AI Article Synopsis
- The text discusses a new technique called pascalammetry that helps understand ion transport in solid-state electrochemical devices by applying stress and measuring current responses.
- This method has been tested on specific microbattery models, revealing that stress can influence lithium diffusion, which may lead to battery degradation.
- The findings suggest that pascalammetry could be a valuable tool for detecting stress in solid-state batteries and other electrochemical systems, providing insights that go beyond traditional methods.
Article Abstract
Energy storage science calls for techniques to elucidate ion transport over a range of conditions and scales. We introduce a new technique, pascalammetry, in which stress is applied to a solid-state electrochemical device and induced faradaic current transients are measured and analyzed. Stress-step pascalammetry measurements are performed on operando microbattery probes (LiO/Li/W) and Si cathodes, revealing stress-assisted Li diffusion. We show how non-Cottrellian lithium diffusional kinetics indicates stress, a prelude to battery degradation. An analytical solution to a diffusion/activation equation describes this stress signature, with spatiotemporal characteristics distinct from Cottrell's classic solution for unstressed systems. These findings create an unprecedented opportunity for quantitative detection of stress in solid-state batteries through the current signature. Generally, pascalammetry offers a powerful new approach to study stress-related phenomena in any solid-state electrochemical system.
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| http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5993470 | PMC |
| http://dx.doi.org/10.1126/sciadv.aas8927 | DOI Listing |
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Article Synopsis
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