A carbon-coated bimetallic olivine phase cobalt manganese lithium phosphate material, its preparation method and application
A phase-cobalt-manganese-lithium phosphate, bimetallic technology, applied in the field of electrolysis of water catalysis, can solve problems such as easy agglomeration, impure crystal phase, uneven samples, etc.
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[0058] The present invention also provides a method for preparing the carbon-coated bimetallic olivine phase cobalt manganese lithium phosphate nanomaterial described in the above technical solution, comprising the following steps:
[0059] a) LiOH and NH 4 h 2 PO 4 Dissolve in water to obtain solution A;
[0060] b) Mn(CH 3 COO) 2 , Co(CH 3 COO) 2 and the carbon source compound are dissolved in a solvent to obtain a solution B;
[0061] c) mixing and bubbling the solution A and solution B, spray drying after pre-drying, to obtain a precursor powder;
[0062] d) calcining the precursor powder to obtain a carbon-coated bimetallic olivine phase cobalt manganese lithium phosphate nanomaterial;
[0063] The steps a) and b) are not limited in sequence.
[0064] In the prior art, compared with spinel and two-dimensional layered materials, olivine-type lithium phosphate-based materials are more difficult to prepare, and it is difficult to obtain materials with pure crystal p...
Embodiment 1
[0089] 1.1 Sample preparation
[0090] S1. Weigh 0.6gLiOH and 2.87gNH 4 h 2 PO 4 Dissolve in 50 mL of deionized water, sonicate for 10 minutes until completely dissolved to obtain solution A.
[0091] Weigh 1.53g Mn(CH 3 COO) 2 , 3.32g Co(CH 3 COO) 2 and 5.25g C 6 h 8 o 7 ·H 2 O was dissolved in another beaker containing 45 mL of deionized water, and after ultrasonic treatment for 20 minutes, after it was completely dissolved, 5 mL of ethylene glycol was added and stirred for 10 minutes to obtain solution B.
[0092] S2. Mix the above-mentioned solution A and solution B into a sample bottle with a volume of 100mL, and inject N 2 After bubbling for 30 minutes, seal the bottle mouth, put it in a 70°C oven for 2 hours to generate a transparent solution, transfer it to the spray drying equipment, set the temperature of the sample chamber at 220°C, and the temperature of the spray chamber at 120°C, and dry The final sample powder is collected for use.
[0093] S3. Put ...
Embodiment 2
[0120] 1.1 Sample preparation
[0121] S1. Weigh 0.3gLiOH and 1.43gNH 4 h 2 PO 4 Dissolve in 20 mL of deionized water, sonicate for 15 minutes until completely dissolved to obtain solution A.
[0122] Weigh 0.77gMn(CH 3 COO) 2 , 1.66g Co(CH 3 COO) 2 and 2.62g C 6 h 8 o 7 ·H 2 O was dissolved in another beaker with 17 mL of deionized water. After ultrasonic treatment for 15 minutes, after it was completely dissolved, 3 mL of ethylene glycol was added and stirred for 15 minutes to obtain solution B.
[0123] S2. Mix the above-mentioned configured solution A and solution B into a sample bottle with a volume of 50mL, and inject N 2 After bubbling for 40 minutes, seal the bottle mouth, leave it in an oven at 80°C for 2.5 hours to generate a transparent solution, transfer it to the spray drying equipment, set the temperature of the sample chamber at 200°C, and the temperature of the spray chamber at 130°C, and dry The final sample powder is collected for use.
[0124] S...
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