Structure- and porosity-tunable, thermally reactive metal organic frameworks for high-performance Ni-rich layered oxide cathode materials with multi-scale pores
- Authors
- Park, Jun-Ho; Park, Kwangjin; Han, Dongwook; Yeon, Dong-Hee; Jung, Heechul; Choi, Byungjin; Park, Seong Yong; Ahn, Sung-Jin; Park, Jin-Hwan; Han, Heung Nam; Lee, Kang Hee
- Issue Date
- Jul-2019
- Publisher
- ROYAL SOC CHEMISTRY
- Citation
- JOURNAL OF MATERIALS CHEMISTRY A, v.7, no.25, pp.15190 - 15197
- Journal Title
- JOURNAL OF MATERIALS CHEMISTRY A
- Volume
- 7
- Number
- 25
- Start Page
- 15190
- End Page
- 15197
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/1223
- DOI
- 10.1039/c9ta02462j
- ISSN
- 2050-7488
- Abstract
- We describe for the first time molecular rearrangements in a highly stable and porous Ni-rich layered oxide cathode material (LiNi0.80Co0.15Mn0.05O2, Ni-rich NCM) using a thermally reactive, Co-embedded metal-organic framework (MOF). The thermal decomposition of the MOF on the surface of the active material forms a molecular-level thin layer of CoOx species, which are thought to act as seeds for the dramatic transformation of the surface of the Ni-rich NCM from a layered oxide (R3m) to a more stable spinel-like phase (Fd3m) before cycling and the formation of multi-scale (nano-to-micro) pores in the active particles. These phase transformations and morphology changes are associated with a galvanic replacement reaction between Co ions from the MOF and Ni ions near the surface of Ni-rich NCM, where some of the Ni ions migrate to the neighboring vacant Li sites by the diffusion of Co ions through melted residual lithium. Therefore, the resultant Co-/Ni-rich surface domains with a more stable spinel-like phase as well as a porous microstructure improve the cyclability and thermal stability of the MOF-inspired Ni-rich NCM.
- Files in This Item
- There are no files associated with this item.
- Appears in
Collections - 공과대학 > 기계공학과 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/1223)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.