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Enhanced electrochemical performance of Li-rich cathode materials through microstructural control. | LitMetric

Enhanced electrochemical performance of Li-rich cathode materials through microstructural control.

Phys Chem Chem Phys

CIC energiGUNE, Parque Tecnológico de Álava, C/Albert Einstein 48, 01510 Miñano, Álava, Spain.

Published: September 2018

AI Article Synopsis

Article Abstract

The microstructural complexity of Li-rich cathode materials has so far hampered understanding the critical link between size, morphology and structural defects with both capacity and voltage fadings that this family of materials exhibits. Li2MnO3 is used here as a model material to extract reliable structure-property relationships that can be further exploited for the development of high-performing and long-lasting Li-rich oxides. A series of samples with microstructural variability have been prepared and thoroughly characterized using the FAULTS software, which allows quantification of planar defects and extraction of average crystallite sizes. Together with transmission electron microscopy (TEM) and density functional theory (DFT) results, the successful application of FAULTS analysis to Li2MnO3 has allowed rationalizing the synthesis conditions and identifying the individual impact of concurrent microstructural features on both voltage and capacity fadings, a necessary step for the development of high-capacity Li-ion cathode materials with enhanced cycle life.

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Source
http://dx.doi.org/10.1039/c8cp04181dDOI Listing

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