CN110212156A - Flexible electrode and preparation method and flexible lithium ion battery - Google Patents
Flexible electrode and preparation method and flexible lithium ion battery Download PDFInfo
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- CN110212156A CN110212156A CN201910468736.4A CN201910468736A CN110212156A CN 110212156 A CN110212156 A CN 110212156A CN 201910468736 A CN201910468736 A CN 201910468736A CN 110212156 A CN110212156 A CN 110212156A
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Abstract
The present invention relates to flexible lithium ion battery technical fields, specifically provide a kind of flexible electrode and preparation method thereof and flexible lithium ion battery.The flexible electrode is flexible anode or flexible cathode, the flexible anode and/or flexible cathode include flexible mycoderm, conductive agent and the active material with tridimensional network, wherein, the conductive agent and active material are filled and are incorporated into the tridimensional network of the flexible mycoderm.Flexible electrode of the invention, its active material, conductive agent and flexible mycoderm combine closely to form entity, the flexibility for not only making electrode have mycoderm intrinsic, can also inhibitory activity material and conductive agent fall off, be conducive to improve the stability of electrode when being assembled into lithium ion battery to improve the chemical property of battery, be conducive to the commercial applications for pushing flexible lithium ion battery.
Description
Technical field
The invention belongs to flexible lithium ion battery technical fields, and in particular to a kind of flexible electrode and preparation method thereof and soft
Property lithium ion battery.
Background technique
With the development of wearable device technology, flexible electronic device needed for wearable device etc. is also gradually towards flexibility
Direction is developed, and one of the research hotspot that the lithium ion battery with superhigh-flexibility has become energy storage field how is developed.Such as
Mainly using flexible substrates as load, active material passes through the sides such as coating, suction filtration, extruding for the research of modern flexible lithium ion battery
Formula is incorporated in carrier surface, and these types of mode can reduce the bending of flexible parent metal, and the electrode active material prepared is easily de-
It falls, so obtained properties of product are poor.
Use nano-cellulose for substrate in the prior art, using the method for filters pressing by molybdenum disulfide nano sheet, nanometer
The mixed liquor of cellulose, graphene and carbon nanotube be made it is flexible can self-supporting film, but this method destroys Nanowire
The flexibility and mechanical performance that dimension element has in itself, to influence the overall flexibility performance of flexible battery.
Have again using conductive film as electrode current collecting body, active material is coated on conductive film by way of coating
On, to obtain flexible electrode.But the flexible electrode that this method obtains, surface density is low, and is easy in the process of bending
It falls off, is even scrapped so as to cause the performance dramatic decrease of battery.
Summary of the invention
It is easy to fall off for electrode material existing for current flexible battery, flex capability is poor, surface density is low, bending is easy to draw
The problems such as falling out, the present invention provide a kind of flexible electrode and preparation method thereof.
Further, the present invention also provides the flexible lithium ion batteries comprising flexible electrode of the present invention.
For achieving the above object, technical scheme is as follows:
A kind of flexible electrode, the flexible electrode are flexibility anode or flexible cathode, and the flexible anode and/or flexibility are negative
Pole includes flexible mycoderm, conductive agent and the active material with tridimensional network, wherein the conductive agent and active material are filled out
It fills and is incorporated into the tridimensional network of the flexible mycoderm.
Correspondingly, a kind of preparation method of flexible electrode, comprising the following steps:
There is provided containing black tea, high purity water, glucose culture solution；
Active material, conductive agent and fermented tea strain are added in the culture solution, mixes to being uniformly dispersed, obtains soft
Property electrode growth liquid；
The flexible electrode growth-promoting media is placed in stationary culture under 25~35 DEG C of constant temperature, obtains and contains active material
The mycoderm of material, conductive agent；
It is cleaned, cleaning treatment, and is freeze-dried to the mycoderm, obtain flexible electrode.
Further, a kind of flexible lithium ion battery, including anode and cathode, the flexible electrical just extremely as described above
Pole or the flexible electrode being prepared for the preparation method using flexible electrode as described above；And/or the cathode is such as
The upper flexible electrode or the flexible electrode being prepared for the preparation method using flexible electrode as described above.
