Low-temperature hydro-thermal synthesis for nano-lithium iron phosphate
A lithium iron phosphate, hydrothermal synthesis technology, applied in the direction of phosphorus compounds, chemical instruments and methods, inorganic chemistry, etc., can solve the problems of poor performance consistency, long preparation time, complex process, etc., to achieve good application value, material particles The effect of uniform degree and easy process control
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Embodiment 1
[0027] 27.8g FeSO 4 ·7H 2 O and 13.2g (NH 4 ) 2 HPO 4 Dissolve in aqueous solution and mix well, add 18.6g disodium edetate (complexing agent), then add 6.04g LiCl·H 2 O. Place the precursor solution in an ultrasonic oscillator and vibrate for 5 minutes, then transfer it into a 100mL stainless steel autoclave lined with a polytetrafluoroethylene tank, fill the solution with a volume of 90%, add 6 grams of urea, seal the autoclave, and keep it warm at 150°C for 10 hours Afterwards, the furnace was cooled, and the reaction product was taken out.
[0028] The above reaction product was washed with ethanol, then washed with distilled water, and centrifuged with a high-speed centrifuge (10 min each time, rotating speed 8000 rpm), repeated 3 times. The obtained solid was dried in a vacuum oven at a temperature of 60° C. for 4 hours. After drying, place it in a tube furnace with nitrogen protection, raise the temperature to 400°C at a heating rate of 5°C / min, and cool naturall...
Embodiment 2
[0030] 39.2g (NH 4 )2Fe(SO 4 ) 2 ·6H 2 O and 11.53g of phosphoric acid were dissolved in the aqueous solution and mixed uniformly, after adding 18.6g of disodium edetate (complexing agent), 7.4g of Li 2 CO 3 ·H 2 O. Place the precursor solution in an ultrasonic oscillator and vibrate for 5 minutes, then transfer it into a 100mL stainless steel autoclave lined with a polytetrafluoroethylene tank, fill the solution with a volume of 90%, add 9 grams of urea, seal the autoclave, and keep it warm at 170°C for 10 hours Afterwards, the furnace was cooled, and the reaction product was taken out.
[0031] The above reaction product was washed with ethanol, then washed with distilled water, and centrifuged with a high-speed centrifuge (10 min each time, rotating speed 8000 rpm), repeated 3 times. The obtained solid was dried in a vacuum oven at a temperature of 60° C. for 4 hours. After drying, place it in a tube furnace with nitrogen protection, raise the temperature to 400 deg...
Embodiment 3
[0033] 27.8g FeSO 4 ·7H 2 O and 11.53g of phosphoric acid with a concentration of 85% were dissolved in an aqueous solution and mixed uniformly. After adding 18.6g of disodium edetate (complexing agent), 6.04g of LiCl·H was added under constant stirring. 2 O. Place the precursor solution in an ultrasonic oscillator and vibrate for 5 minutes, then transfer it into a 100mL stainless steel autoclave lined with a polytetrafluoroethylene tank, fill the solution with a volume of 90%, add 9 grams of urea, seal the autoclave, and keep it warm at 170°C for 10 hours Afterwards, the furnace was cooled, and the reaction product was taken out.
[0034] The above reaction product was washed with ethanol, then washed with distilled water, and centrifuged with a high-speed centrifuge (10 min each time, rotating speed 8000 rpm), repeated 3 times. The obtained solid was dried in a vacuum oven at a temperature of 60° C. for 4 hours. After drying, place it in a tube furnace with nitrogen prot...
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