Method for preparing zinc and barium activated lithium iron phosphate cathode material
A technology of lithium iron phosphate and cathode materials, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc.
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Embodiment 1
[0026] Li2CO3 (99.73%), ZnCO3 (99.8%), BaCO3 (99.8%), FeC2O4.2H2O (99.06%), NH4H2PO4 (98%) raw material, according to 1mol Li: 0.00002mol Zn: 0.0003mol Ba: 1mol Fe: 1mol P After proportional mixing, high-speed ball milling in absolute ethanol (AR) medium for 20h (rotation speed 200r / min. After drying at 105-120°C, the precursor was obtained, and the dried precursor was placed in a high-temperature furnace. In a pure nitrogen (>99.5%) atmosphere, calcining at a high temperature of 500-750° C. for 24 hours to obtain the zinc and barium activated lithium iron phosphate cathode material of the present invention.
Embodiment 2
[0027] Embodiment 2 (no mixed contrast)
[0028] With Li2CO3 (99.73%), FeC2O4.2H2O (99.06%), NH4H2PO4 (98%) raw material, after mixing according to the ratio of 1mol Li: 1mol Fe: 1mol P, in absolute ethanol (AR) medium, high-speed ball milling 20h (rotating speed 200r / min. 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 The obtained lithium ion cathode material.
[0029] Using the testing equipment of the prior art and the testing method of the prior art, the zinc and barium activated lithium iron phosphate positive electrode material of the above embodiment 1, and the non-doped comparison example 2 are tested and the results are as follows:
[0030] The zinc and barium activated lithium iron phosphate cathode material of Example 1 of the present invention has an initial discharge capacity of more than 155.52mAh / g; the ...
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