Journal
ELECTROCHIMICA ACTA
Volume 206, Issue -, Pages 374-380Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2016.04.152
Keywords
LiNi0.5Mn1.5O4; lithium-ion batteries; cathode materials; glycine
Categories
Funding
- Ministry of Higher Education, Malaysia through a Fundamental Research Grant Scheme (FRGS) [59323]
- MyBrain15 scholarship
Ask authors/readers for more resources
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 degrees C, 850 degrees C, and 950 degrees 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 degrees C reveals small particles with well-defined crystals as confirmed by electron microscopy. Electrochemical results demonstrate that LiNi0.5Mn1.5O4 electrode anneal at 750 degrees 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. (c) 2016 Elsevier Ltd. All rights reserved.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available