CN104659335A - Preparation method for lithium ion battery positive electrode material - Google Patents
Preparation method for lithium ion battery positive electrode material Download PDFInfo
- Publication number
- CN104659335A CN104659335A CN201410746022.2A CN201410746022A CN104659335A CN 104659335 A CN104659335 A CN 104659335A CN 201410746022 A CN201410746022 A CN 201410746022A CN 104659335 A CN104659335 A CN 104659335A
- Authority
- CN
- China
- Prior art keywords
- positive electrode
- preparation
- electrode material
- ion battery
- lithium ion
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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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Classifications
-
- 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
- H01M4/13—Electrodes for accumulators with non-aqueous electrolyte, e.g. for lithium-accumulators; Processes of manufacture thereof
- H01M4/139—Processes of manufacture
- H01M4/1391—Processes of manufacture of electrodes based on mixed oxides or hydroxides, or on mixtures of oxides or hydroxides, e.g. LiCoOx
-
- 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
- H01M4/52—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron
- H01M4/525—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of nickel, cobalt or iron of mixed oxides or hydroxides containing iron, cobalt or nickel for inserting or intercalating light metals, e.g. LiNiO2, LiCoO2 or LiCoOxFy
-
- 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
- H01M2004/026—Electrodes composed of, or comprising, active material characterised by the polarity
- H01M2004/028—Positive electrodes
-
- 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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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Inorganic Chemistry (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a preparation method for a lithium ion battery positive electrode material, and belongs to the field of preparation of a lithium ion battery positive electrode material. In order to solve the problem that the battery cycle performance is reduced in a current battery material mixing process, the invention provides the preparation method for the lithium ion battery positive electrode material which is good in current discharge performance and long in cycle service life. The preparation method comprises the following steps: as lithium carbonate and cobalt oxide are taken as main materials, mixing chemically metered superfine zirconium dioxide and superfine titanium dioxide in a ratio of grinding media to materials of 3 to 1, performing solid-phase sintering at 900 DEG C to prepare the lithium ion battery positive electrode material LiCo0.9Zr0.03Ti0.0702 after performing planetary ball milling for one hour at the rotation speed of 500r/min. The positive electrode material prepared by adopting the preparation method is good in large-current discharge performance, long in service life and good in application prospect.
Description
Technical field
The invention belongs to anode material for lithium-ion batteries preparation field.
Background technology
Lithium secondary battery becomes the focus of current new energy field research with its advantage such as high-energy-density and lightweight.The positive electrode Li-CoO of battery
2, reversible capacity high with discharge platform is large, Stability Analysis of Structures, becomes the first-selected positive electrode of lithium ion battery, but due to Co resource shortage, expensive, people constantly finding better substitute products, as LiNi0
2, LiMn
20
4and other new material, but the actual battery serviceability of these materials is all not so good as LiCoO
2.In order to obtain, discharge voltage is higher, the better LiCo0 of cyclical stability
2, people are to LiCoO
2carry out the doping vario-property research of different element, as doped with Al, Mg, F, Ni etc.As electrode insertion material, at Li
+the stability of carrying out electrochemistry insertion/deviate from structure in process directly affects the cyclical stability of material, and doped chemical and changes of contents thereof affect its structure.Doping as Al can improve LiCoO
2specific capacity, but Li (Al
yco
1-y) 0
2the enthalpy of formation be on the occasion of, easily resolve into LiCoO
2+ LiAl0
2, cause cycle performance to reduce.
Summary of the invention
The object of this invention is to provide a kind of current discharge properties good, the method for preparing anode material of lithium-ion battery had extended cycle life.
The present invention is achieved by the following technical programs: a kind of method for preparing anode material of lithium-ion battery, by battery-grade cobaltosic oxide, superfine zirconia, superfine titanic oxide, battery-level lithium carbonate mixes by Li:Co:Zr:Ti atomic ratio 100:90:3:7, by ratio of grinding media to material 3:1, compound is put into ball grinder again, 100 mesh sieves are crossed after ball milling 1h in the planetary ball mill of 500r/min, screenings puts into 1000ml beaker, absolute ethyl alcohol is added by liquid-solid ratio 2:1, add a small amount of polyethylene glycol (mean molecule quantity 6000) again, stir 2h post-drying, mixture is put into corundum and is burnt alms bowl, 900 DEG C of reaction 12h in Muffle furnace, take out after being down to room temperature with stove, broken, 100 mesh sieves are crossed after ball milling 1h, screenings is collected and is carried out air-flow crushing, lithium ion cell positive material is obtained after pulverizing.
The present invention has following beneficial effect:
Positive electrode LiCo prepared by the present invention
0.9zr
0.03ti
0.070
2with LiCo0
2equally there are six side's layer structures, under 0.2C multiplying power, the initial discharge capacity of material reaches 147mAh/g, under 2C multiplying power, initial discharge capacity reaches 140.5mAh/g, 3.6V discharge platform ratio reaches 89.6%, capacity attenuation 7.5% after 500 circulations, the positive electrode good heavy current of preparation, has extended cycle life.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described.
