CN105118979B - Lithium titanate material and preparation method thereof, the electrode plates using it, battery - Google Patents
Lithium titanate material and preparation method thereof, the electrode plates using it, battery Download PDFInfo
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- H—ELECTRICITY
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- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
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- H01M4/48—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides
- H01M4/485—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of mixed oxides or hydroxides for inserting or intercalating light metals, e.g. LiTi2O4 or LiTi2OxFy
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- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
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- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
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Abstract
A kind of preparation method of lithium titanate material, it comprises the following steps：A. the compound of titanium is mixed with the alkaline solution containing peroxide radical ion, obtains precursor solution A；B. Li source compound and carbonaceous organic material are mixed with above-mentioned precursor solution A, dissolves Li source compound, obtain precursor solution B；C. the precursor solution B is dried, obtains lithium titanate precursor；D. the lithium titanate precursor is sintered, obtains lithium titanate.The preparation method preparation technology of the lithium titanate material is simple, power consumption is low, environmentally friendly.In addition, the present invention also provides a kind of lithium titanate material as made from the preparation method of the lithium titanate material, a kind of electrode plates of the application lithium titanate material, a kind of lithium ion battery of the application electrode plates.
Description
Technical field
The present invention relates to a kind of preparation method of lithium titanate material, lithium titanate material obtained by this method, using the titanium
The lithium ion battery of the electrode plates and application of sour the lithium material electrode plates.
Background technology
Lithium ion battery there is the characteristic that energy density is high, has extended cycle life and be widely used in each electronic product and
In electric automobile.Electrode material of the lithium titanate material of spinel structure as lithium ion battery, the volume in charge and discharge process
Change small, Stability Analysis of Structures and the lithium ion diffusion admittance with three-dimensional structure, in addition, the embedding de- lithium current potential of lithium titanate material is put down
Platform is high, and lithium ion is bigger than graphite in the intracell diffusion coefficient of lithium titanate, and when quick charge and low temperature are charged, lithium ion is not yet
It can deposit, therefore lithium titanate material has very excellent cyclic reversibility, security, low temperature charging and quick charge
Performance.However, the preparation method power consumption of existing lithium titanate material is high, preparation technology is complicated and obtained lithium titanate material follows
Ring poor-performing.
The content of the invention
In view of this, it is necessary to provide that a kind of energy consumption is low and the preparation method of the simple lithium titanate material of technique.
A kind of lithium titanate material as made from the preparation method of above-mentioned lithium titanate material is provided in addition, there is a need to.
A kind of electrode plates using above-mentioned lithium titanate material are provided in addition, there is a need to.
A kind of lithium ion battery using above-mentioned electrode plates is provided in addition, there is a need to.
A kind of preparation method of lithium titanate material, it comprises the following steps：
A. the compound of titanium is mixed with the alkaline solution containing peroxide radical ion, obtains precursor solution A；
B. Li source compound and carbonaceous organic material are mixed with above-mentioned precursor solution A, dissolves Li source compound, obtain
To precursor solution B；
C. the precursor solution B is dried, obtains lithium titanate precursor；
D. the lithium titanate precursor is sintered, obtains lithium titanate.
A kind of lithium titanate material as made from the preparation method of above-mentioned lithium titanate material, the lithium titanate material are by lithium titanate
The close solid nano level spherical lithium titanate particle that nanocrystalline growth in situ forms, the lithium titanate particle have spinelle knot
Structure, a diameter of 50 ~ 250nm of the lithium titanate particle, specific surface area are 30 ~ 80m2/ g, phosphorus content are 1% ~ 3%wt, tap density
For 1.0 ~ 1.9g/cm3, the nanocrystalline a diameter of 5 ~ 25nm of the lithium titanate.
A kind of electrode plates, the electrode plates include conducting base and are attached to the above-mentioned lithium titanate material of the conducting base
Material.
A kind of lithium ion battery, including positive pole, negative pole and electrolyte, the negative or positive electrode include above-mentioned lithium titanate material
Material.
