| 학회 | 한국공업화학회 |
| 학술대회 | 2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 | 19권 1호 |
| 발표분야 | (나노) Nano-Materials for Next-generation Energy Storage System |
| 제목 | Developing the beyond of LiFePO4: 3.9V-LiFeSO4F |
| 초록 | Rechargeable Li ion batteries are widely used as power sources for portable electric and electronic devices. Recently, use of Li ion batteries has been extended to large-scale applications such as electrical vehicles and energy storage systems. In these large scale applications, the energy density and safety of the battery as well as low cost are important. Especially, LiFePO4 has been attracted a lot of attention because of excellent capacity retention with very high rate capability. However, LiFePO4 has a low operating voltage leading to relatively low energy density. Efforts to increase the operating voltage of polyanion-based compounds have been tried by exploiting an inductive effect. LiFeSO4F achieves the highest voltage (3.9 V) among Fe2+/Fe3+ redox couples, and therefore can have higher energy density than LiFePO4. However, full utilization of 3.9V-LiFeSO4F is severely limited by its non-scalable synthesis process and poor electrochemical activity. In this talk, I will discuss about how experimental parameters affect the synthesis of 3.9 V-LiFeSO4F and simple solid-state reaction process. Furthermore, I will talk about the electrochemical properties of LiFeSO4F even though the compound has severe structural disadvantages for facile kinetic property. |
| 저자 | 강병우 |
| 소속 | 포항공과대 |
| 키워드 | |
