Manganese-series layered lithium-rich cathode material, preparation method thereof and applications thereof
A lithium-rich positive electrode material, layered technology, applied in the direction of battery electrodes, structural parts, electrical components, etc., to achieve the effect of low pyrolysis temperature and calcination temperature, wide source of manganese sources, and simple operation
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Embodiment 1
[0045] Weigh the raw material Li 1.9 MnO 2.95 , per mole Li 1.9 MnO 2.95 The ratio of consumption 4g stearic acid takes by weighing stearic acid, the stearic acid that takes is dissolved in dehydrated alcohol, then Li 1.9 MnO 2.95 Add the ethanol solution of stearic acid, and stir to obtain a mixture solution. The mixture solution was filtered and dried to obtain a precursor.
[0046] Put the precursor into the porcelain boat, push it into the tube furnace, under nitrogen atmosphere, at 300 o C under pyrolysis for 8 hours, take out the pyrolysis product after cooling with the furnace. Put the pyrolysis product into water, stir and dissolve, filter and dry to obtain solid insoluble matter. Put the solid insoluble matter into the porcelain boat, push it into the tube furnace, under nitrogen atmosphere, at 100 o Calcined at C for 12 hours, the product was obtained with furnace cooling.
[0047] The general chemical formula of the present embodiment product is 0.75Li 2 M...
Embodiment 2
[0051] Weigh the raw material Li 2 MnO 3 , per mole Li 2 MnO 3 The ratio of consumption 5g stearic acid takes by weighing stearic acid, the stearic acid that takes is dissolved in dehydrated alcohol, then Li 2 MnO 3 Add the ethanol solution of stearic acid, and stir to obtain a mixture solution. The mixture solution was filtered and dried to obtain a precursor.
[0052] Put the precursor into the porcelain boat, push it into the tube furnace, under the argon atmosphere, at 340 o Calcined at C for 4 hours, and the pyrolysis product was taken out after cooling with the furnace. Pour the pyrolysis product into water, stir to dissolve, centrifuge and dry to obtain solid insoluble matter. Put the solid insoluble matter into a porcelain boat, push it into a tube furnace, and heat it at 340°C under an argon atmosphere. o Calcined at C for 0.5 hours, and cooled in the furnace to obtain the final product.
[0053] The general chemical formula of the present embodiment product...
Embodiment 3
[0057] Weigh the raw material Li 2.2 MnO 3.1 , per mole Li 2.2 MnO 3.1 The ratio of consumption 8g stearic acid takes by weighing stearic acid, the stearic acid that takes is dissolved in dehydrated alcohol, then Li 2.2 MnO 3.1 Add the ethanol solution of stearic acid, and stir to obtain a mixture solution. The mixture solution was centrifuged and dried to obtain a precursor.
[0058] Put the precursor into the porcelain boat, push it into the tube furnace, under the helium atmosphere, at 320 o C under pyrolysis for 8 hours, take out the resulting pyrolysis product after cooling with the furnace. Pour the pyrolysis product into water, stir to dissolve, filter and dry to obtain solid insoluble matter. Put the solid insoluble matter into the porcelain boat, push it into the tube furnace, under the helium atmosphere, at 320 o Calcined at C for 4 hours and cooled in the furnace to obtain the final product.
[0059] The general chemical formula of the present embodiment p...
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