Pre-burning treatment containing synthesis method of metal aluminum doped spinel lithium manganate cathode material
A spinel lithium manganate, cathode material technology, applied in battery electrodes, electrical components, electrochemical generators, etc., can solve the problem of wide crystal particle size distribution, uneven product phase, irregular morphology, etc. problem, to achieve the effect of low price, simple method and short production process
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Embodiment 1
[0026] Example 1 Weigh lithium carbonate 19.4g and electrolytic manganese dioxide 96.4g according to the stoichiometric ratio of Li:Mn=1.05:2, put them into a ball mill jar, the ball-to-material ratio is 10:1, use absolute ethanol as the medium, and put them on the ball mill with Wet mill at a rate of 800r / min for 6h, and then dry in an air-blast drying oven at 80°C to obtain a precursor, which is pulverized and finely ground with a sample grinder. Raise the temperature at a rate of 5°C / min to 500°C for 6 hours, cool and grind, then raise it to 750°C at a rate of 5°C / min and hold for 24 hours, cool and grind; then place it in a tube furnace with an oxygen atmosphere for annealing. The temperature is 600°C, the holding time is 6 hours, cooled and sieved to obtain the positive electrode material of lithium ion battery.
[0027] The charging and discharging performance test of the product in this example: mix the lithium-ion battery positive electrode material, conductive c...
Embodiment 2
[0028] Example 2 According to the stoichiometric ratio of Li:Mn:Al=1.05:1.9:0.1, 19.4g of lithium carbonate, 90.8g of electrolytic manganese dioxide, and 18.75g of aluminum nitrate nonahydrate were weighed and put into a ball mill tank with a ball-to-material ratio of 10:1. Using absolute ethanol as the medium, wet mill at a rate of 800r / min on a ball mill for 6h, then dry in a blast drying oven at 80°C to obtain a precursor, and use a sample grinder to pulverize the precursor. Raise the temperature at a rate of 5°C / min to 500°C for 6 hours, cool and grind, then raise it to 750°C at a rate of 5°C / min and hold for 24 hours, cool and grind; then place it in a tube furnace with an oxygen atmosphere for annealing. The temperature is 600°C, the holding time is 6 hours, cooled and sieved to obtain the positive electrode material of lithium ion battery.
[0029] The electrochemical performance test of this example product is identical with embodiment 1, and test result is shown in ...
Embodiment 3
[0032] Example 3 According to the stoichiometric ratio of Li:Mn:Al=1.05:1.9:0.1, 19.4g of lithium carbonate, 90.8g of electrolytic manganese dioxide, and 18.75g of aluminum nitrate nonahydrate were weighed and put into a ball mill tank with a ball-to-material ratio of 10:1. Using absolute ethanol as the medium, wet mill at a rate of 800r / min on a ball mill for 6h, then dry in a blast drying oven at 80°C to obtain a precursor, and use a sample grinder to pulverize the precursor. Raise the temperature at a rate of 5°C / min to 500°C for 6 hours, cool and grind, then raise it to 750°C at a rate of 5°C / min and hold for 6 hours, cool and grind; then place it in a tube furnace with an oxygen atmosphere for annealing treatment. The temperature is 600°C, the holding time is 6 hours, cooled and sieved to obtain the positive electrode material of lithium ion battery.
[0033]The electrochemical performance test of this example product is identical with embodiment 1, and test result is s...
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