneficial to outputting the current outwards, the invention adopts the steps of soaking and softening the existing non-woven fabric film by acetic acid and soaking the non-woven fabric film by 50-60% sodium chloride solution at 90-100 ℃, so that the carbon nano tube is adsorbed on the non-woven fabric fiber net, carrying out in-situ polymerization reaction with aniline monomer to obtain the three-layer structure diaphragm with the middle part being the isolating layer and the two sides being the conductive layers, respectively attaching the positive plate and the negative plate to the two sides of the bendable diaphragm by the gel electrolyte to obtain the soft and foldable battery, providing a more smooth moving channel for electrons by the three-layer structure diaphragm, improving the diffusion speed of ions between the positive plate and the negative plate, outputting a stable 24V limit voltage test when the thickness of the diaphragm is 30-2S/cm, good electrochemical properties, and an untreated nonwoven film as a separator, the resulting ionic conductivity was 1.29 × 10-3S/cm. Obviously, the three-layer structure diaphragm obtained by processing the non-woven fabric film has the advantages of promoting the diffusion speed of ions between the positive plate and the negative plate, improving the ionic conductivity, and ensuring that the bendable special-shaped battery has flexibility, is convenient to bend into various special-shaped shapes and has good electrochemical performance.
2. The electrolyte adopts gel electrolyte, is beneficial to the attachment of the flexible pole pieces on two sides of the flexible diaphragm and is beneficial to the movement of ions between the positive pole piece and the negative pole piece. The positive plate, the negative plate and the diaphragm are rectangular, so that the special-shaped battery is conveniently packaged into a long strip shape and is conveniently bent or rolled into a cylindrical shape, and the requirements for setting different spaces are met.
3. Set up utmost point ear into the T shaped plate, the one end inseparable pressfitting of wide end and the conductive carbon cloth of T shaped plate is connected, and outside the flexible packaging film was stretched out to the narrow end of T shaped plate, the utmost point ear of being convenient for was fully connected with conductive carbon cloth, reduced the resistance value of link.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic view of the interior of a bendable special-shaped battery according to the present invention;
wherein, the conductive carbon cloth 1; a positive plate 2; a positive tab 3; a diaphragm 4; a negative electrode tab 5; and a negative electrode tab 6.
Detailed Description
The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.
It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
In one embodiment, as shown in fig. 1, a bendable profile battery includes: the battery comprises a battery cell structure consisting of a diaphragm 4 and pole pieces (2 and 6), electrolyte (not shown in figure 1) filled in the battery cell structure, and pole lugs (3 and 5) electrically connected with the pole pieces, wherein the pole pieces are made of conductive carbon cloth 1 serving as a current collector, and active substances are arranged on the outer surfaces of the conductive carbon cloth;
the membrane 4 is a three-layer structure membrane with ion conduction and electronic insulation, and the three-layer structure membrane 4 is obtained by the following method: soaking the non-woven fabric film in acetic acid for softening, soaking in 50% sodium chloride solution at 90 deg.C for 2 hr, washing with deionized water, and vacuum drying to obtain non-woven fabric fiber net; under the vacuum condition, soaking a non-woven fabric fiber net in a carbon nano tube solution which is prepared by deionized water and has the concentration of 0.2mg/ml, ultrasonically dispersing for 10 minutes, standing for 30 minutes to ensure that the carbon nano tubes are stably dispersed and adsorbed on the non-woven fabric fiber net, then taking out the non-woven fabric fiber net adsorbed with the carbon nano tubes to perform in-situ polymerization reaction with an aniline monomer, and depositing polyaniline particles on the non-woven fabric fiber net in a mode of gradually decreasing from outside to inside to form a three-layer structure diaphragm with an isolating layer in the middle and conducting layers on two sides;
the electrolyte can be a gel electrolyte sold in the market or a gel electrolyte composed of a non-aqueous solvent of lithium salt and a gel factor, and the gel electrolyte is beneficial to the attachment of the flexible pole pieces on two sides of the flexible diaphragm and the movement of ions between the positive pole piece and the negative pole piece;
wherein, the pole piece is positive plate 2 and negative pole piece 6 respectively, and the active material of positive plate 2 is lithium manganate, lithium cobaltate or nickel cobalt lithium manganate, and the active material of negative pole piece 6 is graphite, and utmost point ear is positive tab 3 and negative pole ear 5 respectively, and positive tab 3 is connected with 2 electricity on the positive plate, and negative pole ear 5 is connected with 6 electricity on the negative pole piece, and positive plate 2 and negative pole piece 6 laminate respectively in 4 both sides of diaphragm through gel electrolyte, and the extranal packing passes through flexible packaging film encapsulation (for showing in figure 1), and the one end of positive tab 3 and the one end of negative pole ear 5 are arranged in outside the flexible packaging film to be connected with external equipment electricity.
