High-performance lithium-ion battery negative electrode structure and preparation method thereof
A lithium-ion battery, high-performance technology, applied in battery electrodes, active material electrodes, negative electrodes, etc., can solve the problems of material rate performance, low temperature performance and adverse effects of cycle performance, etc., to improve the first efficiency and energy density. , the effect of improving cycle performance
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0015] A high-performance lithium-ion battery negative electrode structure, including an inner core and an outer shell, the inner core is composed of graphite, the outer shell includes red phosphorus, carbon nanotubes, inorganic lithium compounds and binders, and the thickness ratio of the inner core to the outer shell is 20:X, Where X is greater than or equal to 1 and less than or equal to 4.
[0016] Wherein, the weight ratio of red phosphorus, carbon nanotubes, inorganic lithium compound and binder is A:B:C:D, wherein, 60≤A≤70, 5≤B≤10, 5≤C≤10, 10 ≤D≤30. The binder includes the following components and their weight ratios: 6-8 parts of polyvinylidene fluoride, 2-4 parts of polyamide, and 50 parts of N-methylpyrrolidone. The inorganic lithium compound is one or more of lithium metaaluminate, lithium carbonate and lithium hydroxide.
[0017] Specifically, the preparation method of the negative electrode of the lithium ion battery is:
[0018] Prepare red phosphorus mixed so...
Embodiment 2
[0021] Based on the above structure and preparation method, this embodiment discloses a specific implementation.
[0022] Prepare red phosphorus mixed solution: weigh 7g of polyvinylidene fluoride and 3g of polyamide, add them to 50g of N-methylpyrrolidone, and disperse uniformly at high speed to obtain a binder with a solid content of 20%; weigh 65g of red phosphorus and 8g of carbon Add nanotubes, 20g of inorganic lithium compound and 500g of N-methylpyrrolidone to 40g of binder, and disperse for 2 hours through a high-speed disperser to obtain a red phosphorus mixed solution;
[0023] Graphite coating: Weigh 500g of graphite and add it to the red phosphorus mixed solution, stir at 80°C for 2h, transfer to a tube furnace, and raise the temperature to 250°C at a heating rate of 5°C / min under nitrogen protective gas, and Keep warm for 2h, then raise the temperature to 1200°C at 5°C / min, keep warm for 2h, and then cool down naturally to room temperature.
[0024] The scanning ...
Embodiment 3
[0026] Based on the structure and preparation method of Example 1, this example discloses a specific implementation.
[0027] Prepare red phosphorus mixed solution: weigh 6g of polyvinylidene fluoride and 4g of polyamide, add them to 50g of N-methylpyrrolidone, and disperse uniformly at high speed to obtain a binder with a solid content of 20%; weigh 60g of red phosphorus, 5g of carbon Add nanotubes, 30g of inorganic lithium compound and 500g of N-methylpyrrolidone to 25g of binder, and disperse for 2 hours through a high-speed disperser to obtain a red phosphorus mixed solution;
[0028] Graphite coating: Weigh 500g of graphite and add it to the red phosphorus mixed solution, stir at 80°C for 2h, transfer to a tube furnace, and raise the temperature to 200°C at a rate of 1°C / min under nitrogen protection gas, and Keep warm for 1h, then raise the temperature to 1000°C at 1°C / min, keep warm for 1h, and then cool down naturally to room temperature.
PUM
| Property | Measurement | Unit |
|---|---|---|
| Particle size | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More