Energy Storage Science and Technology ›› 2022, Vol. 11 ›› Issue (4): 1165-1174.doi: 10.19799/j.cnki.2095-4239.2021.0480

• Special issue of International Outstanding Young Scientists for Energy Storage • Previous Articles     Next Articles

Strategies for improving MXene colloidal stability and impact on their supercapacitor performance

Tiezhu GUO1,2(), Di ZHOU2, Chuanfang ZHANG1()   

  1. 1.Swiss Federal Laboratories for Materials Science and Technology (EMPA), ETH Domain, überlandstrasse 129, CH-8600, Dübendorf, Switzerland
    2.School of Electronic Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, Shaanxi, China
  • Received:2021-09-13 Revised:2021-10-07 Online:2022-04-05 Published:2022-04-11
  • Contact: Chuanfang ZHANG E-mail:tiezhu.guo@empa.ch;chuanfang.zhang@empa.ch

Abstract:

Supercapacitors have been extensively studied as an energy storage device due to their faster charging-discharging rates, higher power density, and longer service life. MXenes with high conductivity, high electrochemical activity, ease of fabrication into film, hydrophilicity, and other characteristics, are widely used in the field of supercapacitors and exhibit excellent energy storage performance. However, the environmental sensitivity and ease of oxidation degradation, which results in the formation of TiO2 and other compounds that contribute essentially nothing to the capacitance, have significantly hampered the development of high-performance supercapacitors. It is critical to investigate the stability optimization strategy of MXenes colloid and realize the selective regulation of its stability for improving the performance of MXenes in supercapacitors and other potential application fields. Therefore, we summarize the strategies for inhibiting MXenes oxidation, propose an overall scheme of selective stability regulation, and discuss the effect of selective regulation on the performance of supercapacitors, as well as provide suggestions for fabricating high-performance MXenes-based supercapacitors.

Key words: MXenes, stability, supercapacitor, oxidation kinetics

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