Supercabatteries combine the advantages of high power and energy density performances. However, the electrodes are always fabricated using high surface area materials and traditional slurry coating method containing the solvent mixing and drying processes, which are less controlled, energy-intensive, and environmentally unfriendly. Herein, we report a solvent-free method in pilot stage, combining a high-speed air blowing, hot-rolling, and hot overlying process. The carbon materials with high content of 40% are mixed in the LiFePO₄-activated carbons cathode and Li₄Ti₅O₁₂-activated carbons anode, respectively. The compact densities of the thick solvent-free electrodes (120 μm, one-side) are almost ~1.6 times of the values for the slurry coating electrodes. The solvent-free full cells show capacitive linear charge/discharge curves before the cell voltage plateaus. And these linear curves further mitigate the internal resistance drop at −40 °C using acetonitrile-assistant carbonate-based eutectic electrolytes. The full cell delivers high areal capacity of 1.4 mAh cm⁻² and volume energy density of 95 Wh L⁻¹, which is almost 2 times higher than that of the slurry coating full cell. Moreover, the supercabattery with acetonitrile-assistant electrolyte shows excellent cycling retention of 92% for over 5000 cycles due to the self-passivated solid electrolyte interface formation and stable fibrous polytetrafluoroethylene net-like binding structure.

超级电池结合了高功率和高能量密度性能的优点。然而，电极总是使用高表面积材料和包含溶剂混合和干燥过程的传统浆料涂覆方法来制造的，这些方法的控制较少，能耗大且对环境不利。在此，我们报告了一种试验阶段的无溶剂方法，该方法结合了高速吹气，热轧和热覆层工艺。将高含量40％的碳材料混合在LiFePO ₄活化的碳阴极和Li ₄ Ti ₅ O _12中活性炭阳极。厚的无溶剂电极（120μm，一侧）的紧密密度几乎是浆料涂覆电极值的约1.6倍。无溶剂的满电池在电池电压平稳之前显示出电容线性充电/放电曲线。而且，这些线性曲线进一步减轻了使用乙腈辅助碳酸盐共晶电解质在-40°C时的内部电阻下降。满电池可提供1.4 mAh cm ^-2的高面积容量和95 Wh L ^-1的体积能量密度，几乎是浆液涂布满电池的2倍。此外，由于自钝化固体电解质界面的形成和稳定的纤维状聚四氟乙烯网状结合结构，具有乙腈辅助电解质的超级电池在超过5000个循环中显示出92％的出色循环保持率。