Hello, this is my first post. I am interested in electrochemistry, having being into electronics a while, I have discovered that batteries are very interesting. I have been playing around with iron carbon, aluminium carbon, hydrgogen-oxygen and various dual carbon chemistries. The Iron has been the most successful so far, achieving 1.14V open for several weeks and still going. I got into electrochemistry after placing my multimeter terminals across my hands accidentally while having eczema cream on. I noticed a voltage present, I now know this is due to the slight imbalance of cream concentrations between my hand and the terminal were aluminium, so one of them as being oxidised at a greater rate than the other. When I measured the voltage, I realised, it is so simple to make a battery! I'm an enjoying it greatly, and want to go further.
I was trying different aqueous salts the other day, first trying sodium bicarbonate and then sodium citrate, produced by mixing the sodium bicarbonate with orange juice. The sodium citrate is now in a aluminium-carbon cell, producing a constant 0.95V open cell voltage for the past week, it was charged from a nine volt. I have access to a few elements and chemical compounds, iron, aluminium, (edit: and copper, carbon(graphite)), other relatively safe materials that I can buy online, along with what I can find in the kitchen, sodium bicarbonate, acetic acid solution, citric acid solution, sodium chloride and others. I can't use bleach for any chemical processes because my parents won't let me. I also have access to deodorants and moisturisers, which makes electrolytes easy to work with as they are pre gelled due to the inert parrafin based components.
What can I do now? I would like to look into more exotic electrolytes, aqueous salts are all I have used so far. I have read that alcohols and some oils can form electrolytes. Can anyone suggest something that fulfils these criteria:
Are not dangerous (NFPA 704 maximum health value of 2)
Are not flammable (so there is no risk of fire from overcharge)
Form electrolytes
I also have some questions about some metals for interesting electrodes, but that is another question.
I hope I have formatted my question correctly, Thanks