期刊
SOLID STATE IONICS
卷 207, 期 -, 页码 44-49出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.ssi.2011.11.018
关键词
Lithium ion battery; In situ X-ray diffraction; Cathode
资金
- National Science Foundation [DMR-0746902]
- Northeastern Center for Chemical Energy Storage (NECCES)
- U.S. Department of Energy, Office of Science, Office of Basic Energy Sciences [DE-SC 0001294]
- Office of Basic Energy Sciences, U.S. Department of Energy
- Florida Energy System Consortium through University of Florida [80859]
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0746902] Funding Source: National Science Foundation
In situ X-ray diffraction patterns were collected using a laboratory X-ray diffractometer during the first electrochemical charge/discharge cycle of the layered lithium excess compound Li[Li0.2Ni0.2Mn0.6]O-2 in the family of Li[NixLi1/3-2x/3Mn2/3-x/3]O-2 (x=1/5). Dynamic changes in peak positions, lattice parameters, and microstrain help to explain the lithium de-intercalation mechanism in this class of materials. Strong anisotropy is observed in the shifts of the lattice parameters during the first cycle. The in situ electrochemical measurement shows dynamically changing strain during the first electrochemical cycle that is explained by known lithium and transition metal (TM) migration mechanisms. Published by Elsevier B.V.
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