Technical effect of the invention are as follows:
Compared with the existing technology, the flexible electrode of the above-mentioned offer of the present invention, active material and conductive agent are filled and are incorporated in
In flexible mycoderm with tridimensional network, active material, conductive agent and flexible mycoderm combine closely to form entity, not only
So that electrode has the intrinsic flexibility of mycoderm, additionally it is possible to which falling off for inhibitory activity material and conductive agent is assembled into lithium ion battery
When be conducive to improve the stability of electrode to improve the chemical property of battery.
The preparation method of flexible electrode of the present invention, raw material is cheap and easy to get, and preparation process is simple, makes in such a way that symbiosis is long
Active material, conductive agent are uniformly filled in the mycoderm of generation, to be conducive to improve active material, conductive agent and mycoderm
Bond strength so that the active material in flexible electrode is not susceptible to fall off, this preparation method is suitable for large-scale commercial applications metaplasia
It produces.
On flexible lithium ion battery of the invention is compared with existing flexible battery, due to anode of the invention and cathode
The flexible electrode that the method for stating obtains, thus lithium ion battery has good flexible characteristic, and active material is not easy from electricity
It is fallen off in extremely, greatly improves the electrochemical energy of lithium ion battery.
Detailed description of the invention
It to describe the technical solutions in the embodiments of the present invention more clearly, below will be to needed in the embodiment
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is the SEM figure for the metatitanic acid lithium electrode that the preparation method of 1~4 flexible electrode of the embodiment of the present invention is prepared；
Fig. 2 is iron phosphate lithium electrode (as anode), black tea prepared by the preparation method of 5 flexible electrode of the embodiment of the present invention
The SEM for the flexible lithium ion battery that bacterium mycoderm (as diaphragm) and metatitanic acid lithium electrode (as cathode) are assembled into schemes；
Fig. 3 be the embodiment of the present invention 1 obtain lithium titanate electrode assembling at lithium ion battery cyclic curve and coulomb
Efficiency；
Fig. 4 is the cyclic curve and coulombic efficiency for the flexible lithium ion battery that the embodiment of the present invention 2 assembles；
Fig. 5 is the cyclic curve and coulombic efficiency for the flexible lithium ion battery that the embodiment of the present invention 3 assembles；
Fig. 6 is the cyclic curve and coulombic efficiency for the flexible lithium ion battery that the embodiment of the present invention 4 assembles；
Fig. 7 is the cyclic curve and coulombic efficiency for the flexible lithium ion battery that the embodiment of the present invention 5 assembles.
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that described herein, specific examples are only used to explain the present invention, not
For limiting the present invention.
The present invention provides a kind of preparation method of flexible electrode.
Specifically, the flexible electrode preparation method the following steps are included:
There is provided containing black tea, high purity water, glucose culture solution；
Active material, conductive agent and fermented tea strain are added in the culture solution, mixes to being uniformly dispersed, obtains soft
Property electrode growth liquid；
The flexible electrode growth-promoting media is placed in stationary culture under 25~35 DEG C of constant temperature, obtains and contains active material
The mycoderm of material, conductive agent；
It is cleaned, cleaning treatment, and is freeze-dried to the mycoderm, obtain flexible electrode.
Detailed explanation is done to above-mentioned preparation method below:
Comprising black tea, high purity water, glucose culture solution in, in black tea containing mycoderm grow required for microelement and
Nitrogen source.And glucose is then used as carbon source, high purity water is as solvent and moisture.
Preferably, in the culture solution, each component is black tea: high purity water: glucose=(2~5): (400 according to mass ratio
~600): (40~60).It such as can be black tea: high purity water: glucose=3:500:50, it is ensured that culture solution concentration was unlikely to
Height is conducive to the flowing of culture solution, convenient for active material and conductive agent is added, while being conducive to the growth of mycoderm.
According to mass ratio, the ingredient proportion of active material, conductive agent and culture solution is (90~95): (5~10): (2212
~5525).The preparation method of flexible electrode of the present invention can prepare flexible anode or prepare flexible cathode, therefore prepare
In the process, the active material and conductive agent of corresponding electrode can be added according to needs are prepared.
Specifically, when the flexible electrode of preparation is flexible anode, the active material of addition is selected from LiFePO4, cobalt
Any one of sour lithium, ternary material, the conductive agent of addition can be graphene, carbon nanotube, conductive black etc..Active material
The mass ratio that feeds intake with conductive agent is (90~95): (5~10).
