We have developed a highly flexible, ultra-light and thin polymer electrolyte membrane fuel cell that can be used as a portable power source for flexible electronics. To achieve such flexibility and ultra-lightness, we fabricated a thin flow-field plate using a thermal imprinting process and combined it with a laser-machined metal current collector. The air-breathing fuel cell, with a thickness of 0.992 mm and a weight of 2.23 g, demonstrated a total power of 508 mW and a performance degradation of <10% after severe bending fatigue (200 repeated bends). This high power per weight (0.228 W g⁻¹) and robust bending durability have never been observed before. The highly flexible architecture enabled the operation of the fuel cell in an S-shape or even in a rolled-up state without any significant performance loss. We have fabricated a cylindrical planar stack of 10 fuel cells and successfully carried out its outdoor operation to demonstrate its practical applications in various fields.

我们已经开发出一种高度柔性，超轻且薄的聚合物电解质膜燃料电池，可用作燃料电池的便携式电源。为了实现这种灵活性和超轻度，我们使用热压印工艺制造了薄的流场板，并将其与激光加工的金属集电器结合在一起。这种空气呼吸型燃料电池的厚度为0.992毫米，重量为2.23克，在严重的弯曲疲劳（200次重复弯曲）后，总功率为508毫瓦，性能下降小于10％。每单位重量的高功率（0.228 W g ^-1）和强大的弯曲耐久性，之前从未见过。高度灵活的体系结构使燃料电池能够以S形甚至卷起状态运行，而不会造成任何明显的性能损失。我们制造了一个由10个燃料电池组成的圆柱形平面堆，并成功地进行了室外操作，以展示其在各个领域的实际应用。