Electrochemical preparation method of selenium-carbon microspheres and aluminum-selenium battery
An electrochemical and microsphere technology, applied in the electrochemical field, can solve the problems of uneven mixing, selenium dissolution, cumbersome process, etc., and achieve the effect of good uniformity and low price
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Embodiment 1
[0027] The selenium dioxide powder was pressed into a columnar block of φ10mm×5mm on a powder forming tablet press. The selenium dioxide columnar block is used as the cathode, the graphite plate is used as the anode, and the mixed salt of aluminum chloride and sodium chloride with a molar ratio of 1:1 is used as the electrolyte. Under the protection of argon, the temperature was raised to 190°C, and the electrolysis was performed at a constant voltage of 0.8V for 120min. After cooling to room temperature, the cathode product was taken out, ultrasonically treated for 10 min, and washed repeatedly with dilute hydrochloric acid and deionized water for 5 times. The electrolytic product is a selenium-carbon compound, which is in the shape of a block. The electron microscope photo is as follows: figure 1 shown. Among them, the mass of selenium accounts for 97.3%, and the carbon accounts for 2.7%.
Embodiment 2
[0029] The selenium dioxide powder was pressed into a columnar block of φ10mm×5mm on a powder forming tablet press. The selenium dioxide columnar block is used as the cathode, the graphite plate is used as the anode, and the mixed salt of aluminum chloride and sodium chloride with a molar ratio of 1:1 is used as the electrolyte. Under the protection of argon, the temperature was raised to 190°C, and the electrolysis was performed at a constant voltage of 1.0V for 120min. After cooling to room temperature, the cathode product was taken out, ultrasonically treated for 10 min, and washed repeatedly with dilute hydrochloric acid and deionized water for 5 times. The electrolytic product is a selenium-carbon complex, and part of it is in the shape of microspheres. The electron microscope photos are as follows: figure 2 shown. Among them, the mass of selenium accounts for 95.5%, and the carbon accounts for 4.5%.
Embodiment 3
[0031] The selenium dioxide powder was pressed into a columnar block of φ10mm×5mm on a powder forming tablet press. The selenium dioxide columnar block is used as the cathode, the graphite plate is used as the anode, and the mixed salt of aluminum chloride and sodium chloride with a molar ratio of 1:1 is used as the electrolyte. Under the protection of argon, the temperature was raised to 190°C, and the electrolysis was performed at a constant voltage of 1.2V for 120min. After cooling to room temperature, the cathode product was taken out, ultrasonically treated for 10 min, and washed repeatedly with dilute hydrochloric acid and deionized water for 5 times. The electrolytic product is a selenium-carbon complex, which is completely in the shape of a microsphere with a diameter of about 100 μm. The electron microscope photo is as follows: figure 1 shown. X-ray diffraction pattern as Figure 4 As shown, it is consistent with the hexagonal selenium lattice. Among them, the mas...
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