When the flexible electrode of preparation is flexible cathode, the active material of addition is selected from lithium titanate, natural graphite, silicon
Any one of sill, tin-based material, metal oxide.The conductive agent of addition can be graphene, carbon nanotube, conductive charcoal
It is black etc..The mass ratio that feeds intake of active material and conductive agent is (90~95): (5~10).
It in specific adition process, first can carry out active material, conductive agent to mix ultrasonic disperse with culture solution, obtain
Fermented tea strain is added after dispersion liquid, is also possible to that training is directly added in active material, conductive agent and fermented tea strain simultaneously
In nutrient solution.
The purpose of above-mentioned ultrasonic disperse is mainly so that active material, conductive agent are uniformly dispersed in culture solution, so that obtaining
Flexible electrode active material, the conductive agent obtained is uniformly dispersed.
Fermented tea strain can be added in a manner of fermented tea bacterium solution, in the fermented tea bacterium solution of addition, the quality of fermented tea
Concentration is 5%~30%.Preferably, the additional amount of the fermented tea bacterium solution is the 50%~150% of culture solution.
It during the cultivation process, can be appropriate to add nutrients, such as addition Portugal thereto according to the growing state of mycoderm
Black tea is added in grape sugar, to ensure that mycoderm upgrowth situation is good.And it can according to need, culture vessel is designed to need
Size, to obtain the mycoderm of specific shape and size.
Preferably, the temperature of mycoderm culture is 30 DEG C, active material, conductive agent and nano-cellulose symbiosis at such a temperature
Long status reaches most preferably, and the mycoderm three-dimensional structure of acquisition is evenly distributed, and active material and conductive agent are uniformly distributed and fill out
Charge is full.
Culture terminates, and is impregnated using ultrapure water or boils removal of impurities, while high-temperature sterilization using buck, obtains high-purity
Flexible electrode precursor then passes through freeze-drying, can be obtained flexible electrode.
Preparation method of the invention, raw material is cheap and easy to get, and preparation process is simple, makes active material in such a way that symbiosis is long
Material, conductive agent are uniformly filled in the mycoderm of generation, so that the combination for being conducive to improve active material, conductive agent and mycoderm is strong
Degree, so that the active material in flexible electrode is not susceptible to fall off, this preparation method is suitable for large-scale commercial production.
The flexible electrode that preparation method of the invention obtains, including the flexible mycoderm with tridimensional network, filling is simultaneously
The active material and conductive agent being incorporated into the tridimensional network of the flexible mycoderm.
In the flexible electrode, the mass ratio of active material and conductive agent is (90~95): (5~10).
Specific flexible electrode can be flexible anode, be also possible to flexible cathode.
Since the active material of flexible electrode of the invention, conductive agent and mycoderm bond strength are big, and flex capability
The features such as good, therefore it can be assembled into flexible lithium ion battery, the anode and/or cathode of the flexible lithium ion battery are flexibility
Electrode.
The electrolyte of the flexible lithium ion battery is with ethylene carbonate (EC), dimethyl carbonate (DMC) and methyl
Ethyl ester (EMC) is solvent, with LiPF6For lithium salts.
As the diaphragm of flexible lithium ion battery, conventional diaphragm can be, such as polypropylene (PP) diaphragm, polyethylene (PE)
Diaphragm can also be the fermented tea mycoderm being prepared using the preparation method of the above-mentioned flexible electrode of the present invention, in preparation process
In, active material and conductive agent are added not into culture solution, therefore the fermented tea mycoderm is free of conductive agent and active material.
The flexible lithium ion battery being assembled into not only has good flexibility, but also active material is not easy to occur from electrode
It falls off, greatlys improve the chemical property of lithium ion battery.
More effectively to illustrate technical solution of the present invention, technology of the invention is illustrated below by multiple specific embodiments
Scheme.
Embodiment 1
A kind of preparation method of flexible electrode, the active material of the flexible electrode are lithium titanate, and preparation method includes such as
Lower step:
(a) takes 1.2g black tea, 200g ultrapure water, 20g glucose, and sterilization treatment after mixing is configured to 221.2g culture
Liquid.
(b) puts into 9.5g lithium titanate and 0.5g carbon nanotube in above-mentioned culture solution, and Ultrasonic Pulverization is dispersed to uniformly.
