High specific surface area high nickel ternary precursor oxide, method for preparing same and use thereof

Abstract

The application belongs to the technical field of lithium ion battery ternary precursors, and particularly relates to a high specific surface area high-nickel ternary precursor oxide as well as a preparation method and application thereof. The high specific surface area high-nickel ternary precursor oxide prepared by the method has a larger specific surface area, which can reach 180.19 m 2 / g, a high tap density, and loose and porous particles, and has high overall consistency, and can effectively improve the electrochemical performance of the positive electrode material when the positive electrode material is prepared. By adjusting the temperature and time of the calcination process, the application effectively reduces the moisture and organic impurity content, improves the sphericity of the later forming, effectively adjusts the half-peak of the ternary precursor oxide, and controls the specific surface area. By oxidizing the loose and porous high-nickel ternary precursor hydroxide, the structure of the ternary precursor oxide prepared is more stable, and the advantage is greater in the preparation of the subsequent ternary positive electrode material.

Description

Technical Field

[0001] This invention belongs to the field of lithium-ion battery ternary precursor technology, specifically relating to a high specific surface area, high nickel ternary precursor oxide, its preparation method, and its application. Background Technology

[0002] In lithium-ion batteries, ternary nickel-cobalt-manganese cathode materials are generally prepared by calcining lithium salts and nickel-cobalt-manganese ternary precursor hydroxides. The precursor is crucial to the production of ternary materials because its quality, such as morphology, particle size, particle size distribution, specific surface area, impurity content, and tap density, directly determines the physicochemical properties of the final sintered product and affects its electrochemical performance. It is widely recognized in the industry that 60% of the technological content of ternary materials lies in the precursor. Pre-oxidizing the ternary precursor hydroxide to a ternary precursor oxide can eliminate original defects, adjust the composition of the ternary precursor, and improve the performance of the final battery.

[0003] Currently, the main industrial method for preparing ternary precursors is liquid-phase co-precipitation: a nickel-cobalt-manganese salt solution, precipitant, and complexing agent are injected into a reaction vessel in a specific ratio, reacted under controlled conditions, and then washed and dried to obtain nickel-cobalt-manganese hydroxide. Oxidation involves calcining the ternary precursor hydroxide in an atmosphere furnace. Three key factors exist during calcination: calcination time, calcination temperature, and calcination atmosphere. Calcination temperature and time are the most important, affecting various physicochemical properties of the ternary precursor, including BET and moisture content. Too low a calcination temperature results in incomplete conversion of the hydroxide to oxides, while too high a temperature leads to over-calcination. In existing technologies, to ensure complete conversion of the hydroxide raw material to oxides and avoid waste, higher calcination temperatures and longer calcination times are typically used. The BET of ternary precursors prepared using conventional calcination methods in existing technologies is usually only 65 mg / L. 2 The calcination process limits the improvement of BET in ternary precursors to approximately / g. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention provides a high specific surface area, high-nickel ternary precursor oxide, its preparation method, and its application, specifically including the following:

[0005] A method for preparing a high-specific-surface-area, high-nickel ternary precursor oxide, wherein the high-nickel ternary precursor oxide is (Ni m Co n Mn 100-m-n O, where 90≤m≤98, 0<n<10; the preparation method includes the following steps:

[0006] (1) Add water, liquid alkali and ammonia to the reaction vessel, adjust the pH to 10-12.0, and obtain the reaction base liquid;

[0007] (2) Add nickel-cobalt-manganese ternary solution, liquid alkali and ammonia water to the reaction vessel, and simultaneously introduce nitrogen gas to carry out the co-precipitation reaction in the nitrogen atmosphere, and control the ammonia concentration in the reaction system to be 9-10 g / L.

[0008] (3) When the product particle D50 in the reaction system is maintained at 12-15μm, the reaction product is collected, and after aging, washing and drying, high-nickel ternary precursor hydroxide is obtained.

[0009] (4) The high-nickel ternary precursor hydroxide is added to an atmosphere furnace for heating and calcination, while argon gas is introduced. The heating rate is controlled at 2-4℃ / min, the calcination temperature is 288-292℃, and the calcination time is 4-6h, so as to finally obtain a high specific surface area high-nickel ternary precursor oxide.

