I wanted to make a symmetrical capacitor consisting of 2 Carbon/PPy films by mixing PVA and H2SO as a separator. However, I was unable to turn on the lamp. I took the attached work as an example. Where do you think I went wrong?
Ritu Garg I bought carbon as a ready material. I used this carbon for the substrate. And Polypyrrole films produce by electrodeposition technic. What is the change, when I use PVA and KOH? PVA and H2SO4 why isn't it? What is your idea?
Dear Dilek,
There may be several reasons why the LEDs are not lighting up. One of the possible reasons could be that the voltage of your device is not enough to light up the lamp. To solve this issue, you can connect two or more devices in a series and then check for the same. Also, check your electrode materials capacity in a three-electrode setup and whether they are capable enough to store that much charge? Also, ensure the current collectors are not getting short during the measurement.
You can refer to the publication below for detailed discussion
Article Solution processed nanostructured cerium oxide electrode: El...
Best regards,
Nitish
Nitish Kumar Thank you for your answer. And I want to ask the other questiıon. The following sentence is in your article. With the full utilization of nanostructured morphology, the device shows a maximum specific capacitance of 321.3 F/g as depicted in Fig. 9b. How did you calculate 321.3 F/g for this symmetrical capacitor? Such as this formula for one electrode C= integral (Idv)/m*V2-V1*v, one symmetrical device for two-electrode your mass *2. You use two series device. 1/C=1/C1+1/C2. But device-specific capacitance value with CV technic ? I hope I could explain. thank you again..
Dear Di̇lek Vatansever
The reported capacitance value is for a single device. Hence, there is no need for using formula for two series devices. We have calculated capacitance from CV technique using same formula, but the mass has been used as the total mass of both the electrodes. We have shown that the LED panel can be lit using two series devices, which will give 2.4V, sufficient for lighting up the LEDs.
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