KR101335430B1 - Manufacturing method of positive electrode materials for Lithium secondary battery using spherical cobalt hydroxide - Google Patents

Abstract

The present invention relates to a method for producing a positive electrode material for a non-aqueous lithium secondary battery using a spherical cobalt hydroxide, by using a precipitation reaction in the liquid phase to produce a spherical cobalt hydroxide in which dissimilar metal is uniformly substituted for the final positive electrode material It is to suppress the collapse of the structure at high voltage to improve the life characteristics. According to the present invention, cobalt raw materials, hydroxyl raw materials, dissimilar metal raw materials and amine-based raw materials are represented by the formula, Co _1-x M _x (OH) ₂ (0.00 <x≤0.10, M = Al, Mg, Ti, etc) It is possible to prepare spherical cobalt hydroxide having a particle size of 15 ~ 30㎛ by precipitating to have a composition ratio of. And it is possible to prepare a spherical cobalt oxide having a particle size of 10 to 25㎛ by maintaining the prepared cobalt hydroxide in the temperature range of 500 ~ 800 ℃ 5-20 hours. The cathode material manufactured using such cobalt oxide shows excellent life characteristics even under 4.5V high voltage charge / discharge conditions.

Description

Manufacturing method of positive electrode materials for Lithium secondary battery using spherical cobalt hydroxide}

The present invention relates to a method of manufacturing a cathode material for a non-aqueous lithium secondary battery, and more particularly, using spherical cobalt hydroxide which can minimize side reactions with electrolytes even when used at high voltage due to its high sphericity using a functional complexing agent. It relates to a method for producing a cathode material for a non-aqueous lithium secondary battery used.

2. Description of the Related Art With the spread of portable electric and electronic devices, development of a new secondary battery such as a nickel metal hydride battery or a lithium secondary battery is actively under way. Among them, the lithium secondary battery is a battery using carbon such as graphite as an anode active material, using an oxide containing lithium as a cathode active material, and using a non-aqueous solvent as an electrolyte. Since lithium is a metal having a very high ionization tendency, development of a battery having a high energy density is possible because high voltage can be expressed.

Lithium transition metal oxides containing lithium are mainly used as the positive electrode active material used therein, and more than 90% of layered lithium transition metal oxides such as cobalt, nickel, and ternary systems in which cobalt, nickel, and manganese coexist are used have.

However, the layered lithium transition metal oxide, which is widely used as a cathode active material, has cobalt ions eluted for side reactions with electrolytes in non-ideal states (overcharge and high temperature), or a non-reversible resistive layer is formed on the surface to reduce capacity and reduce output. To overcome the disadvantages of the layered lithium metal oxide and to minimize the specific surface area from the precursor manufacturing step to use it for a longer time, studies to suppress side reactions with the electrolyte are ongoing. It is becoming.

Japanese Patent Publication No. 4240242 (2009.03.18.)

In order to solve this problem, an anode material having a large particle size was attempted to minimize the side reaction with the electrolyte and improve the life characteristics.However, when the particles are coarsened, the growth is promoted to a plate shape and the specific surface area is increased. There was a disadvantage that this did not become smaller effectively.

Accordingly, an object of the present invention is to provide a method for producing a cathode material for a non-aqueous lithium secondary battery using a spherical cobalt hydroxide having a particle size of 15 ㎛ or more so as to realize a high energy density and improved life characteristics.

Another object of the present invention is a method for producing a cathode material for a non-aqueous lithium secondary battery using a spherical cobalt hydroxide having an excellent sphericity degree and internal density of cobalt hydroxide prepared by adding a functional complexing agent in a liquid phase in a cobalt oxide manufacturing process. To provide.

In order to achieve the above object, the present invention is a cobalt hydroxide manufacturing step of producing a spherical cobalt hydroxide by coprecipitating an aqueous solution mixed with cobalt raw material, hydroxyl raw material, dissimilar metal raw material and amine-based raw material, and heat treatment the cobalt hydroxide It provides a method for producing a cathode material for a non-aqueous lithium secondary battery comprising the step of producing cobalt oxide to manufacture a spherical cobalt oxide substituted with a dissimilar metal.

In the method for manufacturing a cathode material for a non-aqueous lithium secondary battery according to the present invention, the cobalt hydroxide in the cobalt hydroxide manufacturing step, Co _1-x M _x (OH) ₂ (0.00 <x≤0.10, M = Al, Mg Or Ti), and the average particle size may be 15 ~ 30㎛.

