| 학회 | 한국재료학회 |
| 학술대회 | 2020년 가을 (11/18 ~ 11/20, 휘닉스 제주 섭지코지) |
| 권호 | 26권 1호 |
| 발표분야 | 특별심포지엄6. 차세대 배터리 심포지엄-오거나이저: 김종순(세종대) |
| 제목 | Neutron Diffraction Studies on Layered Cathode Materials for Li Rechargeable Batteries |
| 초록 | The key issue to the success of electric vehicles lies in the advancement of cathode materials for Li rechargeable batteries (LRBs). Layered transition metal oxide materials composed of Ni, Co, and Mn, known as LiNixCoyMn1−x−yO2 (NCM) materials, have been successfully commercialized owing to their high energy density. However, increasing energy density of NCM materials by increasing Ni contents generally accompanies the capacity decay and undesirable safety problems during charge and discharge, which are closely related to the structural stability of the electrode materials.1,2 To develop better layered cathode materials, monitoring the crystal structure of electrode materials and structural evolution at various conditions (e.g. temperature, state of charge, etc.) is a critical issue these days.3 Neutron diffraction techniques have been widely used to investigate the crystal structure of electrode materials for LRBs on the merit of the direct interaction of neutrons with the atomic nucleus, which enable us to investigate a detailed structure of electrode materials containing light elements, such as Li, Na, and O.4 Furthermore, a quantitative discussion on neighborhood elements in the periodic table such as Mn, Fe, Co, and Ni are comparably easy, which is difficult with an X-ray. In this presentation, we will demonstrate recent neutron diffraction studies on layered cathode materials for Li rechargeable batteries. Also, recent neutron scattering research trends on LRBs will be briefly introduced. References 1. J. Zheng et al. J. Am. Chem. Soc. 2016, 138, 13326-13334. 2. D. Larcher et al. Nat. Chem. 2015, 7, 19-29. 3. C. P. Grey et al. Nat. Mater. 2017, 16, 45-56. 4. A. M. Balagurov et al. Russ. Chem. Rev. 2014, 83, 1120. |
| 저자 | 김형섭 |
| 소속 | 한국원자력(연) |
| 키워드 | Neutron diffraction; Li rechargeable batteries; cathode materials; Crystal structure |
