Abstract Flexible electrochemical energy storage (EES) devices such as lithium-ion batteries (LIBs) and supercapacitors (SCs) can be integrated into flexible electronics to provide power for portable and steady operations under continuous mechanical deformation. Ideally, flexible EES devices should simultaneously possess high flexibility, high energy density, and high power density, thus requiring appropriate electrode materials, electrolytes, and advanced structural designs of the electrodes. Generally, composite materials with specific components and unique structures have been widely investigated recently as flexible EES devices because these materials endow the devices with good bending, stretching, and compression capacity and are preferable to single-component materials. Thus, in this review work, we will give a detailed overview of the recent progress in composite electrode materials for flexible electrodes and composite electrolytes suitable for the development of flexible LIBs & SCs. We will special focus on the role of composite materials for applications in flexible EES devices of wearable electronics. We also give a brief introduction of structural designs to achieve flexibility and stretchablity in device/system levels. Finally, future perspectives and important research directions are highlighted and discussed.

中文翻译：

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柔性电化学储能：复合材料的作用

摘要 锂离子电池 (LIB) 和超级电容器 (SC) 等柔性电化学储能 (EES) 设备可以集成到柔性电子设备中，为连续机械变形下的便携式和稳定运行提供动力。理想情况下，柔性 EES 设备应同时具有高柔性、高能量密度和高功率密度，因此需要合适的电极材料、电解质和先进的电极结构设计。通常，具有特定成分和独特结构的复合材料最近作为柔性 EES 器件得到了广泛研究，因为这些材料赋予器件良好的弯曲、拉伸和压缩能力，并且优于单成分材料。因此，在本次审查工作中，我们将详细概述用于柔性电极的复合电极材料和适用于开发柔性 LIB 和 SC 的复合电解质的最新进展。我们将特别关注复合材料在可穿戴电子设备的柔性 EES 设备中的应用。我们还简要介绍了结构设计，以实现设备/系统级别的灵活性和可拉伸性。最后，突出并讨论了未来的观点和重要的研究方向。我们还简要介绍了结构设计，以实现设备/系统级别的灵活性和可拉伸性。最后，突出并讨论了未来的观点和重要的研究方向。我们还简要介绍了结构设计，以实现设备/系统级别的灵活性和可拉伸性。最后，突出并讨论了未来的观点和重要的研究方向。