A preparation method of lithium titanium phosphate coated ternary material and an application thereof
A ternary material, lithium titanium phosphate technology, applied in the direction of electrical components, electrochemical generators, battery electrodes, etc., can solve the problems of poor ion conductivity and the influence of material rate performance, so as to improve the conductivity, increase the rate performance, pack uniform effect
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Embodiment 1
[0025] In this example, lithium titanium phosphate-coated ternary materials were prepared according to the following steps:
[0026] Step 1: Add 3.87g PEG2000 into 100mL deionized water, stir for 10min to dissolve completely.
[0027] Step 2: Add 0.103g nanoscale titanium dioxide, 0.223g ammonium dihydrogen phosphate and 0.024g lithium carbonate to the solution obtained in step 1, and stir at 80°C for 30min until a sol is formed.
[0028] Step 3: Add 12.5 g of NCM523 ternary material powder to the sol obtained in Step 2, and continue to stir at 80° C. for 10 h to obtain a mixture. The coating content of the nickel-cobalt-manganese ternary material is controlled to be 2 wt%.
[0029] Step 4: Put the mixture obtained in Step 3 into a constant temperature drying oven at 150° C. for 24 hours.
[0030] Step 5: Take out the dried product and grind it evenly, then transfer it to a tube furnace, and heat it at 450°C for 4 hours and at 650°C for 12 hours under an argon protection atmo...
Embodiment 2
[0032] In this example, lithium titanium phosphate-coated ternary materials were prepared according to the following steps:
[0033] Step 1: Add 3.87g PEG2000 into 100mL deionized water, stir for 10min to dissolve completely.
[0034] Step 2: Add 0.103g of nanoscale titanium dioxide, 0.223g of ammonium dihydrogen phosphate and 0.024g of lithium carbonate to the solution obtained in step 1, and stir at 80°C for 30min until a sol is formed.
[0035] Step 3: Add 12.5 g of NCM523 ternary material powder to the sol obtained in Step 2, and continue to stir at 80° C. for 10 h to obtain a mixture. The coating content of the nickel-cobalt-manganese ternary material is controlled to be 2 wt%.
[0036] Step 4: Put the mixture obtained in Step 3 into a constant temperature drying oven at 150° C., and dry it for 24 hours.
[0037] Step 5: Take out the dried product and grind it evenly, then transfer it to a tube furnace, and heat it at 450°C for 4 hours and at 750°C for 12 hours under an ...
Embodiment 3
[0039] In this example, lithium titanium phosphate-coated ternary materials were prepared according to the following steps:
[0040] Step 1: Add 3.87g PEG2000 into 100mL deionized water, stir for 10min to dissolve completely.
[0041] Step 2: Add 0.103g of nanoscale titanium dioxide, 0.223g of ammonium dihydrogen phosphate and 0.024g of lithium carbonate to the solution obtained in step 1, and stir at 80°C for 30min until a sol is formed.
[0042] Step 3: Add 12.5 g of NCM523 ternary material powder to the sol obtained in Step 2, and continue to stir at 80° C. for 10 h to obtain a mixture. The coating content of the nickel-cobalt-manganese ternary material is controlled to be 2 wt%.
[0043] Step 4: Put the mixture obtained in Step 3 into a constant temperature drying oven at 150° C., and dry it for 24 hours.
[0044] Step 5: Take out the dried product and grind it evenly, then transfer it to a tube furnace, heat at 450°C for 4 hours and at 850°C for 12 hours under an argon p...
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