Bulletin of the American Physical Society
APS March Meeting 2018
Volume 63, Number 1
Monday–Friday, March 5–9, 2018; Los Angeles, California
Session E20: Energy Storage: Mn-based Cathodes
8:00 AM–10:48 AM,
Tuesday, March 6, 2018
LACC
Room: 308B
Sponsoring
Unit:
GERA
Chair: Y. Shirley Meng, University of California San Diego
Abstract ID: BAPS.2018.MAR.E20.1
Abstract: E20.00001 : In Situ Characterization of Battery Materials using X-ray Absorption Spectroscopy*
8:00 AM–8:36 AM
Presenter:
Carlo Segre
(Department of Physics & CSRRI, Illinois Institute of Technology)
Authors:
Yujia Ding
(Department of Physics & CSRRI, Illinois Institute of Technology)
Zhefei Li
(Chemical and Biomolecular Engineering Department, Ohio University)
Elena Timofeeva
(Department of Chemistry, Illinois Institute of Technology)
Carlo Segre
(Department of Physics & CSRRI, Illinois Institute of Technology)
Building on our previous work in modeling Sn-based anode materials, EXAFS modeling and detailed analysis of local environment changes are correlated to the cell capacity and reveal the mechanism of lithiation/delithiation process. Results show that in the first two lithiation/delithiation cycles crystalline Sn4P3 is fully converted to an amorphous SnPx phase, which in further cycles participates in reversible conversion and alloying reactions. The superior reversibility of this material is attributed to the highly dispersed SnPx in the graphite matrix, which provides enhanced electrical conductivity and prevents aggregation of Sn clusters during the lithiation/delithiation process. The gradual capacity fading in long-term cycling is attributed to the observed increase in the size and the amount of metallic Sn clusters in the delithiated state, correlated to the reduced recovery of the SnPx phase. This paper reveals the mechanism responsible for the highly reversible tin phosphides and provides insights for improving the capacity and cycle life of conversion and alloying materials.
*This research was funded in part by U.S. DOE ARPA-e award #AR000387. MRCAT is supported by the Department of Energy and the MRCAT member institutions. Use of the Advanced Photon Source is supported by the U.S. DOE contract #DE-AC02-06CH11357.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.MAR.E20.1
Follow Us |
Engage
Become an APS Member |
My APS
Renew Membership |
Information for |
About APSThe American Physical Society (APS) is a non-profit membership organization working to advance the knowledge of physics. |
© 2024 American Physical Society
| All rights reserved | Terms of Use
| Contact Us
Headquarters
1 Physics Ellipse, College Park, MD 20740-3844
(301) 209-3200
Editorial Office
100 Motor Pkwy, Suite 110, Hauppauge, NY 11788
(631) 591-4000
Office of Public Affairs
529 14th St NW, Suite 1050, Washington, D.C. 20045-2001
(202) 662-8700