Journal article
A MEMS platform for in situ, real-time monitoring of electrochemically induced mechanical changes in lithium-ion battery electrodes
Journal of micromechanics and microengineering, v 23(11), pp 114018/1-114018/10
01 Nov 2013
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
We report the first successful demonstration of an optical microelectromechanical systems (MEMS) sensing platform for the in situ characterization of electrochemically induced reversible mechanical changes in lithium-ion battery (LIB) electrodes. The platform consists of an array of flexible membranes with a reflective surface on one side and a thin-film LIB electrode on the other side. The membranes deflect due to the active battery material volume change caused by lithium intercalation (expansion) and extraction (contraction). This deflection is monitored using the Fabry-Perot optical interferometry principle. The active material volume change causes high internal stresses and mechanical degradation of the electrodes. The stress evolution observed in a silicon thin-film electrode incorporated into this MEMS platform follows a 'first elastic, then plastic' deformation scheme. Understanding of the internal stresses in battery electrodes during discharge charge is important for improving the reliability and cycle lifetime of LIBs. The developed MEMS platform presents a new method for in situ diagnostics of thin-film LIB electrodes to aid the development of new materials, optimization of electrode performance, and prevention of battery failure.
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Details
- Title
- A MEMS platform for in situ, real-time monitoring of electrochemically induced mechanical changes in lithium-ion battery electrodes
- Creators
- Ekaterina Pomerantseva - University of Maryland, College ParkHyun Jung - University of Maryland, College ParkMarkus Gnerlich - University of Maryland, College ParkSergio Baron - University of Maryland, College ParkKonstantinos Gerasopoulos - University of Maryland, College ParkReza Ghodssi - Sensors (United States)Energy Frontier Research Centers (EFRC)
- Publication Details
- Journal of micromechanics and microengineering, v 23(11), pp 114018/1-114018/10
- Publisher
- IOP Publishing
- Number of pages
- 10
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000326344500019
- Scopus ID
- 2-s2.0-84887054022
- Other Identifier
- 991020785738904721
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InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Web of Science research areas
- Engineering, Electrical & Electronic
- Instruments & Instrumentation
- Nanoscience & Nanotechnology
- Physics, Applied