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Title: Mechanical measurements on lithium phosphorous oxynitride coated silicon thin film electrodes for lithium-ion batteries during lithiation and delithiation
Authors: Al-Obeidi, A
Kramer, D
Boles, ST 
Mönig, R
Thompson, CV
Issue Date: 2016
Source: Applied physics letters, 2016, v. 109, no. 7, 71902, p. 071902-1-071902-4
Abstract: The development of large stresses during lithiation and delithiation drives mechanical and chemical degradation processes (cracking and electrolyte decomposition) in thin film silicon anodes that complicate the study of normal electrochemical and mechanical processes. To reduce these effects, lithium phosphorous oxynitride (LiPON) coatings were applied to silicon thin film electrodes. Applying a LiPON coating has two purposes. First, the coating acts as a stable artificial solid electrolyte interphase. Second, it limits mechanical degradation by retaining the electrode's planar morphology during cycling. The development of stress in LiPON-coated electrodes was monitored using substrate curvature measurements. LiPON-coated electrodes displayed highly reproducible cycle-to-cycle behavior, unlike uncoated electrodes which had poorer coulombic efficiency and exhibited a continual loss in stress magnitude with continued cycling due to film fracture. The improved mechanical stability of the coated silicon electrodes allowed for a better investigation of rate effects and variations of mechanical properties during electrochemical cycling.
Publisher: American Institute of Physics
Journal: Applied physics letters 
ISSN: 0003-6951
EISSN: 1077-3118
DOI: 10.1063/1.4961234
Rights: © 2016 Author(s).
This article may be downloaded for personal use only. Any other use requires prior permission of the author and AIP Publishing. This article appeared in A. Al-Obeidi et al., Appl. Phys. Lett. 109, 071902 (2016) and may be found at
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