Understanding the ionic transport phenomena in high capacity and high voltage oxides for high-energy-density lithium-ion batteries
EMSL Project ID
48930
Abstract
This project proposes the utilization of high resolution characterization techniques, namely Atom Probe Tomography (APT) and aberration corrected Transmission electron microscopy on high-voltage cathodes to obtain the insights into the cation migration pathways during lithium ion transport across the liquid electrolyte in high-energy-density lithium-ion batteries and to understand the unconventional redox behaviors in oxides and polyanions such as i)voltage fade, and ii) first cycle irreversible capacity loss in oxides. The goal of this work is to take the advantage of the unique capability of APT in conjunction with aberration corrected TEM to perceive the structure, chemical composition, cation occupancy in to submicron level particle, which cannot be detected from bulk materials diagnostic techniques. The systematic investigation on the crystal composition at different state of charge during charge (delithiation), and discharge (lithiation) cycle will unravel the unique redox mechanism(s) that will aid our understanding the undesired phenomena in high-energy-density LIBs. The knowledge will enable us to propose the potential routes to mitigate and/or suppress the unusual redox phenomena in the high-voltage LIB oxides for superior electrochemical performance.
Project Details
Project type
Large-Scale EMSL Research
Start Date
2015-10-01
End Date
2016-09-30
Status
Closed
Released Data Link
Team
Principal Investigator
Related Publications
Mohanty D, B Mazumder, A Devaraj, AS Sefat, A Huq, LA David, EA Payzant, J Li, DL Wood III, and C Daniel. 2017. "Resolving the degradation pathways in high-voltage oxides for high-energy-density lithium-ion batteries; Alternation in chemistry, composition and crystal structures." Nano Energy 36:76-84. doi:10.1016/j.nanoen.2017.04.008