Preparation method of titanium-doped lithium iron phosphate
A technology of lithium iron phosphate and lithium carbonate, applied in chemical instruments and methods, phosphorus compounds, inorganic chemistry, etc., can solve the problems of entering lithium position, uncertainty, metal ions entering iron position, etc. The effect of compaction density, improving electronic conductivity
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[0036] Example 1
[0037] A method for preparing titanium-doped lithium iron phosphate includes the following steps:
[0038] 1) Pour the titanium tetrachloride into the 1.5mol / L phosphoric acid solution, and stir while feeding the titanium tetrachloride. The feeding time is 50min. The feeding process maintains the temperature at 60℃, and then stirring for 15min, then Put the reaction slurry into a sealed reactor, evaporate under reduced pressure until the water is completely evaporated, the evaporated vapor is recovered by condensation, and the tail gas is absorbed by spraying;
[0039] 2) After the evaporated powder is poured out, it is pulverized, sieved, and iron-removed by jet, then mixed with lithium carbonate, mixed, slurried, ground, sprayed and calcined, and the material obtained is pulverized and sieved by jet After separating and removing iron, obtain a calcined material;
[0040] 3) Add the primary calcined material to the polyethylene glycol solution, stir the slurry to ...
Example Embodiment
[0053] Example 2
[0054] A method for preparing titanium-doped lithium iron phosphate includes the following steps:
[0055] 1) Pour titanium tetrachloride into a 1.2mol / L phosphoric acid solution, and stir while feeding titanium tetrachloride. The feeding time is 50min, and the feeding process maintains the temperature at 65℃, then stirs for 15min, then Put the reaction slurry into a sealed reactor, evaporate under reduced pressure until the water is completely evaporated, the evaporated vapor is recovered by condensation, and the tail gas is absorbed by spraying;
[0056] 2) After the evaporated powder is poured out, it is pulverized, sieved, and iron-removed by jet, then mixed with lithium carbonate, mixed, slurried, ground, sprayed and calcined, and the material obtained is pulverized and sieved by jet After separating and removing iron, obtain a calcined material;
[0057] 3) Add the primary calcined material to the polyethylene glycol solution, stir the slurry to obtain the sl...
Example Embodiment
[0068] Example 3
[0069] A method for preparing titanium-doped lithium iron phosphate includes the following steps:
[0070] 1) Pour titanium tetrachloride into a 2mol / L phosphoric acid solution, and stir while feeding titanium tetrachloride. The feeding time is 50min, and the feeding process maintains the temperature at 55°C, then stirring for 20min, then The reaction slurry is put into a sealed reactor, evaporated under reduced pressure until the water is completely evaporated to dryness, the evaporated vapor is recovered by condensation, and the tail gas is absorbed by spraying;
[0071] 2) After the evaporated powder is poured out, it is pulverized, sieved, and iron-removed by jet, then mixed with lithium carbonate, mixed, slurried, ground, sprayed and calcined, and the material obtained is pulverized and sieved by jet After separating and removing iron, obtain a calcined material;
[0072] 3) Add the primary calcined material to the polyethylene glycol solution, stir the slurry...
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