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Alufoil-MnO2 Battery cell with 2.67 Volts ! WOW !

Started by hartiberlin, June 03, 2015, 10:41:02 AM

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SeaMonkey

#10
June 26, 2015, 01:10:27 AM
We must not forget that the Manganese Dioxide (MnO2)
is a Depolarizer that is chemically changed as the cell
produces electrical current.  Without this depolarizer
Hydrogen bubbles would collect on the surface of the
positive electrode thereby increasing the internal
resistance of the cell and diminishing its ability to
produce electrical output.

profitis

#11
June 27, 2015, 03:41:13 AM
In acid: Mno2 + 4H+ + 4e-> Mn2+ + 2h2o E= 1.23v

In alkali: Mno2 + 2h2o + 2e- > Mn(oh)2 + 2oh- E= 0.1v

in alkali, oxygen/air can reverse the above reaction because O2 + 2h20 + 4e-  > 4OH- E= 0.414v   higher than 0.1v
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