Carbon nanotubes (CNTs) have a large specific surface area and, thus, are expected to have applications as electrodes, e.g., in fuel cells. A CNT-containing composite metal film with high electrode performance could be realized by implementing a large number of CNTs on the film. However, a composite film with a high density of CNTs has not yet been obtained. In the thermal spray field, including cold spray, metal–CNT composite films with more than 20 wt% of carbon nanotubes has not yet been deposited. In this study, high-density CNT-containing metal-based composite films were deposited onto an aluminum substrate by low-pressure cold spray from electroless nickel-plated CNT particles. The electroless nickel plating process caused slight structural damage to the CNTs, whereas the cold spray process did not cause any significant structural damage to the CNTs. Two phases were observed in the films: a CNT-rich layer and a nickel-rich layer. However, the CNTs maintained sufficient adhesive strength to remain attached to the bottom nickel phase. Composite films with at least 65 wt% CNT were produced with our method.

中文翻译：

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低压冷喷涂沉积高密度碳纳米管镍基复合薄膜

碳纳米管（CNT）具有大的比表面积，因此有望用作电极，例如在燃料电池中。通过在膜上实施大量的碳纳米管，可以实现具有高电极性能的含碳纳米管复合金属膜。然而，尚未获得具有高密度CNT的复合膜。在热喷涂领域，包括冷喷涂，碳纳米管含量超过 20 wt% 的金属-CNT 复合薄膜尚未沉积。在这项研究中，高密度含碳纳米管的金属基复合薄膜通过低压冷喷涂从化学镀镍的碳纳米管颗粒沉积到铝基板上。化学镀镍工艺对碳纳米管造成轻微的结构损伤，而冷喷涂工艺不会对碳纳米管造成任何显着的结构损坏。在薄膜中观察到两相：富含 CNT 的层和富含镍的层。然而，碳纳米管保持足够的粘合强度以保持附着在底部镍相上。具有至少 65 wt% CNT 的复合薄膜是用我们的方法生产的。