[0010] Preferably, the liquid alkali in steps (1)-(2) is a sodium hydroxide solution with a concentration of 30-35 wt%; and the concentration of the ammonia water is 13-17 wt%.

[0011] Preferably, step (2) further includes using a thickener to thicken the reaction system: the reaction vessel and the thickener form a loop, and the reaction system is thickened while the co-precipitation reaction is taking place.

[0012] Preferably, the total concentration of metal ions in the nickel-cobalt-manganese ternary solution in step (2) is 100-130 g / L, wherein the molar ratio of the three elements is: nickel:cobalt:manganese = m:n:(100-mn), 90≤m<98, 0<n<10.

[0013] Preferably, in step (2): the rate of adding nickel-cobalt-manganese ternary solution to the reactor is 200-600 L / h; the rate of adding liquid alkali to the reactor is 70-200 L / h; and the rate of adding ammonia water to the reactor is 10-80 L / h.

[0014] Preferably, the nitrogen introduction rate in step (2) is 5-7 m / s. 3 / h.

[0015] Preferably, the argon gas introduction rate in step (4) is 5-7 m / s. 3 / h.

[0016] A high specific surface area high nickel ternary precursor prepared using the aforementioned high specific surface area high nickel ternary precursor oxide.

[0017] A lithium-ion battery prepared using the aforementioned high specific surface area, high-nickel ternary precursor.

[0018] An application of the aforementioned lithium-ion battery in new energy vehicles.

[0019] The beneficial effects of this invention are:

[0020] (1) The high specific surface area high-nickel ternary precursor oxide prepared by the method disclosed in this invention has a larger specific surface area, reaching 180.19 m². 2 / g, the particles are loose and porous with high overall consistency, which can effectively improve the electrochemical performance of cathode materials when preparing cathode materials;

[0021] (2) By adjusting the temperature and time of the calcination process, this invention can effectively reduce the content of moisture and organic impurities, improve the sphericity of the later forming, effectively adjust the half-broad peak of the ternary precursor oxide, and control the specific surface area.

[0022] (3) The present invention prepares ternary precursor oxide by introducing nitrogen gas, and further controls the physicochemical properties by controlling the calcination temperature and calcination time. Therefore, the stability of production conditions can be ensured by the intelligent equipment of the atmosphere furnace throughout the reaction process.

[0023] (4) The present invention improves the structure of the ternary precursor oxide by oxidizing the loose and porous high-nickel ternary precursor hydroxide, which has a greater advantage in the subsequent preparation of ternary cathode materials. Attached Figure Description

[0024] Figure 1 This is a SEM cross-sectional view of the precursor prepared in Example 1;

[0025] Figure 2 This is a SEM cross-sectional view of the precursor prepared in Comparative Example 1;

[0026] Figure 3 This is a SEM cross-sectional view of the precursor prepared in Comparative Example 3. Detailed Implementation

[0027] The present invention will now be described in detail with reference to the accompanying drawings and specific embodiments. The embodiments shown below do not limit the scope of the invention as described in the claims. Furthermore, the complete contents of the configurations illustrated in the following embodiments are not limited to those necessary for the solution of the invention as described in the claims.

[0028] A method for preparing a high-specific-surface-area, high-nickel ternary precursor oxide, wherein the high-nickel ternary precursor oxide is (Ni m Co n Mn 100-m-n O, where 90≤m≤98, 0<n<10; the preparation method includes the following steps:

[0029] (1) Add water, sodium hydroxide solution with a concentration of 30-35wt%, and ammonia solution with a concentration of 13-17wt% to the reaction vessel, adjust the pH to 10-12.0, and obtain the reaction base liquid;

[0030] (2) Add a nickel-cobalt-manganese ternary solution with a total metal ion concentration of 100-130 g / L, a sodium hydroxide solution with a concentration of 30-35 wt%, and ammonia water with a concentration of 13-17 wt% to the reaction vessel, while simultaneously spraying 5-7 ml of hot water into the vessel. 3 Nitrogen gas is introduced at a rate of / h to carry out the co-precipitation reaction in a nitrogen atmosphere, and the ammonia concentration in the reaction system is controlled at 9-10 g / L; the reaction vessel and the thickener form a loop to concentrate the reaction system simultaneously with the co-precipitation reaction; the molar ratio of the three elements in the ternary solution is: nickel:cobalt:manganese = m:n:(100-mn), 90≤m<98, 0<n<10; the rate of adding nickel-cobalt-manganese ternary solution is 200-600 L / h, the rate of adding liquid alkali is 70-200 L / h, and the rate of adding ammonia water is 10-80 L / h;

[0031] (3) When the product particle D50 in the reaction system is maintained at 12-15μm, the reaction product is collected, and after aging, washing and drying, high-nickel ternary precursor hydroxide is obtained.

