CN106058355A - Method for recycling lithium titanate electrode slice - Google Patents
Method for recycling lithium titanate electrode slice Download PDFInfo
- Publication number
- CN106058355A CN106058355A CN201610665778.3A CN201610665778A CN106058355A CN 106058355 A CN106058355 A CN 106058355A CN 201610665778 A CN201610665778 A CN 201610665778A CN 106058355 A CN106058355 A CN 106058355A
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- CN
- China
- Prior art keywords
- lithium titanate
- negative electrode
- electrode plate
- active material
- electrode active
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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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
- H01M10/54—Reclaiming serviceable parts of waste accumulators
-
- 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
- H01M4/36—Selection of substances as active materials, active masses, active liquids
- 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
-
- 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
-
- 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
- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
- Y02W30/00—Technologies for solid waste management
- Y02W30/50—Reuse, recycling or recovery technologies
- Y02W30/84—Recycling of batteries or fuel cells
Abstract
The invention relates to the lithium battery recycling technical field, and in particular, relates to a method for recycling a lithium titanate electrode slice, wherein the method comprises the following steps: (1) removing impurities on a lithium titanate negative electrode slice, and retaining a pole slice part containing a negative electrode active material and an aluminum foil; and (2) carrying out primary firing treatment on the pole slice part containing the negative electrode active material and the aluminum foil at the temperature of 300-600 DEG C, separating to obtain the negative electrode active material and the aluminum foil, carrying out scrap metal recycling treatment of the aluminum foil, then crushing the negative electrode active material, and sieving, to obtain a lithium titanate negative electrode material. The method for recycling the lithium titanate electrode slice has the advantages of little environmental pollution, high recycling rate, easy realization of industrialization, simpliness, and low operation cost, has positive effects on reducing the production costs of lithium batteries, saving resources and protecting the environment, and has more important significance on promoting application and development of the lithium batteries.
Description
Technical field
The present invention relates to lithium battery recovery technology field, be specifically related to a kind of method recycling lithium titanate electrode plate.
Background technology
Lithium ion battery is referred to as " rocking chair batteries ", and it relies primarily on lithium ion movement between a positive electrode and a negative electrode and carrys out work
Make.During charging, Li+From positive pole deintercalation.Embedding negative pole through electrolyte, negative pole is in rich lithium state；During electric discharge the most contrary.With business
The carbon negative pole material of product is compared, lithium titanate with spinel structure (Li4Ti5O12) there is three-dimensional net structure, can carry out quickly
Discharge and recharge, has high rate charge-discharge characteristic；Lithium titanate is not recurring structure change in charge and discharge process, is referred to as " zero strain "
Material, has the most excellent cycle performance；Charge and discharge platform is up to 1.55V (vs Li+), there is good security performance；Reason
Opinion specific capacity is 175mAh/g, and actual specific capacity, up to 165mAh/g, is therefore widely used as ion cathode material lithium.Along with titanium
The increase rapidly of acid lithium battery consumption, the lithium titanate battery scrapped increases considerably the most year by year.Waste and old lithium titanate battery contains
There is substantial amounts of valuable metal, including metallic elements such as titanium, lithium, aluminum, not only can produce huge economic effect if can reclaim
Benefit, and decrease the pollution to environment, economize on resources, reduce energy consumption, it is possible to realize the supervention exhibition of battery industry.
There is a lot of researcher that the recovery of waste and old lithium ion battery material negative material has been done greatly with regeneration in recent years
The work of amount, as Chinese Patent Application No. CN201310306520.0 discloses a kind of anticathode material from waste and old lithium ion battery
The method of work stone ink regeneration；Chinese Patent Application No. CN200810030494.2 discloses a kind of recovery lithium-ion negative pole material
Material recovery method, mainly reclaims carbon element negative material；Chinese Patent Application No. CN 201010236448.5 discloses a kind of returning
Receive method on the inferior cathode pole piece of lithium battery；Chinese Patent Application No. 200910040963.3 discloses a kind of lithium ion battery stone
The recovery method of ink class negative material；Chinese Patent Application No. CN201110233096.2 discloses and a kind of utilizes waste and old negative pole titanium
The method that acid lithium prepares lithium carbonate, it is achieved thereby that the regeneration of lithium titanate pole piece.
In sum, the recovery method currently for waste and old lithium ion battery graphite negative electrodes is more, and for novel negative
The recovery of pole material of lithium titanate is also little, the most effectively recycles for active material lithium titanate.Lithium titanate is made
Negative material for lithium ion battery has been widely used in lithium ion battery, in the manufacturing process of lithium titanate anode sheet,
Because of misoperation, be unevenly coated, the reason such as part de-material, off-dimension causes substantial amounts of pole piece can not meet prescription
And become defective work, these operations also there will be leftover pieces etc., waste and old lithium titanate battery also have lithium titanate pole piece,
These pole pieces all can not directly be reused, it is necessary to recycled after other processing modes process, but for metatitanic acid
The processing mode of cathode of lithium pole piece is seldom, the most blank for reclaiming the method for lithium titanate from lithium titanate pole piece.
