Next Article in Journal
Tailorable Burning Behavior of Ti14 Alloy by Controlling Semi-Solid Forging Temperature
Previous Article in Journal
Fatigue Property of Open-Hole Steel Plates Influenced by Bolted Clamp-up and Hole Fabrication Methods
Previous Article in Special Issue
Nano-Crystalline Li1.2Mn0.6Ni0.2O2 Prepared via Amorphous Complex Precursor and Its Electrochemical Performances as Cathode Material for Lithium-Ion Batteries
Article Menu
Issue 8 (August) cover image

Export Article

Open AccessArticle
Materials 2016, 9(8), 696; doi:10.3390/ma9080696

Nature of the Electrochemical Properties of Sulphur Substituted LiMn2O4 Spinel Cathode Material Studied by Electrochemical Impedance Spectroscopy

Faculty of Chemistry, Jagiellonian University, Ingardena 3, Krakow 30-060, Poland
*
Authors to whom correspondence should be addressed.
Academic Editor: Martin Wilkening
Received: 14 June 2016 / Revised: 29 July 2016 / Accepted: 9 August 2016 / Published: 16 August 2016
View Full-Text   |   Download PDF [2757 KB, uploaded 16 August 2016]   |  

Abstract

In this work, nanostructured LiMn2O4 (LMO) and LiMn2O3.99S0.01 (LMOS1) spinel cathode materials were comprehensively investigated in terms of electrochemical properties. For this purpose, electrochemical impedance spectroscopy (EIS) measurements as a function of state of charge (SOC) were conducted on a representative charge and discharge cycle. The changes in the electrochemical performance of the stoichiometric and sulphur-substituted lithium manganese oxide spinels were examined, and suggested explanations for the observed dependencies were given. A strong influence of sulphur introduction into the spinel structure on the chemical stability and electrochemical characteristic was observed. It was demonstrated that the significant improvement in coulombic efficiency and capacity retention of lithium cell with LMOS1 active material arises from a more stable solid electrolyte interphase (SEI) layer. Based on EIS studies, the Li ion diffusion coefficients in the cathodes were estimated, and the influence of sulphur on Li+ diffusivity in the spinel structure was established. The obtained results support the assumption that sulphur substitution is an effective way to promote chemical stability and the electrochemical performance of LiMn2O4 cathode material. View Full-Text
Keywords: Li-ion battery; cathode material; LiMn2O4 spinel; sulphur substitution; electrochemical properties Li-ion battery; cathode material; LiMn2O4 spinel; sulphur substitution; electrochemical properties
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Bakierska, M.; Świętosławski, M.; Dziembaj, R.; Molenda, M. Nature of the Electrochemical Properties of Sulphur Substituted LiMn2O4 Spinel Cathode Material Studied by Electrochemical Impedance Spectroscopy. Materials 2016, 9, 696.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Materials EISSN 1996-1944 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top