Impact of Li2O/Metal Mole Ratio on Lithium-ion Battery Anode Performance

Kunduraci M., Ghobadi T. G. U., YILMAZ E.

INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE, vol.13, no.6, pp.5630-5644, 2018 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 13 Issue: 6
  • Publication Date: 2018
  • Doi Number: 10.20964/2018.06.16
  • Journal Name: INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.5630-5644
  • Keywords: lithium battery, conversion anode, composite, LINI1/3CO1/3MN1/3O2 CATHODE MATERIAL, FABRICATION, STABILITY, COMPOSITE, ELECTRODE, NICO2O4, MN3O4, FILMS, MN2O3, OXIDE
  • Ankara University Affiliated: No

Abstract

In this study the electrochemical impact of Li2O/metal mole ratio on the cycle life of lithium-ion battery anode materials is demonstrated. For this purpose, nanostructured layered LiNi1/3Mn1/3CO1/3O2 (LiNMC) and spinel LiMn1.5Ni0.5O4 (LiMNO) materials, traditionally known as cathode materials, are evaluated as anode materials and compared against their lithium-free versions NMC (Ni:Mn:Co=1:1:1) and MNO (Mn:Ni=3:1). The Li2O/metal ratio in fully lithiated states are 2.0 for lithium containing (LiNMC and LiMNO) and 1.3 for lithium-free (NMC and MNO) samples. Battery tests show that capacity fading of lithium containing samples is 3 to 4 times larger than lithium-free samples. The differences in the electronic conductivities and voltages profiles of lithium containing and lithium-free anode materials are suggested to be the origin of such electrochemical disparity.