Preparation method of alkaline battery negative electrode material
A negative electrode material and alkaline battery technology, applied in battery electrodes, circuits, electrical components, etc., can solve the problems of low specific surface area, large particle size, wide particle size distribution, etc., and achieve high specific surface area, low cost and rapid response Effect
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Embodiment 1
[0037] Place the reactor in an environment of 4°C, under the stirring condition of a magnetic stirrer, add 0.1mol / L, 100mL of CoCl 2 The solution was added to the reactor. Then, at a rate of 1 mL / min, add excess NaBH with NaOH to adjust the pH value to 12 dropwise. 4Solution (0.5mol / L, 100mL), continued to stir for 0.5h after the dropwise addition to ensure complete reaction, and precipitate 1 was obtained. The obtained precipitate 1 was washed three times with deionized water and then suction-filtered to obtain precipitate 2. Put the precipitate 2 into a cold trap, drop to -90°C together with the cold trap, and freeze at -90°C for 3 hours at a cooling rate of 15°C / min. After freezing, vacuumize to sublimate the liquid in the sediment 2 to realize the drying process. Under the conditions of vacuum degree ≤ 10.0Pa (the vacuum degree can be maintained at ≤ 10.0Pa under the technical conditions of this experiment, the vacuum degree is constantly changing in the actual experime...
Embodiment 2
[0040] Place the reactor in an environment of 4°C, under the stirring condition of a magnetic stirrer, add 0.1mol / L, 100mL of CoCl 2 The solution was added to the reactor. Then, at a rate of 5 mL / min, add excess NaBH with NaOH to adjust the pH value to 12 dropwise. 4 solution (0.1mol / L, 100mL), continue to stir for 0.5h after the dropwise addition to ensure the completion of the reaction, drive away the hydrogen bubbles, and obtain precipitate 1. The obtained precipitate 1 was washed three times with deionized water and then suction-filtered to obtain precipitate 2. Put the precipitate 2 into a cold trap, drop to -90°C together with the cold trap, and freeze at -90°C for 3 hours at a cooling rate of 15°C / min. After freezing, vacuumize to sublimate the liquid in the sediment 2 to realize the drying process. Under the conditions of vacuum degree ≤ 10.0Pa (the vacuum degree can be kept at ≤ 10.0Pa under the technical conditions of this experiment, the vacuum degree is constant...
Embodiment 3
[0043] Place the reactor in an environment of -8°C, under the stirring condition of a magnetic stirrer, add 0.1mol / L, 100mL of CoCl 2 The solution was added to the reactor. Then, at a rate of 5 mL / min, add excess NaBH with ammonia water to adjust the pH value to 12 dropwise. 4 solution (0.5mol / L, 100mL), continue to stir for 0.5h after the dropwise addition to ensure the completion of the reaction, drive away the hydrogen bubbles, and obtain precipitate 1. The obtained precipitate 1 was washed three times with absolute ethanol and once with deionized water, and then suction-filtered to obtain precipitate 2, which was placed in a refrigerator at -4°C for 1 hour. The temperature of the cold trap was lowered to -90°C, and the precipitate 2 placed in the -4°C refrigerator for 1 hour was put into the cold trap, and frozen at -90°C for 6 hours. After freezing, vacuumize to sublimate the liquid in the sediment 2 to realize the drying process. Under the conditions of vacuum degree ...
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