A preparation method of multifunctional diaphragm coating for lithium-sulfur battery
A lithium-sulfur battery, a multi-functional technology, applied in the field of materials, can solve the problems such as the inability to effectively control lithium polysulfide, and achieve the effect of facilitating transmission, high performance, and low-cost preparation
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Embodiment 1
[0028] (1) Add 7.5 mmol nickel nitrate and 11.25 mmol sodium citrate to 500 ml of graphene oxide solution with a concentration of 1.5 mg / ml to form A solution, and add 5 mmol potassium hexacyanoferrate to form A solution. 500 ml of solution B. Slowly add solution B to solution A and react at 30°C for 24 hours;
[0029] (2) taking the mixed solution in step (1) into the reaction kettle, hydrothermally reacting at 130 ° C for 3 hours, washing and drying the screen to obtain the nickel-iron Prussian blue / graphene composite;
[0030] (3) Take the nickel-iron Prussian blue / graphene composite (100 mg) and selenium powder (700 mg) of step (2) and place them on the downstream and upstream of the porcelain boat, respectively, in a tube furnace under argon for 350 calcined at high temperature for 3 hours to obtain nickel-iron selenide / graphene composite;
[0031] (4) Mixing the nickel-iron selenide / graphene composite of step (3) and the polyvinylidene fluoride adhesive solution, sucti...
Embodiment 2
[0034] (1) Add 7.5 mmol of nickel nitrate and 11.25 mmol of sodium citrate to 500 ml of graphene oxide solution with a concentration of 2 mg / ml to form A solution, and 5 mmol of potassium hexacyanoferrate to form a solution. 500 ml of solution B. Slowly add solution B to solution A and react at 30°C for 24 hours;
[0035] (2) taking the mixed solution in step (1) into the reaction kettle, hydrothermally reacting at 150°C for 2 hours, washing and drying the sieve to obtain a nickel-iron Prussian blue / graphene composite;
[0036](3) Take the nickel-iron Prussian blue / graphene composite (100 mg) and selenium powder (700 mg) of step (2) and place them on the downstream and upstream of the porcelain boat, respectively, in a tube furnace under an argon atmosphere for 350 calcined at high temperature for 3 hours to obtain nickel-iron selenide / graphene composite;
[0037] (4) Mixing the nickel-iron selenide / graphene composite of step (3) and the polyvinylidene fluoride adhesive solu...
Embodiment 3
[0039] (1) Add 7.5 mmol of nickel nitrate and 11.25 mmol of sodium citrate to 500 ml of graphene oxide solution with a concentration of 2 mg / ml to form A solution, and 5 mmol of potassium hexacyanoferrate to form a solution. 500 ml of solution B. Slowly add solution B to solution A and add it at 30 o Reaction for 24 hours at C;
[0040] (2) taking the mixed solution in step (1) into the reaction kettle, hydrothermally reacting at 130 ° C for 3 hours, washing and drying the screen to obtain the nickel-iron Prussian blue / graphene composite;
[0041] (3) Take the nickel-iron Prussian blue / graphene composite (100 mg) and selenium powder (1000 mg) of step (2) and place them on the downstream and upstream of the porcelain boat, respectively, in a tube furnace under an argon atmosphere for 350 calcined at high temperature for 3 hours to obtain nickel-iron selenide / graphene composite;
[0042] (4) Mixing the nickel-iron selenide / graphene composite of step (3) and the polyvinylidene...
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