Ternary cathode material, precursor thereof, and preparation method of ternary cathode material and precursor
A cathode material and precursor technology, which is applied in the field of battery materials, can solve problems such as no solutions, and achieve the effects of optimal cycle rate performance, improved storage and electrochemical performance, and improved tap density.
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[0052] Example 1:
[0053] A LiNi with a special structure 0.8 Co 0.1 Mn 0.1 O 2 The preparation method of the ternary cathode material includes the following steps:
[0054] Preparation of Ternary Oxide Precursor by S1 Spray Pyrolysis
[0055] NiCl 2 , CoCl 2 And MnCl 2 According to the ratio of 8:1:1 (molar ratio), a solution with a total metal ion concentration of 0.5mol / L is prepared. After ultrasonic atomization, the solution is loaded into the pyrolysis furnace by an oxygen carrier gas, and the flow rate of oxygen is 4L / min , Ni obtained by pyrolysis at 750℃ 0.8 Co 0.1 Mn 0.1 O x After the precursor is filtered and collected by the upper nickel mesh;
[0056] S2 prepares co-precipitation reaction seed crystal
[0057] 2g Ni 0.8 Co 0.1 Mn 0.1 O x The oxide precursor was added to the bottom of the co-precipitation reactor as a seed crystal; 500ml of 3mol / L ammonia water was configured, and 300 mL was poured into the co-precipitation reactor as the bottom liquid, and slowly stirred ...
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[0067] Example 2:
[0068] A LiNi with a special structure 0.85 Co 0.075 Mn 0.075 O 2 The preparation method of the ternary cathode material includes the following steps:
[0069] Preparation of Ternary Oxide Precursor by S1 Spray Pyrolysis
[0070] NiCl 2 , CoCl 2 And MnCl 2 According to the ratio of 34:15:15 (molar ratio), a solution with a total metal ion concentration of 0.5mol / L is prepared. After the solution is ultrasonically atomized, it is loaded into the pyrolysis furnace by oxygen, and the flow rate of oxygen is 4L / min. Ni obtained at 780℃ 0.85 Co 0.075 Mn 0.075 O x After the precursor is filtered and collected by the upper nickel mesh;
[0071] S2 prepares co-precipitation reaction seed crystal
[0072] 1.8g Ni 0.85 Co 0.075 Mn 0.075 O x The oxide precursor is added to the bottom of the co-precipitation reactor as a seed crystal; 500ml of 3mol / L ammonia water is configured, and 200 mL is poured into the co-precipitation reactor as the bottom liquid, and slowly stirred to ma...
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[0082] Example 3:
[0083] A Ternary Cathode Material LiNi with Special Structure 0.5 Co 0.25 Mn 0.25 O 2 @LiNi 0.9 Co 0.05 Mn 0.05 O 2 , Its preparation method includes the following steps:
[0084] Preparation of Ternary Oxide Precursor by S1 Spray Pyrolysis
[0085] NiCl 2 ·6H 2 O, CoCl 2 ·6H 2 O, MnCl 2 ·4H 2 O is dissolved in water at 18:1:1 (molar ratio) to form a solution with a total metal ion concentration of 0.6mol / L. After ultrasonic atomization, the solution is loaded into the pyrolysis furnace by oxygen, and the flow rate of oxygen is 6L / min, Ni obtained by pyrolysis at 750℃ 0.9 Co 0.05 Mn 0.05 O x After the precursor is filtered and collected by the upper nickel mesh;
[0086] S2 prepares co-precipitation reaction seed crystal
[0087] 2g Ni 0.9 Co 0.05 Mn 0.05 O x The oxide precursor is added to the bottom of the co-precipitation reactor as a seed crystal; 500ml of 2mol / L ammonia water is configured, and 300 mL is poured into the co-precipitation reactor as the bottom l...
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