Lithium ferromanganese phosphate/carbon coated ternary material and preparation method thereof, lithium ion battery positive electrode and lithium ion battery
A lithium-ion battery and ternary material technology, applied in battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of difficult control of material phase purity, reduce side reactions in direct contact, low energy consumption, easy to use The effect of the operation
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[0054] Example 1
[0055] Preparation of LiMn by two-step solid phase method 0.6 Fe 0.4 PO 4 / C composite material, weigh 0.2molFe according to the stoichiometric ratio 2 O 3 , 0.2mol Mn 3 O 4 And 1mol LiH 2 PO 4 , And then weighed according to Fe 2 O 3 , Mn 3 O 4 , LiH 2 PO 4 2wt% of the theoretical mass of anhydrous glucose calculated by the number of moles, a certain amount of distilled water was sequentially added to the ball mill tank for wet ball milling for 2 hours, the ball milled slurry was spray-dried to obtain precursor 1, and the precursor 1 was placed in Precursor 2 was obtained by oxidizing at 420°C for 4 hours in an air atmosphere, and then the precursor 2 and the precursor 2 weight of 9wt% anhydrous glucose were wet ball milled and mixed for 2 hours. After spray drying, the precursor 3 was obtained. Finally, in a nitrogen atmosphere, Calcined at 700℃ for 4h, the heating rate is 10℃ / min, the final product LiMn is obtained 0.6 Fe 0.4 PO 4 / C Composite materials.
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[0062] Example 2
[0063] Preparation of LiMn by two-step solid phase method 0.6 Fe 0.4 PO 4 / C composite material, weigh 0.2molFe according to the stoichiometric ratio 2 O 3 , 0.2mol Mn 3 O 4 And 1mol LiH 2 PO 4 , And then weighed according to Fe 2 O 3 , Mn 3 O 4 , LiH 2 PO 4 2wt% of the theoretical mass of anhydrous glucose calculated by the number of moles, a certain amount of distilled water was sequentially added to the ball mill tank for wet ball milling for 2 hours, the ball milled slurry was spray-dried to obtain precursor 1, and the precursor 1 was placed in Precursor 2 was obtained by oxidizing at 450°C for 4 hours in an air atmosphere. Then the precursor 2 and the precursor 2 weight 10wt% anhydrous glucose were wet ball milled and mixed for 2 hours. After spray drying, the precursor 3 was obtained, and finally in an argon atmosphere , Calcined at 720℃ for 4h, the heating rate is 10℃ / min, the final product LiMn 0.6 Fe 0.4 PO 4 / C Composite materials. The performance of ...
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[0067] Example 3
[0068] Preparation of LiMn by two-step solid phase method 0.7 Fe 0.3 PO 4 / C composite material, weigh 0.35molFe according to the stoichiometric ratio 2 O 3 , 0.1mol Mn 3 O 4 And 1mol LiH 2 PO 4 , And then weighed according to Fe 2 O 3 , Mn 3 O 4 , LiH 2 PO 4 The theoretical mass of 5wt% anhydrous glucose calculated by the number of moles, a certain amount of distilled water was sequentially added to the ball mill tank for wet ball milling for 2 hours, the ball milled slurry was spray-dried to prepare precursor 1, and the precursor 1 was placed in Precursor 2 was obtained by oxidizing at 500°C for 2 hours in an air atmosphere, and then the precursor 2 was wet ball milled and mixed with 10wt% anhydrous glucose by weight of the precursor 2 for 2 hours, and spray-dried to obtain the precursor 3, and finally under a nitrogen atmosphere, Calcined at 730℃ for 4h, the heating rate is 10℃ / min, the final product LiMn is obtained 0.7 Fe 0.3 PO 4 / C Composite materials. T...
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