Specific embodiment: positive electrode preparation process of the present invention: by battery-grade cobaltosic oxide, superfine zirconia, superfine titanic oxide, battery-level lithium carbonate mixes by Li:Co:Zr:Ti atomic ratio 100:90:3:7, by ratio of grinding media to material 3:1, compound is put into ball grinder again, 100 mesh sieves are crossed after ball milling 1h in the planetary ball mill of 500r/min, screenings puts into 1000ml beaker, absolute ethyl alcohol is added by liquid-solid ratio 2:1, add a small amount of polyethylene glycol (mean molecule quantity 6000) again, stir 2h post-drying, mixture is put into corundum and is burnt alms bowl, 900 DEG C of reaction 12h in Muffle furnace, take out after being down to room temperature with stove, broken, 100 mesh sieves are crossed after ball milling 1h, screenings is collected and is carried out air-flow crushing, lithium ion cell positive material is obtained after pulverizing.Carry out X-ray diffraction to it to draw, the positive electrode LiCo of preparation
0.9zr
0.03ti
0.070
2with LiCo0
2equally there are six side's layer structures.
Gained positive electrode and PVDF, conductive black, NMP Homogeneous phase mixing, activity substance content 94%, obtains based lithium-ion battery positive plate after slurry, film-making, cut-parts; Negative material adopts Delanium, obtains anode plate for lithium ionic cell through slurry, film-making, cut-parts; On lithium ion battery production line, lithium ion battery is made after the operations such as positive/negative plate winding, dress shell, fluid injection, sealing, electrolyte is be dissolved in the LiPF6 solution that volume ratio is the EC/DEC mixed solvent of 1:1, concentration is 1.Omol/L, and barrier film adopts Celgard2300PP/PE/PP film; BTS type high accuracy battery test macro carries out charge-discharge test at (20 scholar 1) DEG C temperature.Battery adopts constant current/constant voltage mode to charge, constant-current discharge, and voltage range is 4.2 ~ 2.75V, respectively with 0.2,2C carries out discharge and recharge to battery; 1C discharge and recharge is adopted to carry out cycle performance test 500 times.
Under 0.2C multiplying power, the initial discharge capacity of material reaches 147mAh/g, under 2C multiplying power, initial discharge capacity reaches 140.5mAh/g, 3.6V discharge platform ratio reaches 89.6%, capacity attenuation 7.5% after 500 circulations, the positive electrode good heavy current of preparation, has extended cycle life.
Above content is the further description done the present invention in conjunction with concrete execution mode, can not assert that specific embodiment of the invention is confined to these explanations.For general technical staff of the technical field of the invention, without departing from the inventive concept of the premise, some simple deduction or replace can also be made, all should be considered as belonging to protection scope of the present invention.
Claims (1)
1. a method for preparing anode material of lithium-ion battery, it is characterized in that: by battery-grade cobaltosic oxide, superfine zirconia, superfine titanic oxide, battery-level lithium carbonate mixes by Li:Co:Zr:Ti atomic ratio 100:90:3:7, by ratio of grinding media to material 3:1, compound is put into ball grinder again, 100 mesh sieves are crossed after ball milling 1h in the planetary ball mill of 500r/min, screenings puts into 1000ml beaker, absolute ethyl alcohol is added by liquid-solid ratio 2:1, add a small amount of polyethylene glycol (mean molecule quantity 6000) again, stir 2h post-drying, mixture is put into corundum and is burnt alms bowl, 900 DEG C of reaction 12h in Muffle furnace, take out after being down to room temperature with stove, broken, 100 mesh sieves are crossed after ball milling 1h, screenings is collected and is carried out air-flow crushing, lithium ion cell positive material is obtained after pulverizing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746022.2A CN104659335A (en) | 2014-12-09 | 2014-12-09 | Preparation method for lithium ion battery positive electrode material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410746022.2A CN104659335A (en) | 2014-12-09 | 2014-12-09 | Preparation method for lithium ion battery positive electrode material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104659335A true CN104659335A (en) | 2015-05-27 |
Family
ID=53250214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410746022.2A Pending CN104659335A (en) | 2014-12-09 | 2014-12-09 | Preparation method for lithium ion battery positive electrode material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104659335A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410157A (en) * | 2016-11-08 | 2017-02-15 | 桑顿新能源科技有限公司 | High-magnification long-service-life anode material and preparation method thereof |
| CN107845802A (en) * | 2017-11-22 | 2018-03-27 | 江门市科恒实业股份有限公司 | A kind of conducting polymer for lithium battery coats cobalt acid lithium and preparation method thereof |
-
2014
- 2014-12-09 CN CN201410746022.2A patent/CN104659335A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106410157A (en) * | 2016-11-08 | 2017-02-15 | 桑顿新能源科技有限公司 | High-magnification long-service-life anode material and preparation method thereof |
| CN107845802A (en) * | 2017-11-22 | 2018-03-27 | 江门市科恒实业股份有限公司 | A kind of conducting polymer for lithium battery coats cobalt acid lithium and preparation method thereof |
| CN107845802B (en) * | 2017-11-22 | 2018-10-19 | 江门市科恒实业股份有限公司 | A kind of conducting polymer for lithium battery coats cobalt acid lithium and preparation method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150527 |
|
| WD01 | Invention patent application deemed withdrawn after publication |