A kind of high-efficiency liquid alkali metal alloy electrode and its preparation method and application
A technology of metal alloy and liquid alkali, which is applied in the direction of alkaline battery electrodes and alkaline batteries, can solve the problems of increasing the activity of sodium-potassium alloys, destroying the structure of carrier materials, and polysodium-potassium alloys, so as to improve the rate performance, The effect of improving Coulombic efficiency and increasing safety factor
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Embodiment 1
[0053] Soak a carbon cloth with a length and width of 5cm in 0.5M (0.5mol / L) NiCl 2 In the aqueous solution for 12h, take it out and dry it in a vacuum oven. Arrange the carbon in the center of the tube furnace, pass pure argon to remove the residual oxygen in the tube to ensure that the reaction is under an inert atmosphere, raise the temperature to 1200 ° C for 2 hours, cool down to room temperature 25 ° C, take out, and immerse the carbon cloth in 1M HCl and 1M FeCl 3 Soak in the mixed aqueous solution for 12 hours, wash off the Ni in the carbon cloth, wash with deionized water three times, and then dry to obtain a porous carbon cloth. Then, in an argon-filled glove box (both water and oxygen content are lower than 0.1ppm), the carbon cloth was used as the anode, and the potassium sheet of the same size was used as the cathode, soaked in 1M potassium hexafluorophosphate (KPF 6 ) Constant current 0.4mA cm in the electrolyte -1 Deposit for 10 hours, then take it out and so...
Embodiment 2
[0055] Soak mesoporous carbon (ordered mesoporous carbon CMK-3) material with a pore size of 7nm in 0.5M Zn(Ac) 2 solution, and then heated at 180° C. for 12 hours to obtain a ZnO-containing mesoporous carbon composite material. Mix the carbon composite material with conductive carbon black and PVDF (polyvinylidene fluoride) at a mass ratio of 8:1:1, add NMP (N-methylpyrrolidone) dropwise and stir to form a slurry, apply it on the copper sheet, and bake Dry to obtain pole pieces. The polar piece is used as the anode, and the same size potassium piece is used as the cathode, soaked in 1M KClO 4 Constant current 0.6mAcm in electrolyte -1 Deposit for 10 hours, then take it out and soak it in a solution composed of ethylene carbonate (EC) and dimethyl carbonate (DMC) with a volume ratio of 1:1 for 10 minutes, then take it out as an anode, and use a sodium sheet of the same size as a cathode, soak it in 1M NaClO 4 Constant current 0.6mA cm in the electrolyte -1 After 4 hours a...
Embodiment 3
[0057] Soak millet in 0.5M NiCl 2 and 0.5M Zn(Ac) 2 In the solution for 12h, take it out and dry it in a vacuum oven. Put the millet in the center of the tube furnace, pass pure argon to remove the residual oxygen in the tube to ensure that the reaction is under an inert atmosphere, raise the temperature to 1200°C for 2 hours, cool down to room temperature at 25°C, take it out, and then place it in an oxygen environment for 200°C ℃ for 2 hours to obtain pore-forming millet biochar materials doped with NiO and ZnO. Mix the bio-carbon composite material with conductive carbon black and PVDF (polyvinylidene fluoride) at a mass ratio of 8:1:1, add NMP dropwise and stir to form a slurry, coat it on a copper sheet, and dry it to obtain a pole piece. The pole piece is used as the positive electrode, the potassium piece is used as the negative electrode, and the electrolyte is 1M KPF 6 , assembled into a button cell, constant current 0.6mA cm -1 Take it out after 10 hours of depos...
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