Positive host material and preparation method and application thereof
A technology of host materials and positive active materials, applied in battery electrodes, electrical components, non-aqueous electrolyte batteries, etc., can solve problems such as low active material utilization, commercialization process limitations, low electronic conductivity, etc. The effect of large-scale production application, promotion of rapid transformation, and simple preparation method
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Embodiment 1
[0063] This embodiment provides a method for preparing a positive electrode host material, comprising the following steps:
[0064] (1) Dissolve 0.874g of zinc nitrate hexahydrate, 0.549g of ferrous chloride tetrahydrate and 0.75g of ascorbic acid in 80mL of deionized water, stir until the solution is clear, and obtain a light green solution;
[0065] (2) 3.936 g of 2-methylimidazole was dissolved in 80 mL of deionized water, and stirred until the solution was clear to obtain an aqueous solution of 2-methylimidazole;
[0066] (3) Pour the 2-methylimidazole aqueous solution obtained in step (2) into the light green solution obtained in step (1) to obtain a dark brown solution, and leave it for 24 hours to obtain a pre-product;
[0067] (4) The pre-product obtained in step (3) is suction filtered to remove the supernatant, and the obtained precipitate is dispersed in the ethanol / water mixed solution, then suction filtered, and washed repeatedly for four times until the precipita...
Embodiment 2
[0072] (1) Dissolve 0.582g of zinc nitrate hexahydrate, 0.396g of ferrous chloride tetrahydrate and 0.75g of ascorbic acid in 80mL of deionized water, stir until the solution is clear, and obtain a light green solution;
[0073] (2) 3.936 g of 2-methylimidazole was dissolved in 80 mL of deionized water, and stirred until the solution was clear to obtain an aqueous solution of 2-methylimidazole;
[0074] (3) Pour the 2-methylimidazole aqueous solution obtained in step (2) into the light green solution obtained in step (1) to obtain a dark brown solution, and leave it for 24 hours to obtain a pre-product;
[0075] (4) The pre-product obtained in step (3) is suction filtered to remove the supernatant, and the obtained precipitate is dispersed in the ethanol / water mixed solution, then suction filtered, and washed repeatedly for four times until the precipitate becomes light yellow completely, and the Placed in a blast drying oven at 60°C for 12 hours to obtain the flower-like prec...
Embodiment 3
[0080] (1) Dissolve 0.582g of zinc nitrate hexahydrate, 0.792g of ferrous sulfate and 0.75g of ascorbic acid in 80mL of deionized water, stir until the solution is clear, and obtain a light green solution;
[0081] (2) 3.936 g of 4-methylimidazole was dissolved in 80 mL of deionized water, and stirred until the solution was clear to obtain an aqueous solution of 4-methylimidazole;
[0082] (3) Pour the 4-methylimidazole aqueous solution obtained in step (2) into the light green solution obtained in step (1) to obtain a dark brown solution, and leave it to stand for 48 hours to obtain a pre-product;
[0083] (4) The pre-product obtained in step (3) is suction filtered to remove the supernatant, and the obtained precipitate is dispersed in the ethanol / water mixed solution, then suction filtered, and washed repeatedly for four times until the precipitate becomes light yellow completely, and the Place in a blast drying oven at 50°C and dry for 24 hours to obtain a flower-like prec...
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