Method for treating spinel lithium-rich lithium manganate doped with trivalent cations by acidic salt
A technology of trivalent cations and lithium-rich lithium manganese oxide, which is applied in the manufacture of hybrid/electric double-layer capacitors, electrical components, battery electrodes, etc., to achieve the effects of low raw material cost, simple preparation process, and improved high-current discharge performance
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Embodiment 1
[0030] Change the chemical composition to Li 4 mn 4.94 Al 0.06 o 12 The spinel lithium-rich lithium manganese oxide powder and ammonium dihydrogen phosphate were weighed according to the molar ratio of 1:0.0020. Add distilled water to the weighed spinel lithium-rich lithium manganese oxide powder doped with trivalent cations according to 50 times the volume of the total solid volume weighed, then add the weighed ammonium dihydrogen phosphate, and use a super energy ball mill to wet grind and mix After 12 hours, precursor 1 was prepared. Precursor 1 was removed with a filter to obtain precursor 2. Precursor 2 was washed with deionized water until the acidity of the washing solution was neutral, and then Precursor 2 was vacuum-dried at 190° C. and 1005 Pa to prepare Precursor 3 . Precursor 3 was placed in an oxygen-enriched air atmosphere with an oxygen volume content of 57%, sintered at 350°C for 20 hours, and cooled naturally to room temperature to prepare a modified alum...
Embodiment 2
[0033] Change the chemical composition to Li 4 mn 5.07 Cr 0.13 o 12 The spinel lithium-rich lithium manganese oxide powder and ammonium bisulfate were weighed according to the molar ratio of 1:0.090. According to 100 times the volume of the weighed solid total volume, add an ethanol solution with a weight content of 95 wt % of deionized water to the weighed spinel lithium-rich lithium manganese oxide powder doped with trivalent cations, and then add ammonium bisulfate, Precursor 1 was obtained by wet milling and mixing with a common ball mill for 15 hours. Use a centrifuge to remove the centrifugation solution of precursor 1, and the obtained precipitate is precursor 2. The precursor 2 was washed with distilled water until the acidity of the washing solution was neutral, and then the precursor 2 was dried at 230° C. and 10132 Pa to prepare the precursor 3 . Precursor 3 was placed in an oxygen-enriched air atmosphere with an oxygen volume content of 99%, sintered at 350°C ...
Embodiment 3
[0036] Change the chemical composition to Li 4 mn 4.897 sc 0.003 o 12 The spinel lithium-rich lithium manganese oxide powder and ammonium bisulfate were weighed according to the molar ratio of 1:0.0010. According to 5 times the volume of the weighed solid total volume, an acetone solution with a weight content of 5 wt % of deionized water was added to the weighed spinel lithium-rich lithium manganese oxide powder doped with trivalent cations, and then ammonium bisulfate was added. Precursor 1 was obtained by wet milling and mixing with a super energy ball mill for 3 hours. Precursor 1 was removed with a filter press to obtain precursor 2. Precursor 2 was washed with deionized water until the acidity of the washing solution was neutral, and then Precursor 2 was vacuum-dried at 130° C. and 10 Pa to prepare Precursor 3 . Precursor 3 was placed in an oxygen-enriched air atmosphere with an oxygen volume content of 22%, sintered at 200°C for 24 hours, and cooled naturally to ro...
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