Please enable JavaScript.

Coggle requires JavaScript to display documents.

Cells (Electrochemical cell (electrolyte is liquid (has ions, react with…

- - - - produce clean water and energy
      - Use in vehicles
        
        conventional fuel polluting and finite
        
        use electrical energy
        
        batteries
        
        no pollutants
        
        polluting to dispose as battery
        with highly toxic metal compounds
        
        rechargable but limit before needing replacing
        
        more expensive to make than fuel cell
        
        store less energy so need recharging
        more often which can take long time
        
        H-O fuel cell
        
        involve Redox reaction
        
        electrolyte usually KOH & electrodes
        porous C with a catalyst
        
        in fuel cell anode is -ve, cathode +ve
        
        H2 goes to anode compartment,
        O2 to cathode compartment
        
        OILRIG, at -ve electode, H oxidised,
        
        H+ moves towards cathode(+ve)
        
        at +ve O2 gains electrons and
        react with H+ to form water (reduction)
        
        electrons flow through external circuit from
        anode to cathode, this is the electric current