Li-ion diffusivity and electrochemical performance of Ni-rich cathode material doped with fluoride ions
- Authors
- Kim, Sung-Beom; Kim, Hyeona; Park, Deok-Hye; Kim, Ji-Hwan; Shin, Jae-Hoon; Jang, Jae-Sung; Moon, Sang-Hyun; Choi, Jin-Hyuk; Park, Kyung-Won
- Issue Date
- 15-Sep-2021
- Publisher
- ELSEVIER
- Keywords
- Lithium-ion batteries; Ni-rich cathode; Fluorine doping; Lithium-ion diffusivity; LiNi0 8Co0 1Mn0 1O2
- Citation
- JOURNAL OF POWER SOURCES, v.506
- Journal Title
- JOURNAL OF POWER SOURCES
- Volume
- 506
- URI
- http://scholarworks.bwise.kr/ssu/handle/2018.sw.ssu/41015
- DOI
- 10.1016/j.jpowsour.2021.230219
- ISSN
- 0378-7753
- Abstract
- Ni-rich cathode materials with high specific capacity of -200 mAh g-1 are suitable for use in Li-ion batteries; however, the stability and cycling properties of these materials in batteries need to be improved. Herein, a solidstate reaction method is used to prepare the Ni-rich ternary cathode (NCM) materials doped with various amounts of F dopant. The F-doping and chemical states of the prepared cathode samples are characterized using X-ray photoelectron spectroscopy. Specifically, the diffusivity of Li+ ions in the cathode samples is measured by various characterization methods. Compared to the undoped NCM sample, the F-doped cathode materials exhibit improved cycle performance owing to the strong bond of the transition metals and F and the improved Li+ ion transport behavior. However, the F-doped NCM cathode with more than an optimal amount of F shows the deteriorated LIB performance owing to the deteriorated Li+ ion transport caused by the Li/Ni antisite defects.
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Collections - College of Engineering > Department of Chemical Engineering > 1. Journal Articles
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