Ta/W mixed polyoxometallate, preparation method thereof and application of Ta/W mixed polyoxometallate in lithium ion battery negative electrode material
A polyoxometalate and lithium-ion battery technology, applied in battery electrodes, negative electrodes, secondary batteries, etc., can solve unsatisfactory problems and achieve the effects of low equipment requirements, mild reaction conditions, and simple preparation process
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Embodiment 1
[0025] 50mg Cs 3 K 3.5 h 0.5 [SiW 9 (TaO 2 ) 3 o 37 ]·9H 2 O with 20mg AlCl 3 Mix it, put it in a small glass bottle about 5 cm high, put the small glass bottle in the core of polytetrafluoroethylene containing 3 ml of hydrochloric acid with a concentration of 1.0M, and then place the reaction kettle in a programmable temperature control In the oven, the temperature was raised to 120 degrees Celsius at a rate of 5 degrees Celsius per minute, and kept at 120 degrees Celsius for 72 hours, then slowly cooled to room temperature, and the solid in the small glass bottle was poured into a beaker and cleaned in an ultrasonic cleaner. Finally, colorless blocky crystals were obtained. The obtained product was analyzed by X-ray polycrystal diffraction ( figure 1 ). X-ray single crystal diffraction analysis shows that the structural formula of compound 1 is Cs 7 [(Si 2 W 18 Ta 6 o 78 )Al(H 2 O) 4 ]·17H 2 O, which is composed of basic building units {WO 6} and {TaO 6},...
Embodiment 2
[0030] 50mg Cs 3 K 3.5 h 0.5 [SiW 9 (TaO 2 ) 3 o 37 ]·9H 2 O with 20mg ZnCl 2 Mix it, put it in a small glass bottle about 5 cm high, put the small glass bottle in the core of polytetrafluoroethylene containing 3 ml of hydrochloric acid with a concentration of 1.0M, and then place the reaction kettle in a programmable temperature control In the oven, the temperature was raised to 120 degrees Celsius at a rate of 5 degrees Celsius per minute, and kept at 120 degrees Celsius for 72 hours, then slowly cooled to room temperature, and the solid in the small glass bottle was poured into a beaker and cleaned in an ultrasonic cleaner. Finally, colorless blocky crystals were obtained. The obtained product was analyzed by X-ray polycrystal diffraction ( figure 2 ). X-ray single crystal diffraction analysis shows that the structural formula of compound 2 is Cs 16 [(Si 4 W 36 Ta 12 o 156 )Zn 2 (H 2 O) 2 ]·12H 2 O, which is composed of basic building units {WO 6} and {...
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