About this Abstract |
Meeting |
MS&T22: Materials Science & Technology
|
Symposium
|
2022 Undergraduate Student Poster Contest
|
Presentation Title |
Characterization of LiNi1/3Mn1/3Co1/3O2 Solid Oxide Cathodes through In-operando X-ray Diffractionn |
Author(s) |
Matthew Frame |
On-Site Speaker (Planned) |
Matthew Frame |
Abstract Scope |
Electrochemical and structural properties of lithium nickel manganese cobalt oxide (NMC) cathode materials were investigated through galvanostatic cycling and in-operando x-ray diffraction. The conductivity & degree of surficial cracking were investigated to optimize the cell performance. Conductivity was varied through composition, and a 30% reduction in battery capacity was observed in the (96/2/2) composition of NMC/C conductive/PVDF binder additive. Variations in surficial cracking did not show a strong correlation with battery performance. Coin cells with an 80/10/10 composition were constructed with minimal surficial cracking for in-operando XRD. XRD was conducted with an Ag anode between 2theta = 5 and 2theta = 25, and a minute shift in the d-spacing of the 101 plane was observed before cell failure. Cell failure at 4V charge was due to a loss in stack pressure, and future work would benefit from stiffer x-ray transparent windows, and from a transmission geometry. |