Low-voltage FIB/SEM tomography for 3D microstructure evolution of LiFePO4/C electrode

R. Scipioni, P. S. Jørgensen, D. T. Ngo, S. B. Simonsen, J. Hjelm, P. Norby, S. H. Jensen

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

This work presents an investigation of the degradation mechanisms that occur in LiFePO4/C battery electrodes during charge/discharge cycling. Impedance spectra were measured on a fresh electrode and an electrode aged by cycling. The spectra were modeled with an equivalent circuit which indicates that both the ionic and electronic pathways in the electrode were negatively affected by the cycling. Focused Ion Beam/Scanning Electron Microscopy (FIB/SEM) tomography of both electrodes shows that cycling causes agglomerations of Carbon black (CB). In addition to this, Low-voltage FIB/SEM revealed non-conductive CB in the aged electrode.

Original languageEnglish
Title of host publicationJoint General Session
Subtitle of host publicationBatteries and Energy Storage -and- Fuel Cells, Electrolytes, and Energy Conversion
EditorsM. Manivannan, D. Wang, K. M. Abraham, S. R. Narayanan, B. Y. Liaw
PublisherElectrochemical Society
Pages71-80
Number of pages10
Volume69
Edition18
ISBN (Electronic)9781607685395
DOIs
Publication statusPublished - 1 Jan 2015
EventSymposium on Joint General Session: Batteries and Energy Storage -and- Fuel Cells, Electrolytes, and Energy Conversion - 228th ECS Meeting - Phoenix, United States
Duration: 11 Oct 201515 Oct 2015

Conference

ConferenceSymposium on Joint General Session: Batteries and Energy Storage -and- Fuel Cells, Electrolytes, and Energy Conversion - 228th ECS Meeting
Country/TerritoryUnited States
CityPhoenix
Period11/10/1515/10/15

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