WO2010043154A1 - 一种镍钴锰多元掺杂锂离子电池正极材料及其制备方法 - Google Patents
一种镍钴锰多元掺杂锂离子电池正极材料及其制备方法 Download PDFInfo
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- WO2010043154A1 WO2010043154A1 PCT/CN2009/074301 CN2009074301W WO2010043154A1 WO 2010043154 A1 WO2010043154 A1 WO 2010043154A1 CN 2009074301 W CN2009074301 W CN 2009074301W WO 2010043154 A1 WO2010043154 A1 WO 2010043154A1
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- cobalt
- nickel
- manganese
- ion battery
- lithium ion
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M4/00—Electrodes
- H01M4/02—Electrodes composed of, or comprising, active material
- H01M4/36—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
- H01M4/50—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese
- H01M4/505—Selection of substances as active materials, active masses, active liquids of inorganic oxides or hydroxides of manganese of mixed oxides or hydroxides containing manganese for inserting or intercalating light metals, e.g. LiMn2O4 or LiMn2OxFy
-
- 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
Definitions
- the invention discloses a nickel-cobalt-manganese multi-doped lithium ion battery cathode material and a preparation method thereof, and belongs to the technical field of energy materials.
- the cathode material of lithium ion batteries used in mobile phones and notebook computers is lithium cobaltate.
- Lithium cobaltate has an initial discharge capacity of 140 to 145 mAh/g and has good cycle performance. It has been widely used as a positive electrode material for lithium ion batteries since 1992.
- lithium cobalt oxide materials are expensive, and there are also defects such as low capacity and poor safety performance.
- the preparation of cathode materials such as lithium manganate and lithium nickelate has been extensively studied in recent years. Lithium manganate has a low capacity, and its cycle performance, especially high temperature cycle performance, is poor, which limits its application.
- Lithium nickelate is difficult to synthesize and is still in the experimental stage.
- Nickel-cobalt-manganese lithium multi-component cathode material (hereinafter referred to as multi-element cathode material) is a new type of high-capacity lithium ion battery cathode material.
- the material has good safety performance, relatively low price, good compatibility with electrolyte, and excellent cycle performance. .
- the synthesis of the material is difficult, the material produced is less stable, and the density of the material is lower than that of lithium cobaltate, which hinders the practical application of the material.
- Multi-component cathode materials with polycrystalline particles (mostly spheroidal) have been developed.
- the single particles of the multi-element cathode material are observed under the microscope. a plurality of aggregated particles (or binding) is made, a tap density of the positive electrode material up to a polyhydric 2. 0 ⁇ 2. 5g / cm 3, initial discharge capacity 140 ⁇ 145mAh / g 0 at home and abroad manufacturers lithium ion battery positive electrode material
- the lithium-cobalt-manganese-lithium multi-component positive electrode material, which is trial-produced, is developed and has a shape of a composite crystal.
- the preparation process of lithium nickel cobalt manganate multi-component cathode material with complex crystal particles is complicated, and the prepared composite crystal lithium nickel cobalt manganate multi-electrode cathode material has high tap density, and its compaction density can reach 3 2 ⁇ 3. 4 g/cm 3 , but it is difficult to improve. And the composite crystal particles formed by combining a plurality of particles are difficult to be uniform in particle size, and the particle size distribution is wide. In the process of preparing the battery pole piece, some fine particles are easily detached from the surface of the polycrystalline particles, and the stability of the product is poor. And the spheroidal compound particles have greater hygroscopicity and are easily absorbed by moisture when exposed to air, which affects the performance of the product. Summary of the invention
- the object of the present invention is to overcome the above-mentioned deficiencies in the prior art and to provide a nickel-cobalt-manganese multi-doped lithium ion battery cathode material having a high compaction density, a low hygroscopicity, and a more stable structure.
- Another object of the present invention is to provide a method for preparing the nickel-cobalt-manganese multi-doped lithium ion battery positive electrode material.
