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High-Voltage Pyrophosphate Cathode: Insights into Local Structure and Lithium-Diffusion Pathways

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  • This work was supported by the EPSRC Supergen Energy Storage Consortium and Hector/MCC supercomputer resources. We thank G. Gardiner and C. Eames for useful discussions.

Abstract

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Ion-transport paths: Combined modeling and neutron diffraction studies provide atomic-scale insights into Li2FeP2O7, a material proposed for a new lithium-battery cathode with reversible electrode operation at the highest voltage of all known Fe-based phosphates. The results indicate that Li+ ions are transported rapidly through a 2D network along the paths shown in green in the picture.

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