| 초록 |
Recently sodium ion battery (SIB) has been regarded as the attractive alternative system to lithium ion battery (LIB). The development of SIB comparable to LIB performances has been still recognized as a big challenge. Particularly, the anode materials adequate for SIB have been difficult to develop, because sodium cannot intercalate into graphite used mainly as anode material for LIB. In this study, we focused on enhancing the electrochemical performances of Sb-based anode by designing intermetallic form of Sb with Na-alloyable elements, or inactive metallic element within conductive network buffering the volumetric change. We also controlled the porosity of both bulk Sb electrode and intermetallic SnSb material. Based on the results, reaction mechanism is also suggested of the Sb- nanocomposite and porosity controlled Sb- anode. For raising SIB competitiveness to LIB, we designed SIB full cell with 100 Wh kg-1 based on the total weight and long-term durability by optimizing the cathode/anode materials, electrolyte, and process variables |
