Abstract
Design and construction of versatile nanostructured SnO2/C composites is still an efficient strategy for developing advanced SnO2-based lithium-ion battery anode materials. Generally, the composite way of carbon and SnO2 in SnO2/C is that the nanostructured SnO2 is coated by a smooth carbon coating. It is believed that if the SnO2 is coated by a characteristically non-smooth three-dimensional (3D) carbon coating rather than smooth carbon coating, the lithium storage properties of SnO2/C would be greatly improved owing to the sufficient free space and larger surface area of 3D structure. However, the SnO2/C composites with a 3D carbon coating are rarely reported because of the difficulty in preparation. In this work, an interestingly nanostructured SnO2/C composite (SnO2@C) with a uniquely non-smooth carbon coating has been prepared via a carefully devised strategy, which consists of uniquely 3D jagged carbon coating porous SnO2 quasi-nanocubes. Thus unique architecture offers SnO2@C enhanced electrochemical kinetics and superior structural stability when served as a lithium-ion battery anode material. Consequently, the SnO2@C displays extraordinaire cycle performance and outstanding rate capability, releasing capacity of 1089.5 mAh g−1 at 200 mA g−1 after even 400 cycles, as well as 479.2 mAh g−1 even at 3000 mA g−1.
Published Version
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