Preparation method and application of nitrogen-doped self-supporting nanofiber membrane
A technology of nanofiber membrane and composite nanofiber, which is applied in the direction of active material electrodes, structural parts, electrical components, etc., can solve the problems of small storage capacity and poor electrochemical performance of SIB negative electrode materials, so as to improve electrochemical performance and increase the rate Effects of performance, shortened insertion and extraction paths
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Embodiment 1
[0031] A method for preparing a nitrogen-doped self-supporting nanofiber membrane, comprising the steps of:
[0032] S1. Accurately weigh 8.7 g DMF and 1.3 g PAN, dissolve PAN into DMF and place it in an oil bath at 60 °C for 10 h at constant temperature, and prepare spinning solution after PAN is completely dissolved.
[0033] S2. Select a 20 ml syringe to absorb the spinning solution, and fix it on the injection flow rate controller, turn on the electrospinning equipment to adjust the relevant spinning parameters (spinning temperature 45 ℃, humidity 36%, 22 G needle, voltage 26 Kv, rotation speed 200r / min, flow rate 2 ul / min, the distance between the needle and the receiving plate is 21 cm), and the nanofiber membrane was prepared. The nanofiber membrane was placed in a blast drying oven at 60 °C for 6 h to remove the solvent, cut into square pieces of 5 × 9 cm, and the fiber membrane was laminated with a graphite sheet with a smooth surface.
[0034] S3. Place the fiber fi...
Embodiment 2
[0036] A method for preparing a nitrogen-doped self-supporting nanofiber membrane, comprising the steps of:
[0037] S1. Accurately weigh 8.2 g DMF and 1.8 g PAN, dissolve PAN into DMF and place it in an oil bath at 50 °C for 10 h at constant temperature, and prepare spinning solution after PAN is completely dissolved.
[0038] S2. Select a 20 ml syringe to absorb the spinning solution, and fix it on the injection flow rate controller, turn on the electrospinning equipment to adjust the relevant spinning parameters (spinning temperature 45 ℃, humidity 36%, 22 G needle, voltage 26 Kv, rotation speed 200r / min, flow rate 2 ul / min, the distance between the needle and the receiving plate is 21 cm), and the nanofiber membrane was prepared. The nanofiber membrane was placed in a blast drying oven at 60°C to remove the solvent for 6 h, and cut into square pieces of 5 × 9 cm, using such as figure 1The jig shown is under a load of 100 g for 2 h to thermally stretch the fiber membrane, ...
Embodiment 3
[0041] A method for preparing a nitrogen-doped self-supporting nanofiber membrane, comprising the steps of:
[0042] S1. Accurately weigh 10 g DMF and 1.6 g PAN, dissolve PAN into DMF and place it in an oil bath at 55 °C for 10 h at constant temperature, and prepare spinning solution after PAN is completely dissolved.
[0043] S2. Select a 20 ml syringe to absorb the spinning solution, and fix it on the injection flow rate controller, turn on the electrospinning equipment to adjust the relevant spinning parameters (spinning temperature 45 ℃, humidity 36%, 22 G needle, voltage 26 Kv, rotation speed 200r / min, flow rate 2 ul / min, the distance between the needle and the receiving plate is 21 cm), and the nanofiber membrane was prepared. The nanofibrous membrane was placed in a blast drying oven at 60°C for 10 h to remove the solvent, and cut into square pieces of 5 × 9 cm, using such as figure 1 The jig shown is hot stretching the fiber membrane under a load of 200g for 2h, and t...
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