[0032] (4) The high-nickel ternary precursor hydroxide is added to an atmosphere furnace for calcination at a temperature of 5-7m. 3 Argon gas was introduced at a rate of 1 h, and the heating rate was controlled at 2-4℃ / min, the calcination temperature at 288-292℃, and the calcination time at 4-6 h, finally yielding a high specific surface area high-nickel ternary precursor oxide.

[0033] Example 1

[0034] A method for preparing a high-nickel ternary precursor oxide includes the following steps:

[0035] (1) Prepare a sulfate solution with a total metal ion concentration of 115 g / L by mixing nickel sulfate, cobalt sulfate and manganese sulfate in a ratio of nickel ion: cobalt ion: manganese ion = 90: 8.4: 1.6, using 32% sodium hydroxide solution as the alkaline solution and ammonia solution with a concentration of 15%.

[0036] (2) Add water to the reactor, add alkali solution to adjust the pH to 10.8, and obtain the reaction base liquid. Heat to 60°C. During the reaction for 8 hours, add metal salt solution at a feeding rate of 200 L / h, alkali solution at a feeding rate of 72 L / h, and ammonia flow rate of 20 L / h. After the reaction for 8 hours, add metal salt solution at a feeding rate of 450 L / h, alkali solution at a feeding rate of 160 L / h, and ammonia flow rate of 40 L / h. Stir at 300 rpm and control the ammonia concentration of the system to 9.0 ± 0.5 g / L. Continue the reaction and adjust the pH to maintain the D50 of the material in the reactor at 14 μm. After the particle size stabilizes, after aging, washing, and drying, the high-nickel ternary precursor is obtained.

[0037] Throughout the calcination process, the high-nickel ternary precursor was calcined in an atmosphere furnace at 290°C under a nitrogen atmosphere. The heating rate was 3°C / min, the calcination time was 5 hours, and the argon flow rate was 6 m³ / min. 3 / h.

[0038] Get as Figure 1-2 The high specific surface area high-nickel ternary precursor oxide shown has a specific surface area of ​​180.19 m². 2 / g, tap density is 1.94g / cm³ 3 The particle size distribution is D10-D90 = 8.38-18.79, and the half-peak width is 0.701.

[0039] Example 2

[0040] A method for preparing a high-specific-surface-area, high-nickel ternary precursor oxide, wherein the high-nickel ternary precursor oxide is (Ni 97.5 Co1Mn 1.5 The preparation method includes the following steps:

[0041] (1) Add water, a 30wt% sodium hydroxide solution and a 13wt% ammonia solution to the reaction vessel, adjust the pH to 10, and obtain the reaction base liquid;

[0042] (2) Add a nickel-cobalt-manganese ternary solution with a total metal ion concentration of 100 g / L, a sodium hydroxide solution with a concentration of 30 wt%, and ammonia water with a concentration of 13 wt% to the reactor, while simultaneously using 5 m 3 Nitrogen gas is introduced at a rate of / h to carry out the co-precipitation reaction in a nitrogen atmosphere, and the ammonia concentration in the reaction system is controlled at 9g / L; the reaction vessel and the thickener form a loop to concentrate the reaction system simultaneously with the co-precipitation reaction; the molar ratio of the three elements in the ternary solution is: nickel:cobalt:manganese = 97.5:1:1.5; the rate of adding the nickel-cobalt-manganese ternary solution is 200L / h, the rate of adding liquid alkali is 70L / h, and the rate of adding ammonia water is 10L / h;

[0043] (3) When the product particle D50 in the reaction system is maintained at 12μm, the reaction product is collected, and after aging, washing and drying, high-nickel ternary precursor hydroxide is obtained.

