Modified lithium ion battery cathode material and preparation method thereof
A technology of lithium ion battery and positive electrode material, applied in battery electrodes, active material electrodes, positive electrodes, etc., can solve problems such as capacity reduction, and achieve the effect of improving charge-discharge performance and cycle performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Examples
preparation example Construction
[0017] The present invention provides a kind of preparation method of positive electrode material of modified lithium ion battery, wherein, described preparation method comprises:
[0018] 1) In the presence of the first solvent, sodium thiosulfate, sodium dodecylbenzenesulfonate and sodium silicate are mixed to obtain a mixture M1;
[0019] 2) adding carbon nanotubes to the mixture M1 and stirring to prepare the mixture M2;
[0020] 3) adding hydrochloric acid solution dropwise to the mixture M2 to prepare the mixture M3;
[0021] 4) Mix the mixture M3 with sodium p-toluene sulfonate, N-vinylpyrrolidone and ferric chloride and let it stand still, then suction filter, take the filter residue and dry it to obtain a modified material;
[0022] 5) In the presence of the second solvent, the lithium salt, the cobalt salt and the citric acid are mixed, and dried at a temperature of 170-200° C. to obtain a precursor;
[0023] 6) The modified material and the precursor are mixed and...
Embodiment 1
[0040] 1) In the presence of 150 mL of water, mix 10 g of sodium thiosulfate, 1 g of sodium dodecylbenzenesulfonate and 3 g of sodium silicate to prepare a mixture M1;
[0041] 2) Add 0.1 g of carbon nanotubes (soaked in a nitric acid solution with a concentration of 10 mol / L for 25 minutes) into the mixture M1 and stir with ultrasonic oscillation to prepare the mixture M2;
[0042] 3) Add 80 mL of hydrochloric acid solution (concentration: 2 mol / L) dropwise at a rate of 100 drops / min to the mixture M2 to prepare the mixture M3;
[0043] 4) Mix the mixture M3 with 0.1g sodium p-toluenesulfonate, 0.1g N-vinylpyrrolidone and 0.5g ferric chloride and let it stand, then suction filter and wash, take the filter residue and dry it to obtain the modified Material;
[0044] 5) In the presence of 100 mL of ethanol, mix 0.05 mol of lithium nitrate, 0.05 mol of cobalt nitrate and 5 g of citric acid, and dry at a temperature of 170 ° C to obtain a precursor;
[0045] 6) The modified mat...
Embodiment 2
[0047] 1) In the presence of 200mL of water, mix 10g of sodium thiosulfate, 3g of sodium dodecylbenzenesulfonate and 6g of sodium silicate to prepare a mixture M1;
[0048] 2) Add 0.5 g of carbon nanotubes (soaked in a nitric acid solution with a concentration of 10 mol / L for 25 min) into the mixture M1 and stir with ultrasonic oscillation to prepare the mixture M2;
[0049] 3) Add 120 mL of hydrochloric acid solution (concentration: 2 mol / L) dropwise at a rate of 200 drops / min to the mixture M2 to prepare the mixture M3;
[0050] 4) Mix the mixture M3 with 0.2g of sodium p-toluenesulfonate, 0.2g of N-vinylpyrrolidone and 2g of ferric chloride and let it stand, then suction filter and wash, take the filter residue and dry it to obtain a modified material ;
[0051] 5) In the presence of 100 mL of ethanol, mix 0.10 mol of lithium nitrate, 0.10 mol of cobalt nitrate and 10 g of citric acid, and dry at a temperature of 200 ° C to obtain a precursor;
[0052] 6) After mixing the...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More