Preparation method of azotized graphene lithium ion power battery slurry
A technology of graphene nitride and lithium-ion batteries, which is applied in the direction of battery electrodes, circuits, electrical components, etc., can solve the problems of graphene nitride quality reduction, high nitriding treatment temperature, unsuitable for industrial production, etc., to increase the amount of addition , Improve the high temperature cycle and improve the effect of safety
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[0036] Example 1
[0037] Step 1. Preparation of pre-nitrided expandable graphite: First, weigh 15 parts of graphite, 10 parts of concentrated sulfuric acid, 30 parts of potassium permanganate, and 5 parts of ammonium bicarbonate by weight and mix thoroughly, and stir and react at 80°C for 0.5- 2h, add 10 parts of ammonium bicarbonate after washing, mix well, carry out the second step of pre-nitridation at 120 ° C, and dry for 3 hours to obtain pre-nitrided expandable graphite;
[0038]Step 2, preparation of nitrided expanded graphite: the above-mentioned pre-nitrided expandable graphite is treated at a high temperature of 1000 ° C, and nitridation is simultaneously performed during the expansion process to obtain nitrided expanded graphite;
[0039] Step 3. Preparation of graphene nitride lithium-ion power battery slurry (the following parts are all taken by weight):
[0040] (1) Add 100 parts of N-methylpyrrolidone into the mixer feed tank, wherein the mixer feed tank is co...
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[0044] Example 2
[0045] Step 1. Preparation of pre-nitrided expandable graphite: First, weigh 10 parts by weight of graphite, 15 parts of concentrated sulfuric acid, 40 parts of potassium dichromate, and 5 parts of ammonium carbonate, mix them thoroughly, stir and react at 60°C for 2 hours, and wash Then add 15 parts of ammonium carbonate, mix evenly, carry out the second step of pre-nitridation at 120 ° C, and dry for 3 hours to obtain pre-nitrided expandable graphite;
[0046] Step 2, preparation of nitrided expanded graphite: the pre-nitrided expandable graphite is expanded by microwave, the microwave output power is 1500w, and the time is 2min, and nitridation treatment is simultaneously performed during the expansion process to obtain the nitrided expanded graphite;
[0047] Step 3. Preparation of graphene nitride lithium-ion power battery slurry (the following parts are all taken by weight):
[0048] (1) Add 100 parts of N-methylpyrrolidone into the mixer feed tank, w...
Example Embodiment
[0052] Example 3
[0053] Step 1. Preparation of pre-nitrided expandable graphite: First, weigh 20 parts of graphite, 15 parts of potassium permanganate, 20 parts of perchloric acid, and 5 parts of urea by weight and mix them thoroughly, stir and react at 60 ° C for 2 hours, and then wash Add 10 parts of urea, mix evenly, carry out the second step of pre-nitridation at 120 ° C and dry for 3 hours to obtain pre-nitrided expandable graphite;
[0054] Step 2: Preparation of Nitrided Expanded Graphite: The above-mentioned pre-nitrided expandable graphite is treated at a high temperature of 1000 ° C, that is, nitriding treatment is carried out at the same time during the expansion process, and then the nitrided expanded graphite is passed into a boiling furnace, and the temperature is 800 ° C. , nitrogen purging for post-nitriding treatment, and finally the nitrided expanded graphite is collected;
[0055] Step 3. Preparation of graphene nitride lithium-ion power battery slurry (t...
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