Electrochemistry (Chemistry)
All about electrochemistry 
I really like chem1's ebooks. They have a thorough description of electrochemistry, going through the galvanic cell, electrodes, the nernst equation and much more. They also have some excellent pictures as wel as some historical experiments. I would highly recommend you read through this...
Notes on the math of electrochemistry 
This handout gives just the bare necessities of electrochemistry including how to balance redox reactions.
Electrochemical Cells 
Hyperphysics has some really well written paragraphs on electrochemical cells. It's maybe a little more dense but will be good for a review. An extremely important class of oxidation and reduction reactions are used to provide useful electrical energy in batteries. A simple...
Experiments in Electrochemistry 
These are some elementary experiments that you can do at home to explore electrochemistry. The explanations about why the experiment works are pretty well written. One example of an experiment is The Volta Pile In his famous experiment in the year 1800, Alessandro Volta used a solution...
