Achieving extremely fast charging yet maintaining high energy density remains a challenge in the battery field. Traditional current collectors, being impermeable to electrolytes, hinder the movement of Li⁺ ions and restrict the high-rate capability of thick electrodes. Here we conceptualize a porous current collector for energy-dense and extremely fast-charging batteries. This porous design allows Li⁺ ions to pass through both the current collector and the separator simultaneously, thereby reducing the effective Li⁺ transport distance by half and quadrupling the diffusion-limited C-rate capability without compromising the energy density. Multilayer pouch cells equipped with this current collector demonstrate high specific energy (276 Wh kg⁻¹) and remarkable fast-charging capabilities at rates of 4 C (78.3% state of charge), 6 C (70.5% state of charge) and 10 C (54.3% state of charge). This porous current collector design is compatible with existing battery manufacturing processes and other fast-charging strategies, enriching battery configurations for designing next-generation batteries.

实现极快的充电同时保持高能量密度仍然是电池领域的挑战。^{传统的集流体不渗透电解质，阻碍了Li +}离子的移动并限制了厚电极的高倍率性能。在这里，我们构思了一种用于能量密集且充电速度极快的电池的多孔集流体。这种多孔设计允许Li ⁺离子同时穿过集电器和隔膜，从而将有效Li ⁺传输距离减少一半，并将扩散限制的C倍率能力提高四倍，而不会影响能量密度。配备该集电器的多层软包电池表现出高比能（276 Wh kg ^-1）以及在 4 C（78.3% 充电状态）、6 C（70.5% 充电状态）和 10 C 倍率下的卓越快速充电能力（54.3% 充电状态）。这种多孔集流体设计与现有的电池制造工艺和其他快速充电策略兼容，丰富了下一代电池设计的电池配置。