[Ti is prepared by the reaction of the compound of peroxide and titanium in the preparation method of the lithium titanate material of the present invention
(OH)3O2]-, and slow down [Ti (OH) using alkaline environment3O2]-Decomposition rate, make the TiO of embedding lithium made from drying2With compared with
Small particle diameter, the carbonaceous organic material are used for the TiO for coating embedding lithium2, advantageously form the lithium titanate particle of small size, and can be with
The spherical structure of lithium titanate particle is maintained in sintering process, and then makes the titanium of the nanometer spherical of lithium titanate material made from sintering
Sour lithium particle has less size, and the tap density of obtained lithium titanate material is larger, and preparation technology is simple, power consumption
It is low, environmentally friendly.In addition, when being used for the electrode material of lithium ion battery using lithium titanate material made from the above method, the lithium ion
The good cycle of battery and stably, the specific capacity conservation rate of electrode material is high, the high rate performance of battery is excellent.
Brief description of the drawings
Fig. 1 is the preparation method of the lithium titanate material of better embodiment of the present invention.
Fig. 2 is the scanning electron microscope (SEM) photograph of the lithium titanate material obtained by embodiment 1.
Fig. 3 is the transmission electron microscope picture of the lithium titanate material obtained by embodiment 1.
Fig. 4 is the X-ray diffractogram of the lithium titanate material obtained by embodiment 1.
Fig. 5 is cycle performance of the lithium titanate material as the lithium ion battery of electrode material obtained by Application Example 1
Test result curve map.
Fig. 6 is high rate performance of the lithium titanate material as the lithium ion battery of electrode material obtained by Application Example 1
Test result curve map.
Main element symbol description
| Carbon-coating | 10 |
Following embodiment will combine above-mentioned accompanying drawing and further illustrate the present invention.
Embodiment
Referring to Fig. 1, the present invention provides a kind of preparation method of lithium titanate material, the lithium titanate material be mainly used in lithium from
The electrode of sub- battery（It is not shown）In, it comprises the following steps：
Step S1, the compound of titanium is mixed with the alkaline solution containing peroxide radical ion, obtains precursor solution A；
Specifically, being first well mixed alkaline solution, peroxide and solvent according to default ratio, PH is obtained>7 it is mixed
Solution is closed, then the compound of titanium is added in the mixed solution and stirred, the compound of titanium is completely dissolved, it is molten to obtain presoma
Liquid A.The ratio of the amount of the material of the amount of the material of the peroxide and the titanium elements in the compound of titanium is more than or equal to 1：1.
Wherein, the alkaline solution includes but is not limited in ammoniacal liquor, sodium hydroxide, aniline and methylamine solution one kind or
It is several.The peroxide is hydrogen peroxide.The solvent can be water, preferably distilled water, deionized water, high purity water or super
Pure water.The one or more that the compound of the titanium includes but is not limited in titanium chloride, titanium nitride, titanium carbide and titanyl sulfate.
Being generated in the precursor solution A has [Ti (OH)3O2]-Ion, generate [Ti (OH)3O2]-The reaction equation of ion is Ti4++
H2O2+5OH-→[Ti(OH)3O2]-+2H2O.Should [Ti (OH)3O2]-Ion can hydrolyze generation TiO2, the reaction equation of hydrolysis
For 2 [Ti (OH)3O2]-→2TiO2+2H2O+O2+2 OH-.Pass through [Ti (OH)3O2]-Hydrolysis equation understand, alkaline ring
Border can suppress [Ti (OH)3O2]-Hydrolysis, so as to slow down TiO2Generating rate, be easy to short grained TiO2Generation.
Step S2, Li source compound and carbonaceous organic material are mixed with above-mentioned precursor solution A, make Li source compound molten
Solution, obtains precursor solution B.
Specifically, first a certain amount of diluent and solvent are added in above-mentioned precursor solution A and be well mixed, Ran Houjia
Enter Li source compound and carbonaceous organic material and be well mixed, be completely dissolved Li source compound and carbonaceous organic material, obtain yellowish
Color emulsus precursor solution B.Wherein, the diluent and solvent are used for the concentration for adjusting precursor solution A.The diluent and solvent
Volume ratio be preferably 1：（0.1~10）, the ratio of the amount of the material of elemental lithium and titanium elements is in precursor solution B（4~5）：
The mass ratio of the compound of carbonaceous organic material and titanium is 1 in 5, precursor solution B：（5~10）.
