... low cell voltage, for 30-34% NaOH production, suitable for high current density cells. DF2801 membrane has better tolerance for impurities in ... Test Performance of Dongyue series Membranes* membrane Current density(kA/m2) Cell voltage (V) Current efficiency (%) kWh/tNaOHDF9883.5~3.2>95 ... 50 effective area, at 3.5 or 4.5kA/m2 current density, 32% NaOH, 205g/L NaCl concentration (outlet), 85-90 ...