SilverFox
Flashaholic
Hello Rjspeers,
Welcome to CPF.
When measuring a cell the anode is the + end. Your assumption is correct.
Tom
Welcome to CPF.
When measuring a cell the anode is the + end. Your assumption is correct.
Tom
Hello Rjspeers,
Welcome to CPF.
When measuring a cell the anode is the + end. Your assumption is correct.
Tom
The way I was always taught for this is that the electrode that generates anions (+ ions) is the anode and the electrode that generates cations (- ions) is the cathode in an electrochemical cell.
The way I was always taught for this is that the electrode that generates anions (+ ions) is the anode and the electrode that generates cations (- ions) is the cathode in an electrochemical cell. The electrode designation obviously reverses depending on if you are charging or discharging a cell, but the polarity (+ and - terminal designations) of a cell does not change with charge or discharge, even though readings may go negative with cell over-discharge. The + and - terminal designations are reference points and are unvarying, the same fashion that a grounding point is designated as 0 Volts.
If you hook up a DC voltmeter with the red lead plugged into the meters positive socket and the black lead plugged into the negative socket then put the test leads across the terminals of a battery if the voltage reads positive am I to assume that the red lead is on the anode? I realize that current direction is the determining factor but would this not be reflected in the voltmeter reading?
After looking that up, I can't believe I had that backwards all these years. You are right about that and also you need to modify "the electrode that generates" to "the electrode that receives" in the post also.
Ginseng said:or rechargeables: It operates as a galvanic cell during discharge and as an electrolytic cell during charge. As a consequence, the anode is the negative electrode during discharge, while it is the positive electrode during charge; at the same time, the cathode is the positive electrode during discharge, while it is the negative electrode during charge. This can create a confusing situation, and it is preferable to refer to the electrodes of a rechargeable battery as "positive" and "negative," because this designation is independent of the operational mode. Unfortunately, this nomenclature is not always followed. Often the "negative" electrode is designated as anode and the "positive" electrode is designated as cathode. This naming convention is a carry-over from the convention of the non-rechargeable battery.
It's called electrical tape because it conducts electricity.
WOW! So slickly done and professional 'quality'. THEN he pops with that! comment.
Totally ruins his credibility.
Yeah, I loved that bit. All part of the fun. I'm sure some people are taken in by his videos. Genius!
Hi Sam. You should probably indicate somewhere in that post, that it's a spoof. There are enough folks who are new to rechargeable batteries that are confused enough already. It's not because they're unintelligent or anything, they just don't have any experience.
I agree that the vid is done very well (the music especially cracks me up), but I'm afraid it may steer someone in the wrong direction. We have newcomers wanting to charge eneloops in Li-Ion chargers, and vice versa. Compared to that, a misleading video about how to charge alkaline cells is nothing.
Just a thought.
Dave