Fig. 7

The relationship between current efficiency, energy consumption, ratio of voltage to current, and area ratio of nodules with 2 × 2 cm2 plates for various current densities. (a) Current efficiency. (b) Energy consumption. (c) Ratio of voltage to current. (d) Area ratio of nodules. (e) Improved current efficiency and lower energy consumption. (f) Reduced ratio of voltage to current and the reduced area ratio of nodules.