Preparation method of graphite sheet surface chemical plating iron-nickel alloy layer

[0028] 1 Pretreatment process of graphite flakes

[0029] 1.1 Oil removal process Take 1g of graphite flakes with a diameter of 80-100um and a thickness of 5-20um, put them into 100ml of NaOH aqueous solution with a mass fraction of 100g / L, and fully stir in a constant temperature magnetic stirrer to disperse (temperature is 45°C, the time is 2h, the stirring speed is 300r / min). After stirring, wash with deionized water for 3 to 5 times to neutrality, filter, and finally put it into a drying oven at 80° C. for 4 hours to dry for later use.

[0030] 1.2 Oxidation process Prepare 100ml of H2SO4 solution with a volume fraction of 250ml / L, add 10g of K 2 Cr 2 o 7 , stirred at room temperature (25°C) for 10 min to dissolve completely. Add the graphite flakes obtained in step 1.1 into the prepared solution, and fully stir in a constant temperature magnetic stirrer to disperse (temperature is 60°C, time is 10min, stirring speed is 300r / min). After stirring, wash with deioni

[0037] 1 Pretreatment process of graphite flakes

[0038] 1.1 Degreasing process Take 1g of graphite flakes with a diameter of 80-100um and a thickness of 5-20um, put them into 100ml of NaOH aqueous solution with a mass fraction of 80g / L, and fully stir in a constant temperature magnetic stirrer to disperse (temperature is 40°C, the time is 3h, the stirring speed is 300r / min). After stirring, wash with deionized water for 3 to 5 times to neutrality, filter, and finally put it into a drying oven at 80° C. for 4 hours to dry for later use.

[0039] 1.2 Oxidation process Prepare 100ml of H2SO4 solution with a volume fraction of 200ml / L, add 15g of K 2 Cr 2 o 7 , stirred at room temperature (25°C) for 10 min to dissolve completely. Add the graphite flakes obtained in step 1.1 into the prepared solution, and fully stir in a constant temperature magnetic stirrer to disperse (temperature is 50°C, time is 15min, stirring speed is 300r / min). After stirring, wash with deionize