On the basis of the above embodiment, the positive plate 2, the negative plate 6 and the diaphragm 4 are all configured to be rectangular, the positive plate and the negative plate are the same in shape, the length and width of the diaphragm are slightly larger than those of the positive plate, for example, the length × of the positive plate and the width × of the negative plate are 20 × 10 × 1mm, the length × of the diaphragm is 20.5 × 10.5mm, the thickness of the diaphragm is 30um, and the outer edge of the diaphragm is connected with the flexible packaging film in a sealing manner.
On the basis of the embodiment, the flexible packaging film is an aluminum plastic film, the tab is a T-shaped plate, the wide end of the T-shaped plate is tightly connected with one end of the conductive carbon cloth in a pressing mode, and the narrow end of the T-shaped plate extends out of the flexible packaging film.
On the basis of the above examples, the empirical values in the production process were: the time for soaking the non-woven fabric film in acetic acid is 1-2 hours, and the frequency of washing with deionized water is 2-3 times.
Based on the above embodiment, the adsorption amount of the non-woven fabric fiber net for adsorbing the carbon nanotubes is 3-10 mg/cm2。
On the basis of the above embodiment, the in-situ polymerization reaction of the non-woven fabric fiber web adsorbed with the carbon nanotubes and the aniline monomer specifically comprises: pretreating the non-woven fabric fiber net adsorbed with the carbon nano tube in a formic acid solution with the concentration of 30% for 20 minutes, then placing the pretreated non-woven fabric fiber net in a mixed solution of aniline monomer, ammonium persulfate and hydrochloric acid, and reacting for 4 hours in an ice-water bath environment, wherein the concentration of the aniline monomer is 1M, the concentration of the ammonium persulfate is 1M, and the concentration of the hydrochloric acid is 1M.
Example 1
The invention discloses a bendable special-shaped battery, which comprises: the battery comprises a battery cell structure consisting of a diaphragm and a pole piece, electrolyte filled in the battery cell structure, and a pole lug electrically connected with the pole piece, wherein the pole piece is made of conductive carbon cloth serving as a current collector, and active substances are arranged on the outer surface of the conductive carbon cloth;
the diaphragm is a three-layer structure diaphragm with ion conduction and electronic insulation, and the three-layer structure diaphragm is obtained by the following method: soaking a commercially available non-woven fabric film in acetic acid for softening, soaking in 50% sodium chloride solution at 90 ℃ for 2 hours, washing with deionized water, and vacuum drying to obtain a non-woven fabric fiber net; soaking a non-woven fabric fiber net in a carbon nano tube solution with the concentration of 0.2mg/ml prepared by deionized water under the vacuum condition, dispersing for 10 minutes by ultrasonic waves, standing for 30 minutes to ensure that the carbon nano tubes are stably dispersed and adsorbed on the non-woven fabric fiber net, wherein the adsorption quantity of the carbon nano tubes adsorbed on the non-woven fabric fiber net is 3mg/cm2(ii) a Pretreating the non-woven fabric fiber net adsorbed with the carbon nano tubes in a formic acid solution with the concentration of 30% for 20 minutes, then placing the pretreated non-woven fabric fiber net in a mixed solution of aniline monomer, ammonium persulfate and hydrochloric acid, and reacting for 4 hours in an ice-water bath environment to perform in-situ polymerization reaction on the non-woven fabric fiber net adsorbed with the carbon nano tubes and the aniline monomer, wherein the concentration of the aniline monomer is 1M, the concentration of the ammonium persulfate is 1M, and the concentration of the hydrochloric acid is 1M. After in-situ polymerization reaction with aniline monomer, polyaniline particles are deposited on a non-woven fabric fiber net in a mode of gradually decreasing from outside to inside to form a three-layer structure diaphragm with an isolating layer in the middle and conducting layers on two sides;
the electrolyte may be a commercially available gel electrolyte;
the pole pieces are respectively an anode piece and a cathode piece, the active substance of the anode piece is nickel cobalt lithium manganate, the active substance of the cathode piece is graphite, the tabs are respectively an anode tab and a cathode tab, the anode tab is electrically connected with the anode piece, the cathode tab is electrically connected with the cathode piece, the anode piece and the cathode piece are respectively attached to two sides of the diaphragm through gel electrolyte, the outer package is packaged through a flexible package film, one end of the anode tab and one end of the cathode tab are arranged outside the flexible package film so as to be electrically connected with external equipment, the length × width × of the anode piece and the cathode piece is 20 × 10 × 1mm, the length × width of the diaphragm is 20.5 × 10.5.5 mm, and the thickness of the diaphragm is 30 um.