(c) is by the uniformly mixed dispersion liquid of step (b) and fermented tea bacterium solution according to culture solution therein and fermented tea bacterium solution
Mass ratio is 1:1 mixing, and wherein the mass concentration of fermented tea is 5% in fermented tea bacterium solution, is placed in 30 DEG C of constant temperature
Lower carry out stationary culture.
(d) boils the mycoderm that above-mentioned (c) is obtained with buck, to play the role of sterilization and removal of impurities, then using ultrapure
Water starts the cleaning processing, and is freeze-dried, and obtains flexible metatitanic acid lithium electrode.
Embodiment 2
A kind of preparation method of flexible electrode, the active material of the flexible electrode are lithium titanate, and preparation method includes such as
Lower step:
(a) takes 2g black tea, 400g ultrapure water, 40g glucose, and sterilization treatment after mixing is configured to 442g culture solution.
(b) puts into 9.3g lithium titanate and 0.7g carbon nanotube in above-mentioned culture solution, and Ultrasonic Pulverization is dispersed to uniformly.
(c) is by the uniformly mixed dispersion liquid of step (b) and fermented tea bacterium solution according to culture solution therein and fermented tea bacterium solution
Mass ratio is 1:3 mixing, and wherein the mass concentration of fermented tea is 20% in fermented tea bacterium solution, is placed in 30 DEG C of constant temperature
Lower carry out stationary culture.
(d) boils the mycoderm that above-mentioned (c) is obtained with buck, to play the role of sterilization and removal of impurities, then using ultrapure
Water starts the cleaning processing, and is freeze-dried, and obtains flexible metatitanic acid lithium electrode.
Embodiment 3
A kind of preparation method of flexible electrode, the active material of the flexible electrode are lithium titanate, and preparation method includes such as
Lower step:
(a) takes 2.5g black tea, 500g ultrapure water, 50g glucose, and sterilization treatment after mixing is configured to 552.5g culture
Liquid.
(b) puts into 9.0g lithium titanate and 1.0g carbon nanotube in above-mentioned culture solution, and Ultrasonic Pulverization is dispersed to uniformly.
(c) is by the uniformly mixed dispersion liquid of step (b) and fermented tea bacterium solution according to culture solution therein and fermented tea bacterium solution
Mass ratio is 1:2 mixing, and wherein the mass concentration of fermented tea is 5% in fermented tea bacterium solution, is placed in 25 DEG C of constant temperature
Lower carry out stationary culture.
(d) boils the mycoderm that above-mentioned (c) is obtained with buck, to play the role of sterilization and removal of impurities, then using ultrapure
Water starts the cleaning processing, and is freeze-dried, and obtains flexible metatitanic acid lithium electrode.
Embodiment 4
A kind of preparation method of flexible electrode, the active material of the flexible electrode are lithium titanate, and preparation method includes such as
Lower step:
(a) takes 3g black tea, 500g ultrapure water, 40g glucose, and sterilization treatment after mixing is configured to 543g culture solution.
(b) puts into 9.5g lithium titanate and 0.5g carbon nanotube in above-mentioned culture solution, and Ultrasonic Pulverization is dispersed to uniformly.
(c) is by the uniformly mixed dispersion liquid of step (b) and fermented tea bacterium solution according to culture solution therein and fermented tea bacterium solution
Mass ratio is 1:1.5 mixing, and wherein the mass concentration of fermented tea is 30% in fermented tea bacterium solution, is placed in 30 DEG C of constant temperature item
Stationary culture is carried out under part.
(d) boils the mycoderm that above-mentioned (c) is obtained with buck, to play the role of sterilization and removal of impurities, then using ultrapure
Water starts the cleaning processing, and is freeze-dried, and obtains flexible metatitanic acid lithium electrode.
Embodiment 5
A kind of preparation method of flexible electrode, preparation method include the following steps:
(a) takes 1.2g black tea, 200g ultrapure water, 20g glucose, and sterilization treatment after mixing is configured to 221.2g culture
Liquid.
(b) by 9.5g lithium titanate and the culture solution of 0.5g carbon nanotube investment step (a), Ultrasonic Pulverization is dispersed to
It is even.
