Flexible power sources are a vital component for smart and wearable electronics. The portability and functionality of these devices are limited by the size, weight, and flexibility of the available batteries. Herein, using the high-pressure solvothermal method, we explored the controllable mass-loading of active materials for flexible lithium-ion capacitor (LIC) and a representative of “PDA-carbon encapsulated reduced graphene oxide supported Ti₂Nb₁₀O₂₉” (TNO/rGO@NC) anode and “three-dimensional holey graphene sheets” (HGS) cathode. When using a commercial application mass-loading level of 10.5 mg cm⁻² for study, the TNO/rGO@NC anode achieves a high specific areal capacity of 2.4 mAh cm⁻² at 0.5C, and 1.2 mAh cm⁻² at an ultra-high rate of 50C, while maintaining 92.4% of initial capacity over 500 cycles at 10C. For the cathode part, the HGS shows 125 mAh g⁻¹ at 1C and no degeneration after 1500 cycles. The assembled LICs achieves a high power density of 6230 kW kg⁻¹ with 123 Wh kg⁻¹ energy density, and good cycling retention of 82.2 % over 1000 cycles at 10C in 0.5–4.0 V. The advantages of flexibility, facile shape design, high mass-loading, high energy/power densities make it a promising energy-storage candidate for wearable and smart electronic devices.

灵活的电源是智能和可穿戴电子产品的重要组成部分。这些设备的便携性和功能受到可用电池的尺寸、重量和灵活性的限制。在此，我们利用高压溶剂热法，探索了柔性锂离子电容器（LIC）活性材料的可控质量负载，并以“PDA-碳封装还原氧化石墨烯负载Ti 2 Nb 10 _O 29 _”为_代表。 TNO/rGO@NC）阳极和“三维多孔石墨烯片”（HGS）阴极。^{当使用10.5 mg cm -2}的商业应用质量负载水平进行研究时，TNO/rGO@NC阳极实现了2.4 mAh cm ^{-2的高比面积容量}在0.5C下电池容量达到1.2mAh cm ^-2，在50C超高倍率下电池容量达到1.2mAh cm -2 ，同时在10C下循环500次后仍能保持92.4%的初始容量。对于阴极部分，HGS在1C下显示出125mAh g ^-1并且在1500次循环后没有退化。^{组装的LIC实现了6230 kW kg -1}的高功率密度和123 Wh kg ^-1的能量密度，以及在10C、0.5-4.0 V下1000次循环后良好的循环保持率82.2%。灵活性、简单的形状设计的优点，高质量负载、高能量/功率密度使其成为可穿戴和智能电子设备的有前途的储能候选者。