3D graphene coated CoCO3 quantum dot compound electrode material synthesized with one-step solvothermal method and method
A graphene-wrapped, cobalt carbonate quantum technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve problems affecting electrochemical cycle stability, poor stability, etc., to facilitate rapid transmission , short reaction cycle, small size effect
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Embodiment 1
[0042] 1) Add 6mL of deionized water to 64mL of absolute ethanol to make 70mL of mixed solvent A;
[0043] 2) Add 1 mL of oleic acid into the mixed solvent A, stir for 3 minutes to obtain solution B;
[0044] 3) Take 2mmol of Co(NO 3 ) 2 ·6H 2 O, 10mmol of CO(NH 2 ) 2 , according to the molar ratio of 1:5 were sequentially added to solution B, stirred for 10min to obtain solution C;
[0045] 4) 0.07g of graphene oxide was added to solution C, and magnetically stirred for 20min to obtain suspension D;
[0046] 5) ultrasonically treat the suspension D for 6 h;
[0047] 6) Pour the ultrasonic suspension D into a 100mL polytetrafluoroethylene lining and then put it into a stainless steel reactor lining, seal it and place it in a homogeneous reactor, heat it from room temperature to 120°C, keep it warm for 5h, and then Cool naturally to room temperature to obtain precipitate E;
[0048] 7) Centrifuge the precipitate E and wash it with absolute ethanol for 3 times, then put ...
Embodiment 2
[0053] 1) Add 5mL of deionized water to 65mL of absolute ethanol to make 70mL of mixed solvent A;
[0054] 2) Add 0.5mL oleic acid into mixed solvent A, stir for 3min to obtain solution B;
[0055] 3) Take 3mmol of Co(NO 3 ) 2 ·6H 2 O, 15mmol of CO(NH 2 ) 2 , according to the molar ratio of 1:5 were sequentially added to solution B, stirred for 10min to obtain solution C;
[0056] 4) 0.1 g of graphene oxide was added to solution C, and magnetically stirred for 30 min to obtain suspension D;
[0057] 5) ultrasonically treat the suspension D for 8 hours;
[0058] 6) Pour the ultrasonic suspension D into a 100mL polytetrafluoroethylene lining and then put it into a stainless steel reactor lining, seal it and place it in a homogeneous reactor, heat it from room temperature to 140°C, keep it warm for 6h, and then Cool naturally to room temperature to obtain precipitate E;
[0059] 7) Centrifuge the precipitate E and wash it with absolute ethanol for 4 times, then put it int...
Embodiment 3
[0061] 1) Add 4 mL of deionized water to 66 mL of absolute ethanol to make 70 mL of mixed solvent A;
[0062] 2) Add 1.5mL oleic acid into mixed solvent A, stir for 4min to obtain solution B;
[0063] 3) Take 4mmol of Co(NO 3 ) 2 ·6H 2 O, 20mmol of CO(NH 2 ) 2 , according to the molar ratio of 1:5 was added to solution B in turn, stirred for 20min to obtain solution C;
[0064] 4) 0.12g of graphene oxide was added to solution C, and magnetically stirred for 40min to obtain suspension D;
[0065] 5) ultrasonically treat the suspension D for 10 h;
[0066] 6) Pour the ultrasonic suspension D into a 100mL polytetrafluoroethylene lining and then put it into a stainless steel reactor lining, seal it and place it in a homogeneous reactor, heat it from room temperature to 160°C, keep it warm for 8h, and then Cool naturally to room temperature to obtain precipitate E;
[0067] 7) Centrifuge the precipitate E and wash it with absolute ethanol for 5 times, then put it into a vac...
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