Summary of the invention
It is an object of the invention to solve above technical problem, it is provided that a kind of method recycling lithium titanate electrode plate,
Realizing recycling lithium titanate electrode plate by burning till, pulverize, sieving, method is simple, and running cost is low, to reducing lithium battery
Production cost, economize on resources, protect environment all to have positive role, the application development promoting lithium battery is had important especially
Meaning.
For solve the problems referred to above, the present invention by the following technical solutions:
A kind of method recycling lithium titanate electrode plate, comprises the following steps:
(1) remove the impurity on lithium titanate anode pole piece, retain containing negative electrode active material and the pole piece part of aluminium foil；
(2) the pole piece part containing negative electrode active material and aluminium foil is done at 300-600 DEG C once-firing process, separate
Obtaining negative electrode active material and aluminium foil, aluminium foil does waste metal recycling, is then pulverized by negative electrode active material, sieves,
To lithium titanate anode material.
Further, in described step (1), lithium titanate anode pole piece is by waste and old lithium titanate battery is done discharge process,
Taking out battery core, the electrolyte in battery core is removed in baking, removes battery core, obtains lithium titanate anode pole piece.
Further, taking out battery core in described step (1) is to complete in inert gas environment.
Further, in described step (1), the temperature of baking is 40-80 DEG C, and the time of baking is 1-5h.
Further, in described step (2), the time of once-firing is 0.5-3h.
Further, pulverizing in described step (2) is to be completed by least one in mechanical activation comminution, comminution by gas stream.
Further, described mechanical activation comminution is ball mill pulverizing.
Further, described step (2) is pulverized between screening, also include twice firing, described twice firing be
Carry out at 550-800 DEG C.
Further, the time of described twice firing is 0.5-3h.
Further, the screen cloth of described screening is 20-200 mesh.
The present invention will because of misoperation, be unevenly coated, the reason such as part de-material, off-dimension causes substantial amounts of useless titanium
Acid cathode of lithium pole piece and waste and old lithium titanate battery recycle, and first remove the impurity of lithium titanate anode pole piece, and reservation contains
There is the pole piece part of negative electrode active material and aluminium foil, then carry out once-firing, allow the binding agent in pole piece decompose and lose bonding
Effect, makes the active substance on pole piece be completely separated with aluminium foil, and the aluminium foil of isolated does waste metal recycling, and separates
The active substance obtained is size-reduced, twice firing, and the conductive agent reaction making unreacted complete is complete, and the color of active substance recovers white
Color, after screening, obtains lithium titanate anode material.
A kind of method recycling lithium titanate electrode plate of the present invention, compared with prior art, its prominent feature and excellent
Different effect is:
1. the present invention recycles the method for lithium titanate electrode plate to have environmental pollution little, and the response rate is high, it is simple to realize producing
The feature of industry.
2. the inventive method is simple, and running cost is low, to reducing the production cost of lithium battery, economizing on resources, protect environment
All there is positive role, the most significant to the application development promoting lithium battery.
Detailed description of the invention
Below by way of detailed description of the invention, the present invention is described in further detail, but this should be interpreted as the present invention
Scope be only limitted to Examples below.In the case of without departing from said method thought of the present invention, according to ordinary skill
Various replacements that knowledge and customary means are made or change, should be included in the scope of the present invention.
Embodiment 1
A kind of method recycling lithium titanate electrode plate:
(1) waste and old lithium titanate battery is done discharge process, take out battery core, at 80 DEG C, toast 1h, remove the electricity in battery core
Solve liquid, remove battery core, obtain lithium titanate anode pole piece, remove the impurity on lithium titanate anode pole piece, retain containing negative electrode active
The pole piece part of material and aluminium foil；
(2) the pole piece part containing negative electrode active material and aluminium foil is done at 600 DEG C once-firing and processes 0.5h, separate
Obtaining negative electrode active material and aluminium foil, aluminium foil does waste metal recycling, then by negative electrode active material mechanical activation comminution, then
At 800 DEG C, carry out twice firing 0.5h, with the sieved through sieve of 200 mesh, obtain lithium titanate anode material.
Embodiment 2
A kind of method recycling lithium titanate electrode plate:
(1) waste and old lithium titanate battery is done discharge process, take out battery core, at 40 DEG C, toast 5h, remove the electricity in battery core
Solve liquid, remove battery core, obtain lithium titanate anode pole piece, remove the impurity on lithium titanate anode pole piece, retain containing negative electrode active
The pole piece part of material and aluminium foil；
(2) the pole piece part containing negative electrode active material and aluminium foil is done at 300 DEG C once-firing and processes 3h, separate
To negative electrode active material and aluminium foil, aluminium foil does waste metal recycling, then by negative electrode active material comminution by gas stream, then exists
Carry out twice firing 3h at 550 DEG C, with the sieved through sieve of 20 mesh, obtain lithium titanate anode material.
