Two-Dimensional Titanium Carbide MXene As a Cathode Material for Hybrid Magnesium/Lithium-Ion Batteries

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• 作者：Ayeong Byeon ; Meng-Qiang Zhao ; Chang E. Ren ; Joseph Halim ; Sankalp Kota ; Patrick Urbankowski ; Babak Anasori ; Michel W. Barsoum ; Yury Gogotsi
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2017
• 出版时间：February 8, 2017
• 年：2017
• 卷：9
• 期：5
• 页码：4296-4300
• 全文大小：368K
• ISSN：1944-8252

文摘

As an alternative to pure lithium-ion, Li⁺, systems, a hybrid magnesium, Mg²⁺, and Li⁺ battery can potentially combine the high capacity, high voltage, and fast Li⁺ intercalation of Li-ion battery cathodes and the high capacity, low cost, and dendrite-free Mg metal anodes. Herein, we report on the use of two-dimensional titanium carbide, Ti₃C₂T_x (MXene), as a cathode in hybrid Mg²⁺/Li⁺ batteries, coupled with a Mg metal anode. Free-standing and flexible Ti₃C₂T_x/carbon nanotube composite “paper” delivered ∼100 mAh g^–1 at 0.1 C and ∼50 mAh g^–1 at 10 C. At 1 C the capacity was maintained for >500 cycles at 80 mAh g^–1. The Mo₂CT_x MXene also demonstrated good performance as a cathode material in this hybrid battery. Considering the variety of available MXenes, this work opens the door for exploring a new large family of 2D materials with high electrical conductivity and large intercalation capacity as cathodes for hybrid Mg²⁺/Li⁺ batteries.