Comparing the behavior of nano-and microsized particles of LiMn1. 5Ni0. 5O4 spinel as cathode materials for Li-ion batteries

Yosef Talyosef, B. Markovsky, Ronit Lavi, G. Salitra, D. Aurbach, Daniela Kovacheva, Mila Gorova, Ekaterina Zhecheva, Radostina Stoyanova

Research output: Contribution to journalArticlepeer-review

Abstract

We report on a rigorous comparative study of nano- and microparticles of LiMn1.5Ni0.5O4LiMn1.5Ni0.5O4 spinel as cathode materials for Li-ion batteries. The stability of these materials in LiPF6LiPF6 /alkyl carbonate solutions in temperatures up to 70°C70°C was explored. Capacity, cycling, rate capabilities, and impedance behavior were also studied. The methods included X-ray diffraction, Raman, X-ray photelectron, Fourier transform infrared, and electron paramagnetic resonance spectroscopies, and electron microscopy, in conjunction with standard electrochemical techniques: voltammetry, chronopotentiometry, and impedance spectroscopy. These materials show an impressive stability in solutions at elevated temperature. The use of nanomaterials was advantageous for obtaining a better rate capability of LiMn1.5Ni0.5O4LiMn1.5Ni0.5O4 electrodes. LiMn1.5Ni0.5O4LiMn1.5Ni0.5O4 particles develop a unique surface chemistry in solutions that passivates and protects them from detrimental interactions with solution species at elevated temperatures.
Original languageAmerican English
Pages (from-to)682-691
JournalJournal of the Electrochemical Society
Volume154
Issue number7
StatePublished - 2007

Fingerprint

Dive into the research topics of 'Comparing the behavior of nano-and microsized particles of LiMn1. 5Ni0. 5O4 spinel as cathode materials for Li-ion batteries'. Together they form a unique fingerprint.

Cite this