The piece of usual lemon is new PROTONIC electrolyte
The piece of usual lemon is new electrolyte for discovered by us new pair of electrodes for cell
(+)C(graphite|graphene)|protonics|Sn(-)
Very interesting:
Electromotive forces (600 mV at 300 K)
is remarkably closed to one
for the cell (+)C|CsHSO4|Sn(-) at 400K.
Both electrolytes are acidic.