Comparative example 1
The difference between this shaped battery and the bendable shaped battery of example 1 is that the separator used was a commercially available nonwoven fabric film, and the other shape, structure and material were the same as those of the bendable shaped battery of example 1.
Comparative example 2
The difference between the deformed battery and the bendable deformed battery of example 1 is that the separator used was a commercially available nonwoven fabric fiber web, and the amount of carbon nanotubes adsorbed by the nonwoven fabric fiber web was 3mg/cm2Thus obtaining the product. Comparative example 2 the separator was specifically prepared as follows: soaking a commercially available non-woven fabric film in acetic acid for softening, soaking in 50% sodium chloride solution at 90 ℃ for 2 hours, washing with deionized water, and vacuum drying to obtain a non-woven fabric fiber net; soaking a non-woven fabric fiber net in a carbon nano tube solution with the concentration of 0.2mg/ml prepared by deionized water under the vacuum condition, dispersing for 10 minutes by ultrasonic waves, standing for 30 minutes to ensure that the carbon nano tubes are stably dispersed and adsorbed on the non-woven fabric fiber net, wherein the adsorption quantity of the carbon nano tubes adsorbed on the non-woven fabric fiber net is 3mg/cm2. The shaped battery of comparative example 2 was identical in shape structure and material to the bendable shaped battery of example 1, except that the separator used was different from that of example 1.
Comparative example 3
The special-shaped battery is different from the bendable special-shaped battery in the embodiment 1 in that the diaphragm is obtained by placing a commercially available non-woven fabric film in a mixed solution of aniline monomer, ammonium persulfate and hydrochloric acid and soaking for 4 hours in an ice-water bath environment, wherein the concentration of the aniline monomer is 1M, the concentration of the ammonium persulfate is 1M, and the concentration of the hydrochloric acid is 1M. The shaped battery of comparative example 3 was identical in shape structure and material to the bendable shaped battery of example 1, except that the separator used was different from that of example 1.
The ionic conductivity of the sample 1 reaches 3.92 × 10 through the output stable 24V limit voltage test-2S/cm, good electrochemical performance, and ion conductivity of 1.29 × 10 in comparative example 1-3S/cm, ionic conductivity of comparative example 2 was 1.33 × 10-4S/cm, ionic conductivity of comparative example 3 was 5.14 × 10-3S/cm, the three-layer structure diaphragm obtained by processing the non-woven fabric film can promote the diffusion speed of ions between the positive plate and the negative plate, the ionic conductivity is improved, and the bendable special-shaped battery has flexibility and good electrochemical performance.
While embodiments of the invention have been described above, it is not limited to the applications set forth in the description and the embodiments, which are fully applicable in various fields of endeavor to which the invention pertains, and further modifications may readily be made by those skilled in the art, it being understood that the invention is not limited to the details shown and described herein without departing from the general concept defined by the appended claims and their equivalents.
