A Non-Aqueous Asymmetric Cell with a Ti2C-Based Two-Dimensional Negative Electrode

Jérémy Come (1, 2) , M. Naguib (3) , Patrick Rozier (1, 2) , M. W. Barsoum (3) , Y. Gogotsi (3) , Pierre-Louis. Taberna (1, 2) , Mathieu Morcrette (1, 4) , Patrice Simon (1, 2)

1 RS2E - Réseau sur le stockage électrochimique de l'énergie
2 CIRIMAT - Centre interuniversitaire de recherche et d'ingenierie des matériaux
3 Department of Materials Science and Engineering and A. J. Drexel Nanotechnology Institute ( Philadelfia, USA)
4 LRCS - Laboratoire réactivité et chimie des solides - UMR CNRS 7314

A new MXene phase, Ti2C, obtained by aluminum extraction from Ti2AlC and exfoliation of the reaction product, was electrochemically studied vs. Lithium. Li-ions insertion into the 2-D structure was characterized by in situ XRD measurements. Additional electrochemical kinetic characterizations of Ti2C, using a cavity micro-electrode, showed that the electrochemical reactions involve two different phenomena: one diffusion-limited, the other not. A Ti2C/activated carbon asymmetric cell was assembled to highlight the high rate performance of the MXene. The cell was cycled between 1.0 V and 3.5 V, and showed good capacity retention during 1000 galvanostatic charge/discharge cycles at rates up to 10C.

Domaines: Matériaux; Energie électrique

Jérémy Come, M. Naguib, Patrick Rozier, M. W. Barsoum, Y. Gogotsi, et al.. A Non-Aqueous Asymmetric Cell with a Ti2C-Based Two-Dimensional Negative Electrode. Journal of The Electrochemical Society, 2012, 159 (8), pp.A1368-A1373. ⟨10.1149/2.003208jes⟩. ⟨hal-00821063⟩