In the method for producing a cathode material for a non-aqueous lithium secondary battery according to the present invention, in the cobalt hydroxide manufacturing step, the concentration of cobalt raw material, hydroxide raw material, dissimilar metal raw material and ethylenediamine raw material is 0.5 ~ 2M, respectively, cobalt raw material Hydroxide raw material, dissimilar metal raw material and ethylenediamine raw material may be co-precipitated at a molar ratio of 1: 1.8 to 2.5: 0 to 0.1: 0.05 to 0.50, but the pH of the mixed aqueous solution may be maintained at 10 to 12.

In the method of manufacturing a cathode material for a non-aqueous lithium secondary battery according to the present invention, in the cobalt oxide manufacturing step, the cobalt oxide is Co _3-y M _y O ₄ (0.00 < _y ≦ 0.30, M = Al, Mg or Ti) ) And the average particle size may be 10 ~ 25㎛.

In the method for producing a cathode material for a non-aqueous lithium secondary battery according to the present invention, a lithium cobalt carbonate manufacturing step of producing lithium cobalt oxide by mixing lithium carbonate with the cobalt oxide, which is performed after the cobalt oxide manufacturing step, followed by heat treatment It may further include.

In the method for producing a cathode material for a non-aqueous lithium secondary battery according to the present invention, the heat treatment in the cobalt oxide manufacturing step is performed at 500 ~ 800 ℃, the heat treatment in the lithium cobalt oxide manufacturing step is carried out at 900 ~ 1100 ℃. can do.

In the method for manufacturing a cathode material for a non-aqueous lithium secondary battery according to the present invention, the method may further include pulverizing and powdering the lithium cobaltate, which is performed after the lithium cobalt production step.

In addition, the present invention also has a composition ratio of LiCo _1-y M _y O ₂ (0.00 < _y ≦ 0.10, M = Al, Mg or Ti), the spherical high density of the spherical nonaqueous lithium secondary battery having an average particle size of 15 to 25㎛. Provide anode material.

According to the present invention, cobalt hydroxide having a high density of cobalt hydroxide having a high degree of sphericity and a high degree of spherical formation through coprecipitation process using a functional complexing agent containing an amine-based raw material, and cobalt oxide through heat treatment thereof, Lithium cobalt is produced in a form in which heterogeneous elements are uniformly substituted to have a high degree of sphericity. Thus, the cathode material thus prepared has a capacity of 80% or more of the initial capacity even after 50 charging and discharging even at a high temperature of 60 degrees. Expression is possible.

In addition, the cathode material according to the present invention has a high degree of sphericity, so that the specific surface area is very low, thereby significantly suppressing side reactions with the electrolyte at high temperatures.

1 is a flow chart according to a method of manufacturing a cathode material for a non-aqueous lithium secondary battery according to the present invention.
FIG. 2 is an internal shape image of spherical cobalt hydroxide which is a cathode material for a non-aqueous lithium secondary battery manufactured by the manufacturing method of Example 1 of the manufacturing method of FIG. 1.
3 is an internal shape image of spherical cobalt hydroxide which is a cathode material for a non-aqueous lithium secondary battery prepared by the manufacturing method of Comparative Example 1.
FIG. 4 is a particle shape image of a cobalt hydroxide, cobalt oxide, and lithium cobalt oxide cathode material prepared by the preparation method of Example 1. FIG.
FIG. 5 is a particle shape image of a cobalt hydroxide, cobalt oxide, and lithium cobalt oxide cathode material prepared by the preparation method of Example 2. FIG.
FIG. 6 is a graph showing charge and discharge life characteristics at a high temperature of 60 ° C. of the positive electrode material prepared by the manufacturing method of Example 1, Example 2, and Comparative Example 1. FIG.

In the following description, only parts necessary for understanding the embodiments of the present invention will be described, and the description of other parts will be omitted so as not to obscure the gist of the present invention.

The terms and words used in the present specification and claims should not be construed as limited to ordinary or dictionary meanings and the inventor is not limited to the meaning of the terms in order to describe his invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are merely preferred embodiments of the present invention, and are not intended to represent all of the technical ideas of the present invention, so that various equivalents And variations are possible.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

A method of manufacturing the cathode material for a non-aqueous lithium secondary battery according to the present invention will be described with reference to FIG. 1. 1 is a flowchart according to a method of manufacturing a cathode material for a non-aqueous lithium secondary battery according to the present invention.

