Lithium peroxide electrode and preparation method and application thereof
A technology of lithium peroxide and lithium hydroxide, applied to battery electrodes, fuel cell half-cells, secondary battery-type half-cells, circuits, etc., to avoid sudden failure, improve electronic conductivity, and improve cycle life Effect
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Embodiment 1
[0048] Take 10g of nickel carbonyl powder as conductive agent, 0.1g of sodium carboxymethylcellulose (CMC) as binder, and 0.5g of polyvinyl butyral as pore-forming agent and put them into a ball mill jar together, add 10g of deionized water, and Ball mill at a speed of 500 rpm for 60 minutes to obtain a slurry, which is coated on a 0.05 mm thick nickel-plated punched steel strip with a thickness of 0.4 mm on one side, and dried at 100°C for 6 hours to obtain Prefabricated substrates. Put the prefabricated substrate into a tube furnace, use high-purity nitrogen as the protective gas (linear flow rate 5cm / min), heat up to 1000ºC at a rate of 5ºC / min, sinter at a constant temperature of 1000ºC for 5min, cool naturally to room temperature, and cut off the protective gas. obtained substrate.
Embodiment 2
[0050] Take 10g of nickel carbonyl powder as conductive agent, 0.1g of sodium carboxymethylcellulose (CMC) as binder, and 0.5g of polyvinyl butyral as pore-forming agent and put them into a ball mill jar together, add 10g of deionized water, and Ball milling at a speed of 500 rpm for 60 min to obtain a slurry. The slurry was coated on a 0.02 mm thick punched nickel strip with a coating thickness of 0.08 mm on one side, and dried at 100°C for 6 hours to obtain a prefabricated substrate. Put the prefabricated substrate into a tube furnace, use high-purity ammonia as the protective gas (linear flow rate 5cm / min), heat up to 800ºC at a rate of 5ºC / min, keep the temperature at 800ºC for 30min, cool naturally to room temperature, and cut off the protective gas to obtain the substrate.
Embodiment 3
[0052] All operations were performed in a nitrogen-protected glove box. Take the substrate in Example 1, vacuum immerse the above substrate in a 16% (mass ratio) lithium hydroxide aqueous solution at 100°C for 10min (vacuum degree not greater than 20mm Hg); take it out and dry the surface water with hot air (80°C) trace. Vacuum-immerse the substrate impregnated with lithium hydroxide above in 35% (mass ratio) hydrogen peroxide aqueous solution at 50°C for 10 minutes (vacuum degree not greater than 20 mm Hg); take it out and dry the surface with hot air (80°C). Lithium hydroxide impregnated in the pores of sintered nickel reacts with hydrogen peroxide to generate hydrated lithium peroxide and deposits in the pores of sintered nickel. Repeat the step of impregnating lithium hydroxide and the step of impregnating hydrogen peroxide until the loading amount of active material in the above substrate reaches the requirement (theoretical specific capacity reaches 100mAh / cm 2 about)....
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