| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
2021 Technical Division Student Poster Contest
|
| Presentation Title |
Degradation Characterization in Low Cobalt Lithium-ion Intercalation Cathodes |
| Author(s) |
Hernando Gonzalez Malabe, Austin Gabhart, Megan Flannagin, Alex L'Antigua, George J Nelson |
| On-Site Speaker (Planned) |
Hernando Gonzalez Malabe |
| Abstract Scope |
Higher capacity layered transition metal oxide cathode materials for lithium-ion batteries (LIB) are being pursued to improve overall LIB capacity.
The present work seeks to connect morphological and chemical changes within the cathode microstructure to charge cut-off voltage, electrode composition, and operating temperature to better describe degradation behavior in low cobalt intercalation cathodes. To correlate these factors with the electrode degradation a combined ex-situ and in operando characterization approach is being pursued. Here, results are presented from cyclic voltammetry (CV), ex-situ characterization by X-ray diffraction (XRD), and scanning electron microscopy (SEM).
Current results show an acceleration of the degradation process at higher voltage, as demonstrated by significant capacity loss and peak shifts in CV data indicating altered electrochemical activity. Evidence of additional phase formation is observed in XRD of cycled batteries, with the corresponding breakdown of active material particles seen with SEM imaging. |
| Proceedings Inclusion? |
Undecided |
| Keywords |
Energy Conversion and Storage, Characterization, Copper / Nickel / Cobalt |