Xu, S; Dall'Agnese, Y; Li, J; Gogotsi, Y; Han, W; (2018) Thermally Reduced Graphene/MXene Film for Enhanced Li-ion Storage. Chemistry - A European Journal , 24 (69) pp. 18556-18563. 10.1002/chem.201805162.

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Abstract

Two-dimensional transition-metal carbides called MXenes are emerging electrode materials for energy storage due to their metallic electrical conductivity and low ion diffusion barrier. In this work, we combined Ti2 CTx MXene with graphene oxide (GO) followed by a thermal treatment to fabricate flexible rGO/Ti2 CTr film, in which electrochemically active rGO and Ti2 CTr nanosheets impede the stacking of layers and synergistically interact producing ionically and electronically conducting electrodes. The effect of the thermal treatment on the electrochemical performance of Ti2 CTx is evaluated. As anode for Li-ion storage, the thermally treated Ti2 CTr possesses a higher capacity in comparison to as-prepared Ti2 CTx . The freestanding hybrid rGO/Ti2 CTr films exhibit excellent reversible capacity (700 mAh g-1 at 0.1 Ag-1 ), cycling stability and rate performance. Additionally, flexible rGO/Ti3 C2 Tr films are made using the same method and also present improved capacity. Therefore, this study provides a simple, yet effective, approach to combine rGO with different MXenes, which can enhance their electrochemical properties for Li-ion batteries.

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