Preparation method of lithium titanate/titanium dioxide composite material
A composite material and titanium dioxide technology, which is applied in the field of preparation of lithium titanate/titanium dioxide composite materials, can solve problems such as poor charge and discharge performance, and achieve the effects of complete composite structure, high repeatability and simple preparation process
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Embodiment 1
[0031] Step 1, 5mLH 2 o 2 Dissolve in 100mL of lithium hydroxide solution with a concentration of 0.4mol / L, and then add 5mmol of butyl titanate to obtain a reaction mixture solution A;
[0032] Step 2, put the reaction mixed solution A into the polytetrafluoroethylene hydrothermal liner, react hydrothermally at a temperature of 130°C for 36 hours, cool to room temperature naturally after the reaction, wash and separate the precipitate, and separate the precipitate at 60°C ℃ under vacuum conditions for 12h to obtain Li 4 Ti 5 o 12 Precursor;
[0033] Step 3, weigh 0.05gLi 4 Ti 5 o 12 Disperse the precursor into 40 mL of absolute ethanol, then add 10 mmol of butyl titanate, stir at room temperature for 24 hours to carry out in-situ alcoholysis reaction, and obtain the reflected mixed solution B, wash the reflected mixed solution B and separate the precipitate;
[0034] Step 4, dry the separated precipitate at 80°C under vacuum for 12h; finally, in an air atmosphere, cal...
Embodiment 2
[0038] Step 1, 5mLH 2 o 2 Dissolve in 150mL of lithium hydroxide solution with a concentration of 0.4mol / L, and then add 10mmol of butyl titanate to obtain a reaction mixture solution A;
[0039] Step 2, put the reaction mixed solution A into the polytetrafluoroethylene hydrothermal liner, react hydrothermally at a temperature of 130°C for 36 hours, cool to room temperature naturally after the reaction, wash and separate the precipitate, and separate the precipitate at 60°C ℃ under vacuum conditions for 12h to obtain Li 4 Ti 5 o 12 Precursor;
[0040] Step 3, weigh 0.1gLi 4 Ti 5 o 12 The precursor was dispersed into 50mL of absolute ethanol, then 10mmol of butyl titanate was added, and stirred at room temperature for 24h to carry out the in-situ alcoholysis reaction to obtain the reaction mixture B, which was mixed with deionized water and anhydrous Wash with ethanol and separate the precipitate;
[0041] Step 4, dry the separated precipitate at 80°C under vacuum for ...
Embodiment 3
[0045] Step 1, 5mLH 2 o 2 Dissolve in 150mL of lithium hydroxide solution with a concentration of 0.4mol / L, and then add 10mmol of butyl titanate to obtain a reaction mixture solution A;
[0046] Step 2, put the reaction mixture solution A into the polytetrafluoroethylene hydrothermal liner, react hydrothermally at a temperature of 130°C for 48 hours, cool to room temperature naturally after the reaction, wash and separate the precipitate, and separate the precipitate at 60°C ℃ under vacuum conditions for 12h to obtain Li 4 Ti 5 o 12 Precursor;
[0047] Step 3, weigh 0.1gLi 4 Ti 5 o 12 The precursor was dispersed into 50mL of absolute ethanol, then 20mmol of butyl titanate was added, and stirred at room temperature for 24h to carry out the in-situ alcoholysis reaction to obtain the reaction mixture B, which was mixed with deionized water and anhydrous Wash with ethanol and separate the precipitate;
[0048] Step 4, dry the separated precipitate at 80°C under vacuum fo...
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