Cathode material for sodium ion battery, and preparation method of cathode material
A technology for sodium ion batteries and negative electrode materials, applied in battery electrodes, secondary batteries, circuits, etc., can solve the problems of high cost, low capacity, and poor cycle stability, and achieve low cost, high specific capacity, and simple preparation methods Effect
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Embodiment 1
[0028] Weigh 1.0g of 1,4,5,8-naphthalene tetracarboxylic anhydride and 1.0g of sulfur powder and mix them with an agate mortar for 30 minutes, then heat to 500°C at a heating rate of 2°C / min under an argon atmosphere, and Insulated for 4h, after the reaction finished, a kind of sodium ion battery negative electrode material described in the present embodiment 1 was obtained, and the X-ray diffraction pattern of the prepared material was as follows figure 1 shown. figure 1 It shows that the prepared material is an amorphous carbon composite. The elemental analysis results of the prepared materials are shown in Table 1. Table 1 shows that the sulfur content in the prepared material was 25.67 wt%. figure 2 It is the topography diagram of the prepared electrode material, which shows that the prepared electrode material is a three-dimensional structure material. The prepared electrode material was used as the positive electrode, the metal sodium sheet was used as the negative e...
Embodiment 2
[0032] Weigh 1.0g of 1,4,5,8-naphthalene tetracarboxylic anhydride and 0.5g of sulfur powder and mix them with an agate mortar for 30 minutes, then heat to 500°C at a heating rate of 2°C / min under an argon atmosphere, and Keeping it warm for 4 hours, after the reaction, a negative electrode material for a sodium ion battery described in Example 2 was obtained. The prepared electrode material is assembled into a button cell to test its electrochemical performance according to the method in Example 1, and the charge-discharge curve is as follows Figure 4 shown. Figure 4 It shows that the prepared electrode is charged and discharged in the range of 0.01-3V at a current density of 20mA / g, and the reversible capacity reaches 330mAh / g.
Embodiment 3
[0034] Weigh 1.0g of 1,4,5,8-naphthalene tetracarboxylic anhydride and 1.0g of sulfur powder and mix them with an agate mortar for 30 minutes, then heat to 600°C at a heating rate of 2°C / min under an argon atmosphere, and Keeping it warm for 4 hours, after the reaction, the electrode material for a sodium ion battery described in Example 3 was obtained. The prepared electrode material is assembled into a button cell to test its electrochemical performance according to the method in Example 1, and the charge-discharge cycle performance is as follows: Figure 5 shown. Figure 5 It shows that the reversible capacity of the prepared electrode material can still reach 180mAh / g after 100 cycles of charging and discharging in the range of 0.01-3V with a current density of 1A / g.
PUM
Login to View More Abstract
Description
Claims
Application Information
Login to View More