Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
10150421 | Electrochimica Acta | 2018 | 36 Pages |
Abstract
Herein, a new nanocomposite was synthesized via in-situ growth of Fe3O4 nanoparticles on MXene Ti3C2 multilayer to improve the electrochemical performance of anodes by integrating the merits of transition metal oxide and Ti3C2, where further surface modification of Fe3O4@Ti3C2 nanocomposites by carbon coating was introduced here. The nanocomposites exhibited excellent electrochemical performance in Li-ion storage when used as the anode materials, which benefited from the combination of the high capacity of magnetite and favorable electrical conductivity of Ti3C2. The optimized Fe3O4@Ti3C2-2.5 (a mass ratio of 1.1) showed a high reversible capacity of 342.9â¯mAh·gâ1 at 1C, which exceeded the theoretical capacity of bare Ti3C2 monolayer (320â¯mAh·gâ1), and an impressive rate reversibility. TEM presented that the carbon layers were homogeneously coated on the surface of nanocomposites with a thickness of approximately 1â¯nm. The electrochemical measurement showed that C-coated Fe3O4@Ti3C2-2.5 presented enhanced cycling performance (382.9â¯mAh·gâ1 at 1C and 236.7â¯mAh·gâ1 at 5C) and cycling stability. This work presents a promising route for preparation of transition metal oxides@MXene nanocomposites as well as further surface modification for advanced Li-ion storage.
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Authors
Fanyu Kong, Xiaodong He, Qianqian Liu, Xinxin Qi, Dongdong Sun, Yongting Zheng, Rongguo Wang, Yuelei Bai,