The carbonaceous organic material may be selected from but be not limited to glucose, citric acid, cetyl trimethylammonium bromide, ten
One or more in two alkanamines, polyvinylpyrrolidone and polyaniline.The diluent can be molten for ketone solution, alcohols
Liquid, ethers solution, arene solution etc., wherein, the ketone solution can be butanone, acetone, MEK etc., the alcohol solution
Can be absolute ethyl alcohol, ethylene glycol, isopropanol, methanol etc., the ethers solution can be ether, expoxy propane etc., the aromatic hydrocarbon
Class solution can be benzene,toluene,xylene etc..The Li source compound may be selected from but be not limited to lithium acetate, lithium carbonate, fluorination
One or more in lithium, lithium hydroxide, lithium oxalate and lithium chloride.
Step S3, the precursor solution B is dried, obtains solid lithium titanate precursor, is contained in the lithium titanate precursor
The TiO of embedding lithium2。
Specifically, by the way of above-mentioned precursor solution B is dried, make diluent in precursor liquid B and solvent complete
Portion volatilizees, and obtains the lithium titanate precursor of solid.Wherein, drying temperature be 60 DEG C ~ 150 DEG C, the time used in drying be 10h with
On, drying course can promote [Ti (OH)3O2]-Hydrolysis generation TiO2, and make Lithium-ion embeding TiO2In.It is described in the present embodiment
Lithium titanate precursor is white powder.
Step S4, the lithium titanate precursor is sintered, obtains lithium titanate.
5 ~ 15h is sintered specifically, the lithium titanate precursor is placed in stove under protective atmosphere, wherein sintering temperature is
500~900℃.Then room temperature is naturally cooled to furnace temperature, that is, obtains lithium titanate.
The protective atmosphere is the inert gases such as conventional use of argon gas.The lithium titanate material is nanocrystalline by lithium titanate
The close solid nano level spherical lithium titanate particle that growth in situ forms（Call nanometer spherical lithium titanate particle in the following text）, the nanometer
Spherical lithium titanate particle has spinel structure.A diameter of 50 ~ 250nm of the nanometer spherical lithium titanate particle, specific surface area are
30~80m2/ g, phosphorus content are 1% ~ 3%wt, and tap density is 1.0 ~ 1.9g/cm3.The nanocrystalline a diameter of 5 ~ 25nm of the lithium titanate.
The preparation method of the lithium titanate material, [Ti (OH) is prepared by the reaction of the compound of peroxide and titanium3O2]-Ion, and slow down [Ti (OH) using alkaline environment3O2]-Decomposition rate, make the TiO of embedding lithium made from drying2With compared with
Small particle diameter, the carbonaceous organic material are used for the TiO for coating embedding lithium2, advantageously form the lithium titanate particle of small size, and can be with
The spherical structure of lithium titanate particle is maintained in sintering process, and then makes the lithium titanate of lithium titanate material made from sintering nanocrystalline
Diameter there is reduced size（5~25nm）, while make have the lithium titanate of reduced size is nanocrystalline being grown to nanometer spherical
Equally there is less size, and the tap density of obtained lithium titanate material is larger during lithium titanate particle.
When the lithium titanate material being prepared into using the above method is used for into the electrode material of lithium ion battery, the lithium-ion electric
After pond circulates 500 weeks under the conditions of 10C/10C discharge and recharge, the specific capacity conservation rate of the electrode material of battery more than 90%,
10C charge/discharge capacity is 100.2 ~ 150.1mAh/g.
Below by specific embodiment, the present invention will be further described.
Embodiment 1
Pair for being 20% ~ 30% by 30mL deionized waters, the ammoniacal liquor that 18mL mass fractions are 25% ~ 28%, 12mL mass fractions
Oxygen water is well mixed, and obtains mixed solution.
0.5g titanium nitride is added in above-mentioned mixed solution, stirring is completely dissolved it, obtains precursor solution A.
Isopropanol and 100ml deionized waters that 50ml mass fractions are 99.9% are added in above-mentioned precursor solution A and mixed
Close uniformly, be subsequently added into 0.3g lithium fluoride, 50mg glucose and be well mixed, be completely dissolved lithium fluoride and glucose,
Obtain faint yellow emulsus precursor solution B.
Precursor solution B is placed in 15h at 100 DEG C, is oven-dried precursor solution B, obtains the lithium titanate forerunner of white
Body.