- the present invention provides the following technical solutions:
- a nickel-cobalt-manganese multi-doped lithium ion battery cathode material having a chemical formula of LiNixCoy Mn Z M (1 - x - y - z) 0 2 , wherein M is molybdenum, chromium, bismuth, indium, antimony, bismuth, magnesium Or one or more of the rare earth elements, the range of values of x, y, and z is: 0. 3 ⁇ x ⁇ 0. 4, 0. 29 ⁇ y ⁇ 0. 35, 0. 3 ⁇ z ⁇ 0. 4. 5-30 ⁇ ⁇ The granules of the non-agglomerated single crystal grains having a particle size of 0. 5-30 ⁇ ⁇ .
- the total amount of nickel-cobalt-manganese is 0. 13-0. 3%.
- the mass fraction of cerium is the molar mass fraction of other doping metal elements other than nickel-cobalt-manganese in the total metal element of the positive electrode material of the battery of the present invention.
- the preparation method of the above nickel-cobalt-manganese lithium battery positive electrode material comprises the following steps:
- the nickel, cobalt, manganese sulfate or nitrate is formulated into an aqueous solution, and one or more of molybdenum, chromium, bismuth, indium, antimony, bismuth, magnesium or a rare earth element salt is added to the solution, and stirred and dissolved. 5) ⁇
- the content of the total amount of the total mass of the nickel, cobalt and manganese elements is 0. 13-0. 3%;
- the mixed alkaline The molar concentration of the NaOH is 0. 02-0. 9mol / L, the molar concentration of ammonia is 0. 01-0. 9mol / L, the amount of alkaline solution is calculated according to the chemical reaction formula The theoretical amount of 1. 04-1. 07 times; the oxalate solution is a molar concentration of 0. 8-1. 2mol / L of ammonium oxalate or sodium oxalate solution, the amount of oxalate is calculated according to the chemical reaction formula The theoretical amount of 1. 05-1. 1 times;
- the mixture is stirred for l_2h, aged (that is, allowed to stand) l-4h, filtered to obtain a solid matter, and the solid matter is washed with deionized water.
- the amount of washing water is 7-13 times the weight of the intermediate, so that the solid matter after washing is obtained.
- the mass percentage of the medium Na element is less than 0.01%, and the washed solid matter is dried at 105-12 CTC for 3-5 hours to obtain a nickel-cobalt-manganese multi-component intermediate.
- the molar ratio of Li: (Ni+Co+Mn) 1. 05-1.
- the above 400 mesh sieve is placed in a ceramic dish, placed in a baking furnace, calcined at a temperature of 700-80 CTC for 5-8 h, taken out, cooled to 45-55 ° C, pulverized, passed through a 400 mesh sieve.
- the obtained undersize material is a non-agglomerated single crystal multi-component positive electrode material.
- the non-agglomerated single-grain multi-element positive electrode material may have a shape of a square, a rectangle, a rhombus or an irregular polygon.
- the preparation method of the nickel-cobalt-manganese multi-doped lithium ion battery cathode material of the invention has the advantages of easier operation control and the like compared with the prior art method.
- the addition of polyethylene glycol 6000 to the process can provide a good dispersion effect.
- the addition of polyvinyl alcohol facilitates the press forming of the material.
- the nickel-cobalt-manganese multi-doped lithium ion battery cathode material prepared by the invention has a shape of non-agglomerated single crystal grains having a particle diameter of 0.5 to 30 ⁇ ⁇ , and the cathode material has a high compaction density.
- the invention breaks the fixed format of long-term imprisonment in people's minds, overcomes the above-mentioned constraints on the crystal structure, and develops a nickel-cobalt-manganese multi-doped which is more stable than the polycrystalline particles and has a non-agglomerated single crystal grain.
- a lithium ion battery cathode material which has a high compaction density (3.4 g/cm 3 ), low hygroscopicity, and a first discharge capacity of 145 to 152 mAh/g, and has excellent cycle performance and higher. Security performance.
