RIS ID
127467
Abstract
Nanocomposites of carbon and molybdenum disulfide have attracted much attention due to their significant potential in energy conversion and storage applications. However, the preparation of these 0-D MoS 2 /carbon composites with controllable structures and desirable properties remains a major manufacturing challenge, particularly at low cost suitable for scaling-up. Here, we report a facile solution-based method to prepare porous hierarchical 0-D MoS 2 /carbon nanocomposites with vertical MoS 2 growth on a hollow carbon support, suitable for the electrochemical storage of lithium and sodium ions. The vertically aligned MoS 2 /hollow carbon material shows excellent performance in the storage of a series of alkali-metal ions (e.g. Li + , Na + , and K + ) with high capacity, excellent rate capacity, and stable cyclability. When used for the storage of Li + ions, it possesses a high capacity of over 800 mA h g -1 at a rate of 100 mA g -1 , with a negligibly small capacity decay as low as 0.019% per cycle. At a substantially higher rate of 5 A g -1 , this MoS 2 /carbon nanocomposite still delivers a capacity of over 540 mA h g -1 , showing its excellent performance at high rates. Remarkably, this material uniquely delivers high capacities of over 450 mA h g -1 and 300 mA h g -1 for Na + and K + ion storage, respectively, which are among the highest values reported to date in the literature. These excellent characteristics confirm the hollow MoS 2 /carbon nanocomposites to be a primary contender for next generation secondary batteries.
Grant Number
ARC/DE170100871
Publication Details
Yang, T., Liang, J., Sultana, I., Rahman, M., Monteiro, M. J., Chen, Y., Shao, Z., Silva, S. Ravi. P. & Liu, J. (2018). Formation of hollow MoS2/carbon microspheres for high capacity and high rate reversible alkali-ion storage. Journal of Materials Chemistry A, 6 (18), 8280-8288.