Preparation of large layer spacing bimetallic sulfide hollow nanosphere for high-energy battery system application

Abstract

Currently, the rapid capacity decay of single transition metal sulfide greatly limits its commercial application. In this work, we adopt a simple template method to prepare three-dimensional (3D) hollow nanospheres assembled with ultra-thin nanosheets. The large specific surface area of hollow structure can give a rich electrochemical active site and increase the contact area between the electrode and the electrolyte to promote mass and charge transfer rate, meanwhile, the ultra-thin permeable shell can significantly shorten the ions and electrons path. Moreover, the large layer spacing of MoS2/ReS2 is conducive to the reversible ion reaction, and improves the battery rate and cycle performance. Finally, the rational design and control of heterostructural electrodes with different forms, structures and composition can significantly improve their electrochemical performance for various energy storage components. This work proves the potential application of MoS2/ReS2 material as an effective electrode material for sodium ion batteries, and provides a reference idea for the new materials construction.