As global hydrogen demand surges, the high cost and long lead times of traditional machining limit the scale-up of PEM fuel cells and water electrolyzers. Now, a multi-institution team led by Prof. Min Wang (China University of Petroleum), Prof. Gaoqiang Yang (Hunan University) and Prof. Feng-Yuan Zhang (University of Tennessee) has delivered a comprehensive roadmap on additive-manufacturing every key component—CL, GDL, PTL, BP—at <100 °C. The work shows how 3D printing can cut platinum use, eliminate assembly steps and push devices to 2 A cm -2 , offering a fast track to low-cost green-hydrogen systems.
Why 3D-Printed Hydrogen Components Matter
• Ultra-Low Precious-Metal Loading: Ink-jet and DIW patterning reduce Pt to 0.02 mg cm -2 while boosting utilization above 16 kW g -1 .
• Rapid Prototype-to-Test Cycle: CAD-to-cell in 24 h accelerates flow-field optimization without moulds or tooling.
• Monolithic Integration: All-in-one bipolar electrode (AIOBE) fuses CL/PTL/BP/gasket, slashing interfacial resistance 14×.
Innovative Design and Features
• Printing Portfolio: DIW, IJP, DLP, SLS, SLM and EBM are matched to CL (μm pores), GDL (graded porosity), PTL (ordered bubble highways) and BP (complex channels).
• Multi-Material & Multi-Scale: Core–shell nozzles co-print Ti-alloy frames with conductive polymer channels; 10 µm binder-jetting meets sub-millimeter electrolyzer tolerances.
• Low-Temperature Compatibility: <100 °C operation widens material choice to PLA, ABS, nickel and titanium alloys.
Applications and Future Outlook
• PEMFC: 3D-printed stepped flow fields lift power density to 672 mW cm -2 ; flexible TangoPlus plates enable bendable fuel cells for wearables.
• Electrolyzers: Gradient Ni PTL shrugs off 1 A cm -2 for 1 000 h; SLM Ti BP delivers 2 A cm -2 at 1.715 V without noble-metal substrates.
• Challenges & Opportunities: Sub-µm resolution, surface finish and long-term corrosion remain. Next targets are AI-driven inverse design, recyclable photopolymers and roll-to-roll multi-nozzle systems.
This review provides a blueprint for additive manufacturing to unlock scalable, low-cost hydrogen energy devices. Stay tuned for further advances from Prof. Wang, Prof. Yang and Prof. Zhang!
Nano-Micro Letters
Experimental study
Advancements and Innovations in Low Temperature Hydrogen Electrochemical Conversion Devices Driven by 3D Printing Technology
8-Sep-2025