[0044] (4) The high-nickel ternary precursor hydroxide is added to an atmosphere furnace for heating and calcination, while simultaneously using a 5m atmosphere furnace. 3 Argon gas was introduced at a rate of / h, and the heating rate was controlled at 2℃ / min, the calcination temperature at 288℃, and the calcination time at 4h, finally yielding a high specific surface area high-nickel ternary precursor oxide. The specific surface area of ​​the high specific surface area high-nickel ternary precursor oxide was 182m². 2 / g, tap density is 1.95g / cm³ 3 The particle size distribution is D10-D90 = 6.35-17.96, and the half-peak width is 0.72.

[0045] Example 3

[0046] A method for preparing a high specific surface area, high-nickel ternary precursor oxide, wherein the high-nickel ternary precursor oxide is (Ni 92 Co4Mn4)O, the preparation method includes the following steps:

[0047] (1) Add water, a 35wt% sodium hydroxide solution, and a 17wt% ammonia solution to the reaction vessel, adjust the pH to 12.0, and obtain the reaction base liquid;

[0048] (2) Add a nickel-cobalt-manganese ternary solution with a total metal ion concentration of 130 g / L, a sodium hydroxide solution with a concentration of 35 wt%, and ammonia water with a concentration of 17 wt% to the reactor, while simultaneously using 7m 3 Nitrogen gas is introduced at a rate of / h to carry out the co-precipitation reaction in a nitrogen atmosphere, and the ammonia concentration in the reaction system is controlled at 10g / L; the reaction vessel and the thickener form a loop, and the reaction system is concentrated simultaneously with the co-precipitation reaction; the molar ratio of the three elements in the ternary solution is: nickel:cobalt:manganese = 92:4:4, and the rate of addition of nickel-cobalt-manganese ternary solution is 600L / h, the rate of addition of liquid alkali is 200L / h, and the rate of addition of ammonia water is 80L / h;

[0049] (3) When the product particle D50 in the reaction system is maintained at 15μm, the reaction product is collected, and after aging, washing and drying, high-nickel ternary precursor hydroxide is obtained.

[0050] (4) The high-nickel ternary precursor hydroxide is added to an atmosphere furnace for heating and calcination, while maintaining a temperature of 7m. 3Argon gas was introduced at a rate of / h, and the heating rate was controlled at 4℃ / min, the calcination temperature at 292℃, and the calcination time at 4-6h, ultimately yielding a high specific surface area high-nickel ternary precursor oxide. The specific surface area of ​​the high specific surface area high-nickel ternary precursor oxide was 195m². 2 / g, tap density is 1.93g / cm³ 3 The particle size distribution is D10-D90 = 9.32-20.92, and the half-peak width is 0.703.

[0051] Example 4

[0052] A method for preparing a high specific surface area, high-nickel ternary precursor oxide, wherein the high-nickel ternary precursor oxide is (Ni 95 Co3Mn2)O, the preparation method includes the following steps:

[0053] (1) Add water, a 32wt% sodium hydroxide solution and a 15wt% ammonia solution to the reaction vessel, adjust the pH to 11, and obtain the reaction base liquid;

[0054] (2) Add a nickel-cobalt-manganese ternary solution with a total metal ion concentration of 120 g / L, a sodium hydroxide solution with a concentration of 32 wt%, and ammonia water with a concentration of 15 wt% to the reactor, while simultaneously using 6 m 3 Nitrogen gas is introduced at a rate of / h to carry out the co-precipitation reaction in a nitrogen atmosphere, and the ammonia concentration in the reaction system is controlled at 9.5g / L; the reaction vessel and the thickener form a loop, and the reaction system is concentrated simultaneously with the co-precipitation reaction; the molar ratio of the three elements in the ternary solution is: nickel:cobalt:manganese = 95:3:2; the rate of adding nickel-cobalt-manganese ternary solution is 400L / h, the rate of adding liquid alkali is 120L / h, and the rate of adding ammonia water is 50L / h;

[0055] (3) When the product particle D50 in the reaction system is maintained at 13μm, the reaction product is collected, and after aging, washing and drying, high-nickel ternary precursor hydroxide is obtained.

[0056] (4) The high-nickel ternary precursor hydroxide is added to an atmosphere furnace for heating and calcination, while simultaneously using a 6m... 3 Argon gas was introduced at a rate of 3℃ / min, the heating rate was controlled at 291℃, and the calcination time was 5.5h, ultimately yielding a high specific surface area high-nickel ternary precursor oxide with a specific surface area of ​​192.5m². 2 / g, tap density is 1.93g / cm³ 3 The particle size distribution is D10-D90 = 7.41-18.02, and the half-maximum width is 0.705.

