Flexible wire shaped energy storage devices grab tremendous attention due to the emergence of wearable and portable electronics markets. Herein, the design principles (fabrication and assembly process) and device performance (electrochemical performance in static and bending conditions) of the lithium-ion capacitor in core-shell wire topology are described. The wire shaped lithium-ion capacitor (WSLIC) assembly consists of multi-walled carbon nanotubes coated carbon fibers (CNT-CFs) core electrode, polymer electrolytes, lithium titanium oxide (LTO) composite outer electrode, helically wrapped current collectors and protective outer covering. This 2.7 V device exhibits a maximum energy density of 1.85 mWh/cm³, comparable to the energy densities of other reported wire-shaped batteries. WSLIC exhibits excellent safety at a high temperature of 60 °C due to plasticized polymer electrolytes of non-volatile composition, challenges may arise if flammable organic electrolytes were employed. The device also exhibits excellent electrochemical performance under different deforming and repeated bending conditions, attributed to unique properties of CNT-CF core electrode and helically wrapped current collectors. Therefore, WSLIC has excellent potential for implementation in wearable applications.

由于可穿戴和便携式电子市场的出现，柔性线形储能设备引起了极大的关注。在此，描述了芯壳线拓扑中的锂离子电容器的设计原理（制造和组装过程）和器件性能（在静态和弯曲条件下的电化学性能）。线形锂离子电容器（WSLIC）组件由涂覆碳纤维（CNT-CFs）的多壁碳纳米管芯电极，聚合物电解质，锂钛氧化物（LTO）复合外部电极，螺旋缠绕的集电器和保护性外壳组成。该2.7 V器件的最大能量密度为1.85 mWh / cm ³与其他报道的线形电池的能量密度相当。WSLIC由于具有非挥发性成分的增塑聚合物电解质，在60°C的高温下具有出色的安全性，如果使用易燃有机电解质，可能会遇到挑战。由于CNT-CF核心电极和螺旋缠绕的集电器的独特性能，该器件在不同的变形和重复的弯曲条件下也表现出出色的电化学性能。因此，WSLIC在可穿戴应用程序中具有极好的实现潜力。