I don't think anyone here will write a long paper like that for you but here is a complete description of fuel cells. Here is the information you need to write your paper.
https://en.wikipedia.org/wiki/Fuel_cell
1.A description of fuel cells of redox reactions, including a description of the product or procedure that the redox reaction is used in, and what are the products and reactants of the redox reactions.
2.The benefits of using electrochemical processes and redox reactions in fuel cells.
3. Any barriers to the use or negative impacts of fuel cells of redox reactions.
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