What is the maximum charge in Coulombs can be obtained in ionistor?

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Discussion Overview

The discussion revolves around the maximum charge in coulombs that can be obtained from ionistors, which participants relate to supercapacitors. The conversation includes inquiries about the relationship between capacitance and charge, as well as practical considerations regarding the use of supercapacitors.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • Some participants clarify that ionistors are essentially capacitors, specifically supercapacitors, and emphasize the need for charge in coulombs rather than capacitance in farads.
  • One participant presents the formula Q=CV to calculate charge, suggesting that multiplying capacitance by voltage yields the stored charge in coulombs.
  • There is a question about whether a calculation of 10,000F × 5V resulting in 50,000 coulombs is reasonable, with concerns raised about the magnitude of such a charge.
  • Another participant points out that 10,000 farads is an exceptionally large capacitance and questions the availability of such capacitors.
  • Participants reference a table from Wikipedia listing supercapacitors with capacitance values ranging from 100 to 12,000F and voltages from 2.2 to 3.3V, leading to further calculations of potential charge.
  • One participant cautions about the limitations of supercapacitors, particularly regarding the maximum charge and discharge current for practical applications.

Areas of Agreement / Disagreement

Participants express differing views on the feasibility of achieving high charge values with supercapacitors, with some questioning the practicality of the calculations presented. There is no consensus on the maximum charge that can be realistically obtained.

Contextual Notes

Participants note the importance of understanding the limitations of supercapacitors, including maximum charge and discharge rates, which may affect practical applications.

ivanovenkoi
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Hi
welcome to PF :smile:
ivanovenkoi said:
ionistors

what on Earth is that ?
the link you supplied goes to capacitors, and in particular, super capacitors

Capacitors have their Farad rating printed on them
 
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Ionistor is the same as capacitors. I mean capacitors exactly. I need the maximum available charge in Coulombs, not in Farads. Because Farad measures not charge but electrical capacitance.

P.S. Sorry for my poor English, I am not english speaker.

davenn said:
Hi
welcome to PF :smile:

what on Earth is that ?
the link you supplied goes to capacitors, and in particular, super capacitors

Capacitors have their Farad rating printed on them

Ionistors are capacitors in general. I need not Farad, because farad is electrical capacitance. I need charge in coulombs.
davenn said:
Hi
welcome to PF :smile:

what on Earth is that ?
the link you supplied goes to capacitors, and in particular, super capacitors

Capacitors have their Farad rating printed on them
 
ivanovenkoi said:
I need the maximum available charge in Coulombs, not in Farads.
Q=CV

So multiply the Capacitance in Farads by the Voltage in Volts, and you get the stored charge Q in Coulombs.
 
berkeman said:
Q=CV

So multiply the Capacitance in Farads by the Voltage in Volts, and you get the stored charge Q in Coulombs.
So can it be 10000F × 5V = 50000 Coulombs for ecample? Or it's too much? I need digit order. Because I read that 1 coulomb is a very big charge. So 50000 is extremely big, isn't it?
 
ivanovenkoi said:
So can it be 10000F × 5V = 50000 Coulombs for ecample? Or it's too much? I need digit order. Because I read that 1 coulomb is a very big charge. So 50000 is extremely big, isn't it?
10,000 Farads is a huge capacitor. Where are you finding something like that?
 
phyzguy said:
10,000 Farads is a huge capacitor. Where are you finding something like that?
https://en.m.wikipedia.org/wiki/SupercapacitorHere I see in the table below supercapacitors 100..12000F, 2.2..3.3V
So 12000F*3.3V is almoustly 40000 Coulombs, isn't it?
 
ivanovenkoi said:
Here I see in the table below supercapacitors 100..12000F, 2.2..3.3V
Be sure to read the limitations of supercaps. What is the application? You are not going to dump all of that charge all at once out of a supercap...
 
What berkeman said is right.
If it is for a practical application beware of the maximum charge and discharge current for the specific capacitor you buy.
 

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