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Title: In-situ, Real-Time Monitoring of Mechanical and Chemical Structure Changes in a V2O5 Battery Electrode Using a MEMS Optical Sensor

This work presents the first demonstration of a MEMS optical sensor for in-situ, real-time monitoring of both mechanical and chemical structure evolutions in a V2O5 lithium-ion battery (LIB) cathode during battery operation. A reflective membrane forms one side of a Fabry-Perot (FP) interferometer, while the other side is coated with V2O5 and exposed to electrolyte in a half-cell LIB. Using one microscope and two laser sources, both the induced membrane deflection and the corresponding Raman intensity changes are observed during lithium cycling. Results are in good agreement with the expected mechanical behavior and disorder change of the V2O5 layers, highlighting the significant potential of MEMS as enabling tools for advanced scientific investigations.
 [1] ;  [1] ;  [1] ;  [2] ;  [1]
  1. University of Maryland
  2. Sandia National Laboratories
Publication Date:
OSTI Identifier:
Resource Type:
Resource Relation:
Journal Name: Technical Digest; Journal Volume: 2014; Conference: Hilton Head Workshop 2014: A Solid-State Sensors, Actuators and Microsystems Workshop, June 8 - 12, Hilton Head Island, South Carolina
Research Org:
Energy Frontier Research Centers
Sponsoring Org:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Contributing Orgs:
University of Maryland; Sandia National Laboratories
Country of Publication:
United States
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY; CATHODES; MEMS; SENSORS; Battery capacity; Electrochemical reations; Lithium-Ion Battery (LIB); Cathodes; sensors