We report a strategy to employ two-dimensional Ti₃C₂T_x MXene as a flexible, conductive, and electrochemically active binder for one-step fabrication of MXene-bonded activated carbon as a flexible electrode for supercapacitors in an organic electrolyte. In this electrode, the activated carbon particles are encapsulated between the MXene layers, eliminating the need for insulative polymer binders. MXene plays a multifunctional role in the electrode, including as a binder, a flexible backbone, a conductive additive, and an additional active material. The synergetic effect of MXene and activated carbon constructs a three-dimensional conductive network and enlarges the distance between the MXene layers, greatly enhancing the electrode capacitance and rate capability. As a result, the flexible MXene-bonded activated carbon electrode exhibits a high capacitance of 126 F g^–1 at 0.1 A g^–1 and a retention of 57.9% at 100 A g^–1 in an organic electrolyte, which is required for developing high-performance, flexible supercapacitors.

中文翻译：

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MXene键合活性炭作为高性能超级电容器的柔性电极

我们报告了一种采用二维Ti ₃ C ₂ T _x的策略MXene是一种柔性，导电且具有电化学活性的粘合剂，可一步制造MXene键合的活性炭，用作有机电解质中超级电容器的柔性电极。在该电极中，活性炭颗粒被封装在MXene层之间，从而消除了对绝缘聚合物粘合剂的需求。MXene在电极中起着多功能的作用，包括作为粘合剂，柔性主链，导电添加剂和其他活性材料。MXene和活性炭的协同作用构成了三维导电网络，并扩大了MXene层之间的距离，极大地增强了电极的电容和倍率能力。结果，柔性的MXene键合活性炭电极表现出126 F g ^–1的高电容在0.1 A g ^{–1的条件下}，在100 A g ^–1的有机电解质中的保留率为57.9％，这是开发高性能，柔性超级电容器所必需的。