Nitrogen and phosphorus co-doped carbon coated MoO3-x and preparation method thereof
A co-doping, carbon-coated technology, applied in active material electrodes, electrical components, electrochemical generators, etc., can solve the problem that electrospinning cannot be mass-produced, the preparation of spinning slurry is complicated, and the electrochemical stability is insufficient. problems, to achieve the effect of loose experimental conditions, improved purity, and low cost
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[0025] The invention relates to a carbon-coated MoO co-doped with nitrogen and phosphorus 3-x The preparation method includes the following steps:
[0026] (1) Add phosphomolybdic acid to deionized water and stir evenly to prepare a phosphomolybdic acid solution with a concentration of 1~2.5mg / ml;
[0027] (2) Add N-methylimidazole to the phosphomolybdic acid solution, the molar ratio of the added N-methylimidazole to the step (1) phosphomolybdic acid is 3:1, stir for 7-12h to obtain a yellow precipitate;
[0028] (3) Centrifugally separate the yellow precipitate of step (2) to obtain the separated product. Wash the separated product with a mixed solution of cyclohexane and ethanol 3-5 times to remove impurities to obtain a reaction product. The volume ratio is (2-5):1.
[0029] (4) Vacuum drying the reaction product obtained in step (3) for 7-10 hours at a drying temperature of 40-70°C to obtain a dried product.
[0030] (5) The dried product obtained in step (4) is calcined under an ...
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[0032] Example 1
[0033] 1) Add 100mg of phosphomolybdic acid to 40mL of deionized water and stir evenly to prepare a phosphomolybdic acid solution with a concentration of 2.5mg / mL;
[0034] 2) Add 12.4 mg of N-methylimidazole to the phosphomolybdic acid solution and stir for 7 hours to obtain a yellow precipitate;
[0035] 3) Centrifuge the yellow precipitate to obtain a centrifuged product, wash the centrifuged product with a mixed solution of cyclohexane and ethanol 3 times to remove impurities to obtain a reaction product; wherein the volume ratio of cyclohexane and ethanol is 3:1;
[0036] 4) Vacuum drying the reaction product obtained in step 3) at 50° C. for 7 hours to obtain a dried product;
[0037] 5) The dried product of step 4) was calcined in an argon atmosphere for 2 hours at a calcining temperature of 400°C to obtain nitrogen-phosphorus co-doped carbon coated MoO 3-x nanomaterials.
[0038] Nitrogen and phosphorus co-doped carbon coated MoO prepared by the data of this em...
Example Embodiment
[0039] Example 2
[0040] 1) Add 100 mg of phosphomolybdic acid to 50 mL of deionized water, and stir evenly to prepare a phosphomolybdic acid solution with a concentration of 2 mg / mL;
[0041] 2) Add 12.4 mg of N-methylimidazole to the phosphomolybdic acid solution and stir for 12 hours to obtain a yellow precipitate;
[0042] 3) Centrifuge the yellow precipitate to obtain a centrifuged product, wash the centrifuged product with a mixed solution of cyclohexane and ethanol 5 times to remove impurities to obtain a reaction product; wherein the volume ratio of cyclohexane and ethanol is 3:1;
[0043] 4) Vacuum drying the reaction product obtained in step 3) at 50°C for 8 hours to obtain a dried product;
[0044] 5) The dried product of step 4) was calcined in an argon atmosphere for 2 hours at a calcining temperature of 400°C to obtain nitrogen-phosphorus co-doped carbon coated MoO 3-x nanomaterials.
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