- Figure 1 is a process flow diagram of the method of the present invention.
- Example 3 is a scanning electron microscope topography of a positive electrode material of a nickel-cobalt-manganese multi-doped lithium ion battery according to the present invention. detailed description Example 1
- Ni: Co: Mn 0.9: 1: 0.9, content of lanthanum, cerium, lanthanum It is 0.136% of the total mass of nickel-cobalt-manganese.
- the above multi-metal salt solution was heated to about 70. C, 1.2L multi-metal salt solution is added to a temperature of about 45 ° C at a rate of 5 ⁇ : LOmL / min, containing 1.7g of polyethylene glycol 6000 (polyethylene glycol 6000 is the total amount of nickel cobalt manganese metal 1.44%) of 2 liters of alkaline solution (the NH 3 content of the alkaline solution is 0.73 mol / L, Na0H content of 0.73 mol / L), then add 58.4g of NaOH to the reactor, and add under stirring
- the remaining multi-metal salt solution was stirred for 1 hour after the addition, and then allowed to stand for 4 hours, filtered to obtain a solid matter, and the solid matter was washed with 2 liters of pure water to make the mass percentage of sodium element in the solid content ⁇ 0.01%. Then, the washed solid matter was dried in an oven at 115 ° C for 5 hours to obtain 189.9 g
- the obtained nickel-cobalt-manganese multi-component intermediate was mixed with 89.6 g of LiOHH*H 2 0, ground for 2 h, pretreated at 520 ° C for 2 h, and the mixture was uniformly mixed with 2.3 g of polyvinyl alcohol and pressed into a cake. (The amount of polyvinyl alcohol used is 1.95% of the total mass of nickel-cobalt-manganese).
- the cake was placed in a baking furnace, calcined at 82 CTC for 16 hours, then heated to 93 CTC and calcined for 6 hours, baked, cooled to about 50 ° C, pulverized, and passed through a 400 mesh sieve.
- the undersize is placed in a ceramic dish, placed in a baking furnace, calcined at 800 for 5 hours, baked, cooled to 50 ° C, pulverized, passed through a 400 mesh sieve, and packaged under a sieve to obtain a non-agglomerated single-grain layer.
- the structure of nickel-cobalt-manganese multi-doped lithium ion battery cathode material 192g.
- the multi-component positive electrode material having a non-agglomerated single crystal grain and a layered structure has a particle diameter of 0.5 to 15 ⁇ m and a compact density of 3.4 g/cm 3 .
- the multi-component positive electrode material is mixed, dried, pressed, formed, weighed, assembled, and sealed to form a battery.
- the positive electrode coating film of the battery is: PVDF 3.5%, multi-component positive electrode material 93.6%, conductive carbon black 2.9%; Negative film coating formula: PVDF 6.5%, artificial graphite, 93.5%, positive and negative pole piece area 7cm 2 .
- PCBT-138-4D battery produced by Wuhan Lixing Testing Equipment Co., Ltd. 5% ⁇ The battery has a capacity of 149.
- the existing polycrystalline particle positive electrode material was made into a battery in the same proportion, and tested under the same conditions, and its initial discharge capacity was 142 mAh/go.
- the solution was heated to about 60 ° C, and a 1 L multi-metal salt solution was added to a 2 liter alkaline solution containing 1. lg of polyethylene glycol 6000 at a rate of 6 to 9 mL/min (the amount of polyethylene glycol 6000).
- the amount of the nickel-cobalt-manganese metal is 0.92%, the alkaline solution (temperature is about 45 °C), the NH 3 content is 0. 73 mol / L, the NaOH content is 0. 73 mol / L, stirring reaction 2 5 ⁇ , Then add NaOH 58. 6g to the reactor, continue to add the remaining multi-metal salt solution under stirring to carry out the reaction.