Referring to FIG. 1, a method of manufacturing a cathode material for a non-aqueous lithium secondary battery according to the present invention includes a cobalt hydroxide manufacturing step (S10) and a cobalt oxide manufacturing step (S20), and a lithium cobalt sulfate manufacturing step (S30) and pulverization. Step S40 may be further included. Here, cobalt hydroxide is prepared by co-precipitating cobalt hydroxide, a hydroxide raw material, a dissimilar metal material for substitution, and an ethylene diamine raw material in the cobalt hydroxide manufacturing step (S10). Next, cobalt hydroxide is heat-treated in step S20 to produce spherical high density cobalt oxide substituted with dissimilar metals. Subsequently, lithium cobalt carbonate is prepared by mixing lithium carbonate with cobalt oxide in a step of preparing lithium cobalt (S30) and performing heat treatment. Finally, in the crushing step (S40), lithium cobalt oxide as a cathode material is pulverized and powdered.

The manufacturing method of the cathode material for a non-aqueous lithium secondary battery according to the present invention will be described in detail as follows.

First, in the cobalt hydroxide manufacturing step (S10), cobalt raw material, hydroxide raw material, dissimilar metal raw material and ethylene diamine raw material are continuously added to the coprecipitation reactor while controlling the pH so that the spherical hydroxide in which the dissimilar metal according to Formula 1 is uniformly substituted Cobalt is prepared. That is, the concentration of the above raw materials is in the range of 0.5 to 2.0M, respectively, so that the molar ratio of cobalt raw material: substitutional dissimilar metal raw material: hydroxyl raw material: amine raw material = 1: 0 and above 0.10: 1.8 to 2.5: 0.05 to 0.50 Cobalt hydroxide is prepared by controlling the reaction for 50 to 100 hours. If it is out of the above ratio, the pH will be out of the range of 10 to 12, so that uniform precipitation between cobalt and dissimilar metals does not occur, and thus independent precipitation cannot be obtained. In addition, when the reaction time is less than 50 hours, the particle formation is relatively low to produce particles of 5 μm or less, and the sphericalization of the particles is also very low.

(0.00 <x≤0.10, M = Al, Mg, Ti, etc)

At this time, the cobalt hydroxide may be prepared by precipitating to have a composition ratio of Chemical Formula 1 in step (S10) to prepare a spherical cobalt hydroxide having a particle size of 15 ~ 30㎛.

Cobalt raw materials include, but are not limited to, at least one of cobalt metal, manganese oxalate, manganese acetate, manganese nitrate, and manganese sulfate.

The dissimilar metal of the dissimilar metal raw material includes aluminum (Al), magnesium (Mg), titanium (Ti) and the like. For example, when aluminum is used as the dissimilar metal, the dissimilar metal raw material includes at least one of aluminum nitrate and aluminum chloride, but is not limited thereto.

And the amine-based raw material may be used ethylene diamine, urea (Urea), succinonitrile (Succinonitrile; SN), but is not limited thereto.

Next, spherical cobalt hydroxide is heat-treated in the step (S20) of producing cobalt oxide to prepare cobalt oxide for a cathode material according to Formula (2). At this time, the heat treatment is heat-treated in an air atmosphere at 500 ~ 800 ℃ to produce the final spherical cobalt oxide. In this case, when the heat treatment is performed at 500 ° C. or less, sufficient heat treatment may not be performed on the spherical precursor, and thus hydrogen ion may not be 100% removed. On the other hand, when the heat treatment is carried out at 800 ℃ or more, the spherical precursor is broken more than necessary reaction occurs. If the spherical shape is eliminated, the reaction rate with the lithium raw material will be lowered in the future, so that lithium cobaltate cannot be effectively produced.

(0.00 <y≤0.30, M = Al, Mg, Ti, etc)

Cobalt oxide prepared in the cobalt oxide manufacturing step (S20) is a spherical cobalt oxide having a composition ratio of the formula (2), the average particle size of 10 ~ 25㎛. Cobalt oxide according to formula (2) is a precursor for the cathode material according to the present invention finally prepared.

In addition, the cobalt oxide prepared in the lithium cobalt manufacturing step (S30) may be reacted with a lithium raw material to prepare a cathode material, which is lithium cobalt sulfate substituted with a dissimilar metal. That is, a lithium cobalt oxide positive electrode material for a non-aqueous lithium secondary battery may be manufactured by mixing a lithium raw material with the manufactured cobalt oxide and performing heat treatment.

Here, the lithium raw material includes at least one of lithium carbonate, lithium hydroxide, lithium acetate, lithium sulfate, lithium sulfite, lithium acetate, lithium fluoride, lithium chloride, lithium bromide, and lithium oxide, but is not limited thereto.

