Micro-super capacitors are important on-chip micro-power sources for miniaturized electronic devices. Although the performance of micro-super capacitors has been significantly advanced by fabricating nanostructure materials, developing thin-film manufacture technologies and device architectures, their power densities remain far from those of electrolytic capacitors. Here we demonstrate the importance of synergistic effects between Stanene and molybdenum dioxide (MnO2) and their beneficial role as composites for Electrochemical Capacitors (ECs). Based on the first principle calculations, we find two- dimensional tin films, Stanene are Quantum Spin Hall (QSH) insulators that can be effectively tuned by chemical fictionalization and by external strain. First , introduction and the properties synthesis strategies and the use of Stanene is briefly given followed by a review on the preparation of Stanene/MnO2 composite and finally the prospect and future challenges of it for energy storage are discussed.