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GREEN HYDROGEN COST REDUCTION R&D: By now, alkaline and PEM have reached maturity with high efficiency, durability and low material use. Research is now driven by private funds rather than public support in the search for proprietary developments and a competitive advantage that delivers a higher market share. New AEM membranes could have been developed by now that combine the best of both worlds (alkaline and PEM), with no expensive titanium, no expensive membrane, high operating pressure, no electrolyte solution, or tight water requirements. AEM are taking an increasing market share of a burgeoning hydrogen sector. Similarly, solid oxide is now commercial, offering a more efficient option that can be integrated with hydrogenderived products. Applying these strategies would unlock the low-cost potential of electrolysers, achieving a 40% reduction in the short term and an 80% one in the long-term (see Figure 34). Figure 34. 100% 90% 80% 70% 60% 50% 40% 30% 20% 10% 0% Based on IRENA analysis. With the goal of achieving green hydrogen competitiveness in mind, the cost of the electrolyser is not the only factor (see Figure 35). Once the operating hours of the electrolyser reach the order of 3 000-4 000 hours per year, the main contributor to the production cost is the electricity price. The Potential cost reduction by implementing strategies presented in this report across three stages of deployment. Power Supply Bipolar Plates (BPs) Deionised Water Ciculation Hydrogen Processing Porous Transport Layer (PTLs) Diaphragm/Electrode Package Manufacturing Cooling Others PEM TODAY Alkaline Stage 1 Stage 2 Stage 3 FUTURE 90 strategies shown in this report will enable a higher efficiency, decreasing the cost contribution of the electricity input. In parallel, renewable electricity – already more competitive than fossil-based electricity in many jurisdictions – will continue scaling up and achieving lower costs.PDF Image | GREEN HYDROGEN SCALING UP ELECTROLYSERS
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