Designing New Lithium-Excess Cathode Materials from Percolation Theory: Nanohighways in Li[subscript x]N[subscript 2–4x/3]Sb[subscript x/3O[subscript 2]
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Increasing lithium content is shown to be a successful strategy for designing new cathode materials. In layered Li[subscript x]N[subscript 2–4x/3]Sb[subscript x/3O[subscript 2] (x = 1.00–1.15), lithium excess improves both discharge capacity and capacity retention at 1C. Structural studies reveal a complex nanostructure pattern of Li–Sb and Ni–Sb ordering where the interface between these domains forms the correct local configuration for good lithium mobility. The <1 nm Li–Sb stripe domains and their interfaces thereby effectively act as nanohighways for lithium diffusion.
Date issued
2014-12Department
Massachusetts Institute of Technology. Department of Materials Science and EngineeringJournal
Nano Letters
Publisher
American Chemical Society (ACS)
Citation
Twu, Nancy, Xin Li, Alexander Urban, Mahalingam Balasubramanian, Jinhyuk Lee, Lei Liu, and Gerbrand Ceder. “ Designing New Lithium-Excess Cathode Materials from Percolation Theory: Nanohighways in Li[subscript x]N[subscript 2–4x/3]Sb[subscript x/3O[subscript 2].” Nano Lett. 15, no. 1 (January 14, 2015): 596–602. © 2014 American Chemical Society
Version: Final published version
ISSN
1530-6984
1530-6992