This work is focused on analysis of the influence of cerium dioxide (CeO₂) on electrochemical performance of lithium manganese oxide (LiMn₂O₄, LMO). Firstly, pure stoichiometric nanopowder of LiMn₂O₄ was prepared by modified sol-gel method using lithium and manganese salts. Secondly, the low temperature method (LTM) was used to modify the grain surface of pristine lithium manganese oxide powder. The LMO/n-CeO₂ powders were analyzed by: XRD, Raman spectroscopy, SEM, TEM. The galvanostatic charge/discharge tests of the pristine and CeO₂ modified LiMn₂O₄ cathode materials were conducted in the potential range: 3.5 to 4.5 V vs. Li/Li⁺ at room temperature. High current rates performance has been evaluated by determination of specific discharge capacity at current rates varied from 1 C to 30 C. Our work demonstrates that surface modification of LMO grains’ by using 1%wt. of CeO₂ admixture improves cycling stability and capacity retention. Pristine LMO reveals 10% capacity loss after 100 cycles when discharged at 1C, while the sample modified with 1%wt. CeO₂ grains retains ca. 98% of its initial discharge capacity after 100 cycles.

Acknowledgments

This work was supported by The National Centre for Research and Development through the research grant PBS1 (contract no. PBS1/A1/4/2012).

References

1. Monika Michalska, Bartosz Hamankiewicz, Dominika Ziółkowska, Michał Krajewski, Ludwika Lipińska, Mariusz Andrzejczuk, Andrzej Czerwiński, Influence of LiMn₂O₄ modification with CeO₂ on electrode performance, Electrochimica Acta 136 (2014) 286-291.

2. B. Hamankiewicz, M. Michalska, M. Krajewski, D. Ziolkowska, L. Lipińska, M. Kamińska, A. Czerwinski, The effect of electrode thickness on electrochemical performance of LiMn₂O₄ cathode synthesized by modified sol-gel method, Solid State Ionics 262 (2014) 9-13.

• Legal notice:
  

  Copyright (c) Pielaszek Research, all rights reserved.
  The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
  In every case, proper references including Author(s) name(s) and URL of this webpage: https://science24.com/paper/31244 must be provided.

1. Kinetic studies of 4-chlorophenol adsorption on the reduced graphene oxides  
2. Experimental evaluation of melting point depression in AlSi/AlN nanomultilayer system
3. Novel synthesis of olivine lithium metal phosphates LiMPO₄ (M = Fe, Mn, Ni, Co) - analysis and studies.
4. LiMn₂O₄/graphene oxide as a cathode material for lithium ion battery
5. Li₄Ti₅O₁₂/CNT as an anode material for LiBs - structural, morphological and electrochemical studies
6. From the mine to the tops: Graphene oxide – the mysterious derivative of flake graphene. Properties and applications
7. Synthesis of nano-Li₄Ti₅O₁₂ decorated by silver nanoparticles as an anode material for lithium ion batteries
8. Structural and electrochemical studies on LiMn₂O₄ cathode material for LIBs coated with ceramic oxides
9. Safe nanomaterials of spinel structure for lithium-ion secondary batteries 
10. Electronic structure of nanocrystals YF_3­­: RE
11. Electronic structure of nanocrystals YF_3­­: RE
12. NANONET Foundation
13. Synthesis and studies on LiMn₂O₄/Carbon nanocomposites as a cathode materials for lithium ion batteries
14. NANONET Foundation
15. Materials for lithium ion batteries
16. Fundacja Wspierania Nanonauk i Nanotechnologii NANONET
17. Możliwości badawcze Laboratorium Skaningowej Mikroskopii Elektronowej na WIM PW
18. Prezentacja Fundacji NANONET
19. Microstructural and mechanical characterization of zirconia based composite
20. Nanomaterials in dental applications
21. Synthesis by sol-gel method of nanocrystalline compounds within Y₂O₃(Nd₂O₃)–Al₂O₃ system for optical applications
22. Growth and characterization of Nd, Yb – Yttrium oxide nanopowders obtained by sol-gel method
23. On the solubility of Nd³⁺ in Y₃Al₅O₁₂
24. Structural stability of zirconia ceramic in water and acid solutions
25. Some electrochemical properties of laccase immobilised on the Au, IrO_x, or C₆₀-Pd polymer electrode supports