Porous Two-Dimensional Transition Metal Carbide (MXene) Flakes for High-Performance Li-Ion Storage
2016 (English)In: CHEMELECTROCHEM, ISSN 2196-0216, Vol. 3, no 5, 689-693 p.Article in journal (Refereed) PublishedText
Herein we develop a chemical etching method to produce porous two-dimensional (2D) Ti3C2Tx MXenes at room temperature in aqueous solutions. The as-produced porous Ti3C2Tx (p-Ti3C2Tx) have larger specific surface areas and more open structures than their pristine counterparts, and can be fabricated into flexible films with, or without, the addition of carbon nanotubes (CNTs). The as-fabricated p-Ti3C2Tx/CNT films showed significantly improved lithium ion storage capabilities compared to pristine Ti3C2Tx based films, with a very high capacity of approximate to 1250 mAhg(-1) at 0.1 C, excellent cycling stability, and good rate performance (330 mAhg(-1) at 10 C). Using the same chemical etching method, we also made porous Nb2CTx and V2CTx MXenes. Therefore, this study provides a simple, yet effective, procedure to introduce pores into MXenes and possibly other 2D sheets that in turn, can enhance their electrochemical properties.
Place, publisher, year, edition, pages
WILEY-V C H VERLAG GMBH , 2016. Vol. 3, no 5, 689-693 p.
etching; Li-ion storage; MXene; partial oxidation; porous 2D materials
IdentifiersURN: urn:nbn:se:liu:diva-130670DOI: 10.1002/celc.201600059ISI: 000379985500002OAI: oai:DiVA.org:liu-130670DiVA: diva2:954149
Funding Agencies|Chinese Scholarship Council (CSC); Fluid Interface Reactions, Structures and Transport (FIRST) Center, an Energy Frontier Research Center - U.S. Department of Energy, Office of Science, and Office of Basic Energy Sciences; Honda Research Institute USA, Inc.2016-08-202016-08-192016-08-20