One-step solvothermal synthesis of three-dimensional graphene-wrapped cobalt carbonate quantum dot composite electrode material and method
A graphene-wrapped, cobalt carbonate quantum technology, applied in battery electrodes, nanotechnology for materials and surface science, circuits, etc., can solve problems such as poor stability and affecting electrochemical cycle stability, and achieve short reaction cycles, Conducive to rapid transport, electron and ion transport promotion 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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