A kind of preparation method of lithium titanate/titanium dioxide composite material
A composite material, titanium dioxide technology, applied in the direction of secondary batteries, electrochemical generators, structural parts, etc., can solve the problems of poor charge and discharge performance, and achieve the effect 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 condition for 12h, 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 12h; final...
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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