Mesoporous MXene powders synthesized by acid induced crumpling and their use as Na-ion battery anodes

By Varun Natu, Mallory Clites, Ekaterina Pomerantseva, Michel W. Barsoum. 2018

136 citations recorded by the source corpus.

ABSTRACT Manipulating the shapes of, otherwise flat, two-dimensional, 2D, flakes is important in many applications. Herein by simply decreasing the pH of a Ti3C2Tx MXene colloidal suspension, the 2D nanolayers crash out into crumpled flakes, resulting in randomly oriented powders, with a mesoporous architecture. Electrodes made with the latter showed capacities of 250 mAh g−1 at 20 mA g−1 in sodium-ion batteries. The rate performance, 120 mAh g−1 at 500 mA g−1, was also respectable. This acid-induced, reversible, crumpling approach is facile and scalable and could prove important in electrochemical, biological, catalytic, and environmental MXene-based applications. GRAPHICAL ABSTRACT IMPACT STATEMENT By simply decreasing the pH of a Ti3C2Tx colloidal suspension, we induce the 2D flakes flocculate into mesoporous crumpled flakes, that we then show can be used as Na-ion battery anodes.

Subfields: Electrical and Electronic Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/1d5de2d225c3bb27cfa588c294aa9d4c837d031c

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In Electrical and Electronic Engineering

1. Varun Natu
2. Xi Zhu
3. Hang Ling
4. Yanheng Xu
5. Yifan Wang
6. Menglei Hu
7. M. Carey
8. Michel W. Barsoum

In Materials Chemistry

1. Xi Zhu
2. Yifan Wang
3. Hang Ling
4. Yanheng Xu
5. Menglei Hu
6. Varun Natu
7. Maxim Sokol
8. M. Carey

Citations in the corpus

• 2D Ti3C2Tz MXene Synthesized By Water-Free Etching of Ti3AlC2 in Polar Organic Solvents (2020, methodology): “These peaks are ascribed to Na-intercalation into the conducting carbon added into the electrodes, but the capacity contribution from this conducting carbon is negligible as shown in our earlier reports.(3) A pair of small and broad redox peaks can be detected in a wide potential range of 1.”
• MXenes: focus on optical and electronic properties and corresponding applications (2020, methodology): “Otherwise, the ultrathin sheets can be processed by various ways: vacuum filtration [56], spin coating [27, 60], acid or base crumpling [58], and electrophoretic deposition [61].”