Journal
JOURNAL OF POWER SOURCES
Volume 196, Issue 3, Pages 1508-1512Publisher
ELSEVIER
DOI: 10.1016/j.jpowsour.2010.08.031
Keywords
Batteries; Energy storage; Aging; Atomic force microscope (AFM); Electric vehicles (EV); Kelvin probe microscopy (KPM)
Funding
- Institute for Materials Research (IMR) at The Ohio State University
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In lithium-ion batteries, several electrical and physical parameters are responsible for the degradation of the electrode materials. Here the application of Kelvin probe microscopy (KPM) is demonstrated to measure the charge sustaining capability of the LiFePO4 cathode under aged and unaged conditions. The aged sample shows lower surface potential than the unaged sampled, which can be attributed to changes in physical and chemical properties including particle size, phase of the surface layer and nanocrystalline deposits. (C) 2010 Elsevier B.V. All rights reserved.
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