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Role of Crystal Symmetry in the Reversibility of Stacking-Sequence Changes in Layered Intercalation Electrodes
Nano Letters ( IF 9.6 ) Pub Date : 2017-11-09 00:00:00 , DOI: 10.1021/acs.nanolett.7b03989 Maxwell D. Radin 1 , Judith Alvarado , Y. Shirley Meng , Anton Van der Ven 1
Nano Letters ( IF 9.6 ) Pub Date : 2017-11-09 00:00:00 , DOI: 10.1021/acs.nanolett.7b03989 Maxwell D. Radin 1 , Judith Alvarado , Y. Shirley Meng , Anton Van der Ven 1
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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.
中文翻译：
晶体对称性在分层插层电极中堆叠序列变化的可逆性中的作用
诸如锂离子电池和钠离子电池以及某些二维（2D）电子设备之类的许多技术的性能取决于堆叠顺序变化相变的可逆性。但是，这种转化导致降解的机理尚不十分清楚。这项研究探索了晶格不变剪切作为堆叠顺序变化不可逆性的根源，并且通过晶体对称性分析显示普通电极材料（石墨碳，层状氧化物和层状硫化物）通常易受晶格不变剪切的影响。循环后所产生的不可逆的微观结构变化（“电化学蠕变”）可能会导致电极性能下降和容量衰减。
更新日期：2017-11-09
中文翻译：
晶体对称性在分层插层电极中堆叠序列变化的可逆性中的作用
诸如锂离子电池和钠离子电池以及某些二维（2D）电子设备之类的许多技术的性能取决于堆叠顺序变化相变的可逆性。但是，这种转化导致降解的机理尚不十分清楚。这项研究探索了晶格不变剪切作为堆叠顺序变化不可逆性的根源，并且通过晶体对称性分析显示普通电极材料（石墨碳，层状氧化物和层状硫化物）通常易受晶格不变剪切的影响。循环后所产生的不可逆的微观结构变化（“电化学蠕变”）可能会导致电极性能下降和容量衰减。
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