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Disordered spinel LiNi0.5Mn1.5O4 cathode with improved rate performance for lithium-ion batteries

Journal Article


Abstract


  • The high voltage LiNi0.5Mn1.5O4 cathode with a disordered spinel structure is synthesized by a glycine-assisted low-temperature reaction follows by a thermal treatment at 750 °C, 850 °C, and 950 °C for 12 h. Glycine is used as a chelating agent for the first time to build required environment for shaping the precursor of LiNi0.5Mn1.5O4 materials. The microstructure and morphology of the LiNi0.5Mn1.5O4 product are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller, and transmission electron microscopy. The sample prepares at 750 °C reveals small particles with well-defined crystals as confirmed by electron microscopy. Electrochemical results demonstrate that LiNi0.5Mn1.5O4 electrode anneal at 750 °C (compare to other two samples) delivers the highest reversible capacity of 110 mAh g-1 at 0.2C after 100 cycles with good rate capability. The enhanced electrochemical performance could be attributed to the smaller particle sizes as well as well-defined crystals which provide a directional and shorter diffusion path length for Li+ transportation within the crystals.

Authors


  •   Rosedhi, Nur Diyana (external author)
  •   Idris, Nurul (external author)
  •   Rahman, Md. Mokhlesur (external author)
  •   Din, M. F Md (external author)
  •   Wang, Jian Li.

Publication Date


  • 2016

Citation


  • Rosedhi, N., Idris, N., Rahman, M., Din, M. & Wang, J. (2016). Disordered spinel LiNi0.5Mn1.5O4 cathode with improved rate performance for lithium-ion batteries. Electrochimica Acta, 206 374-380.

Scopus Eid


  • 2-s2.0-84968764137

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2047

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 374

End Page


  • 380

Volume


  • 206

Place Of Publication


  • United Kingdom

Abstract


  • The high voltage LiNi0.5Mn1.5O4 cathode with a disordered spinel structure is synthesized by a glycine-assisted low-temperature reaction follows by a thermal treatment at 750 °C, 850 °C, and 950 °C for 12 h. Glycine is used as a chelating agent for the first time to build required environment for shaping the precursor of LiNi0.5Mn1.5O4 materials. The microstructure and morphology of the LiNi0.5Mn1.5O4 product are characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, Brunauer-Emmett-Teller, and transmission electron microscopy. The sample prepares at 750 °C reveals small particles with well-defined crystals as confirmed by electron microscopy. Electrochemical results demonstrate that LiNi0.5Mn1.5O4 electrode anneal at 750 °C (compare to other two samples) delivers the highest reversible capacity of 110 mAh g-1 at 0.2C after 100 cycles with good rate capability. The enhanced electrochemical performance could be attributed to the smaller particle sizes as well as well-defined crystals which provide a directional and shorter diffusion path length for Li+ transportation within the crystals.

Authors


  •   Rosedhi, Nur Diyana (external author)
  •   Idris, Nurul (external author)
  •   Rahman, Md. Mokhlesur (external author)
  •   Din, M. F Md (external author)
  •   Wang, Jian Li.

Publication Date


  • 2016

Citation


  • Rosedhi, N., Idris, N., Rahman, M., Din, M. & Wang, J. (2016). Disordered spinel LiNi0.5Mn1.5O4 cathode with improved rate performance for lithium-ion batteries. Electrochimica Acta, 206 374-380.

Scopus Eid


  • 2-s2.0-84968764137

Ro Metadata Url


  • http://ro.uow.edu.au/aiimpapers/2047

Has Global Citation Frequency


Number Of Pages


  • 6

Start Page


  • 374

End Page


  • 380

Volume


  • 206

Place Of Publication


  • United Kingdom