Preparation method of LiFePO4 film lithium ion battery anode with dispersed nano-silver particles
A technology of nano-silver particles and lithium-ion batteries, which is applied in the field of electrochemistry, can solve problems such as unsuitable for high-current charging and discharging, poor electronic and ion conductivity, etc., to improve the discharge area specific capacity and cycle performance, and improve electronic conductivity , film dense effect
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example 1
[0016] Weigh 0.55 grams of lithium acetate, a certain amount of ferrous oxalate, and dissolve in 7.2 grams of deionized water, stir the mixture evenly to obtain liquid A; then weigh 7.2 grams of deionized water, phosphoric acid, and silver nitrate powder, mix Stir continuously until silver nitrate and complexing agent are all dissolved to obtain liquid B, wherein lithium acetate: ferrous oxalate: phosphoric acid: silver nitrate: mol ratio of glacial acetic acid=0.504: 1: 1: 0.01: 2; liquid A and After liquid B is mixed, continue to stir until the precursor sol with stable color is obtained, and then put the sol at room temperature to age for use; when uniforming the film, drop the solution onto the substrate. First run at 200rpm for 5 seconds, then run at 2000rpm for 15 seconds. After each glue leveling, the film was thermally decomposed at 260°C for 60 seconds, after 20 times of glue leveling, the sample was placed in H 2 Annealing treatment was carried out in the atmosphere...
example 2
[0019] Take by weighing 0.4 grams of lithium carbonate, a certain amount of ferrous acetate, ammonium dihydrogen phosphate, and dissolve in 7.2 grams of deionized water, stir the mixture to obtain liquid A; then weigh 7.2 grams of deionized water, citric acid and Silver nitrate powder, after mixing, keep stirring until silver nitrate and complexing agent are all dissolved to obtain liquid B, wherein the mol ratio of lithium carbonate: ferrous acetate: ammonium dihydrogen phosphate: silver nitrate: citric acid=0.504: 1: 1 : 0.08: 2; Mix liquid A and liquid B and continue to stir until a precursor sol with stable color is obtained, then place the sol at room temperature to age for use; when uniforming the film, drop the solution onto the substrate. First run at 1000rpm for 20 seconds, then run at 5000rpm for 50 seconds. After each glue leveling, the film was thermally decomposed at 400°C for 300 seconds, and after 60 times of glue leveling, the sample was placed in H 2 Annealin...
example 3
[0022] Take by weighing 0.55 grams of lithium acetate and a certain amount of ferrous oxalate, and dissolve them in 7.2 grams of deionized water, stir the mixture evenly to obtain liquid A; then weigh 7.2 grams of deionized water, a certain amount of diammonium hydrogen phosphate, Glacial acetic acid and silver nitrate powder, after mixing, keep stirring until they are completely dissolved to obtain liquid B, wherein the molar ratio of lithium acetate: ferrous oxalate: diammonium hydrogen phosphate: silver nitrate: glacial acetic acid=0.504: 1: 1: 0.16: 2. Mix liquid A and liquid B and continue to stir until the precursor sol with stable color is obtained, and then age the sol at room temperature for use; when uniforming the film, drop the solution onto the substrate. First run at 300rpm for 15 seconds, then at 3000rpm for 40 seconds. After each gluing, the film was thermally decomposed at 350°C for 100 seconds. After 50 times of gluing, the sample was placed in H 2 Annealing...
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