[0057] Comparative Example 1

[0058] A method for preparing a high-nickel ternary precursor oxide includes the following steps:

[0059] (1) Prepare a sulfate solution with a total metal ion concentration of 115 g / L by mixing nickel sulfate, cobalt sulfate and manganese sulfate in a ratio of nickel ion: cobalt ion: manganese ion = 90: 8.4: 1.6, using 32% sodium hydroxide solution as the alkaline solution and ammonia solution with a concentration of 15%.

[0060] (2) Add water to the reactor, add alkali solution to adjust the pH to 10.8, and obtain the reaction base liquid. Heat to 60°C. During the reaction for 8 hours, add metal salt solution at a feeding rate of 200 L / h, alkali solution at a feeding rate of 72 L / h, and ammonia flow rate of 20 L / h. After the reaction for 8 hours, add metal salt solution at a feeding rate of 450 L / h, alkali solution at a feeding rate of 160 L / h, and ammonia flow rate of 40 L / h. Stir at 300 rpm and control the ammonia concentration of the system to 9.0 ± 0.5 g / L. Continue the reaction and adjust the pH to maintain the D50 of the material in the reactor at 14 μm. After the particle size stabilizes, after aging, washing, and drying, the high-nickel ternary precursor is obtained.

[0061] Throughout the calcination process, the high-nickel ternary precursor was calcined in an atmosphere furnace at 380℃ under an argon atmosphere. The heating rate was 3℃ / min, the calcination time was 5 hours, and the argon flow rate was 6 m³ / min. 3 / h.

[0062] The specific surface area of ​​the nickel-cobalt-manganese ternary precursor is 65.94 m². 2 / g, tap density is 1.93g / cm³ 3 The half-peak width is 0.721.

[0063] Comparative Example 2

[0064] A method for preparing a high-nickel ternary precursor oxide includes the following steps:

[0065] (1) Prepare a sulfate solution with a total metal ion concentration of 115 g / L by mixing nickel sulfate, cobalt sulfate and manganese sulfate in a ratio of nickel ion: cobalt ion: manganese ion = 90: 8.4: 1.6, using 32% sodium hydroxide solution as the alkaline solution and ammonia solution with a concentration of 15%.

[0066] (2) Add water to the reactor, add alkali solution to adjust the pH to 10.8, and obtain the reaction base liquid. Heat to 60°C. During the reaction for 8 hours, add metal salt solution at a feeding rate of 200 L / h, alkali solution at a feeding rate of 72 L / h, and ammonia flow rate of 20 L / h. After the reaction for 8 hours, add metal salt solution at a feeding rate of 450 L / h, alkali solution at a feeding rate of 160 L / h, and ammonia flow rate of 40 L / h. Stir at 300 rpm and control the ammonia concentration of the system to 9.0 ± 0.5 g / L. Continue the reaction and adjust the pH to maintain the D50 of the material in the reactor at 14 μm. After the particle size stabilizes, after aging, washing, and drying, the high-nickel ternary precursor is obtained.

[0067] Throughout the calcination reaction, the high-nickel ternary precursor was calcined in an atmosphere furnace at 280°C under an argon atmosphere for 5 hours, with a nitrogen flow rate of 50 L / h.

[0068] The specific surface area of ​​the nickel-cobalt-manganese ternary precursor is 149.46 m². 2 / g, tap density is 1.9g / cm³ 3 The half-peak width is 0.881, and the XRD shows characteristic peaks of hydroxides, indicating incomplete calcination.

[0069] Comparative Example 3

[0070] A method for preparing a high-nickel ternary precursor oxide includes the following steps:

[0071] (1) Prepare a sulfate solution with a total metal ion concentration of 115 g / L by mixing nickel sulfate, cobalt sulfate and manganese sulfate in a ratio of nickel ion: cobalt ion: manganese ion = 90: 8.4: 1.6, using 32% sodium hydroxide solution as the alkaline solution and ammonia solution with a concentration of 15%.

