N- Butyllithium-Treated Ti3 C2 Tx MXene with Excellent Pseudocapacitor Performance

ACS Nano
Xifan ChenXiaobin Fan

Abstract

MXenes, a family of two-dimensional (2D) transition-metal carbide and nitride materials, are supposed to be promising pseudocapacitive materials because of their high electronic conductivity and hydrophilic surfaces. MXenes, prepared by removing the "A" elements of their corresponding MAX phases by hydrofluoric acid (HF) or LiF-HCl etching, possess abundant terminal groups like -F, -OH, and -O groups. It has been proven that the MXenes with fewer -F terminal groups and more -O groups showed a higher pseudocapacitor performance. In organic reactions, -OH and -X (X = halogen) groups could turn to ether groups in strong nucleophilic reagent. Inspired by that, herein, we report an n-butyllithium-treated method to turn the -F and -OH terminal groups to -O groups on the Ti3C2T x MXenes. Two types of Ti3C2T x MXenes prepared by either HF or LiF-HCl etching were systematically investigated, and a comparison with the traditional KOH/NaOH/LiOH-treated method was also carried out. It is found that most of the -F terminal groups on the Ti3C2T x MXenes can be successfully removed by n-butyllithium, and abundant -O terminal groups were formed. The n-butyllithium-treated Ti3C2T x MXenes show promising applications in high-performance pseu...Continue Reading

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Citations

Dec 10, 2019·ChemSusChem·Lu LiXitian Zhang
Oct 30, 2020·Nanoscale·Qicheng ZhangXiaobin Fan
Aug 12, 2020·Chemistry : a European Journal·Jiayong TangLianzhou Wang
Jun 2, 2021·ACS Applied Materials & Interfaces·Peer BärmannJesus Gonzalez-Julian
Sep 25, 2021·ACS Applied Materials & Interfaces·Fan HaoGuiping Ma
Sep 30, 2021·Chemical Communications : Chem Comm·Mengke PengYiwang Chen

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