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  • 09월 03일 23시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제122회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Controlled Restacking of Inorganic Nanosheets to Improve their Electrode Performance for Sodium Ion Batteries

2018년 8월 23일 11시 32분 27초
MAT.O-6 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
목 09시 : 35분
Material Chemisty - Oral Presentation of Young Material Chemists
저자 및
Seung Mi Oh, Seong-Ju Hwang1,*
Chemistry Department of Nano-Science, Ewha Womans University, Korea
1Department of Chemistry and Nanoscience, Ewha Womans University, Korea
The stacking structure of layered material is important for optimizing its electrode property because of its profound effect on ion diffusion into the lattice. In this research, the restacked structure of exfoliated MnO2 nanosheet can be controlled by adjusting the concentrations of tetramethylammonium (TMA+) and intercalant alkali metal ions. Powder X-ray diffraction and X-ray adsorption spectroscopic (XAS) analyses clearly demonstrate the maintenance of the original layered structure of MnO2 nanosheet upon the restacking process. According to N2 adsorption-desorption isotherm analysis, the porosity of the restacked MnO2 nanosheets can be tailored by changing the restacking condition. Of prime importance is that the increase of TMA+ concentration leads to the improvement of the discharge capacity of restacked MnO2 nanosheets for sodium ion batteries, indicating the beneficial effect of the high concentration of TMA+ ions on electrode performance. The present study underscores that the fine-control of stacking condition can provide an effective way of optimizing the pore structure and electrode functionality of restacked metal oxide nanosheets.