Unraveling and Regulating Self-Discharge Behavior of Ti<sub>3</sub>C<sub>2</sub>T<sub><i>x</i></sub> MXene-Based Supercapacitors
Zixing Wang, Zhong Xu, Haichao Huang, Xiang Chu, Yanting Xie, Da Xiong, Cheng Yan, Haibo Zhao, Haitao Zhang, Weiqing Yang
Abstract
). Therefore, the mixed self-discharge rate from both tight-bonding (contain fewer F elements) and loose-bonding ions (contain more F elements) is accordingly lowered. Through chemically interface-tailored engineering, the significantly changed average oxidation state and local coordination information on MXene affected the interaction of ion counterparts, which was evidently revealed by X-ray absorption fine structures. Theoretically, this greatly improved self-discharge performance was proven to be from higher adsorption energy between the interface of the electrode and the electrolyte by density functional theory. Therefore, this chemically interface-tailored regulation strategy can guide the design of high-performance MXene-based supercapacitors with low self-discharge behavior and will promote its wider commercial applications.