Preparation and application of potassium ion battery electrode material
A battery electrode, potassium ion technology, applied in battery electrodes, negative electrodes, secondary batteries and other directions, can solve the problems of large stress, large volume change, poor electrochemical performance, etc., to reduce the use, the preparation method is simple, and the excellent The effect of cycle performance and rate performance
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Embodiment 1
[0043]Mix 1.47216g of niobium powder and 2.52672g of selenium powder by manual grinding for 1 hour, vacuum-seal the selenium powder and niobium powder in a quartz tube, then raise the temperature to 750°C at a rate of 3°C / min in a tube furnace and keep the temperature constant After keeping for 3 hours, it was naturally cooled to room temperature to obtain the product niobium diselenide material. The purity of the product is 100%, and the yield of the product is 94%. The loss of the product occurs during the transfer and collection. figure 2 It is the SEM image of the prepared niobium diselenide material.
[0044] figure 1 It is the XRD spectrum of the niobium diselenide material, as can be seen from the figure, the peak position of the XRD spectrum of the material is well consistent with the peak position and peak intensity on the standard card (JCPDS No.72-0864), indicating that the preparation The composition of the obtained material is pure phase NbSe 2 . image 3 It ...
Embodiment 2
[0046] 0.93g of niobium powder and 1.975g of selenium powder are mixed evenly by ball milling, and after drying, they are packed in a vacuum quartz tube, sealed by a quartz plug, and then used for secondary plug protection with a furnace plug. Then, the tube furnace was pre-passed with nitrogen for half an hour, and after exhausting the air, the tube furnace was sealed. Then in a tube furnace, the temperature was raised to 700° C. at a rate of 5° C. / min and kept at a constant temperature for 3 hours, and then naturally cooled to room temperature to obtain the product niobium diselenide material with a product purity of 100% and a product yield of 93%.
[0047] The tube furnace model used is Henan Sante Furnace Industry STGK-60-12, and the matching furnace plug size is 58mm×100mm. The manufacturer of the quartz tube and quartz plug is Junhua Quartz. Specifications of necked quartz tube: 250mm×20mm×1.5mm×160mm (length*outer diameter*thickness*neck position), quartz plug: 16mm×10...
Embodiment 3
[0049] Mix 1.1g of niobium powder and 2.2g of selenium powder evenly by magnetic force, and after drying, put it in a vacuum quartz tube, seal it with a quartz plug, and then use a furnace plug for secondary sealing protection. After pre-passing for half an hour under argon atmosphere, the tube furnace was sealed. The tube furnace was heated up to 800°C at a rate of 15°C / min and kept at a constant temperature for 10 hours, and then naturally cooled to room temperature to obtain the product niobium diselenide material. The product purity is 100%, and the product yield is 93%.
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