Journal
ELECTROCHIMICA ACTA
Volume 297, Issue -, Pages 961-973Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2018.12.013
Keywords
MXene; EMD; MXene/EMD composites; Lithium-ion battery anode; Electrochemistry
Categories
Funding
- University of the Witwatersrand (Wits)
- National Research Foundation (NRF)
- DST-NRF Centre of Excellence in Strong Materials (CoE-SM)
- Wits Materials for Energy Research Group (MERG)
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The performance of MXenes (Ti2CTx) combined with electrolytic manganese dioxide (EMD) in three different weight ratios (i.e. MXene: EMD = 20:80; 50:50; 80:20) were examined as anode material for Lithium-ion batteries (LIBs). A study of the structure, composition and morphology of the synthesized materials was conducted. The materials were further investigated for their electrochemical properties in a half-cell configuration using impedance spectroscopy measurements, cyclic voltammetry and galvanostatic charge-discharge cycling. Results showed that the combined MXene/EMD material has a greater cycling stability, capacity and rate capability as compared to the EMD. The best ratio was found to be MXene: EMD = 80:20. The capacity obtained for this material after 200 cycles is 460 mA h g(-1) at a current density of 100 mA g(-1). The Li-ion accessibility improved with cycling. This study provides a first insight into the viability of using one of the lightest known MXenes and EMD composite for improved LIB anodes. As EMD is a low cost and abundant material, it provides great opportunities for improved capabilities for lightweight applications at an affordable cost. (C) 2018 Elsevier Ltd. All rights reserved.
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