Method for preparing anode material LiLaxNil-xO2 of lithium ion secondary battery

[0022] Example 1.

[0023] The molar ratio of Ni(NO 3 ) 2 · 6H 2 O and (NH 4 ) 2 S 2 O 8 Dissolve in water to form solutions A and B respectively. Slowly add solution B to solution A, stir evenly, drop into LiOH solution, adjust the pH to 11-12, and continue to stir for 15h to ensure complete precipitation. The precipitate is filtered out, washed and dried to obtain NiOOH. LiOH · H 2 O, NiOOH, La 2 O 3 Weigh in a molar ratio of 1.1:0.99:0.01, take it out after ball milling for 6 hours, and dry at 70°C to obtain the precursor, which is then transferred to a muffle furnace and raised to 600°C at a rate of 2°C / min. Keep it at this temperature for 15h, take it out after natural cooling, and get LiLa 0.01 Ni 0.99 O 2 solid. The assembled battery is 28mAg -1 The first discharge specific capacity under current density is 128mAhg -1 , The discharge platform is about 3.6V, and the cycle performance is good. The counter electrode of the assembled battery is a lithium sheet, and the elec

[0024] Example 2.

[0025] NiSO with a molar ratio of 1:1.1 4 And Na 2 S 2 O 8 Dissolve in water to form solutions C and D. Slowly add solution D to solution C, stir evenly and drop into the NaOH solution, adjust the pH to 11-12, and continue to stir for 15h to ensure complete precipitation. The precipitate is filtered out, washed and dried to obtain NiOOH. LiOH · H 2 O, NiOOH, La 2 O 3 Weighed in a molar ratio of 1.1:0.95:0.05, ball milled for 6h and then taken out, dried at 70°C to obtain the precursor, then transferred to the muffle furnace and raised to 600°C at a rate of 2°C / min. Keep it at this temperature for 15h, take it out after natural cooling, and get LiLa 0.05 Ni 0.95 O 2 solid. The test method of the obtained positive electrode material is the same as in Example 1.

[0026] Example 3.

[0027] Ni(OH) with a molar ratio of 1:1.1 2 And K 2 S 2 O 8 Dissolve in water to form solutions E and F respectively. Slowly add solution F to solution E, stir evenly and drop into NaOH solution to ensure that the pH of the solution is 11-12, and continue to stir for 15 hours to ensure complete precipitation. The precipitate is filtered out, washed and dried to obtain NiOOH. LiOH · H 2 O, NiOOH, La 2 O 3 Weighed in a molar ratio of 1.1: 0.9: 0.1, ball milled for 6 hours and then taken out, dried at 70°C to obtain the precursor, then transferred to the muffle furnace and raised to 600°C at a rate of 2°C / min. Keep it at this temperature for 15h, take it out after natural cooling, and get LiLa 0.1 Ni 0.9 O 2 solid. The test method of the obtained positive electrode material is the same as in Example 1.