I've always thought this would be a good idea, being able to generate electricity from sugars in the blood I was hoping someone would come up with an implementa

I've always thought this would be a good idea, being able to generate electricity from sugars in the blood I was hoping someone would come up with an implementation. Another thought I had was the reverse, sort of. Mitochondria generate proton difference to convert ADP to ATP which is used to power a cell, it would be interesting if there were away to do this with electricity, something along the lines of chloroplasts used to make sugar.