Preparation method of manganese and barium activated lithium iron phosphate as cathode material
A technology of lithium iron phosphate and cathode material, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve problems such as poor conductivity and low tap density, and achieve improved electrical conductivity, improved electronic conductivity, and improved unit cell Volume reduction effect
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Embodiment 1
[0025] Li2CO3 (99.73%), MnO2 (99.8%), BaCO3 (99.8%), FeC2O4.2H2O (99.06%), NH4H2PO4 (98%) raw material, according to 1mol Li: 0.00002molMn: 0.0003mol Ba: 1mol Fe: 1mol P ratio After mixing, in absolute ethanol (AR) medium, high-speed ball milling for 20h (rotating speed 200r / mimn). After drying at 105-120°C, the precursor is obtained, and the dried precursor is placed in a high-temperature furnace, and calcined at 500-750°C for 24 hours in an ordinary pure nitrogen (>99.5%) atmosphere. That is, the manganese and barium activated lithium iron phosphate cathode material of the present invention is obtained.
Embodiment 2
[0027] Li2CO3 (99.73%), MnO2 (99.8%), BaCO3 (99.8%), FeC2O4.2H2O (99.06%), NH4H2PO4 (98%) raw material, according to 1mol Li: 0.00004mol Mn: 0.001mol Ba: 1mol Fe: 1mol P After proportional mixing, high-speed ball milling (rotating speed 200r / min) in absolute ethanol (AR) medium for 20h. After drying at 105-120°C, the precursor is obtained, and the dried precursor is placed in a high-temperature furnace, and calcined at 500-750°C for 24 hours in an ordinary pure nitrogen (>99.5%) atmosphere. That is, the manganese and barium activated lithium iron phosphate cathode material of the present invention is obtained.
Embodiment 3
[0029] Li2CO3 (99.73%), MnO2 (99.8%), BaCO3 (99.8%), FeC2O4.2H2O (99.06%), NH4H2PO4 (98%) raw material, according to 1mol Li: 0.00005mol Mn: 0.003mol Ba: 1mol Fe: 1mol P After proportional mixing, high-speed ball milling (rotating speed 200r / min) in absolute ethanol (AR) medium for 20h. After drying at 105-120°C, the precursor is obtained, and the dried precursor is placed in a high-temperature furnace, and calcined at 500-750°C for 24 hours in an ordinary pure nitrogen (>99.5%) atmosphere. That is, the manganese and barium activated lithium iron phosphate cathode material of the present invention is obtained.
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Abstract
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