A preparation method of carbon-coated lithium ferrous silicate composite positive electrode material
A composite positive electrode material, lithium ferrous silicate technology, applied in the direction of positive electrode, battery electrode, active material electrode, etc., can solve the problems of complex process, long production cycle, high cost, etc., and achieve simplified process flow, high consistency, The effect of reducing production costs
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0021] 1) First weigh 0.02mol of LiOH and 0.01mol of Si(C 2 h 5 O) 4 Dissolve in 30mL of deionized water and 30mL of ethanol respectively, Si(C 2 h 5 O) 4 Slowly add the ethanol solution of LiOH to the aqueous solution of LiOH, reflux at 50°C for 10 hours to obtain a white paste, and then place the product in an oven at 120°C to dry for 24 hours to obtain Li 2 SiO 3 Precursor;
[0022] 2) Li prepared in step 1 2 SiO 3 Add 0.005mol of Fe to the precursor 2 o 3 and 1.71g of sucrose, placed in an agate jar, using ethanol as a dispersant, setting the rotation speed at 400r / min, ball milling for 5 hours, taking out the slurry, drying it with an infrared lamp, and passing it through a 200-mesh sieve to obtain the precursor powder;
[0023] 3) Put the precursor powder prepared in step 2 into a porcelain boat and place it in a tube furnace, and use N 2 As a protective gas, the temperature was raised to 600°C at a heating rate of 3°C / min, kept for 12 hours, and naturally coo...
Embodiment 2
[0027] First weigh 0.02mol of LiOH and 0.01mol of Si(C 2 h 5 O) 4 Dissolve in 30mL of deionized water and 30mL of ethanol respectively, Si(C 2 h 5 O) 4 Slowly add the ethanol solution of LiOH into the aqueous solution of LiOH, reflux at 50°C for 10 hours to obtain a white paste, dry the product in an oven at 120°C for 24 hours, and then add 0.005mol Fe 2 o 3 and 0.3g polyethylene glycol and 1.71g sucrose, placed in an agate jar with ethanol as a dispersant, set the speed at 400r / min, ball milled for 5 hours, dried with an infrared lamp to obtain a precursor, passed through a 200-mesh sieve, and passed through a 200-mesh sieve in a tube N 2 For the protective gas, the temperature was raised to 600°C at a heating rate of 3°C / min and sintered for 12 hours to obtain Li 2 FeSiO 4 / C composite cathode material. The cycle performance of the test sample at 0.2C rate is as follows: Figure 5 As shown, the first discharge specific capacity is 150.6mAh / g.
Embodiment 3
[0029] Weigh 0.02mol of LiOH and 0.01mol of Si(C 2 h 5 O) 4 Dissolve in 30mL of deionized water and 30mL of ethanol respectively, Si(C 2 h 5 O) 4 Slowly add the ethanol solution of LiOH into the aqueous solution of LiOH, reflux at 50°C for 10 hours to obtain a white paste, dry the product in an oven at 120°C for 24 hours, and then add 0.005mol of Fe 2 o 3 and 0.3g of polyethylene glycol and 0.72g of acetylene black, placed in an agate jar with ethanol as a dispersant, set the speed at 400r / min, ball milled for 5 hours, dried with an infrared lamp to obtain a precursor, passed through a 200-mesh sieve, and N in the tube furnace 2 For the protective gas, the temperature was raised to 600°C at a heating rate of 3°C / min and sintered for 12 hours to obtain Li 2 FeSiO 4 / C composite cathode material. The cycle performance of the test sample at 0.2C rate is as follows: Figure 5 As shown, the first discharge specific capacity is 122.0mAh / g.
[0030] The above-mentioned exa...
PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
Login to View More