Preparation method and application of nickel-cobalt-aluminium ternary cathode material
A positive electrode material, nickel-cobalt-aluminum technology, applied in the field of lithium-ion battery positive electrode material preparation, can solve problems such as difficult to obtain tap density, achieve the effect of improving electrochemical performance, good sphericity, and facilitating extraction and insertion
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0056] This embodiment provides a nickel-cobalt-aluminum ternary positive electrode material LiNi 0.8 co 0.15 Al 0.05 o 2 The preparation method is to add precipitant and complexing agent coprecipitation reaction in the mixed solution of nickel salt and cobalt salt to obtain nickel-cobalt precursor β-Ni 0.85 co 0.15 (OH) 2 , and then mix the nickel-cobalt precursor with the aluminum source and the lithium source evenly, and then calcine at a high temperature to obtain LiNi 0.8 co 0.15 Al 0.05 o 2 The positive electrode material specifically comprises the following steps:
[0057] S1, precursor β-Ni 0.85 co 0.15 (OH) 2 preparation of
[0058] NiSO 4 ·6H 2 O and CoSO 4 ·7H 2 O is the raw material, and its mass ratio n Ni :n Co =85:15 Accurately weigh and prepare 2mol L -1 Sulfate mixed solution, in the form of 4mol·L -1 NaOH is the precipitating agent, 1mol L -1 NH 3 ·H 2 O is a complexing agent, and the precursor product β-Ni is prepared 0.85 co 0.15 (OH)...
Embodiment 2
[0062] In this example LiNi 0.8 co 0.15 Al 0.05 o 2 The preparation method of positive electrode material is as follows:
[0063] S1, precursor β-Ni 0.85 co 0.15 (OH) 2 preparation of
[0064] NiSO 4 ·6H 2 O and CoSO 4 ·7H 2 O is the raw material, and its mass ratio n Ni :n Co =75:25 Accurately weigh and prepare 3mol L -1 Sulfate mixed solution, in the form of 6mol·L -1 Hydrogen peroxide as precipitant, 3mol L -1 EDTA is used as a complexing agent to prepare the precursor product β-Ni 0.85 co 0.15 (OH) 2 .
[0065] S2, LiNi 0.8 co 0.15 Al 0.05 o 2 preparation of
[0066] The prepared precursor material β-Ni 0.85 co 0.15 (OH) 2 with lithium source LiOH·H 2 O and aluminum source C 9 h 21 AlO 3 According to a certain ratio (the molar ratio of lithium source and aluminum source aluminum isopropoxide is 1:0.08), it is fully mixed and placed in a tube furnace, and the temperature is raised to 550°C in an oxygen atmosphere, and the temperature is continu...
Embodiment 3
[0068] In this example LiNi 0.8 co 0.15 Al 0.05 o 2 The preparation method of positive electrode material is as follows:
[0069] S1, precursor β-Ni 0.85 co 0.15 (OH) 2 preparation of
[0070] With Ni(NO 3 ) 2 ·6H 2 O and Co(NO 3 ) 2 ·7H 2 O is the raw material, and its mass ratio n Ni :n Co =80:20 Accurately weigh and prepare 1mol L -1 Sulfate mixed solution, in the form of 3mol·L -1 NaOH is the precipitating agent, 2mol L -1 NH 3 ·H 2 O is a complexing agent, and the precursor product β-Ni is prepared 0.85 co 0.15 (OH) 2 .
[0071] S2, LiNi 0.8 co 0.15 Al 0.05 o 2 preparation of
[0072] The prepared precursor material β-Ni 0.85 co 0.15 (OH) 2 with lithium source Li 2 CO 3 and aluminum source C 9 h 21 AlO 3 According to a certain ratio (the molar ratio of lithium source and aluminum source aluminum isopropoxide is 1:0.1), it is fully mixed and placed in a tube furnace, and the temperature is raised to 500°C in an oxygen atmosphere, and the ...
PUM
| Property | Measurement | Unit |
|---|---|---|
| Diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More