(c) is by the uniformly mixed dispersion liquid of step (b) and fermented tea bacterium solution according to culture solution therein and fermented tea bacterium solution
Mass ratio is 1:1 mixing, and wherein the mass concentration of fermented tea is 10% in fermented tea bacterium solution, is placed in 30 DEG C of constant temperature
Lower carry out stationary culture, obtains flexible cathode, which is in g., jelly-like.
(d) after a week, the culture solution of preparation such as step (a), and by the culture solution being prepared and fermented tea bacterium solution according to
Mass ratio (wherein the mass concentration of fermented tea is 10% in fermented tea bacterium solution) mixed liquor of 1:1 is added to the culture of step (c)
In ware, continue 30 DEG C of constant temperature incubations, to obtain blank fermented tea mycoderm, fermented tea mycoderm is grown up in the flexible cathode table of g., jelly-like
Face is in equally g., jelly-like, and the fermented tea mycoderm is as diaphragm.
(e) the preparation such as culture solution of step (a), 9.5g LiFePO4 and 0.5g carbon nanotube are put into the culture solution,
Ultrasonic disperse obtains dispersion liquid to uniform.
(f) after a week, the dispersion liquid and fermented tea bacterium solution that step (e) is obtained are according to culture solution therein and fermented tea by
Bacterium solution mass ratio is that 1:1 (wherein the mass concentration of fermented tea is 10% in fermented tea bacterium solution) mixed liquor is added to step (d)
Culture dish in, continue 30 DEG C of constant temperature incubations, so that flexible anode is grown on fermented tea mycoderm surface, obtain flexible anode, until
This, obtains integrated flexible electrode, which is three layers of g., jelly-like structure of stacking, is followed successively by from the bottom up flexible negative
Pole, fermented tea mycoderm, flexible anode, boil by buck, to play the role of sterilization and removal of impurities, are then carried out using ultrapure water
Cleaning treatment, and be freeze-dried, the integrated flexible electrode that can be used.
In order to verify the chemical property for the flexible electrode that above-described embodiment 1~5 obtains, relevant property is carried out to it below
It can test.
(1) scanning electron microscope diagram (SEM)
Using Tescan mira3, Oxford equipment carries out SEM scanning to the flexible electrode that Examples 1 to 5 is prepared,
As a result as shown in Figure 1, 2 respectively.
Fig. 1 a~1d respectively corresponds Examples 1 to 4, from fig. 1, it can be seen that the tridimensional network of flexible electrode is presented well,
Tiny lithium titanate particle is uniformly dispersed in the inside of reticular structure, tightly winds package by cellulose silk and carbon nanotube,
Need to meet excellent electric conductivity while guaranteeing flexible.Meanwhile the concentration of active material is higher, and higher material may be implemented
Material load.Good dispersibility is wherein showed in Fig. 1 a, and active material, conductive agent, cellulose have good distribution
Ratio effect.
As can be seen from Figure 2, layer structure has apparent three layers, and part is anode and cathode above and below, and centre is sky
White membrane portions.Positive and negative anodes have apparent distribution of particles, while positive and negative anodes and diaphragm have unusual good contact, and are linked to be
One, the integrated battery obtained in this way can guarantee flexible battery in the process of bending, keep good with stable structure
Good performance.
(2) electrochemical property test
Flexible metatitanic acid lithium electrode that Examples 1 to 4 is obtained and lithium piece, electrolyte (EC:EMC:DMC=1:1:1vol%,
1M LiPF6), 2400 diaphragm of Celgard is assembled into flexible lithium ion battery in glove box, the flexible lithium ion battery
Nominal capacity is the intermediate plate battery of 1mAh, after being completed, is stood for 24 hours, then permanent with the electric current of 1C on new prestige charge and discharge instrument
Stream charge and discharge, voltage range 0.1-2V, as a result as illustrated in figures 3-6.
Fig. 3~6 respectively correspond the cycle performance of Examples 1 to 4.Wherein, as can be seen from Figure 2, which has extraordinary
Cycle performance, 1000 circle of circulation are not decayed significantly, and capacity retention ratio is 90% or more.Meanwhile the coulomb in cyclic process
Efficiency is higher, close to 100%.The cycle performance of the obtained electrode of comparative example 1~4, when active material and conductive agent
When ratio is 95:5, cycle performance behaves oneself best.By changing the additive amount of culture, discovery increases the amount of culture solution, may
The overall conductivity of electrode is reduced, so cycle performance is slightly worse with embodiment 1.
