Enhanced rate performance of LiNi0.5Mn1.5O4 fibers synthesized by electrospinning

Rui Xu, Xiaofeng Zhang, Rita Chamoun, Jianglan Shui, James C.M. Li, Jun Lu, Khalil Amine, Ilias Belharouak

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

Spinel LiNi0.5Mn1.5O4 (LNMO) provides a high working potential as a cathode material for lithium-ion batteries. Yet there is a phase transition from cubic to tetragonal structure in LNMO during the ~3V charge/discharge region. To suppress the large volume change and capacity fade inherent with bulk-sized LNMO particles when discharged to below 3.0V, one-dimensional nano-structured LNMO was prepared by an electrospinning method and a subsequent heat treatment. The well-separated nanofiber precursors combat the growth and aggregation of LNMO particles during the heating procedure and lead to improved capacity, better cycling stability, and improved rate capability of the final LMNO nanofibers. The as-prepared LMNO nanofibers have a diameter as thin as 50-100nm, which is the thinnest of this kind of complex compounds that contain multi-transition metal elements produced through the electrospinning method. In coin cell tests of this material at a current density of 27mAg-1, the initial discharge capacity was 130mAhg-1 over a voltage range of 3.5-4.8V and 300mAhg-1 over a voltage range of 2.0-4.8V.

Original languageEnglish
Pages (from-to)616-624
Number of pages9
JournalNano Energy
Volume15
DOIs
StatePublished - Jul 1 2015
Externally publishedYes

Funding

This research was funded by the U.S. Department of Energy , Freedom CAR, and Vehicle Technologies Office. The electron microscopy was accomplished at the Electron Microscopy Center for Materials Research at the Argonne National Laboratory, a U.S. Department of Energy Office of Science Laboratory operated under Contract no. DE-AC02-06CH11357 by UChicago Argonne, LLC.

FundersFunder number
Freedom CAR
U.S. Department of EnergyDE-AC02-06CH11357
Argonne National Laboratory

    Keywords

    • Cathode
    • Electrospinning
    • High voltage spinel
    • Lithium-ion battery
    • Nanofiber

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