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The cell voltage in electrowinning processes is a sum of thermodynamic equilibrium potentials of decomposition of water and metal deposition, electrode overpotential of oxygen, hydrogen evolution and ohmic potential drops.Only some of the components of cell voltage can be reduced.Thermodynamic potentials always remain the same.The ohmic potential drops due to the conductivity of electrolyte and of hardware cannot be significantly reduced.Significant improvement is possible only by reducing the anode overpotential.