- the polyhydric intermediate is mixed with 92. lgLi0H * H 2 0, fully ground, pretreated at 500 ° C for 2 hours, and then the above pretreated material and 1.8 g of polyvinyl alcohol (the amount of polyvinyl alcohol is nickel cobalt manganese 1.5% of the total mass is uniformly mixed and pressed into a block.
- the block is then placed in a baking furnace, calcined at 800 ° C for 15 h, then heated to 900 ° C for 7 h, baked, cooled to 45 ° C, crushed, passed through a 400 mesh sieve.
- the undersize is placed in a ceramic dish, calcined in a roaster at 70 CTC for 7 hours, baked, cooled to about 45 ° C, pulverized, sieved, and packaged to obtain a multi-positive non-agglomerated single-grain, layered structure.
- the first discharge capacity is 150. 3 mAh / g, cycle charge and discharge, the first embodiment has a particle size of 0. 7- 12 um, a compact density of 3.45 g / cm 3 , a first discharge capacity of 150. 3 mAh / g, cycle charge and discharge 55% ⁇ Its capacity decay is only 1. 5 %.
- Example 3 207.5 g of nickel sulfate (the weight percentage of Ni element is 21.2%), 179.0 g of cobalt sulfate (weight ratio of Co ⁇ is 20.56%), and 127.6 g of manganese sulfate (32.2% by weight of Mn element) are dissolved. In 1.3 liters of pure water, dissolved, filtered, and then added to the filtrate, cerium nitrate (containing La element 0.
- the above materials were uniformly mixed with 1.2 g of polyvinyl alcohol (the amount of polyvinyl alcohol used was 0.98% of the total mass of nickel, cobalt and manganese), and pressed into a cake.
- the block was placed in a baking furnace, calcined at 800 ° C for 10 h, heated to 900 ° C for 6 h, and baked, pulverized, and passed through a 400 mesh sieve.
- the undersize is placed in a ceramic dish, calcined at 700 ° C for 8 h, baked, cooled to about 55 ° C, pulverized, sieved through 400 mesh, and packaged under the sieve to obtain a non-agglomerated single crystal grain, layered structure.
- Multi-component positive electrode material (199.5 g) 0
- the direct recovery rates of Ni, Co, and Mn in this example were 97.5%, respectively.
- the multi-component positive electrode material having a non-agglomerated single-grain layered structure has a particle diameter of 0.8 to 16 ⁇ m, a compact density of 3.4 g/cm 3 , and an initial discharge capacity of 149.9 mAh/g (4.2 V) and 176 mAh/g ( 4.5V), 100 times of cyclic charge and discharge, its capacitance decay is only 2.1%.
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- Inorganic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Battery Electrode And Active Subsutance (AREA)
- Secondary Cells (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
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Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
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US13/124,664 US8709301B2 (en) | 2008-10-17 | 2009-09-29 | Ni-, Co-, and Mn- multi-element doped positive electrode material for lithium battery and its preparation method |
JP2011531336A JP5702289B2 (ja) | 2008-10-17 | 2009-09-29 | ニッケル・コバルト・マンガン系多元素ドーピングしたリチウムイオン電池用正極材料の製造方法 |
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CN200810046300.8 | 2008-10-17 | ||
CN2008100463008A CN101626080B (zh) | 2008-10-17 | 2008-10-17 | 一种镍钴锰多元掺杂锂离子电池正极材料及其制备方法 |
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US (1) | US8709301B2 (zh) |
JP (1) | JP5702289B2 (zh) |
KR (1) | KR101604509B1 (zh) |
CN (1) | CN101626080B (zh) |
WO (1) | WO2010043154A1 (zh) |
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CN101626080B (zh) | 2011-02-09 |
JP5702289B2 (ja) | 2015-04-15 |
KR101604509B1 (ko) | 2016-03-25 |
US20110226986A1 (en) | 2011-09-22 |
JP2012506110A (ja) | 2012-03-08 |
US8709301B2 (en) | 2014-04-29 |
KR20110086817A (ko) | 2011-08-01 |
CN101626080A (zh) | 2010-01-13 |
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