Preparation method of growing needle-shaped network-structure nickel cobalt flexible electrode by taking carbon fiber as support body
A network structure, flexible electrode technology, applied in hybrid capacitor electrodes, hybrid/electric double-layer capacitor manufacturing, hybrid capacitor current collectors, etc. Achieve good cycle stability, simple operation, and improve the effect of electrochemical performance
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[0029] Example 1
[0030] Step 1: Add 0.8g of PAN to 10mL of DMF, magnetically stir at 60℃ for 14h, stir until the solution turns bright yellow
[0031] Step 2: Set the electrospinning voltage to 15kV, the receiver speed to 800r / min, and the injector advancing speed to 5mm / h for electrospinning to obtain a white film-like carbon fiber precursor.
[0032] Step 3: Pre-oxidize the obtained white film at 250° C. for 2 hours in an air atmosphere, and the film turns white to light brown; then carbonize at 800° C. under an argon atmosphere for 1 hour to obtain a nano carbon fiber flexible substrate.
[0033] Step 4: Prepare a mixed solution of nickel nitrate with a concentration of 0.07 mol / L, cobalt nitrate with a concentration of 0.14 mol / L and urea with a concentration of 0.21 mol / L, and stir thoroughly to dissolve.
[0034] Step 5: Immerse the prepared nano carbon fiber flexible substrate in the prepared solvent and hydrothermally heat it at 180° C. for 6 hours to obtain a flexible carbon ...
Example Embodiment
[0036] Example 2
[0037] Step 1: Add 0.9g of PAN to 10mL of DMF, magnetically stir at 80℃ for 12h, and stir until the solution is bright yellow
[0038] Step 2: Set the electrospinning voltage to 16kV, the receiver speed to 500r / min, and the injector advancing speed to 5mm / h for electrospinning to obtain a white film-like carbon fiber precursor.
[0039] Step 3: Pre-oxidize the obtained white film at 220° C. for 3 hours in an air atmosphere, and the film turns white to light brown; then, it is carbonized at 700° C. in an argon atmosphere for 1 hour to obtain a nano carbon fiber flexible substrate.
[0040] Step 4: Prepare a mixed solution of nickel chloride with a concentration of 0.08mol / L, cobalt chloride with a concentration of 0.16mol / L and urea with a concentration of 0.24mol / L, and stir well until dissolved
[0041] Step 5: Immerse the prepared nano carbon fiber flexible substrate in the prepared solvent and hydrothermally heat it at 160° C. for 8 hours to obtain a flexible carbo...
Example Embodiment
[0043] Example 3
[0044] Step 1: Add 1.0g of PAN to 10mL of DMF, magnetically stir at 60℃ for 24h, and stir until the solution is bright yellow
[0045] Step 2: Set the electrospinning voltage to 17kV, the speed of the receiver to 800r / min, and the injector advancing speed to 6mm / h to perform electrospinning to obtain a white film-like carbon fiber precursor.
[0046] Step 3: Pre-oxidize the obtained white film at 230° C. for 2 hours in an air atmosphere, and the film turns white to light brown; then, it is carbonized at 800° C. in an argon atmosphere for 1 hour to obtain a nano carbon fiber flexible substrate.
[0047] Step 4: Prepare a mixed solution of nickel sulfate with a concentration of 0.09 mol / L, cobalt sulfate with a concentration of 0.18 mol / L and urea with a concentration of 0.27 mol / L, and stir thoroughly until dissolved.
[0048] Step 5: Immerse the prepared nano carbon fiber flexible substrate in the prepared solvent, and hydrothermally heat it at 140° C. for 12 hours to...
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