At this time, the heat treatment is carried out in the air atmosphere at 900 ~ 1100 ℃ to produce the final lithium cobaltate. In this case, when the heat treatment is performed at 900 ° C. or lower, sufficient heat treatment is not performed, and thus the usable capacity is lowered to 120 mAhg ⁻¹ or less. On the other hand, when the heat treatment is carried out at 1100 ℃ or more, the reaction occurs more than necessary to produce a large particle having a primary particle of 25㎛ or more, there is a problem that the output characteristics are lowered.

On the other hand, in order to manufacture the positive electrode plate after the lithium cobalt production step (S30), the heat treatment of the positive electrode material can be pulverized and powdered. At this time, the grinding is carried out in a conventional manner. Examples of grinding means include mortars, ball mills, vibratory mills, satellite ball mills, tube mills, rod mills, jet mills, hammer mills, and the like, and if desired, a desired particle size distribution is obtained. The average particle size of the powder of the cathode material of the present invention is preferably within the range of 15 to 25 µm.

The lithium secondary battery to which the cathode material of the present invention is applied is not different from the existing lithium secondary battery manufacturing method in terms of other than the cathode material. Although manufacturing of a positive electrode plate and a structure of a lithium secondary battery is demonstrated easily, it is not limited to these.

Production of the positive electrode plate is carried out by adding one or two or more kinds of additives which are commonly used to the powder of the positive electrode material of the present invention, if necessary, as a conductive agent, a binder, a filler, a dispersant, an ion conductive agent, a pressure enhancer, and the like. And slurry to paste with a suitable solvent (organic solvent). The slurry or paste thus obtained is applied to an electrode support substrate by a doctor plate method or the like, dried, and pressed using a rolled roll or the like as the positive electrode plate.

Examples of the conductive agent include graphite, carbon black, acetylene black, Ketjen Black, carbon fiber, metal powder and the like. PVdF, polyethylene, etc. can be used as a binder. The electrode supporting substrate (also referred to as current collector) may be formed of a foil, a sheet, or a carbon fiber, such as copper, nickel, stainless steel, or aluminum.

The lithium secondary battery is manufactured using the positive electrode thus prepared. The shape of the lithium secondary battery may be a coin, a button, a sheet, a cylindrical shape, or a square shape. Cathode materials, electrolytes, separators, etc. of lithium secondary batteries will be used in existing lithium secondary batteries.

Here, as the anode material, one or two or more kinds of carbon materials such as graphite or composite oxides of transition metals can be used. In addition, silicon, tin, and the like can also be used as a negative electrode material.

As the electrolytic solution, either a non-aqueous liquid electrolyte in which a lithium salt is dissolved in an organic solvent, an inorganic solid electrolyte, or a composite material of an inorganic solid electrolyte can be used.

Examples of the solvent of the non-aqueous liquid electrolyte include esters such as ethylene carbonate, propylene carbonate, dimethyl carbonate, diethyl carbonate and methyl ethyl carbonate, lactones such as butyl lactone, 1,2-dimethoxyethane and ethoxymethoxyethane Nitriles such as ethers and acetonitrile, or the like can be used.

Examples of the lithium salt of the non-aqueous liquid electrolyte include LiAsF ₆ , LiBF ₄ , LiPF ₆ , and the like.

The separator may be a porous film made from polyolefin such as PP and / or PE, or a porous material such as nonwoven fabric.

Examples and Comparative Examples

The cobalt oxide according to Example 1 was prepared as follows.

1.5M solution of cobalt sulfate, 1.5M solution of sodium hydroxide, 1.5M solution of aluminum nitrate, and 1.5M solution of ethylenediamine were added to the coprecipitation reactor at a rate of 20cc per hour to be 0.98: 2.05: 0.05: 0.10 A spherical cobalt hydroxide substituted with metal is prepared. The cobalt hydroxide thus prepared was maintained at 750 ° C. for 10 hours in air to prepare cobalt oxide for the cathode material according to the final example 1.

Lithium carbonate was co-dried to cobalt oxide so that the ratio of lithium ions to cobalt ions was 1.05, and maintained in air at 950 ° C. for 15 hours to prepare a cathode material according to Example 1.