Embodiment 3
A kind of method recycling lithium titanate electrode plate:
(1) waste and old lithium titanate battery is done discharge process, take out battery core, at 60 DEG C, toast 3h, remove the electricity in battery core
Solve liquid, remove battery core, obtain lithium titanate anode pole piece, remove the impurity on lithium titanate anode pole piece, retain containing negative electrode active
The pole piece part of material and aluminium foil；
(2) the pole piece part containing negative electrode active material and aluminium foil is done at 450 DEG C once-firing and processes 1.5h, separate
Obtaining negative electrode active material and aluminium foil, aluminium foil does waste metal recycling, then by negative electrode active material ball mill pulverizing, then
At 700 DEG C, carry out twice firing 1h, with the sieved through sieve of 40 mesh, obtain lithium titanate anode material.
Embodiment 4
A kind of method recycling lithium titanate electrode plate:
(1) remove the impurity on lithium titanate anode pole piece, retain containing negative electrode active material and the pole piece part of aluminium foil；
(2) the pole piece part containing negative electrode active material and aluminium foil is done at 500 DEG C once-firing and processes 1.5h, separate
Obtaining negative electrode active material and aluminium foil, aluminium foil does waste metal recycling, then by negative electrode active material comminution by gas stream, then
At 600 DEG C, carry out twice firing 2h, with the sieved through sieve of 100 mesh, obtain lithium titanate anode material.
Embodiment 5
A kind of method recycling lithium titanate electrode plate:
(1) remove the impurity on lithium titanate anode pole piece, retain containing negative electrode active material and the pole piece part of aluminium foil；
(2) the pole piece part containing negative electrode active material and aluminium foil is done at 550 DEG C once-firing and processes 1h, separate
To negative electrode active material and aluminium foil, aluminium foil does waste metal recycling, then by negative electrode active material comminution by gas stream, then exists
Carry out twice firing 2.5h at 600 DEG C, with the sieved through sieve of 20 mesh, obtain lithium titanate anode material.
Lithium titanate anode material embodiment 1-5 obtained and lithium titanate original material do button cell test data, knot
Fruit is such as table 1:
The lithium titanate anode material of table 1 embodiment 1-5 tests table with lithium titanate original material button cell
Claims (10)
1. the method recycling lithium titanate electrode plate, it is characterised in that comprise the following steps:
(1) remove the impurity on lithium titanate anode pole piece, retain containing negative electrode active material and the pole piece part of aluminium foil；
(2) the pole piece part containing negative electrode active material and aluminium foil is done at 300-600 DEG C once-firing process, isolated
Negative electrode active material and aluminium foil, aluminium foil does waste metal recycling, is then pulverized by negative electrode active material, sieves, obtains titanium
Acid lithium titanate cathode material.
A kind of method recycling lithium titanate electrode plate the most according to claim 1, it is characterised in that described step
(1) in, lithium titanate anode pole piece is by waste and old lithium titanate battery does discharge process, takes out battery core, and baking is removed in battery core
Electrolyte, removes battery core, obtains lithium titanate anode pole piece.
A kind of method recycling lithium titanate electrode plate the most according to claim 2, it is characterised in that described step
(1) taking out battery core in is to complete in inert gas environment.
A kind of method recycling lithium titanate electrode plate the most according to claim 2, it is characterised in that described step
(1) in, the temperature of baking is 40-80 DEG C, and the time of baking is 1-5h.
A kind of method recycling lithium titanate electrode plate the most according to claim 1, it is characterised in that described step
(2) in, the time of once-firing is 0.5-3h.
A kind of method recycling lithium titanate electrode plate the most according to claim 1, it is characterised in that described step
(2) pulverizing in is to be completed by least one in mechanical activation comminution, comminution by gas stream.
A kind of method recycling lithium titanate electrode plate the most according to claim 6, it is characterised in that described machinery powder
Broken for ball mill pulverizing.
A kind of method recycling lithium titanate electrode plate the most according to claim 1, it is characterised in that described step
(2) pulverize between screening in, also include that twice firing, described twice firing are to carry out at 550-800 DEG C.
A kind of method recycling lithium titanate electrode plate the most according to claim 8, it is characterised in that described secondary burns
The time become is 0.5-3h.
10. according to a kind of method recycling lithium titanate electrode plate described in claim 1 or 8, it is characterised in that described sieve
The screen cloth divided is 20-200 mesh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201610665778.3A CN106058355A (en) | 2016-08-15 | 2016-08-15 | Method for recycling lithium titanate electrode slice |
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| CN201610665778.3A CN106058355A (en) | 2016-08-15 | 2016-08-15 | Method for recycling lithium titanate electrode slice |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109896544A (en) * | 2019-01-30 | 2019-06-18 | 江西赣锋循环科技有限公司 | Recycle the method that waste and old lithium titanate anode material prepares metallurgical titanium dioxide and battery-level lithium carbonate |
| CN111285365A (en) * | 2019-01-02 | 2020-06-16 | 东莞鑫茂新能源技术有限公司 | Method for recycling waste negative electrode graphite material in lithium ion battery production process |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111285365A (en) * | 2019-01-02 | 2020-06-16 | 东莞鑫茂新能源技术有限公司 | Method for recycling waste negative electrode graphite material in lithium ion battery production process |
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Application publication date: 20161026 |