Two-dimensional fluorine-free mesoporous Mo2C MXene via UV-induced selective etching of Mo2Ga2C for energy storage

Mei, Jun and Ayoko, Godwin A. and Hu, Chunfeng and Bell, John M. and Sun, Ziqi (2020) Two-dimensional fluorine-free mesoporous Mo2C MXene via UV-induced selective etching of Mo2Ga2C for energy storage. Sustainable Materials and Technologies, 25:e00156. ISSN 2214-9929


As an emerging and important family of two-dimensional (2D) nanomaterials, MXene has demonstrated to be a type of promising electrode materials for energy storage devices. Hazardous fluorine-containing acids are commonly applied in exfoliation synthesis of MXenes, which bring about additional safety and environmental concerns. Herein, we proposed a novel and effective UV-induced selective etching method to fabricate fluorine-free mesoporous Mo2C MXene from Mo2Ga2C bulk ceramic in several hours. The resultant MXene exhibits a distinct 2D sheet-like structure without much contamination of impurity ions. When the as-synthesized Mo2C MXene is explored as potential anode materials for rechargeable batteries, excellent rate capability and cycling stability are achieved for both lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). Furthermore, the assembled flexible Mo2C MXene-based batteries manifested excellent capacity retentions under bending states. Therefore, this Mo2C MXene has great potential for practical energy storage applications. This innovative approach can be further developed for fabricating other MXenes from UV-sensitive precursors.

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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to Published version in accordance with the copyright policy of the publisher.
Faculty/School / Institute/Centre: No Faculty
Faculty/School / Institute/Centre: No Faculty
Date Deposited: 18 Sep 2020 01:47
Last Modified: 30 Sep 2020 03:24
Uncontrolled Keywords: 2D materials; MXene; batteries; Mo2C; non-fluorine etching
Fields of Research (2008): 09 Engineering > 0912 Materials Engineering > 091299 Materials Engineering not elsewhere classified
09 Engineering > 0913 Mechanical Engineering > 091305 Energy Generation, Conversion and Storage Engineering
09 Engineering > 0906 Electrical and Electronic Engineering > 090608 Renewable Power and Energy Systems Engineering (excl. Solar Cells)
10 Technology > 1007 Nanotechnology > 100708 Nanomaterials
Fields of Research (2020): 40 ENGINEERING > 4016 Materials engineering > 401699 Materials engineering not elsewhere classified
40 ENGINEERING > 4017 Mechanical engineering > 401703 Energy generation, conversion and storage (excl. chemical and electrical)
40 ENGINEERING > 4008 Electrical engineering > 400803 Electrical energy generation (incl. renewables, excl. photovoltaics)
40 ENGINEERING > 4018 Nanotechnology > 401807 Nanomaterials
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