Sodium and lithium storage properties of spray-dried molybdenum disulfide-graphene hierarchical microspheres

Authors

Sujith Kalluri, University of WollongongFollow
Kuok Hau Seng, University of WollongongFollow
Zaiping Guo, University of WollongongFollow
Aijun Du, University of Queensland, Queensland University of Technology
Konstantin K. Konstantinov, University of WollongongFollow
Hua-Kun Liu, University of WollongongFollow
S X. Dou, University of WollongongFollow

RIS ID

102098

Publication Details

Kalluri, S., Seng, K. Hau., Guo, Z., Du, A., Konstantinov, K., Liu, H. Kun. & Dou, S. Xue. (2015). Sodium and lithium storage properties of spray-dried molybdenum disulfide-graphene hierarchical microspheres. Scientific Reports, 5 11989-1-11989-8.

Abstract

Developing nano/micro-structures which can effectively upgrade the intriguing properties of electrode materials for energy storage devices is always a key research topic. Ultrathin nanosheets were proved to be one of the potential nanostructures due to their high specific surface area, good active contact areas and porous channels. Herein, we report a unique hierarchical micro-spherical morphology of well-stacked and completely miscible molybdenum disulfide (MoS₂) nanosheets and graphene sheets, were successfully synthesized via a simple and industrial scale spray-drying technique to take the advantages of both MoS₂ and graphene in terms of their high practical capacity values and high electronic conductivity, respectively. Computational studies were performed to understand the interfacial behaviour of MoS₂ and graphene, which proves high stability of the composite with high interfacial binding energy (-2.02 eV) among them. Further, the lithium and sodium storage properties have been tested and reveal excellent cyclic stability over 250 and 500 cycles, respectively, with the highest initial capacity values of 1300 mAh g^-1 and 640 mAh g^-1 at 0.1 A g^-1.