Surface Changes in Commercial Li-Ion Cells after Life Cycle Testing for Satellites
Date Published: 1999-04-06
Paper Number:1999-01-1388
DOI: 10.4271/1999-01-1388
Citation:
Wasz, M. and Carter, B., "Surface Changes in Commercial Li-Ion Cells after Life Cycle Testing for Satellites," SAE Technical Paper 1999-01-1388, 1999, doi:10.4271/1999-01-1388.
Author(s):
Margot L. Wasz - The Aerospace Corp.
Boyd J. Carter - The Aerospace Corp.
Abstract:
Li-ion cells were cycled as part of a program to assess commercial technologies for space applications. Cells showing capacity loss were disassembled and compared with new cells using scanning electron microscopy (SEM) x-ray diffraction (XRD), and time-of-flight secondary ion mass spectrometry (TOF-SIMS) to determine the underlying cause for the capacity loss. Results indicate a loss of lithium from the cathode and a thicker, non-active, fluorine-rich layer on the surface of the anode.
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