[0072] (2) Add water to the reactor, add alkali solution to adjust the pH to 10.8, and obtain the reaction base liquid. Heat to 60°C. During the reaction for 8 hours, add metal salt solution at a feeding rate of 200 L / h, alkali solution at a feeding rate of 72 L / h, and ammonia flow rate of 20 L / h. After the reaction for 8 hours, add metal salt solution at a feeding rate of 450 L / h, alkali solution at a feeding rate of 160 L / h, and ammonia flow rate of 40 L / h. Stir at 300 rpm and control the ammonia concentration of the system to 9.0 ± 0.5 g / L. Continue the reaction and adjust the pH to maintain the D50 of the material in the reactor at 14 μm. After the particle size stabilizes, after aging, washing, and drying, the high-nickel ternary precursor is obtained.

[0073] Throughout the calcination process, the high-nickel ternary precursor was calcined in an atmosphere furnace at 380°C under a nitrogen atmosphere for 8 hours, with an argon flow rate of 6 m³ / h. 3 / h.

[0074] Get as Figure 3 The precursor oxide shown has a specific surface area of ​​131.49 m². 2 / g, tap density is 1.93g / cm³ 3 The half-peak width is 0.721.

[0075] The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for preparing a high specific surface area, high-nickel ternary precursor oxide, characterized in that, The high-nickel ternary precursor oxide is (Ni m Co n Mn 100-m-n O, where 90≤m≤98, 0<n<10; the preparation method includes the following steps: (1) Add water, liquid alkali and ammonia to the reaction vessel, adjust the pH to 10-12.0, and obtain the reaction base liquid; (2) Add nickel-cobalt-manganese ternary solution, liquid alkali and ammonia water to the reaction vessel, and simultaneously introduce nitrogen gas to carry out the co-precipitation reaction in the nitrogen atmosphere, and control the ammonia concentration in the reaction system to be 9-10 g / L. (3) When the product particle D50 in the reaction system is maintained at 12-15μm, the reaction product is collected, and after aging, washing and drying, high-nickel ternary precursor hydroxide is obtained. (4) The high-nickel ternary precursor hydroxide is added to an atmosphere furnace for heating and calcination, while argon gas is introduced. The heating rate is controlled at 2-4℃ / min, the calcination temperature is 288-292℃, and the calcination time is 4-6h, so as to finally obtain a high specific surface area high-nickel ternary precursor oxide.

2. The method for preparing a high specific surface area, high-nickel ternary precursor oxide according to claim 1, characterized in that, The liquid alkali mentioned in steps (1) and (2) is a sodium hydroxide solution with a concentration of 30-35 wt%; the concentration of the ammonia water is 13-17 wt%.

3. The method for preparing a high specific surface area, high-nickel ternary precursor oxide according to claim 1, characterized in that, Step (2) also includes using a thickener to thicken the reaction system: the reaction vessel and the thickener form a loop, and the reaction system is thickened at the same time as the coprecipitation reaction.

4. The method for preparing a high specific surface area, high-nickel ternary precursor oxide according to claim 1, characterized in that, The total concentration of metal ions in the nickel-cobalt-manganese ternary solution in step (2) is 100-130 g / L, wherein the molar ratio of the three elements is: nickel:cobalt:manganese = m:n:(100-mn), 90≤m<98, 0<n<10.

5. The method for preparing a high specific surface area, high-nickel ternary precursor oxide according to claim 4, characterized in that, Step (2): The rate of adding nickel-cobalt-manganese ternary solution to the reactor is 200-600 L / h; the rate of adding liquid alkali to the reactor is 70-200 L / h; the rate of adding ammonia water to the reactor is 10-80 L / h.

6. The method for preparing a high specific surface area, high-nickel ternary precursor oxide according to claim 1, characterized in that, The nitrogen gas introduction rate in step (2) is 5-7 m / s. 3 / h.

7. The method for preparing a high specific surface area, high-nickel ternary precursor oxide according to claim 1, characterized in that, The argon gas introduction rate in step (4) is 5-7 m / s. 3 / h.

8. A high specific surface area high nickel ternary precursor prepared using the high specific surface area high nickel ternary precursor oxide according to any one of claims 1-7.

9. A lithium-ion battery prepared using the high specific surface area, high-nickel ternary precursor as described in claim 8.

10. The application of the lithium-ion battery according to claim 9 in new energy vehicles.

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