Jump to main content
Jump to site search

Issue 9, 2016
Previous Article Next Article

Trace level doping of lithium-rich cathode materials

Author affiliations

Abstract

Lithium ion batteries have revolutionized portable electronics and have the potential to electrify the transportation sector. Lithium-rich cathode materials with the composition xLi2MnO3·(1−x)Li(Ni1/3Mn1/3Co1/3)O2 have received considerable attention as candidates for Plug-in Hybrid Electric Vehicles (PHEVs) and Electric Vehicles (EVs). Cathodes made from these materials display high capacity (>200 mAhg−1) and good cycling stability, offering twice the energy density of currently available intercalation materials. Unfortunately, their performance is plagued by voltage fade due to a layered-spinel phase transformation. Herein, using spray pyrolysis, we show that certain inexpensive trace level (≤1%) dopants can help in mitigating voltage fade, when the material is cycled between 2.0–4.6 V. The dopants lead to greater capacity loss than what would be expected from a capacity that is strictly based on a change in the transitional-metal oxidation state. The results imply that a portion of the capacity of these materials comes from reversible oxygen chemistry. These findings could put a different perspective on fade mechanism prevention.

Graphical abstract: Trace level doping of lithium-rich cathode materials

Back to tab navigation

Supplementary files

Publication details

The article was received on 28 Sep 2015, accepted on 15 Jan 2016 and first published on 27 Jan 2016


Article type: Paper
DOI: 10.1039/C5TA07764H
Citation: J. Mater. Chem. A, 2016,4, 3538-3545
  •   Request permissions

    Trace level doping of lithium-rich cathode materials

    M. Lengyel, K. Shen, D. M. Lanigan, J. M. Martin, X. Zhang and R. L. Axelbaum, J. Mater. Chem. A, 2016, 4, 3538
    DOI: 10.1039/C5TA07764H

Search articles by author

Spotlight

Advertisements