Graphene has attracted major interests as electrode materials for energy storage applications. However, the major limitation of using blade- or spin-coated graphene films for fabricating electrode is that the basal plane of the flat-lying graphene is orthogonal to the direction of charge transport, causing sluggish charge transfer kinetics for the coated graphene film. Here we propose a general, scalable strategy to prepare vertically-structured hybrid electrodes using accordion-like, chemically expanded graphite (CEG). The coated CEG rods possess two-dimensional (2D) interlayer galleries that are vertically aligned with respect to the substrate because of their large length-diameter ratio, which facilitates high-efficiency ion transport. Due to its excellent wettability and high electrochemical surface areas, these interlayer galleries allow a high loading of redox-active (RA) materials, including metal (Pt), metal hydroxide (Ni(OH)₂, Fe₂O₃ and MnO₂) or metal dichalcogenide (MoS₂). As an example, Ni(OH)₂-infiltrated CEG shows excellent rate-performance and long-term cycling stability when used as electrochemical electrodes in lithium-ion batteries and supercapacitors.

石墨烯作为储能应用中的电极材料已引起人们的广泛兴趣。然而，使用刮涂或旋涂的石墨烯膜来制造电极的主要限制在于，平坦的石墨烯的基面与电荷传输方向正交，从而导致涂覆的石墨烯膜的电荷转移动力学缓慢。在这里，我们提出了一种通用的，可扩展的策略，以使用类似手风琴状的化学膨胀石墨（CEG）来制备垂直结构的混合电极。涂覆的CEG棒具有二维（2D）层间通道，该通道相对于基材垂直对齐，这是因为它们的长径比大，这有利于高效离子传输。由于其出色的润湿性和较高的电化学表面积，₂，Fe ₂ O ₃和MnO ₂）或金属二卤化物（MoS ₂）。例如，Ni（OH）₂渗透的CEG在锂离子电池和超级电容器中用作电化学电极时显示出极好的速率性能和长期循环稳定性。