Method for preparing lithium iron phosphate positive electrode material coated by home position graphitization carbon
A graphitized carbon and lithium iron phosphate technology, applied in battery electrodes, lithium batteries, structural parts, etc., can solve problems such as increased cost, poor carbon conductivity, and difficulty in improving the conductivity of lithium iron phosphate, and achieve particle size distribution Uniform, excellent room temperature rate performance and cycle performance, high purity effect
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Embodiment 1
[0025] Weigh 24.55g ferrocene, 10.30g35% formaldehyde solution, 4.91g anhydrous ZnCl 2 Add it into a 500mL three-necked flask, heat it in an oil bath at 120°C for 10 hours, and keep it under vigorous mechanical stirring. After the reaction, cool it down to room temperature naturally, and wash it three times with a mixed solvent of benzene and dichloromethane with a volume ratio of 1:1. , washed with deionized water until the washing solution was colorless, and the obtained black solid was vacuum-dried at 100° C. for 12 hours. Weigh 3.8519g of dried black powder, 0.7192gLi 2 CO 3 , 2.2195gNH 4 h 2 PO 4 Add it into a 100mL agate ball mill jar, control the ball-to-material ratio to 5:1, pour 15mL of acetone with a purity of 99.9% as a dispersion medium, and mill at 220r / min for 5 hours, and use an additional 10mL of a pure material with a purity of 99.9% Disperse with acetone, pour it into a petri dish, and dry it in vacuum at 80°C for 12 hours. Grind the dried sample, put i...
Embodiment 2
[0031] Weigh 24.55g ferrocene, 13.215g40% acetaldehyde solution, 4.91g anhydrous ZnCl 2, 3.5514g of 37% concentrated hydrochloric acid was added to a 500mL three-necked flask, heated by an oil bath at 160°C for 8 hours, accompanied by vigorous mechanical stirring during the heat preservation process, and naturally cooled to room temperature after the reaction was completed. The mixed solvent of methyl chloride was washed three times, and then washed with deionized water until the washing liquid was colorless, and the obtained black solid was vacuum-dried at 100° C. for 12 hours. Weigh the dried black powder 2.0623g, 0.8291gFe 2 o 3 , 0.7891gLi 2 CO 3 , 2.3912gNH 4 h 2 PO 4 , 0.1717gMnAc 2 4H 2 O was added to a 100mL agate ball mill jar, the ratio of balls to materials was 10:1, 15mL of acetone with a purity of 99.9% was poured into it as a dispersion medium, and ball milled at 200r / min for 8 hours, and an additional 10mL of acetone with a purity of 99.9% was used for t...
Embodiment 3
[0033] Weigh 24.55g ferrocene, 12.7344g benzaldehyde, 4.91g anhydrous ZnCl 2 , 5.3270g of 37% concentrated hydrochloric acid was added to a 500mL three-necked flask, heated in an oil bath at 170°C for 6 hours, accompanied by vigorous mechanical stirring during the heat preservation process, and naturally cooled to room temperature after the reaction, using benzene and dihydrogen at a volume ratio of 1:1 The mixed solvent of methyl chloride was washed three times, and then washed with deionized water until the washing liquid was colorless, and the obtained black solid was vacuum-dried at 100° C. for 12 hours. Weigh the dried black powder 1.5995g, 2.2042g FeC 2 o 4 , 2.5569g LiH 2 PO 4 , 0.3508gNiAc 2 4H 2 O was added to a 100mL agate ball mill jar, the ratio of the ball to material was 15:1, poured 15mL of acetone with a purity of 99.9% as the dispersion medium, and milled at 150r / min for 9 hours, and used an additional 10mL of the viscous material with a purity of 99.9% ...
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