Preparation method and application of single-crystal high-nickel ternary material with completely modified surface

[0027] Example 1:

[0028] a MgB 2 The preparation method of the single crystal high-nickel ternary material with completely modified surface comprises the following steps:

[0029] 1) Weigh 200 g of Ni 0.8 co 0.1 mn 0.1 (OH) 2 , then weigh lithium hydroxide according to the lithium source: the molar ratio of the ternary precursor is 1.05, then put it into the mixer and mix it evenly, and place the evenly mixed mixture in the pre-oxygenated atmosphere furnace, set the calcining program, first at 480 °C for 5 h, then at 750 °C for 15 h, with a heating rate of 5 °C / min;

[0030] 2) The high-nickel ternary material obtained in step 1) is crushed, and then passed through a 400-mesh sieve to obtain a single-crystal high-nickel ternary material with uniform particle size dispersion;

[0031] 3) Weigh 100 g of the single crystal high-nickel ternary material obtained in step 2), add it to a 5 L vacuum stirred reactor, add 2 L, 0.009 M Mg(NO 3 ) 2 in anhydrous ethanol solution,

[0033] Example 2:

[0034] A kind of Co 2 The preparation method of the fully modified single crystal high-nickel ternary material of B surface comprises the steps:

[0035] 1) Weigh 200 g of Ni 0.8 co 0.1 mn 0.1 (OH) 2 , then weigh lithium hydroxide according to the lithium source: the molar ratio of the ternary precursor is 1.05, then put it into the mixer and mix it evenly, and place the evenly mixed mixture in the pre-oxygenated atmosphere furnace, set the calcining program, first at 480 °C for 5 h, then at 750 °C for 15 h, with a heating rate of 5 °C / min;

[0036] 2) The high-nickel ternary material obtained in step 1) is crushed, and then passed through a 400-mesh sieve to obtain a single-crystal high-nickel ternary material with uniform particle size dispersion;

[0037] 3) Weigh 100 g of the single crystal high-nickel ternary material obtained in step 2), add it to a 5 L vacuum stirred reactor, add 2 L, 0.009 M Mg(NO 3 ) 2 in anhydrous ethanol solution, slowly s

[0039] Example 3:

[0040] A method for preparing a single crystal high-nickel ternary material with a fully modified FeB surface, comprising the following steps

[0041] 1) Weigh 200 g of Ni 0.8 co 0.1 mn 0.1 (OH) 2 , then weigh lithium hydroxide according to the lithium source: the molar ratio of the ternary precursor is 1.05, then put it into the mixer and mix it evenly, and place the evenly mixed mixture in the pre-oxygenated atmosphere furnace, set the calcining program, first at 480 °C for 5 h, then at 750 °C for 15 h, with a heating rate of 5 °C / min;

[0042] 2) The high-nickel ternary material obtained in step 1) is crushed, and then passed through a 400-mesh sieve to obtain a single-crystal high-nickel ternary material with uniform particle size dispersion;

[0043] 3) Weigh 100 g of the single crystal high-nickel ternary material obtained in step 2), add it to a 5 L vacuum stirred reactor, add 2 L, 0.009 M Fe(NO 3 ) 2 in anhydrous ethanol solution, slowly stirr