Hybrid mobile ion capacitors (HMIC) are proposed as a way to incorporate the advantages of both batteries and supercapacitors into one system. Unfortunately, considering the much slower Li⁺ intercalation/deintercalation process, finding a suitable battery anode material with a high rate performance is still a major challenge. Herein, the fabrication of nitrogen‐doped laser‐scribed graphene (NLSG) with a 3D structure as a binder‐free and conductive additive‐free anode is reported. This NLSG anode has high nitrogen and oxygen doping (8.6 and 6.3 at%), leading to the formation of conductive electrodes with an expanded lattice spacing, providing more convenient pathways and reaction sites for Li⁺ ions. Hybrid Li‐ion capacitors (HLICs) are assembled by combining the NLSG anodes with hierarchical porous carbon (PC) cathodes. The NLSG//PC HLICs show an energy density (including the total weight of two electrodes) of 186 Wh kg⁻¹ at 200 W kg⁻¹. Even when power density increases to the level of conventional supercapacitors (20 kW kg⁻¹), an energy density of 76 Wh kg⁻¹ is still be obtained. Further, the devices exhibit excellent cycle life, retaining 87.5% of the initial value after 5000 cycles. Herein, laser‐scribed graphene is demonstrated as a very promising electrode for mobile ion capacitors.

中文翻译：

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通过3D激光划刻石墨烯实现的全碳混合移动离子电容器

提出了混合移动离子电容器（HMIC）作为一种将电池和超级电容器的优点整合到一个系统中的方法。不幸的是，考虑到慢得多的Li ⁺嵌入/去嵌入过程，找到合适的具有高倍率性能的电池负极材料仍然是一个重大挑战。本文报道了3D结构的掺氮激光划线石墨烯（NLSG）作为无粘合剂和无导电添加剂的阳极的制造方法。这种NLSG阳极具有较高的氮和氧掺杂（8.6和6.3 at％），导致形成具有扩大的晶格间距的导电电极，为Li ⁺提供了更方便的途径和反应部位离子。混合锂离子电容器（HLIC）是通过将NLSG阳极与分层多孔碳（PC）阴极组合在一起而组装而成的。所述NLSG // PC HLICs显示的能量密度（包括两个电极的总重量）的186瓦时千克^-1在200瓦千克^-1。即使当功率密度增加到常规超级电容器的水平（20 kW kg ^-1）时，仍然可以获得76 Wh kg ^-1的能量密度。此外，这些器件具有出色的循环寿命，在5000次循环后仍保持初始值的87.5％。本文中，激光划刻的石墨烯被证明是用于移动离子电容器的非常有前途的电极。