1. Role of Crystal Symmetry in the Reversibility of Stacking-Sequence Changes in Layered Intercalation Electrodes.
- Author
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Radin, Maxwell D., Alvarado, Judith, Meng, Y. Shirley, and Van der Ven, Anton
- Subjects
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ELECTRODES , *CRYSTALLOGRAPHY , *CRYSTAL symmetry , *LITHIUM-ion batteries , *PHASE transitions - Abstract
The performance of many technologies, such as Li- and Na-ion batteries as well as some two-dimensional (2D) electronics, is dependent upon the reversibility of stacking-sequence-change phase transformations. However, the mechanisms by which such transformations lead to degradation are not well understood. This study explores lattice-invariant shear as a source of irreversibility in stacking-sequence changes, and through an analysis of crystal symmetry shows that common electrode materials (graphitic carbon, layered oxides, and layered sulfides) are generally susceptible to lattice-invariant shear. The resulting irreversible changes to microstructure upon cycling ("electrochemical creep") could contribute to the degradation of the electrode and capacity fade. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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