Reversible lithium-ion insertion in molybdenum oxide nanoparticles

Se Hee Lee, Yong Hyun Kim, Rohit Deshpande, Philip A. Parilla, Erin Whitney, Dane T. Gillaspie, Kim M. Jones, A. Harv Mahan, Shengbai Zhang, Anne C. Dillon

Research output: Contribution to journalArticlepeer-review

339 Scopus Citations

Abstract

A study was conducted to demonstrate the fabrication of anodes from crystalline MoO3 nanoparticles that display both a durable reversible capacity of 630mA h g-1 and durable high rate capability. The nanoparticle anodes show no capacity degradation for 150 cycles between 3.5 to 0.005 V with both charge and discharge at C/2, compared to micrometer-sized particles where the capacity quickly fades. The nanoparticles became highly disordered upon Li-insertion as evidenced by both X-ray diffraction (XRD) and in situ Raman measurements. FPMD calculations show that in spite of a large volume expansion the nanoparticles maintain some structural integrity due to the heavy Mo-framework. The results of the study also show that the large volume expansion allows for fully reversible Li-insertion only at the nanoscale.

Original languageEnglish
Pages (from-to)3627-3632
Number of pages6
JournalAdvanced Materials
Volume20
Issue number19
DOIs
StatePublished - 2008

NREL Publication Number

  • NREL/JA-590-44840

Keywords

  • basic sciences
  • nanomaterials

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