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MXene: a promising transition metal carbide anode for lithium-ion batteries

Abstract : Herein we report on Li insertion into a new two-dimensional (2-D) layered Ti₂C-based material (MXene) with an oxidized surface, formed by etching Al from Ti₂AlC in HF at room temperature. Nitrogen sorption of treated powders showed desorption hysteresis consistent with the presence of slit-like pores. At 23 m² g-¹, the specific surface area was an order of magnitude higher than untreated Ti₂AlC. Cyclic voltammetry exhibited lithiation and delithiation peaks at 1.6 V and 2 V vs. Li+/Li, respectively. At C/25, the steady state capacity was 225 mAh g-¹; at 1C, it was 110 mAh g-¹ after 80 cycles; at 3C, it was 80 mAh g-¹ after 120 cycles; at 10C, it was 70 mAh g-¹ after 200 cycles. Since Ti₂C is a member of the MXene family - where M is an early transition metal and X is C and/or N - that to date includes Ti₃C₂, Ta₄C₃, TiNbC, and (V₀.₅,Cr₀.₅)₃C₂, our results suggest that MXenes are promising as anode materials for Li-ion batteries.
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Submitted on : Monday, September 23, 2013 - 4:02:13 PM
Last modification on : Friday, January 10, 2020 - 9:08:23 PM
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Michael Naguib, Jérémy Come, Boris Dyatkin, Volker Presser, Pierre-Louis Taberna, et al.. MXene: a promising transition metal carbide anode for lithium-ion batteries. Electrochemistry Communications, Elsevier, 2012, vol. 16, pp. 61-64. ⟨10.1016/j.elecom.2012.01.002⟩. ⟨hal-00864984⟩