Sodium-sulfur battery positive electrode material with high specific capacity, and preparation method thereof
A positive electrode material, sodium-sulfur battery technology, applied in the direction of battery electrodes, positive electrodes, secondary batteries, etc., can solve the problems of obvious shuttle effect, poor cycle stability, low sulfur loading capacity, etc., achieve shortened transmission path, good cycle life , the effect of high specific capacity
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Embodiment 1
[0026] The anode material for a sodium-sulfur battery with high specific capacity is a sulfur-cobalt-iron oxide composite material, wherein the cobalt-iron oxide has a sea urchin-like hollow sphere structure.
[0027] The preparation method of the high specific capacity sodium-sulfur battery cathode material comprises the following steps:
[0028] (1) Preparation of cobalt-iron oxide with sea urchin-like hollow sphere structure: First, after dissolving 15g of glucose, 8g of cobalt nitrate and 2g of ferric nitrate in 150mL of deionized water, they were placed in a reaction kettle for hydrothermal reaction at 220°C for 18 hours. After completion, cool at room temperature to obtain a suspension; then centrifuge the obtained suspension to collect the product, wash it with deionized water three times, and dry it at 60°C to obtain cobalt-iron oxide powder for later use; finally, place the obtained cobalt-iron oxide powder in In the muffle furnace, the temperature is raised to 500°C ...
Embodiment 2
[0032] The preparation method of the high specific capacity sodium-sulfur battery cathode material is characterized in that it comprises the following steps:
[0033] (1) Preparation of cobalt iron oxide with a sea urchin-like hollow sphere structure: firstly, after dissolving 10 g of glucose, 5 g of cobalt nitrate and 1 g of ferric nitrate in 100 mL of deionized water, they were placed in a reaction kettle for hydrothermal reaction at 200 °C for 12 hours, and the reaction After completion, cool at room temperature to obtain a suspension; then centrifuge the obtained suspension to collect the product, wash it with deionized water three times, and dry it at 60°C to obtain cobalt-iron oxide powder for later use; finally, place the obtained cobalt-iron oxide powder in In the muffle furnace, the temperature is raised to 400°C at a heating rate of 1°C / min under air conditions, and after holding for 1 hour, it is cooled with room temperature to obtain cobalt iron oxide with a sea urc...
Embodiment 3
[0036] The preparation method of the high specific capacity sodium-sulfur battery cathode material is characterized in that it comprises the following steps:
[0037](1) Preparation of cobalt iron oxide with a sea urchin-like hollow sphere structure: firstly, after dissolving 20 g of glucose, 10 g of cobalt nitrate and 3 g of ferric nitrate in 200 mL of deionized water, they were placed in a reaction kettle for hydrothermal reaction at 240 °C for 24 hours, and the reaction After completion, cool at room temperature to obtain a suspension; then centrifuge the obtained suspension to collect the product, wash it with deionized water three times, and dry it at 60°C to obtain cobalt-iron oxide powder for later use; finally, place the obtained cobalt-iron oxide powder in In the muffle furnace, the temperature is raised to 600°C at a heating rate of 5°C / min under air conditions, and after 2 hours of heat preservation, it is cooled with room temperature to obtain cobalt iron oxide with...
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