Lithium-rich manganese-based positive electrode material with aluminum-doped surface and titanium-aluminum-lithium phosphate-coated surface and preparation thereof
A lithium aluminum titanium phosphate and lithium-rich manganese-based technology, which is applied in the fields of energy storage materials and electrochemistry, can solve the problems of complicated operation, increased impedance, difficult industrialized production, etc., and achieves low preparation cost, inhibited phase transition, and easy industrialized production. Effect
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[0035] Example 1
[0036] Synthesis Example-step method of the present embodiment the surface-coated Li 1.3 Al0.3 Ti 1.7 (Po 4 ) 3 And LI for surface-doped modified Al 1.2 Ni 0.2 Mn 0.6 O 2 The specific preparation process is as follows:
[0037] 1, 0.0701GAL (NO 3 ) 3 · 9h 2 O Soluble in 15 ml of anhydrous ethanol, stir until 0.5g of body Li 1.2 Ni 0.2 Mn 0.6 O 2 Ultrasound half an hour, then placed on a magnetic stirrer, a heating temperature of 70 ° C, a stirring rate of 350 r / min, dried the solution, then dried in an oven at 80 ° C for 12 h, resulting in Al (NO 3 ) 3 · 9h 2 O Covered LI 1.2 Ni 0.2 Mn 0.6 O 2 ;
[0038] 2. Place the dried powder in the muffle furnace, the temperature increase of 5 ° C / min is heated to 600 ° C for 5 hours to obtain Li of the surface-doped Al 1.2 Ni 0.2 Mn 0.6 O 2 ;
[0039] 3, add 15 ml of anhydrous ethanol, stirred for half an hour, stirred with stirring, and then dripped with anhydrous ethanol having 0.01 g of titanate titanate, and then s...
Example Embodiment
[0046] Example 2
[0047] This example is a step of synthesis of surface coating Li 1.3 Al 0.3 Ti 1.7 (Po 4 ) 3 And LI for surface-doped modified Al 1.2 Ni 0.2 Mn 0.6 O 2 The specific preparation process is as follows:
[0048] 1, 0.0701GAL (NO 3 ) 3 · 9h 2 O Soluble in 15 ml of anhydrous ethanol, stir until 0.5g of body Li 1.2 Ni 0.2 Mn 0.6 O 2 Ultrasound half an hour, then placed on a magnetic stirrer, a heating temperature of 70 ° C, a stirring rate of 350 r / min, and the solution was evaporated, then dried in an oven at 80 ° C for 2 h to give Al (NO 3 ) 3 · 9h 2 O Covered LI 1.2 Ni 0.2 Mn 0.6 O 2 ;
[0049] 2, the dried powder was added 15 ml of anhydrous ethanol, stirred for half an hour, and mixed with 0.01 g of titanate titanium titanate (titanate tetrabutyrate in anhydrous ethanol in anhydrous ethanol) , Then stir for half an hour;
[0050] 3, will 0.0009glioh · h 2 O and 0.0053Gnh 4 Hide 2 PO 4 The mixture was dissolved with 5 ml of ethanol and then added to the mixing l...
Example Embodiment
[0056] Example 3
[0057] This example is a step of synthesis of surface coating Li 1.3 Al 0.3 Ti 1.7 (Po 4 ) 3 And LI of the surface-doped modified Al 1.2 Ni 0.2 Mn 0.6 O 2 The specific preparation process is as follows:
[0058] 1, 0.0701GAL (NO 3 ) 3 · 9h 2 O Soluble in 15 ml of anhydrous ethanol, stir until 0.5g of body Li 1.2 Ni 0.2 Mn0.6 O 2 Ultrasound half an hour, then placed on a magnetic stirrer, a heating temperature of 70 ° C, a stirring rate of 350 r / min, and the solution was evaporated, then dried in an oven at 80 ° C for 2 h to give Al (NO 3 ) 3 · 9h 2 O Covered LI 1.2 Ni 0.2 Mn 0.6 O 2 ;
[0059] 2, the dried powder was added to 15ml of absolute ethanol, stirred for half an hour, a solution of 0.01g of tetrabutyl titanate dissolved in absolute ethanol thoroughly mixed, and then stirred for half an hour;
[0060] 3, will 0.0009glioh · h 2 O and 0.0053Gnh 4 Hide 2 PO 4 Then added with 5ml of ethanol was dissolved mixture in Step 2, followed by stirring IH; then pla...
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