Lithium titanate precursor is placed in stove and sinters 8h at argon atmosphere, 700 DEG C.Then with furnace temperature natural cooling
To room temperature, that is, lithium titanate material is obtained, the lithium titanate material is the lithium titanate particle of nanometer spherical.
Embodiment 2
Pair for being 20% ~ 30% by 40mL deionized waters, the ammoniacal liquor that 12mL mass fractions are 25% ~ 28%, 12mL mass fractions
Oxygen water is well mixed, and obtains mixed solution.
0.25g titanium carbide is added in above-mentioned mixed solution, stirring is completely dissolved titanium carbide, obtains precursor solution
A。
Isopropanol and 100ml deionized waters that 100ml mass fractions are 99.9% are added in above-mentioned precursor solution A simultaneously
It is well mixed, it is subsequently added into 0.3g lithium hydroxide, 100mg glucose and is well mixed, makes lithium hydroxide and glucose complete
Fully dissolved, obtain faint yellow emulsus precursor solution B.
Precursor solution B is placed in 36h at 80 DEG C, is oven-dried precursor solution B, obtains the lithium titanate forerunner of white
Body.
The lithium titanate precursor is placed in stove and sinters 5h at argon atmosphere, 700 DEG C.Then it is natural with furnace temperature
Room temperature is cooled to, that is, obtains lithium titanate material, the lithium titanate material is the lithium titanate particle of nanometer spherical.
Embodiment 3
It is 20% ~ 30% by 20mL deionized waters, the aniline solution that 12mL mass fractions are 10% ~ 15%, 6mL mass fractions
Hydrogen peroxide is well mixed, and obtains mixed solution.
0.25g titanium carbide is added in above-mentioned mixed solution, stirring is completely dissolved titanium carbide, obtains precursor solution
A。
Ethanol and 50ml deionized waters that 80ml mass fractions are 99.9% are added in above-mentioned precursor solution A and mixed
Uniformly, 0.5g lithium acetate, 30mg polyvinylpyrrolidone are subsequently added into and is well mixed, makes lithium acetate and polyvinyl pyrrole
Alkanone is completely dissolved, and obtains faint yellow emulsus precursor solution B.
Precursor solution B is placed in 36h at 80 DEG C, is oven-dried precursor solution B, obtains the lithium titanate forerunner of white
Body.
The lithium titanate precursor is placed in stove and sinters 7h at argon atmosphere, 700 DEG C.Then it is natural with furnace temperature
Room temperature is cooled to, that is, obtains lithium titanate material, the lithium titanate material is the lithium titanate particle of nanometer spherical.
Embodiment 4
Be 25% ~ 30% methylamine solution by 50mL deionized waters, 25mL mass fractions, 18mL mass fractions be 20% ~ 30%
Hydrogen peroxide is well mixed, and obtains mixed solution.
0.75g titanium chloride is added in above-mentioned mixed solution, stirring is completely dissolved titanium chloride, obtains precursor solution
A。
Ethanol and 80ml deionized waters that 150ml mass fractions are 99.9% are added in above-mentioned precursor solution A and mixed
Uniformly, 2.5g lithium oxalate, 100mg polyvinylpyrrolidone are subsequently added into and is well mixed, makes lithium oxalate and polyethylene pyrrole
Pyrrolidone is completely dissolved, and obtains faint yellow emulsus precursor solution B.
Precursor solution B is placed in 18h at 150 DEG C, is oven-dried precursor solution B, obtains the lithium titanate forerunner of white
Body.
The lithium titanate precursor is placed in stove and sinters 12h at argon atmosphere, 800 DEG C.Then with furnace temperature certainly
Room temperature so is cooled to, that is, obtains lithium titanate material, the lithium titanate material is the lithium titanate particle of nanometer spherical.
Embodiment 5
It is 20% ~ 30% by 100mL deionized waters, the methylamine solution that 25mL mass fractions are 25% ~ 30%, 64mL mass fractions
Hydrogen peroxide be well mixed, obtain mixed solution.
2g titanyl sulfate is added in above-mentioned mixed solution, stirring is completely dissolved it, obtains precursor solution A.
Ethanol and 200ml deionized waters that 50ml mass fractions are 99.9% are added in above-mentioned precursor solution A and mixed
Uniformly, 1.5g lithium acetate, 220mg citric acid are subsequently added into and is well mixed, lithium acetate and citric acid is completely dissolved, obtains
To faint yellow emulsus precursor solution B.
