A kind of sodium ferric pyrophosphate material with flower-like structure and its preparation method and application
A sodium iron pyrophosphate, flower-like structure technology, applied in the direction of structural parts, electrical components, battery electrodes, etc., can solve the problem of difficult to effectively reduce the manufacturing cost of sodium-ion batteries, high rate performance, poor cycle life and electrical conductivity, and electronic conductivity. Poor performance and other problems, to achieve the effect of excellent high rate performance, excellent electrochemical performance, and large contact area
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Embodiment 1
[0043] (1) This embodiment is designed to generate 0.03mol target product Na 2 FeP 2 O 7 , dissolve 0.06 mol of ferrous chloride and 2 g of ascorbic acid in 80 mL of deionized water, stir evenly, and slowly add 0.02 mol of ammonium dihydrogen phosphate with vigorous stirring to obtain a mixed solution;
[0044] (2) Dissolve 0.036 mol of sodium acetate in 10 mL of deionized water, drop the obtained mixed solution in step (1) at a constant speed, and then add 20 g of triethanolamine, and then add 20 g of triethanolamine. The solution was transferred to a hydrothermal reactor, reacted at 200°C for 20h, and then the product was transferred to a water bath at 80°C to evaporate the solution, and the obtained solid was vacuum-dried in a vacuum drying oven for 24h;
[0045] (3) The precursor obtained in step (2) is ground evenly and then sintered at 300 °C under the protection of a hydrogen-argon mixed gas atmosphere, and then heated to 600 °C for 12 hours, and the heating rate is: ...
Embodiment 2
[0051] This embodiment includes the following steps:
[0052] (1) This embodiment is designed to generate 0.03mol target product Na 2 FeP 2 O 7 , dissolve 0.03 mol of ferrous chloride and 2 g of ascorbic acid in 80 mL of deionized water, stir evenly, and slowly add 0.06 mol of ammonium dihydrogen phosphate with vigorous stirring to obtain a mixed solution;
[0053] (2) Dissolve 0.03 mol of sodium acetate in 10 mL of deionized water, drop the obtained mixed solution in step (1) at a constant speed, and then add 20 g of triethanolamine, and then add 20 g of triethanolamine. The solution was transferred to a hydrothermal reactor, reacted at 200°C for 20h, and then the product was transferred to a water bath at 80°C to evaporate the solution, and the obtained solid was vacuum-dried in a vacuum drying oven for 24h;
[0054] (3) The precursor obtained in step (2) is ground evenly and then sintered at 300 °C under the protection of a hydrogen-argon mixed gas atmosphere, and then h...
Embodiment 3
[0057] This embodiment includes the following steps:
[0058] (1) This embodiment is designed to generate 0.03mol target product Na 2 FeP 2 O 7 , dissolve 0.03 mol of ferrous chloride and 2 g of ascorbic acid in 80 mL of deionized water, stir evenly, and slowly add 0.06 mol of ammonium dihydrogen phosphate with vigorous stirring to obtain a mixed solution;
[0059] (2) Dissolve 0.03 mol of sodium acetate in 10 mL of deionized water, drop into the resulting mixed solution in step (1) at a constant speed, and then add 15 g of triethanolamine. After the solution changes from off-white to dark green, add The solution was transferred to a hydrothermal reactor, reacted at 200°C for 20h, and then the product was transferred to a water bath at 80°C to evaporate the solution, and the obtained solid was vacuum-dried in a vacuum drying oven for 24h;
[0060] (3) The precursor obtained in step (2) is ground evenly and then sintered at 300 °C under the protection of a hydrogen-argon mix...
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Abstract
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