Evolution of the lithium morphology from cycling of thin film solid state batteries

Thin film batteries with a Lipon electrolyte and Li metal anode can be cycled thousands of times. During this time there is a gradual redistribution of the lithium at the top surface; the morphology that develops depends on a number of factors but is largely driven by dewetting. In this work, this r...

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Bibliographic Details
Published in:	Journal of electroceramics 2017-06, Vol.38 (2-4), p.222-229
Main Author:	Dudney, Nancy J.
Format:	Article
Language:	eng
Subjects:	Batteries Cathodic coating (process) Cathodic protection Ceramics Characterization and Evaluation of Materials Chemistry and Materials Science Composites Crystallography and Scattering Methods Diffusion effects Drying Electrochemistry ENERGY STORAGE Glass Lipon electrolyte Lithium Lithium batteries Lithium battery Materials Science Morphology Natural Materials Optical and Electronic Materials Protective coatings Solid state Surface energy Thin film battery Thin films
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Summary:	Thin film batteries with a Lipon electrolyte and Li metal anode can be cycled thousands of times. During this time there is a gradual redistribution of the lithium at the top surface; the morphology that develops depends on a number of factors but is largely driven by dewetting. In this work, this redistribution is characterized as functions of the cycle number, duty cycle, cathode composition, and protective coating over the lithium. Observations of wrinkled and pitted surfaces are discussed considering the effects of defects and diffusion in the lithium and influences of film stresses and surface energy. Similar processes may impact solid state lithium batteries with higher energy per active area.
ISSN:	1385-3449 1573-8663