Precursor solution B is placed in 30h at 120 DEG C, is oven-dried precursor solution B, obtains the lithium titanate forerunner of white
Body.
The lithium titanate precursor is placed in stove and sinters 15h at argon atmosphere, 800 DEG C.Then with furnace temperature certainly
Room temperature so is cooled to, that is, obtains lithium titanate material, the lithium titanate material is the lithium titanate particle of nanometer spherical.
Further referring to Fig. 2 ~ 6, lithium titanate material made from above-described embodiment 1 is tested, obtains ESEM
Figure, transmission electron microscope picture, X-ray diffractogram.Test using lithium titanate and lithium piece as the cycle performance of the lithium ion battery of electrode with
High rate performance（The conventional test in laboratory uses the side of the performance of the lithium ion battery of the electrode plates as made from lithium titanate material
Method）, respectively obtain cycle performance test result curve map and high rate performance test result curve map.The wherein lithium ion battery
Electrolyte is with LiPF6（Lithium hexafluoro phosphate）As solute, using volume ratio as 1:1:1 ethylene carbonate, diethyl carbonate, carbon
Sour methyl ethyl ester is as solvent, the LiPF of configuration6Concentration is 1mol/L electrolyte.
The particle of obtained lithium titanate material is brilliant for monodispersed, size uniformity point it can be seen from Fig. 2 and Fig. 3
The nanometer spherical particle of stone-type structure, and a diameter of 100 ~ 150nm of nanometer spherical particle.
Obtained lithium titanate material is close solid spherical it can be seen from Fig. 3 a photos.By Fig. 3 b photos
For high-resolution-ration transmission electric-lens figure, the interplanar distance of obtained lithium titanate material is 0.48nm it can be seen from the figure, is corresponded to
Nanocrystalline (111) crystal face of lithium titanate, you can it is spinel structure to prove it.The lithium titanate it is nanocrystalline a diameter of 5 ~
25nm.The nanocrystalline Surface coating of the lithium titanate has a carbon-coating 10, and the carbon-coating 10 can effectively keep lithium titanate nanocrystalline
Spherical structure.
As shown in Figure 4, obtained lithium titanate material crystalline phase is single and with the spinelle crystal formation titanium of very high crystalline
Sour lithium, other any dephasigns are not contained.
As seen from Figure 5, filled using obtained lithium titanate material as the lithium ion battery of electrode in 10C/10C
After 200 weeks are circulated under discharging condition, the specific capacity conservation rate of the lithium titanate electrode material of the lithium ion battery is 93.4%, performance
Go out very excellent cyclical stability.
As seen from Figure 6, using obtained lithium titanate material as the lithium ion battery of electrode, in 0.1C discharge and recharges
Specific capacity be 174.5mAh/g, the specific capacity of 0.5C discharge and recharges is 165.6mAh/g, and the specific capacity of 1C discharge and recharges is
The specific capacity of 157.7mAh/g, 2C discharge and recharge is 151.3mAh/g, and the specific capacities of 5C discharge and recharges is 134.4mAh/g, 10C charge and discharges
The specific capacity of electricity is 122.5mAh/g, and the specific capacity of 20C discharge and recharges is 106.5mAh/g, and the specific capacity of 30C discharge and recharges is
The specific capacity of 104.3mAh/g, 50C discharge and recharge is 88.6mAh/g, shows excellent high rate performance.
A kind of electrode plates（It is not shown）, the electrode plates include conducting base and are attached to the above-mentioned titanium of the conducting base
Sour lithium material.
A kind of lithium ion battery（It is not shown）, it is used in the electronic installations such as mobile phone, computer, electronic reader, electric car.
The lithium ion battery includes positive pole, negative pole and electrolyte, and the negative or positive electrode includes above-mentioned electrode plates.
