储能科学与技术 ›› 2022, Vol. 11 ›› Issue (4): 1165-1174.doi: 10.19799/j.cnki.2095-4239.2021.0480

• 国际优秀储能青年 • 上一篇    下一篇

MXenes胶体氧化的调控策略及其对超级电容器性能的影响

郭铁柱1,2(), 周迪2, 张传芳1()   

  1. 1.瑞士联邦理工学院,联邦材料科学与技术研究所,瑞士 杜本多夫 CH -8600
    2.西安交通大学电子科学与工程学院,陕西 西安 710049
  • 收稿日期:2021-09-13 修回日期:2021-10-07 出版日期:2022-04-05 发布日期:2022-04-11
  • 通讯作者: 张传芳 E-mail:tiezhu.guo@empa.ch;chuanfang.zhang@empa.ch
  • 作者简介:郭铁柱(1993—),男,博士研究生,主要从事2D MXenes材料的应用,E-mail:tiezhu.guo@empa.ch
  • 基金资助:
    瑞士联邦理工学院联邦材料所内部基金(Empa-IRC2019);国家留学基金(202106280247)

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

摘要:

超级电容器作为能量存储器件,因具有较快的充放电速率、较高的功率密度和长的循环寿命等特点被广泛研究。MXenes因具有高电导率、高电化学活性、易成膜和亲水性等特点而被广泛应用在超级电容器领域,并展示了出色的储能性能。然而其面临着环境敏感、易氧化降解等严峻挑战,生成几乎没有电容量贡献的TiO2等产物,严重阻碍了MXenes基超级电容器的发展。探索MXenes胶体稳定性的优化策略,并实现其稳定性的选择性调控,对提升MXenes在超级电容器及其他不同应用场合的性能具有重要的现实意义。为此本文简要总结了抑制MXenes氧化的策略,提出了稳定性选择性调控的总体方案,探讨了选择性调控对超级电容器性能的影响机制,为制备高性能MXenes基超级电容器提供思路。

关键词: MXenes, 稳定性, 超级电容器, 氧化动力学

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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