Abstract
As the global green hydrogen industry accelerates, PEM (Proton Exchange Membrane) water electrolysis has become the core technology due to its adaptability to renewable energy fluctuations, high hydrogen purity, and flexible start-stop capabilities. China is reshaping the global competitive landscape with its full industrial chain breakthroughs, technological parameters on par with international advanced levels, and dual advantages in cost and delivery efficiency. This article compares domestic and foreign technologies from five core dimensions, analyzing China’s global competitiveness in PEM water electrolysis for international market cooperation and technology implementation.
1. Technical Parameters: On Par with International Advanced Levels, Leading in Some Indicators
The core competitiveness of PEM water electrolysis lies in four key indicators: current density, energy consumption, response speed, and single-cell hydrogen production capacity. China’s leading enterprises have achieved parity with international giants and lead in some scenarios.
Indicator | China’s Leading Manufacturers (2025) | International Advanced Manufacturers (2025) | Difference Analysis |
Rated Current Density | 2.5–3.0 A/cm² | 2.0–3.5 A/cm² | China reaches international first-tier level; 500 Nm³/h single-stack products hit 3.0 A/cm², close to Europe’s highest level. |
DC Power Consumption | 4.19–4.35 kWh/Nm³ | 4.0–4.3 kWh/Nm³ | China’s energy consumption is on par with international standards; some products meet international first-class energy efficiency. |
Load Regulation Range | 0–130% | 0–150% | China’s ability to adapt to wind-solar fluctuations is close to international levels, meeting over 90% of renewable energy scenarios. |
Single-Cell Hydrogen Production | 500–1000 Nm³/h | 600–1000 Nm³/h | China’s 1000 Nm³/h offshore floating PEM system is a global first, leading in high-power scenarios. |
2. Key Materials: Accelerated Localization, Breaking Core Bottlenecks
China is accelerating the localization of proton exchange membranes, precious metal catalysts, and bipolar plates—the highest-cost components of PEM electrolyzers—breaking foreign technological monopolies.
• Proton Exchange Membrane: Domestic enterprises mass-produce composite membranes (45% localization rate). Domestic membranes cost less than imports, with delivery cycles significantly shortened compared to imports.
• Precious Metal Catalysts: Domestic enterprises achieved low-loading breakthroughs (iridium loading reduced to 0.3–1.0 mg/cm²), cutting costs significantly and with processing fees much lower than imports.
• Bipolar Plates: Ultra-thin titanium-based composite bipolar plates (thickness <1.2 mm) reduce equipment volume by 30% and costs by 20%, with a corrosion-resistant service life exceeding 80,000 hours.
3. Scenario Adaptation: Chinese Technology Better Fits Global Needs
Chinese PEM water electrolysis shows unique advantages in three core scenarios, better addressing international market pain points:
• Wind-Solar Hydrogen Production: Optimized for wind-solar fluctuations (0–130% load regulation, <5-second response), suitable for off-grid hydrogen production in Europe and Australia.
• High-Pressure Hydrogen Production: Mastered 35MPa compressor-free direct hydrogen production technology, reducing hydrogen station construction costs significantly, on par with international advanced technologies.
• Extreme & Offshore Scenarios: China’s 1000 Nm³/h offshore floating PEM system (global first) adapts to deep-sea wind power; domestic equipment operates stably at -40℃ to 60℃, cheaper than international counterparts.
4. Cost & Delivery: Global Cost-Effectiveness Advantage
China’s PEM electrolyzer system cost has dropped significantly in recent years, with obvious advantages compared to international products. Key cost advantages include:
• 80% localization rate of core components, cutting material costs by 40%;
• Large-scale annual production capacity of leading enterprises, reducing unit costs significantly and delivery cycles shortened compared to international manufacturers;
• Hydrogen production cost is lower than international manufacturers under the same electricity price conditions.
5. Commercialization & Export: Accelerating Global Layout
Chinese PEM water electrolysis has obtained EU CE, IECEx explosion-proof, and AS 3000 certifications, with overseas projects in South Africa, Europe, and Australia. China accounts for 60% of global PEM electrolyzer production capacity, with exports growing significantly year-on-year in 2025.
6. Conclusion
China’s PEM water electrolysis technology is on par with international advanced levels and leads in some indicators, with global competitiveness in localization rate, cost, delivery efficiency, and scenario adaptation. As material localization accelerates and technology iterates, China will further expand its global market share, supporting the global energy transition and carbon neutrality goals.