[Ti is prepared by the reaction of the compound of peroxide and titanium in the preparation method of the lithium titanate material of the present invention
(OH)3O2]-Ion, and slow down [Ti (OH) using alkaline environment3O2]-Decomposition rate, make the TiO of embedding lithium made from drying2Tool
There is less particle diameter, the carbonaceous organic material is used for the TiO for coating embedding lithium2, the lithium titanate particle of small size is advantageously formed, and
The spherical structure of lithium titanate particle can be maintained in sintering process, and then make the nanometer spherical of lithium titanate material made from sintering
Lithium titanate particle there is less size, and the tap density of obtained lithium titanate material is larger, and preparation technology is simple, consumption
Can be low, environmentally friendly.In addition, using lithium titanate material made from the above method be used for lithium ion battery electrode material when, the lithium from
The good cycle of sub- battery and stably, the specific capacity conservation rate of electrode material is high, the high rate performance of battery is excellent.
Those skilled in the art it should be appreciated that the embodiment of the above be intended merely to explanation the present invention,
And be not used as limitation of the invention, as long as within the spirit of the present invention, above example is made
It is appropriate to change and change all to fall within the scope of protection of present invention.
Claims (8)
1. a kind of preparation method of lithium titanate material, it comprises the following steps：
A. the compound of titanium is mixed with the alkaline solution containing peroxide radical ion, obtains precursor solution A；
B. diluent and solvent are added in precursor solution A and mixed, then again gather Li source compound and carbonaceous organic material
Compound mixes with above-mentioned precursor solution A, dissolves Li source compound, obtains precursor solution B, and the diluent is organic molten
Agent；The volume ratio of the diluent and solvent is 1:(0.1~10), the diluent are selected from ketone solution, alcohol solution, ethers
One or more in solution, arene solution；The solvent is deionized water；
C. the precursor solution B is dried, obtains lithium titanate precursor；
D. the lithium titanate precursor is sintered, obtains lithium titanate.
2. the preparation method of lithium titanate material as claimed in claim 1, it is characterised in that：The precursor solution A pass through by
Alkaline solution and peroxide mix according to default ratio, obtain PH>7 mixed solution, then the compound of titanium is added and mixed
Solution is closed to be prepared, wherein, the ratio of the amount of the material of the amount of the material of peroxide and the titanium elements in the compound of titanium is big
In or equal to 1：1.
3. the preparation method of lithium titanate material as claimed in claim 2, it is characterised in that：The peroxide is peroxidating
Hydrogen；One or more of the alkaline solution in ammoniacal liquor, aniline and methylamine；The compound of the titanium is selected from titanium chloride, nitrogen
Change the one or more in titanium, titanium carbide and titanyl sulfate.
4. the preparation method of lithium titanate material as claimed in claim 1, it is characterised in that：The Li source compound is selected from acetic acid
One or more in lithium, lithium carbonate, lithium fluoride, lithium hydroxide, lithium oxalate and lithium chloride；The carbonaceous organic material polymer
One or more in polyvinylpyrrolidone and polyaniline；The thing of elemental lithium and titanium elements in the precursor solution B
The ratio of the amount of matter is (4~5)：5, the mass ratio of the compound of carbonaceous organic material polymer and titanium is 1：(5~10).
5. the preparation method of lithium titanate material as claimed in claim 1, it is characterised in that the step c is：Presoma is molten
Liquid B dries more than 10h at a temperature of being placed on 60 DEG C~150 DEG C, obtains lithium titanate precursor；
The step d is：Lithium titanate precursor is placed in stove into 5~15h of sintering, wherein sintering temperature under protective atmosphere is
500~900 DEG C.
6. lithium titanate material made from a kind of preparation method of lithium titanate material as described in Claims 1 to 5 any one, its
It is characterised by：The lithium titanate material is the close solid nano level spherical metatitanic acid formed by the nanocrystalline growth in situ of lithium titanate
Lithium particle, the lithium titanate particle have spinel structure, a diameter of 50~250nm of the lithium titanate particle, specific surface area 30
~80m2/ g, phosphorus content are 1%~3%wt, and tap density is 1.0~1.9g/cm3, the lithium titanate it is nanocrystalline a diameter of 5~
25nm。
A kind of 7. electrode plates, it is characterised in that：The electrode plates include conducting base and be attached to the conducting base as power
Profit requires lithium titanate material made from the preparation method of the lithium titanate material described in 1~5 any one.
8. a kind of lithium ion battery, it includes positive pole, negative pole and electrolyte, it is characterised in that：The negative or positive electrode is included such as
Lithium titanate material made from the preparation method of lithium titanate material described in Claims 1 to 5 any one.
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