High-power charging and discharging lithium ion battery positive electrode material and preparation method thereof
A lithium-ion battery, cathode material technology, applied in battery electrodes, batteries, secondary batteries, etc., can solve the problems of poor safety performance, unsatisfactory high current performance, etc., and achieve the effect of high charge and discharge power and high safety
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Embodiment 1
[0020] High power charge and discharge lithium ion battery cathode material Li 2 Fe 2 (MoO 4 ) 3 The preparation method is as follows:
[0021] 1) Weigh 404g of Fe(NO 3 ) 3 9H 2 O (1mol) was added to 1L deionized water to prepare a 1mol / L solution, and 363g (1.5mol) Na was weighed 2 MoO 4 2H 2 O was added with 1.5L deionized water to prepare a 1mol / L aqueous solution. The two solutions were mixed and stirred evenly, wherein the molar ratio of sodium molybdate and ferric nitrate was 3:2, and the pH of the solution was adjusted to 0.8. The mixed solution was transferred to a reaction kettle, the temperature was gradually raised to 200° C., and the reaction was maintained for 4 hours. After the hydrothermal reaction is completed, the reaction product is suction-filtered and washed several times, and then dried at 80° C. to obtain iron molybdate powder with a grain size of 0.5-10 microns.
[0022] 2) Dissolve 133g of lithium iodide in 1L of acetonitrile solvent to obtai...
Embodiment 2
[0025] High power charge and discharge lithium ion battery cathode material Li 2 Fe 2 (MoO 4 ) 3 The preparation method is as follows:
[0026] 1) Weigh 40.4g of Fe(NO 3 ) 3 9H 2 O (0.1mol) was added to 1L deionized water to prepare a 0.1mol / L solution, and 36.3g (0.15mol) Na was weighed 2 MoO 4 2H 2 O was added with 1.5L deionized water to prepare a 0.1mol / L aqueous solution. The two solutions were mixed and stirred evenly, wherein the molar ratio of sodium molybdate and ferric nitrate was 3:2, and the pH of the solution was adjusted to 1.5. Transfer the mixed solution to a reaction kettle, gradually raise the temperature to 160° C., and keep the temperature for 24 hours. After the hydrothermal reaction is completed, the reaction product is suction-filtered and washed several times, and then dried at a low temperature of 100° C. to obtain iron molybdate powder with a grain size of 0.5-5 microns.
[0027] 2) Dissolve 133g of lithium iodide in 500mL of acetonitrile t...
Embodiment 3
[0030] High power charge and discharge lithium ion battery cathode material Li 2 Fe 2 (MoO 4 ) 3 The preparation method is as follows:
[0031] 1) Weigh 40.4g of Fe(NO 3 ) 3 9H 2 O (0.1mol) was added to 0.5L deionized water to prepare a 0.2mol / L solution, and 36.3g (0.15mol) Na was weighed 2 MoO 4 2H 2 O was added with 1L of deionized water to prepare a 0.15mol / L aqueous solution. The two solutions were mixed and stirred evenly, wherein the molar ratio of sodium molybdate and ferric nitrate was 3:2, and the pH of the solution was adjusted to 1. The mixed solution was transferred to a reaction kettle, the temperature was gradually raised to 180°C, and the reaction was kept for 12 hours. After the hydrothermal reaction is completed, the reaction product is suction-filtered and washed several times, and then dried at 100° C. to obtain iron molybdate powder with a grain size of 0.5-10 microns.
[0032] 2) Dissolve 133g of lithium iodide in 5L of acetonitrile to obtain a 0...
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