Integrated electrochemical cell (lithium titanate+diaphragm+LiFePO4) that embodiment 5 is obtained be added suitable electrolyte (EC:
EMC:DMC=1:1:1vol%, 1M LiPF6), flexible lithium ion battery is assembled into glove box, the flexible lithium ion battery
Nominal capacity be 2.5mAh intermediate plate battery, after being completed, stand for 24 hours, then with the electricity of 1C on new prestige charge and discharge instrument
Stream constant current charge and discharge, voltage range 2.5-3.9V, as a result as shown in Figure 7.
As can be seen from Figure 7, battery has good cycle performance, and in the case where high capacity, 200 circle battery capacity of circulation is also
There is 1.5mAh, meanwhile, coulombic efficiency in cyclic process is close to 100%.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Made any modifications, equivalent replacements, and improvements etc. within mind and principle should all include within protection scope of the present invention.
Claims (10)
1. a kind of flexible electrode, which is characterized in that the flexible electrode is flexible anode or flexible cathode, the flexible anode
And/or flexible cathode includes flexible mycoderm, conductive agent and the active material with tridimensional network, wherein the conductive agent
It fills and is incorporated into the tridimensional network of the flexible mycoderm with active material.
2. flexible electrode as described in claim 1, which is characterized in that if the flexible electrode is flexible cathode, the work
Property material be selected from any one of lithium titanate, natural graphite, silica-base material, metal oxide；
Such as flexible electrode is flexible anode, then the active material appointing in LiFePO4, cobalt acid lithium, ternary material
It is a kind of.
3. flexible electrode as described in claim 1, which is characterized in that the conductive agent is selected from graphene, carbon nanotube, conduction
At least one of carbon black.
4. flexible electrode as claimed in claim 1 or 2, which is characterized in that be filled in the flexible mycoderm three-dimensional network frame
The mass ratio of interior active material and conductive agent is (90~95): (5~10).
5. a kind of preparation method of such as described in any item flexible electrodes of Claims 1 to 4, which is characterized in that including following step
It is rapid:
There is provided containing black tea, high purity water, glucose culture solution；
Active material, conductive agent and fermented tea strain are added in the culture solution, mixes to being uniformly dispersed, obtains flexible electrical
Pole growth-promoting media；
The flexible electrode growth-promoting media is placed in stationary culture under 25~35 DEG C of constant temperature, obtains containing active material, lead
The mycoderm of electric agent；
It is cleaned, cleaning treatment, and is freeze-dried to the mycoderm, obtain flexible electrode.
6. the preparation method of flexible electrode as claimed in claim 5, which is characterized in that according to mass ratio, in the culture solution
Black tea: high purity water: glucose=(2~5): (400~600): (40~60)；
According to mass ratio, the active material: conductive agent: culture solution=(90~95): (5~10): (2212~5525).
7. the preparation method of flexible electrode as claimed in claim 5, which is characterized in that the fermented tea strain is with fermented tea bacterium
The mode of liquid is added, and the mass concentration of fermented tea is 5%~30% in the fermented tea bacterium solution；The addition of the fermented tea bacterium solution
Amount is the 50%~150% of culture solution quality.
8. the preparation method of flexible electrode as claimed in claim 5, which is characterized in that further include the mycoderm to acquisition before removal of impurities
Carry out the process of sterilization treatment.
9. a kind of flexible lithium ion battery, including anode and cathode, which is characterized in that described just extremely as Claims 1 to 4 is appointed
Flexible electrode described in one or the preparation method preparation to use such as described in any item flexible electrodes of claim 5~8
Obtained flexible electrode；And/or the cathode is such as the described in any item flexible electrodes of Claims 1 to 4 or is using such as
The flexible electrode that the preparation method of the described in any item flexible electrodes of claim 5~8 is prepared.
10. flexible lithium ion battery as claimed in claim 9, which is characterized in that the electrolyte of the flexible lithium ion battery
Using ethylene carbonate, dimethyl carbonate and methyl ethyl ester as solvent, with LiPF6For lithium salts；The flexibility lithium-ion electric
The diaphragm in pond is fermented tea mycoderm or polypropylene diaphragm or polyethylene diagrams.
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