The powder of the positive electrode material according to Example 1 was classified so as to have an average particle diameter of 15 to 25 µm. A slurry was prepared using 94 wt% of the cathode material, 3 wt% of acetylene black as the conductive agent, and 3 wt% of PVdF of the binder, using NMP as a solvent. The slurry was applied to an Al foil having a thickness of 20 μm, dried, compacted by a press, and dried for 16 hours at 120 ° C. in a vacuum to prepare an electrode with a disc of 16 mm in diameter.

A lithium metal foil punched to a diameter of 16 mm was used as the counter electrode, and a PP film was used as the separator. As an electrolyte solution, a mixed solution of EC / DME 1: 1 v / v of 1M LiPF ₆ was used. After the electrolyte solution was impregnated with the separator, the separator was sandwiched between the working electrode and the counter electrode, and the case of the SUS product was evaluated as a test cell for electrode evaluation.

Cathode materials according to Examples 2, 3, Comparative Example 1 and Comparative Example 2 were prepared under the conditions as described in Table 1.

sample
ID Input Raw Material (1.5M) Particle shape 4.5V 60 ℃
Life characteristics
(50 charges / discharges)
[%] Remarks Co raw material Substituent NaOH Ethylene
Diamine ammonia One 0.98 0.02 2.05 0.05 0.00 Spherical, dense 84 Example 2 2 0.98 0.02 2.05 0.10 0.00 Spherical, high density 93 Example 1 3 0.98 0.02 1.95 0.20 0.00 Spherical, coarse 80 Example 3 4 0.98 0.02 1.95 0.50 0.00 Aspheric 70 Comparative Example 2 5 0.95 0.05 2.05 0.00 0.50 Spherical, porous 77 Comparative Example 1

Looking at the internal shape of the positive electrode material prepared according to Example 1, it is as shown in FIG. FIG. 2 is an internal shape image of cobalt hydroxide which is a precursor for a cathode material for a non-aqueous lithium secondary battery manufactured by the manufacturing method of Example 1 of the manufacturing method of FIG. 1. It is an image which enlarged the internal shape of cobalt hydroxide as it goes from (a) to (c) of FIG.

Referring to Figure 2, it has a very high spherical degree, it is made of a relatively high density, it is possible to manufacture a high-density cathode material when the reaction by heat treatment with lithium carbonate for the final anode material manufacturing in the future. This high degree of sphericity can minimize the specific surface area, and can provide chemical stability to the cathode material even under high temperature charge and discharge conditions of 60 ° C., thereby exhibiting excellent life characteristics. And the particle shape of the cobalt hydroxide, cobalt oxide and lithium cobalt oxide cathode material prepared by the manufacturing method of Example 1 is shown in FIG. (D) in FIG. 4 is an enlarged image of (c).

On the other hand, when looking at the internal shape of the cathode material prepared according to Comparative Example 1, it is as shown in FIG. FIG. 3 is an internal shape image of cobalt hydroxide which is a precursor for a cathode material for a non-aqueous lithium secondary battery manufactured by the manufacturing method of Comparative Example 1. FIG. Since it has a spherical porosity, it is easy to diffuse lithium species into the cobalt oxide when the reaction is performed by heat treatment with lithium carbonate to manufacture the final anode material in the future. However, Comparative Example 1 is less dense and sphericity than Example 1.

Particle shape images of the cobalt hydroxide, cobalt oxide, and lithium cobalt oxide cathode materials prepared by the production method of Example 2 are shown in FIG. 5. Example 2 is slightly lower in density than in Example 1, but compared to Comparative Example 1, it can be seen that the density and the degree of sphericity are improved. (D) in FIG. 5 is an enlarged image of (c).

And the cathode material manufactured by the manufacturing method of Example 3 can be confirmed that the density and sphericity degree improved compared to Comparative Example 1 as disclosed in Table 1.

Therefore, lithium cobalt oxide prepared from cobalt hydroxide prepared by the preparation method according to Example 1 has a high sphericity of 15 to 20 μm, resulting in a capacity expression of 80% or more of the initial capacity even after 50 charge / discharge cycles at a high temperature of 60 ° C. It becomes possible. In other words, the performance improvement of the cathode material is achieved by optimally controlling the process conditions using the coprecipitation reactor in the liquid phase and using a higher level of functional complexing agents such as amine-based materials such as ethylenediamine, compared to the existing ammonia water, and the content thereof. This is because cobalt hydroxide and cobalt oxide having high density and high sphericity can be prepared by optimizing.

And the charge and discharge output characteristics at room temperature of the test cell for electrode evaluation with the positive electrode material prepared from cobalt hydroxide according to Example 1, Example 2 and Comparative Example 1 was measured as shown in FIG. 6 is a graph showing charge / discharge lifetime characteristics at a high temperature of 60 占 폚 of the cathode material produced by the manufacturing method of Example 1, Example 2, and Comparative Example 1. FIG.

