Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials,Small

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Recent Development of Flexible and Stretchable Supercapacitors Using Transition Metal Compounds as Electrode Materials
Small ( IF 13.0 ) Pub Date : 2021-07-29 , DOI: 10.1002/smll.202101974
Lulu Lyu ₁ , Wytse Hooch Antink _{2,

3} , Young Seong Kim ₂ , Chae Won Kim ₁ , Taeghwan Hyeon _{2,

3} , Yuanzhe Piao _{1,

4}

Affiliation

Flexible and stretchable supercapacitors (FS-SCs) are promising energy storage devices for wearable electronics due to their versatile flexibility/stretchability, long cycle life, high power density, and safety. Transition metal compounds (TMCs) can deliver a high capacitance and energy density when applied as pseudocapacitive or battery-like electrode materials owing to their large theoretical capacitance and faradaic charge-storage mechanism. The recent development of TMCs (metal oxides/hydroxides, phosphides, sulfides, nitrides, and selenides) as electrode materials for FS-SCs are discussed here. First, fundamental energy-storage mechanisms of distinct TMCs, various flexible and stretchable substrates, and electrolytes for FS-SCs are presented. Then, the electrochemical performance and features of TMC-based electrodes for FS-SCs are categorically analyzed. The gravimetric, areal, and volumetric energy density of SC using TMC electrodes are summarized in Ragone plots. More importantly, several recent design strategies for achieving high-performance TMC-based electrodes are highlighted, including material composition, current collector design, nanostructure design, doping/intercalation, defect engineering, phase control, valence tuning, and surface coating. Integrated systems that combine wearable electronics with FS-SCs are introduced. Finally, a summary and outlook on TMCs as electrodes for FS-SCs are provided.

中文翻译：

使用过渡金属化合物作为电极材料的柔性可拉伸超级电容器的最新进展

柔性和可拉伸超级电容器（FS-SC）由于其多功能的柔性/可拉伸性、长循环寿命、高功率密度和安全性而成为可穿戴电子设备的有前途的储能设备。过渡金属化合物 (TMC) 在用作赝电容或类似电池的电极材料时，由于其大的理论电容和法拉第电荷存储机制，可以提供高电容和能量密度。此处讨论了 TMC（金属氧化物/氢氧化物、磷化物、硫化物、氮化物和硒化物）作为 FS-SC 电极材料的最新发展。首先，介绍了不同 TMC、各种柔性和可拉伸基材以及 FS-SC 电解质的基本储能机制。然后，对用于 FS-SC 的基于 TMC 的电极的电化学性能和特征进行了分类分析。使用 TMC 电极的 SC 的重量、面积和体积能量密度总结在 Ragone 图中。更重要的是，重点介绍了实现高性能 TMC 电极的几种最新设计策略，包括材料成分、集电器设计、纳米结构设计、掺杂/嵌入、缺陷工程、相位控制、价调整和表面涂层。介绍了将可穿戴电子设备与 FS-SC 相结合的集成系统。最后，提供了关于 TMC 作为 FS-SC 电极的总结和展望。重点介绍了近期实现高性能 TMC 电极的几种设计策略，包括材料成分、集电器设计、纳米结构设计、掺杂/嵌入、缺陷工程、相位控制、价态调整和表面涂层。介绍了将可穿戴电子设备与 FS-SC 相结合的集成系统。最后，提供了关于 TMC 作为 FS-SC 电极的总结和展望。重点介绍了近期实现高性能 TMC 电极的几种设计策略，包括材料成分、集电器设计、纳米结构设计、掺杂/嵌入、缺陷工程、相位控制、价态调整和表面涂层。介绍了将可穿戴电子设备与 FS-SC 相结合的集成系统。最后，提供了关于 TMC 作为 FS-SC 电极的总结和展望。

更新日期：2021-09-09

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