Designing new lithium-excess cathode materials from percolation theory: Nanohighways in LixNi2-4 x /3Sbx/3O2

Nancy Twu, Xin Li, Alexander Urban, Mahalingam Balasubramanian, Jinhyuk Lee, Lei Liu, Gerbrand Ceder*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

41 Citations (Scopus)

Abstract

Increasing lithium content is shown to be a successful strategy for designing new cathode materials. In layered LixNi2-4x/3Sbx/3O2 (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.

Original languageEnglish
Pages (from-to)596-602
Number of pages7
JournalNano Letters
Volume15
Issue number1
DOIs
Publication statusPublished - 14 Jan 2015

Keywords

  • Cathode
  • lithium-excess
  • nano
  • percolation

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