|학술대회||2017년 봄 (05/17 ~ 05/19, 목포 현대호텔)|
|발표분야||C. 에너지 재료 분과|
|제목||Synthesis and Characterization of Fe and Mn-based Sodium Metal Oxide with non-transition Metal Doping as Cathode Material for Sodium Ion Batteries|
|초록||The lithium-ion batteries (LIB) have been successfully commercialized and widely applied foe decades in electronic devices, vehicles, etc. due to its high energy density. Recently, sodium-ion batteries (SIB) are center of attention as a next generation rechargeable battery. Compared to LIB, SIB system is more desirable in view point of cost because the sodium source is more abundant and widely distribution. Also, the reaction mechanism of SIB is similar to that of LIB, which is one of the reasons why many researchers are focused on layered metal oxides as cathode materials foe SIB. It is critical for layered material to have stable structure in order to achieve long and stable cycle life performance. Previous studies showed that the electrode material performance can be improved by designing metal oxide composition with various transition metals. Another possible approach is by doping electrochemically inactive, non-transition metal elements such as Al, Mg, Alkali elements. Because these elements are electrochemically inactive, they to not contribute to the capacity but they may contribute to structure stability and ionic mobility.
In this study, non-transition metal element was doped into Fe and Mn-based sodium metal oxide, which is widely known cathode material for SIB.
The electrode material is synthesized by simple solid state synthesis. The structure and property of the material was analyzed by high-resolution X-ray diffraction, scanning electron microscopy and electrochemical test were conducted to evaluate its performance.
|저자||Ji Eun Wang1, Young Hwa Jung2, Soojy Ryu1, Do Kyung Kim1|
|소속||1KAIST, 2Pohang Accelerator Laboratory (PAL)|
|키워드||Sodium Ion Battery; electrode material; layered material|