Liu Zeyan, Peng Bosi, Tsai Yu-Han Joseph, Zhang Ao, Xu Mingjie, Zang Wenjie, Yan XingXu, Xing Li, Pan Xiaoqing, Duan Xiangfeng, Huang Yu
Department of Materials Science and Engineering, University of California, Los Angeles, Los Angeles, CA, USA.
Department of Chemistry and Biochemistry, University of California, Los Angeles, Los Angeles, CA, USA.
Nat Nanotechnol. 2025 Mar 24. doi: 10.1038/s41565-025-01895-3.
Proton exchange membrane fuel cells feature considerable scalability advantages over lithium-ion batteries for heavy-duty-vehicle applications. The different driving behaviours and operating conditions of heavy-duty vehicles pose challenging requirements, particularly on fuel cell lifetime and efficiency. Here we report the design of a graphene-nanopocket-protected, pore-confined and electrochemically accessible Pt nanocatalyst supported on Ketjenblack carbon for heavy-duty-vehicle applications. The membrane electrode assembly made from these nanocatalysts delivers an initial mass activity of 0.74 A mg and a high rated power density of 1.08 W cm, as well as extraordinary long-term durability with an ultrasmall rated power loss of 1.1% after 90,000 aggressive square-wave cycles. The remarkable activity and durability throughout the operation conditions promise an unprecedentedly long fuel cell lifetime of over 200,000 h and high peak efficiency of 71.9%, making it highly attractive for emerging heavy-duty fuel cell applications.
对于重型车辆应用，质子交换膜燃料电池相较于锂离子电池具有显著的可扩展性优势。重型车辆不同的驾驶行为和运行条件提出了具有挑战性的要求，尤其是对燃料电池的寿命和效率。在此，我们报告了一种用于重型车辆应用的、负载在科琴黑碳上的、由石墨烯纳米口袋保护、孔限制且具有电化学可及性的铂纳米催化剂的设计。由这些纳米催化剂制成的膜电极组件具有0.74 A mg的初始质量活性和1.08 W cm的高额定功率密度，以及非凡的长期耐久性，在90,000次激进方波循环后额定功率损失超小，仅为1.1%。在整个运行条件下的卓越活性和耐久性保证了前所未有的超过200,000小时的燃料电池寿命和71.9%的高峰效率，使其对新兴的重型燃料电池应用极具吸引力。
