Preparation method of zinc oxide nanometer fiber cathode material for lithium ion battery
A zinc oxide nanometer, lithium-ion battery technology, applied in the fields of polymer materials and chemical power sources, can solve the problems of poor cycle stability, rapid charge and discharge ability, low first cycle efficiency, etc., and achieves simple and easy-to-control preparation process, high initial Effects of discharge capacity and cycle stability, low production cost
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Embodiment 1
[0018] Weigh PAN 1.4g, PVP 0.6g (PAN / PVP=7:3), (CH 3 COO) 2 Zn 1.0g, then added to 23ml of DMF solution, stirred with a glass rod for about 20min until completely uniform swelling. Then the mixed solution was transferred to a 50ml Erlenmeyer flask, put into a magnetic rotor, adjusted to an appropriate rotational speed, and stirred at room temperature for 24 hours. The above-mentioned spinning solution prepared is put into self-made spinning equipment, under the process conditions of spinning voltage 10kV, collecting distance 8cm, solution extrusion speed 0.3ml / h, spinning for 10 hours, then drying in a vacuum oven for 2 hour, get PAN / PVP / (CH 3 COO) 2 Zn composite nanofibrous membrane. The above PAN / PVP / (CH 3 COO) 2 The Zn composite nanofiber membrane was transferred to a high-temperature tube furnace, heated from room temperature to 600 °C in an air atmosphere at a heating rate of 0.5 °C / min, and naturally cooled to room temperature after calcination.
Embodiment 2
[0020] Weigh PAN 1.4g, PVP 0.6g (PAN / PVP=7:3), (CH 3 COO) 2 Zn 1.0g, then added to 23ml of DMF solution, stirred with a glass rod for about 20min until completely uniform swelling. Then the mixed solution was transferred to a 50ml Erlenmeyer flask, put into a magnetic rotor, adjusted to an appropriate rotational speed, and stirred at room temperature for 24 hours. The above-mentioned spinning solution prepared is put into self-made spinning equipment, under the process conditions of spinning voltage 10kV, collecting distance 12cm, solution extrusion speed 0.5ml / h, spinning for 10 hours, then drying in a vacuum oven for 2 hour, get PAN / PVP / (CH 3 COO) 2 Zn composite nanofibrous membrane. The above PAN / PVP / (CH 3 COO) 2 The Zn composite nanofiber membrane was transferred to a high-temperature tube furnace, heated from room temperature to 600 °C in an air atmosphere at a heating rate of 1.5 °C / min, and naturally cooled to room temperature after calcination.
Embodiment 3
[0022] Weigh PAN 1.4g, PVP 0.6g (PAN / PVP=7:3), (CH 3 COO) 2 Zn 1.0g, then added to 23ml of DMF solution, stirred with a glass rod for about 20min until completely uniform swelling. Then the mixed solution was transferred to a 50ml Erlenmeyer flask, put into a magnetic rotor, adjusted to an appropriate rotational speed, and stirred at room temperature for 24 hours. The above-mentioned spinning solution prepared is put into self-made spinning equipment, under the process conditions of spinning voltage 12kV, collection distance 15cm, solution extrusion speed 1.0ml / h, spinning for 10 hours, then drying in a vacuum oven for 2 hour, get PAN / PVP / (CH 3 COO) 2 Zn composite nanofibrous membrane. The above PAN / PVP / (CH 3 COO) 2 The Zn composite nanofiber membrane was transferred to a high-temperature tube furnace, heated from room temperature to 700 °C in an air atmosphere, and the heating rate was 0.5 °C / min, and naturally cooled to room temperature after calcination.
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