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

Rosedhi, Nur Diyana, Idris, Nurul Hayati, Rahman, Md Mokhlesur, Din, M.F. Md and Wang, Jianli 2016, Disordered spinel LiNi0.5Mn1.5O4 cathode with improved rate performance for lithium-ion batteries, Electrochimica acta, vol. 206, pp. 374-380, doi: 10.1016/j.electacta.2016.04.152.

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Title Disordered spinel LiNi0.5Mn1.5O4 cathode with improved rate performance for lithium-ion batteries
Formatted title Disordered spinel LiNi0.5Mn1.5O4 cathode with improved rate performance for lithium-ion batteries
Author(s) Rosedhi, Nur Diyana
Idris, Nurul Hayati
Rahman, Md Mokhlesur
Din, M.F. Md
Wang, Jianli
Journal name Electrochimica acta
Volume number 206
Start page 374
End page 380
Total pages 7
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-07-10
ISSN 0013-4686
Summary 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.
Language eng
DOI 10.1016/j.electacta.2016.04.152
Field of Research 091205 Functional Materials
100708 Nanomaterials
03 Chemical Sciences
09 Engineering
02 Physical Sciences
Socio Economic Objective 850602 Energy Storage (excl. Hydrogen)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier
Persistent URL http://hdl.handle.net/10536/DRO/DU:30084762

Document type: Journal Article
Collection: Institute for Frontier Materials
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