Anion-selective materials with 1,4-diazabicyclo[2.2.2]octane functional groups for advanced alkaline water electrolysis

Green hydrogen from anion exchange membrane water electrolysis: a review of recent developments in critical materials and operating conditions

“…[99][100][101]113,123,126,144 Generally, electrolysis performance improves with increasing concentration of the hydroxide solution. 121,139,145,146 This improvement is explained by the decrease in the polarization resistance of the both electrodes and cell resistance at the same time. 146 While the polarisation resistance decreases linearly with increasing electrolyte concentration, 146 the cell resistance decreases at higher concentrations of the electrolyte less progressively than at the lower ones.…”

“…-form (18 mS cm À1 ). These differences in conductivity are also reected in the load curves of alkaline water electrolysis, recorded at 70 C. At an applied voltage of 1.75 V (85% efficiency) a current density of 266 mA cm À2 was achieved for the membrane in the OH À -form ( 97 This material was used as membrane and catalyst binder. Stability tests conducted at 30, 50 and 60 C in 10 mass% KOH for one week showed no change in conductivity and IEC at 30 C and a slight decrease by ca.…”

Alkaline Water Electrolysis Powered by Renewable Energy: A Review

“…Later, this concept was replaced by the zero-gap assembly, where the electrodes are directly pressed onto the separator to minimize ohmic losses due to the electrolyte. Porous materials like Zirfon ™ Perl UTP 500 (AGFA) or dense anion exchange membranes can be used as the separator [33][34][35][36][37]. Figure 3.…”

Ion-solvating membranes as a new approach towards high rate alkaline electrolyzers

“…The temperature range of the underlying datasets is from 22 to 80 1C. References used; without supporting electrolyte and PGM free (purple), 12,[39][40][41][42][43][44] without supporting electrolyte and with PGM (blue), 10,11,13,14,[45][46][47] with supporting electrolyte and PGM free (red), 12,19,28,44,[48][49][50][51][52][53] and with supporting electrolyte and with PGM (yellow). 10,11,13,14,28,54 Further details on specific datasets are available in the ESI.…”