Claims (7)
1. A bendable special-shaped battery comprises: the battery comprises a battery cell structure consisting of a diaphragm and a pole piece, electrolyte filled in the battery cell structure, and a pole lug electrically connected with the pole piece, and is characterized in that the pole piece is made of conductive carbon cloth as a current collector, and active substances are arranged on the outer surface of the conductive carbon cloth;
the diaphragm is a three-layer structure diaphragm with ion conduction and electronic insulation, and is obtained by the following method: soaking the non-woven fabric film in acetic acid for softening, soaking in 50-60% sodium chloride solution at 90-100 deg.C for 2-3 hr, washing with deionized water, and vacuum drying to obtain non-woven fabric fiber net; under the vacuum condition, soaking a non-woven fabric fiber net in a carbon nano tube solution which is prepared by deionized water and has the concentration of 0.2-0.3mg/ml, ultrasonically dispersing for 10-20 minutes, standing for 30-40 minutes to ensure that the carbon nano tubes are stably dispersed and adsorbed on the non-woven fabric fiber net, then taking out the non-woven fabric fiber net adsorbed with the carbon nano tubes to perform in-situ polymerization reaction with an aniline monomer, and depositing polyaniline particles on the non-woven fabric fiber net in a mode of gradually decreasing from outside to inside to form a three-layer structure diaphragm with an isolating layer in the middle and conducting layers on two sides;
the electrolyte is a gel electrolyte;
the pole piece is positive plate and negative plate respectively, the active material of positive plate is lithium manganate, lithium cobaltate or nickel cobalt lithium manganate, the active material of negative plate is graphite, utmost point ear is positive tab and negative pole ear respectively, positive tab and positive plate electricity are connected, the negative pole ear is connected with the negative plate electricity, positive plate and negative plate laminate respectively in the diaphragm both sides through gel electrolyte, the extranal packing passes through flexible packaging film encapsulation, the one end of positive tab and the one end of negative pole ear are arranged in outside the flexible packaging film to be connected with external equipment electricity.
2. The bendable profile battery according to claim 1, wherein the gel electrolyte is an electrolyte consisting of a non-aqueous solvent including a lithium salt and a gel factor.
3. The bendable special-shaped battery according to claim 1, wherein the positive plate, the negative plate and the diaphragm are rectangular, the positive plate and the negative plate are the same in shape, the length and width of the diaphragm are slightly larger than those of the positive plate, and the outer edge of the diaphragm is hermetically connected with the flexible packaging film.
4. The bendable special-shaped battery according to claim 1, wherein the flexible packaging film is an aluminum plastic film, the tab is a T-shaped plate, the wide end of the T-shaped plate is tightly connected with one end of the conductive carbon cloth in a pressing manner, and the narrow end of the T-shaped plate extends out of the flexible packaging film.
5. A bendable profile cell according to any one of claims 1 to 4, wherein the nonwoven fabric film is soaked in acetic acid for 1 to 2 hours and washed with deionized water 2 to 3 times.
6. As claimed inThe bendable special-shaped battery according to claim 5, wherein the adsorption amount of the carbon nanotubes adsorbed by the nonwoven fabric fiber mesh is 3 to 10mg/cm2。
7. The bendable profiled battery as claimed in claim 6, wherein the in-situ polymerization reaction of the non-woven fabric fiber mesh adsorbed with the carbon nanotubes and the aniline monomer is specifically: pretreating the non-woven fabric fiber net adsorbed with the carbon nano tube in a formic acid solution with the concentration of 30% for 20 minutes, then placing the pretreated non-woven fabric fiber net in a mixed solution of aniline monomer, ammonium persulfate and hydrochloric acid, and reacting for 4 hours in an ice-water bath environment, wherein the concentration of the aniline monomer is 1M, the concentration of the ammonium persulfate is 1M, and the concentration of the hydrochloric acid is 1M.
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| CN202010158430.1A CN111370703B (en) | 2020-03-09 | 2020-03-09 | Bendable special-shaped battery |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN111755658A (en) * | 2020-07-06 | 2020-10-09 | 深圳新源柔性科技有限公司 | Novel thin film battery |
| CN111900416A (en) * | 2020-07-31 | 2020-11-06 | 齐鲁工业大学 | Preparation method and application of carbon paper impregnating resin for fuel cell gas diffusion layer |
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| CN114583179A (en) * | 2022-03-04 | 2022-06-03 | 远景动力技术(江苏)有限公司 | Flexible lithium ion battery and manufacturing method thereof |
| CN114583179B (en) * | 2022-03-04 | 2024-04-26 | 远景动力技术(江苏)有限公司 | Flexible lithium ion battery and manufacturing method thereof |
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