Graphite negative electrode material with surface coated titanium nitride conductive network film and preparation method thereof
A graphite negative electrode and conductive network technology, which is applied to battery electrodes, circuits, electrical components, etc., can solve the problems of limited application of graphite negative electrode materials, and the improvement of high-current charge and discharge performance is not obvious, so as to achieve excellent electrochemical performance and easy The effect of large-scale production and low cost
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0020] Dissolve 9.7g of urea and 25.8g of titanium dioxide in 100mL of water, put 980g of graphite in the ball mill, then add the prepared urea and titanium dioxide solution, ball mill and mix for 5h, and then put it in a vacuum drying oven at 90°C for 6h. After drying, the temperature was raised to 850°C for 5 hours at a rate of 5°C / min under a nitrogen protective atmosphere in an atmosphere furnace, and then cooled with the furnace. The obtained product is a graphite negative electrode material coated with a dense TiN conductive mesh film. The weight of TiN is about 1.8% of that of graphite, and the conductivity of graphite before and after coating is from l0 -6 S / cm increased to 10 -3 S / cm order of magnitude, tap density is 1.75g / cm 3 .
[0021] figure 1 It is a scanning electron microscope photo of a graphite negative electrode material coated with a dense TiN conductive mesh. The surface of the graphite particles is smooth, and the TiN coating is dense and has a high ...
Embodiment 2
[0024] Dissolve 9.7g of urea and 11.6g of titanium hydroxide in 100mL of organic acid, put 980g of graphite in the ball mill, then add the prepared urea and titanium dioxide solution, ball mill and mix for 5h, then put it in a vacuum drying oven at 90°C for 6h . After drying, the temperature was raised to 850°C for 5 hours at a rate of 5°C / min under a nitrogen protective atmosphere in an atmosphere furnace, and then cooled with the furnace. The obtained product is a graphite negative electrode material coated with a dense TiN conductive mesh film. The weight of TiN is about 1.9% of that of graphite, and the conductivity of graphite before and after coating is from l0 -6 S / cm increased to 10 -3 S / cm order of magnitude, tap density is 1.75g / cm 3 , when discharged at 0.2C, the reversible specific capacity is as high as 355mAh / g, which is 95% of the theoretical specific capacity. The specific capacities of the obtained products were 353, 349 and 316mAh / g when discharged at 1C,...
Embodiment 3
[0026] Dissolve 9.7g of urea and 34.0g of butyl titanate in 100mL of acetone, put 980g of graphite in the ball mill, then add the prepared urea and titanium dioxide solution, mix by ball milling for 5h, and then put it in a vacuum drying oven at 90°C for 6h . After drying, the temperature was raised to 850°C for 5 hours at a rate of 5°C / min under a nitrogen protective atmosphere in an atmosphere furnace, and then cooled with the furnace. The obtained product is a graphite negative electrode material coated with a dense TiN conductive mesh film. The weight of TiN is about 1.65% of that of graphite, and the conductivity of graphite before and after coating is from l0 -6 S / cm increased to 10 -3 S / cm order of magnitude, tap density is 1.75g / cm 3 , when discharged at 0.2C, the reversible specific capacity is as high as 357mAh / g, which is 96% of the theoretical specific capacity. The specific capacities of the obtained products were 356, 353 and 321mAh / g when discharged at 1C, 1...
PUM
| Property | Measurement | Unit |
|---|---|---|
| electrical conductivity | aaaaa | aaaaa |
| density | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More