Referring to Table 1 and FIG. 6, it can be seen that Comparative Example 1 has a severe decrease in capacity compared to the initial capacity after 50 charge / discharge cycles compared to Example 1. That is, it can be seen that the positive electrode material according to Example 1 exhibits excellent charge and discharge characteristics even at 60 ° C high temperature charge and discharge conditions, compared to the positive electrode material according to Comparative Example 1.

As described above, it can be seen that the cathode material according to Example 1 is 93% of the initial capacity after 50 charge / discharge maintenance of life characteristics at a high temperature of 60 ° C. compared with the cathode material according to Comparative Example 1. In addition, in the case of Comparative Example 1 it can be confirmed that after the 50 times the charge and discharge capacity of 77%. In addition, in the case of Example 2 it can be confirmed that after 50 charge and discharge is 84% of the initial capacity. In addition, in the case of Example 3 it can be confirmed that after the 50 times the charge and discharge 80% of the initial capacity.

That is, since the cathode material according to Example 1 was prepared from a hydroxide having a high degree of spherical density, the cathode material thus produced exhibited a capacity of 80% or more of the initial capacity even after 50 charge and discharge cycles at a high temperature of 60 ° C. You can see what's possible.

On the other hand, the embodiments disclosed in the specification and drawings are merely presented specific examples to aid understanding, and are not intended to limit the scope of the present invention. It will be apparent to those skilled in the art that other modifications based on the technical idea of the present invention are possible in addition to the embodiments disclosed herein.

Claims (8)

Cobalt hydroxide manufacturing step of co-precipitating an aqueous solution in which cobalt raw material, hydroxyl raw material, substitutional dissimilar metal raw material, and amine-based raw material are mixed to produce spherical cobalt hydroxide; And
And a cobalt oxide manufacturing step of preparing a spherical cobalt oxide substituted with a dissimilar metal by heat-treating the cobalt hydroxide.
In the cobalt hydroxide manufacturing step,
The concentrations of cobalt raw material, hydroxyl raw material, dissimilar metal raw material and amine raw material are 0.5 ~ 2M, respectively, and cobalt raw material, hydroxyl raw material, dissimilar heterometal raw material and amine raw material are 1: 1.8 ~ 2.5: over 0 ~ 0.1 : Co-precipitated at a molar ratio of 0.05 to 0.50, maintaining the pH of the mixed aqueous solution at 10-12 to prepare cobalt hydroxide,
The cobalt hydroxide has a composition ratio of Co _1-x M _x (OH) ₂ (0.00 < _x ≦ 0.10, M = Al, Mg or Ti), and the non-aqueous lithium having an average particle size of 15 to 30 μm. Method for producing a cathode material for a secondary battery. The method of claim 1,
The dissimilar metal raw material for the production of a positive electrode material for a non-aqueous lithium secondary battery, characterized in that it comprises at least one of aluminum nitrate, aluminum chloride. According to claim 1, In the cobalt hydroxide manufacturing step,
The amine-based raw material is ethylenediamine, urea (Urea) or succinonitrile (Succinonitrile; SN) method for producing a cathode material for a non-aqueous lithium secondary battery, characterized in that. According to claim 1, In the cobalt oxide manufacturing step,
The cobalt oxide,
A method for producing a cathode material for a non-aqueous lithium secondary battery, having a composition ratio of Co _3-y M _y O ₄ (0.00 < _y ≦ 0.30, M = Al, Mg, or Ti), and having an average particle size of 10 to 25 μm. . According to claim 1, which is performed after the cobalt oxide production step,
A lithium cobalt production step of mixing lithium carbonate with cobalt oxide and then heat treating to produce lithium cobalt oxide;
Method for producing a positive electrode material for a non-aqueous lithium secondary battery, characterized in that it further comprises. The method of claim 5,
The heat treatment in the cobalt oxide manufacturing step is carried out at 500 ~ 800 ℃,
The method of manufacturing a cathode material for a non-aqueous lithium secondary battery, characterized in that the heat treatment in the lithium cobaltate manufacturing step is carried out at 900 ~ 1100 ℃. The method according to claim 6, which is carried out after the step of preparing lithium cobalt acid,
Pulverizing and grinding the lithium cobaltate;
Method for producing a positive electrode material for a non-aqueous lithium secondary battery, characterized in that it further comprises. delete

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