Zhu Yuanyuan, Ma Jiaxin, Das Pratteek, Wang Sen, Wu Zhong-Shuai
State Key Laboratory of Catalysis, Dalian Institute of Chemical Physics, Chinese Academy of Sciences, Dalian, 116023, China.
Key Laboratory of Spin Electron and Nanomaterials of Anhui Higher Education Institutes, Suzhou University, Suzhou, 234000, China.
Small Methods. 2023 Aug;7(8):e2201609. doi: 10.1002/smtd.202201609. Epub 2023 Jan 26.
As an emerging class of 2D materials, MXene exhibits broad prospects in the field of supercapacitors (SCs). However, the working voltage of MXene-based SCs is relatively limited (typically ≤ 0.6 V) due to the oxidation of MXene electrode and the decomposition of electrolyte, ultimately leading to low energy density of the device. To solve this issue, high-voltage MXene-based electrodes and corresponding matchable electrolytes are developed urgently to extend the voltage window of MXene-based SCs. Herein, a comprehensive overview and systematic discussion regarding the effects of electrolytes (aqueous, organic, and ionic liquid electrolytes), asymmetric device configuration, and material modification on the operating voltage of MXene-based SCs, is presented. A deep dive is taken into the latest advances in electrolyte design, structure regulation, and high-voltage mechanism of MXene-based SCs. Last, the future perspectives on high-voltage MXene-based SCs and their possible development directions are outlined and discussed in depth, providing new insights for the rational design and realization of advanced next-generation MXene-based electrodes and high-voltage electrolytes.
作为一类新兴的二维材料，MXene在超级电容器（SCs）领域展现出广阔前景。然而，由于MXene电极的氧化和电解质的分解，基于MXene的SCs的工作电压相对有限（通常≤0.6 V），最终导致器件的能量密度较低。为了解决这个问题，迫切需要开发基于MXene的高压电极和相应的可匹配电解质，以扩展基于MXene的SCs的电压窗口。在此，本文对电解质（水性、有机和离子液体电解质）、不对称器件结构以及材料改性对基于MXene的SCs工作电压的影响进行了全面概述和系统讨论。深入探讨了基于MXene的SCs在电解质设计、结构调控和高压机制方面的最新进展。最后，概述并深入讨论了基于MXene的高压SCs的未来前景及其可能的发展方向，为合理设计和实现先进的下一代基于MXene的电极和高压电解质提供了新的见解。
