LAUSR

To satisfy the requirements for various electric systems and energy storage devices with both high energy density and power density as well as long lifespan, sodium-ion capacitors (SICs) consisting of battery anode and supercapacitor cathode, have attracted much attention due to the abundant resources and low cost of sodium source. SICs bridge the gap between the batteries and the supercapacitors, which can be used as competitive candidates for large-scale energy storage. In this review, the battery-type anode materials and the capacitor-type cathode materials are classified and introduced in detail. The advantages of various electrolytes including organic electrolytes, aqueous electrolytes and ion liquid electrolytes are also discussed sequentially. In addition, from the perspective of practical value, the presentations of the SICs at the current situation and the potential application in urban rail are displayed. Finally, the challenge, future research and prospects towards the SICs are put forward. 现代社会对电力系统和能源存储设备的能量密度、功率密 度和工作寿命提出了更高的要求. 为了满足这一需求, 电池型负极 和电容型正极组成的新型钠离子混合电容由于具有储备资源丰富 和价格低廉的特点, 引起了人们的广泛关注. 值得一提的是, 钠离子 混合电容在电池和超级电容器这两种储能方式之间起到了关键的 桥梁作用, 使其在未来的大规模储能领域具有强大竞争力. 本文对 电池型负极材料和电容型正极材料进行了细致的分类和介绍, 并 对有机系电解质、水系电解质和离子液体电解质等多种电解质的 特点进行了深入讨论. 此外, 我们对钠离子混合电容的应用现状及 其在城市轨道交通中的潜在应用做了详细讨论. 最后, 分析了钠离 子混合电容目前所面临的挑战, 并对其未来的发展方向作出了展 望.