Designing New Lithium-Excess Cathode Materials from Percolation Theory: Nanohighways in LixNi2–4x/3Sbx/3O2
Nano Letters2014Vol. 15(1), pp. 596–602
Citations Over TimeTop 10% of 2014 papers
Nancy Twu, Xin Li, Alexander Urban, Mahalingam Balasubramanian, Jinhyuk Lee, Lei Liu, Gerbrand Ceder
Abstract
Increasing lithium content is shown to be a successful strategy for designing new cathode materials. In layered Li(x)Ni(2-4x/3)Sb(x/3)O2 (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.
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