Electrochemistry : battery

[Externet]

Hi everyone.

From what I remember, the highest electronegativity differential between two metals, the larger the voltage obtainable in a battery when those metals are used as its anode and cathode. Did I remember well?

 

Using easy to get and cheap materials; as aluminium, copper, iron, carbon, lead, zinc... which two would yield the highest potential ¿lead and copper?

Am trying to build a simple seawater cell to activate an ultrasonic beacon at expense of the electrodes.

 

An electronic circuit transforms the cell output to a higher voltage for circuit operation. Current capability is proportional to electrodes area.

Thanks,

Miguel

[YT2095]

will it be seperate cells of sea water isolated or will it share the sea water as a common electrolyte?

[Externet]

Hi.

Battery was an improper term, it will be a single cell (two rods or plates) protuding from a PVC pipe housing the electronics, exposed to seawater flow, submerged at no less than 10 feet depth.

A photocell turns the unit off at nights.

What would be the reaction ? If C and Zn, Na+ and Cl-

 

Miguel

[H2SO4]

If i where you, id use copper and zinc. They have a pretty large difference in terms of reactivity, and are both cheap metals.

[ed84c]

Carbon is used in Batteries and on 'Rough Science'

[budullewraagh]

"From what I remember, the highest electronegativity differential between two metals, the larger the voltage obtainable in a battery when those metals are used as its anode and cathode. Did I remember well?"

electronegativity doesn't determine cell voltage potential difference. reduction and oxidation potentials do. there is correlation between electronegativity and oxidation and reduction potentials, but this does not work in multiple cases

[YT2095]

I find that Iron and Alu work well in either an acid or base media (as used on the non powered PH meters for plant pot soil).

 

they simply reverse polarity depending on the PH