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A general Lewis acidic etching route for preparing MXenes with enhanced electrochemical performance in non-aqueous electrolyte

Li, Youbing and Shao, Hui and Lin, Zifeng and Lu, Jun and Liu, Liyuan and Duployer, Benjamin and Persson, Per O. Å. and Eklund, Per and Hultman, Lars and Li, Mian and Chen, Ke and Zha, Xian-Hu and Du, Shiyu and Rozier, Patrick and Chai, Zhifang and Raymundo-Piñero, Encarnacion and Taberna, Pierre-Louis and Simon, Patrice and Huang, Qing A general Lewis acidic etching route for preparing MXenes with enhanced electrochemical performance in non-aqueous electrolyte. (2020) Nature Materials, 19 (8). 894-899. ISSN 1476-1122

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Official URL: https://doi.org/10.1038/s41563-020-0657-0


Two-dimensional carbides and nitrides of transition metals, known as MXenes, are a fast-growing family of materials that have attracted attention as energy storage materials. MXenes are mainly prepared from Al-containing MAX phases (where A = Al) by Al dissolution in F-containing solution; most other MAX phases have not been explored. Here a redox-controlled A-site etching of MAX phases in Lewis acidic melts is proposed and validated by the synthesis of various MXenes from unconventional MAX-phase precursors with A elements Si, Zn and Ga. A negative electrode of Ti3C2 MXene material obtained through this molten salt synthesis method delivers a Li+ storage capacity of up to 738 C g−1 (205 mAh g−1) with high charge–discharge rate and a pseudocapacitive-like electrochemical signature in 1 M LiPF6 carbonate-based electrolyte. MXenes prepared via this molten salt synthesis route may prove suitable for use as high-rate negative-electrode materials for electrochemical energy storage applications.

Item Type:Article
HAL Id:hal-03065962
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Chinese Academy of Sciences (CHINA)
Other partners > Collège de France (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Paris - ENSCP (FRANCE)
Other partners > Ecole Nationale Supérieure de Chimie de Montpellier - ENSCM (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > Institut polytechnique de Grenoble (FRANCE)
Other partners > Institut universitaire de France - IUF (FRANCE)
Other partners > Université Paris Sciences & Lettres - PSL (FRANCE)
Other partners > Sichuan University - SCU (CHINA)
Other partners > Sorbonne Université (FRANCE)
Other partners > Université Grenoble Alpes - UGA (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Other partners > Université de Nantes (FRANCE)
Other partners > Université de Picardie Jules Verne (FRANCE)
Other partners > Réseau de stockage électrochimique de l’énergie - Energie RS2E (FRANCE)
Other partners > Linköpings Universitet - LiU (SWEDEN)
Other partners > Université de Pau et des Pays de l'Adour - UPPA (FRANCE)
Other partners > Université de Haute Alsace - UHA (FRANCE)
Other partners > Université de Montpellier (FRANCE)
Laboratory name:
National Natural Science Foundation of China (NNSFC) - China Postdoctoral Science Foundation (CPSF) - China Scolarship Council - Agence Nationale de la Recherche (ANR) - International Partnership Program of Chinese Academy of Sciences (IPPCAS) - Leading Innovative and Entrepreneur Team Introduction Program of Zhejiang - Ningbo top-talent team program - Fundamental Research Funds for the Central Universities (FRFCU) - Swedish Government Strategic Research Area in Materials Science on Functional Materials at Linköping University - Knut and Alice Wallenberg Foundation (KAWF)
Deposited On:16 Dec 2020 11:55

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