The sodium ion hybrid capacitor (SHC) has been attracting much attention. However, the SHC's power density is significantly confined to a low level due to the sluggish ion diffusion in the anode. Herein, we propose to use an electrode with a high double layer capacitance as the anode in the SHC instead of insertion anodes. To this aim, nitrogen doped hollow carbon nanowires (N-HCNWs) with a high specific surface area are prepared, and the high capacitive contribution during the sodium ion storage process is confirmed by a series of electrochemical measurements. A new SHC consisting of a N-HCNW anode and a commercial active carbon (AC) cathode is fabricated for the first time. Due to the hybrid charge storage mechanism combining ion insertion and capacitive process, the as-fabricated SHC strikes a balance between the energy density and power density, a energy density of 108 Wh kg⁻¹ and a power density of 9 kW kg⁻¹ can be achieved, which overwhelms the electrochemical performances of most reported AC-based SHCs.

钠离子混合电容器（SHC）受到了广泛的关注。但是，由于阳极中缓慢的离子扩散，SHC的功率密度明显限制在一个较低的水平。在这里，我们建议使用具有高双层电容的电极作为SHC中的阳极，而不是插入阳极。为此，制备了具有高比表面积的氮掺杂空心碳纳米线（N-HCNWs），并通过一系列电化学测量证实了钠离子存储过程中的高电容贡献。首次制造了由N-HCNW阳极和市售活性炭（AC）阴极组成的新型SHC。由于结合了离子插入和电容过程的混合电荷存储机制，^-1和9 kW kg ^-1的功率密度可以实现，这压倒了大多数报道的基于AC的SHC的电化学性能。