Carbon-decorated porous lithium vanadium phosphate nanosphere material as well as preparation method and application thereof
A technology of lithium vanadium phosphate and nanospheres, which is applied in the field of nanomaterials and electrochemistry, can solve problems such as complex preparation methods, electrochemical performance needs to be improved, and is not conducive to material industrialization, and achieves simple process, favorable for market promotion, and easy Amplified effect
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[0034] Example 1
[0035] Preparation method of carbon modified porous lithium vanadium phosphate nanosphere material, such as figure 1 shown, it includes the following steps:
[0036] 1) 1.78 vanadium pentoxide (V 2 O 5 ) and 3.696g oxalic acid (C 2 H 2 O 4 ) was added to 40 mL of distilled water (V 2 O 5 Molar ratio with oxalic acid 1:3), mix and stir at 80°C for 10 minutes to obtain VOC 2 O 4 blue solution;
[0037] 2) Measure 85% phosphoric acid (H 3 PO 4 ) solution (2mL), drop phosphoric acid dropwise into the blue solution obtained in step 1), stir evenly;
[0038] 3) Weigh 3.142g of lithium acetate dihydrate (LiAc, the actual amount of lithium source is 1.05 times the required reaction amount) powder, dissolve in 30mL of distilled water, and drop into the blue solution obtained in step 2) after dissolving;
[0039] 4) Weigh 5 mL of ethylene glycol with a mol ratio of 1:9.12 to vanadium pentoxide, add dropwise to the solution obtained in step 3), and stir ev...
Example Embodiment
[0049] Example 2
[0050] 1) 1.78 vanadium pentoxide (V 2 O 5 ) and 3.696g oxalic acid (C 2 H 2 O 4 ) was added to 40 mL of distilled water (V 2 O 5 Molar ratio with oxalic acid 1:3), mix and stir at 80°C for 10 minutes to obtain VOC 2 O 4 blue solution;
[0051] 2) Take by weighing the ammonium dihydrogen phosphate (NHP) with a molar ratio of 1:3 to vanadium pentoxide. 4 H 2 PO 4 ) 3.38g, dissolved in 10mL of distilled water, dropped the solution dropwise into the blue solution obtained in step 1), and stirred evenly;
[0052] 3) Weigh 1.14g of lithium carbonate (Li 2 CO 3 , the actual consumption of the lithium source is 1.05 times the required reaction amount) powder, dissolved in 30 mL of distilled water, and dropped into the blue solution obtained in step 2) after dissolving;
[0053] 4) Weigh 4.39 mL of ethylene glycol with a mol ratio of 1:8 to vanadium pentoxide, add dropwise to the solution obtained in step 3), and stir evenly;
[0054] 5) Weigh 3.93 mL...
Example Embodiment
[0059] Example 3
[0060] 1) 1.78 vanadium pentoxide (V 2 O 5 ) and 3.696g oxalic acid (C 2 H 2 O 4 ) was added to 40 mL of distilled water (V 2O 5 Molar ratio with oxalic acid 1:3), mix and stir at 80°C for 10 minutes to obtain VOC 2 O 4 blue solution;
[0061] 2) Take by weighing the ammonium dihydrogen phosphate (NHP) with a molar ratio of 1:3 to vanadium pentoxide. 4 H 2 PO 4 ) 3.38g, dissolved in 10mL of distilled water, dropped the solution dropwise into the blue solution obtained in step 1), and stirred evenly;
[0062] 3) Weigh 2.13g lithium nitrate (LiNO 3 , the actual consumption of the lithium source is 1.05 times the required reaction amount) powder, dissolved in 30 mL of distilled water, and dropped into the blue solution obtained in step 2) after dissolving;
[0063] 4) Weigh 5.48mL of ethylene glycol with a molar ratio of 1:10 to vanadium pentoxide, add dropwise to the solution obtained in step 3), and stir evenly;
[0064] 5) Weigh 5.89 mL of ethy...
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