| 초록 |
Lithium sulfur battery has become next generation secondary battery, because of its high theoretical capacity(~1675mAh/g) and cheap 'sulfur'. However, the organic sulfur battery has some problems; low kinetics, polysulfide shuttling, unsafe and expensive. The unique redox electrochemical behavior of sulfur in aqueous system, completely different with organic sulfur battery, provides a rational strategy to resolve those problems by designing materials and system. In this research, an unique aqueous sulfur system was briefly tested. Sulfur impregnated N doped activated carbon(NAC-S) was used as an active material and the electrochemical performance was tested with three electrode configuration in aqueous electrolyte. The NAC-S exhibited the capacity around 250mAh/g at 4A/g. Also, to check feasibility, asymmetric cell was tested with commercial LMO//bisalt gel//NAC-S system. Based on this research, the enhanced host material and aqueous system could be implemented in near future. |
