Preparation method of porous hard carbon/red phosphorus composite material
A composite material and hard carbon technology, applied in the preparation/purification of carbon, phosphorus compounds, chemical instruments and methods, etc., can solve the problems of low sodium storage capacity, difficult operation, high cost, etc., and achieve wide source of raw materials and low price , the effect of reducing production costs
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Embodiment 1
[0034] Step 1): Add 2 g of white birch sawdust and 2 g of potassium hydroxide into 80 mL of deionized water, stir at a water bath temperature of 80° C. for more than 1 hour, and then evaporate the water to dryness at this temperature to obtain white birch sawdust pretreated with KOH.
[0035] Step 2) Calcining the pretreated sawdust tube furnace from room temperature to 600°C for 0.5h at a rate of 5°C / min or more under an argon atmosphere, then soaking it in 1mol / L hydrochloric acid for 12h , to remove impurities, rinse with deionized water and dry in an oven to obtain a porous hard carbon material.
[0036] Step 3), mix and grind the above porous hard carbon and red phosphorus at a mass ratio of 1:1 for not less than 10 minutes to make them evenly mixed, then place the mixture in a glass tube, and then vacuumize the glass tube and seal it.
[0037] Step 4), put the glass tube containing the mixture in a muffle furnace, heat up from room temperature to 600°C at a heating rate ...
Embodiment 2
[0040] Step 1): Add 2 g of white birch sawdust and 2 g of potassium hydroxide into 80 mL of deionized water, stir at a water bath temperature of 80° C. for more than 1 hour, and then evaporate the water to dryness at this temperature to obtain white birch sawdust pretreated with KOH.
[0041] Step 2) Calcining the pretreated sawdust tube furnace from room temperature to 800°C for 0.5h at a rate of 5°C / min or more under an argon atmosphere, then soaking it in 1mol / L hydrochloric acid for 12h , to remove impurities, rinse with deionized water and dry in an oven to obtain a porous hard carbon material.
[0042] Step 3), mix and grind the above porous hard carbon and red phosphorus at a mass ratio of 1:1 for not less than 10 minutes to make them evenly mixed, then place the mixture in a glass tube, and then vacuumize the glass tube and seal it.
[0043] Step 4), put the glass tube containing the mixture in a muffle furnace, heat up from room temperature to 1000°C for 3 hours at a ...
Embodiment 3
[0048] Step 1): Add 2 g of white birch sawdust and 2 g of potassium hydroxide into 80 mL of deionized water, stir at a water bath temperature of 80° C. for more than 1 hour, and then evaporate the water to dryness at this temperature to obtain white birch sawdust pretreated with KOH.
[0049] Step 2) Calcining the pretreated white birch sawdust in a tubular furnace from room temperature to 1000°C for 0.5h at a rate of 5°C / min or more under an argon atmosphere, then soaking in 1mol / L hydrochloric acid 12h to remove impurities, rinse with deionized water and dry in an oven to obtain a porous hard carbon material.
[0050] Step 3), mix and grind the above porous hard carbon and red phosphorus at a mass ratio of 1:1 for not less than 10 minutes to make them evenly mixed, then place the mixture in a glass tube, and then vacuumize the glass tube and seal it.
[0051] Step 4), put the glass tube containing the mixture in a muffle furnace, heat up from room temperature to 600°C at a h...
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