Third Day Poster Session, 17 June 2010 - NanoTR-VI

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Poster Session, Thursday, June 17
Theme F686 - N1123
Hydrothermal Synthesis of LiMnR2ROR4R Cathode Active Nanoparticles for Li-ion Batteries
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UEmrah BulutUP P* and Mahmut OzacarP
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PDepartment of Chemistry, Art and Science Faculty, Sakarya University, Sakarya 54187, Turkiye
Abstract- Spinel LiMnR2ROR4R cathode active nanoparticles for li-ion batteries were synthesized by hydrothermal route at low temperatures. The
LiMnR2ROR4R nanoparticles synthesized via hydrothermal technique were investigated by X-ray diffraction (XRD) and scanning electron microscopy
Lithium-ion batteries are nowadays widely used for
portable systems, such as telephones, computers and
telecommunication devices. One of the most studied
materials in this field is spinel lithium manganese oxide
(LiMnR2ROR4R), which is considered as a promising alternative
to LiCoOR2R, currently used in the lithium-ion batteries.
LiMnR2ROR4R is a cubic spine1 with space group symmetry
Fd3m. The lithium ions are located on the 8a tetrahedral sites
of the structure; the manganese ions are positioned on the
16d octahedral sites. The oxygen ions, which are cubicclose-packed
(ccp) occupy the 32e positions.
Figure 2. SEM images of LiMnR2ROR4R cathode active nanoparticles
Figure 1. Tunnel structure of spinel LiMnR2ROR4R
Moreover, spinel LiMnR2ROR4R has attracted much interest in
the last decade because it presents a phase transition around
room temperature attributed to a charge ordering process [1].
LiMnR2ROR4R has received much attention as a cathode material
because of the high voltage required for lithium insertion and
its lower price, availability and better compliance with
environment compared to LiCoOR2R and LiNiOR2R [2-4]. In
recent years, nanostructures have received intensive attention
because of both their fundamental importance and the wide
range of their potential applications in many areas. Most of
the nanostructured electrode materials are synthesized by the
low-temperature treatment processes such as soft chemical
[5], sol-gel [6] and hydrothermal methods [7]. The
hydrothermal synthesis can control the particle size and the
crystalline nature of the product.
Here we synthesized LiMnR2ROR4R cathode active
nanoparticles. We have chosen the spinel LiMn R2ROR4R because
it is the most promising cathode material based on low cost,
large deposits, and nontoxicity. LiMnR2ROR4R nanoparticles
obtained via hydrothermal synthesis were between 100 and
180 nm in range.
Figure 3. XRD pattern of spinel LiMnR2ROR4R cathode active
nanoparticles
*Corresponding author : HTebulut@sakarya.edu.trT
[1] J. Rodriguez-Carvajal, G. Rousse, C. Masquelier, M. Hervieu,
Phys. Rev. Lett. 81, 4660, (1998).
[2] M. M., Thackeray, P. J., Johnson, L. A., Depicciotto, P. G.,
Bruce, J. B., Goodenough, Mater. Res. Bull. 19, 179, (1984).
[3] Thackeray, M. M.; Dekock, A. J. Solid State Chem. 74, 414,
(1988).
[4] Jayalakshmi, M.; Mohan Rao, M.; Scholz, F. Langmuir, 19,
8403, (2003)
[5] J. Luo, Y. Wang, H. Xiong, Y. Xia, Chem. Mater., 19, 4791,
(2007).
[6] Y. K., Sun, Ind. Eng. Chem. Res., 36, 4839, (1997).
[7] H. J., Yuea, X. K., Huanga, D. P., Lva, Y. Yanga,
Electrochimica Acta 54, 5363, (2009).
6th Nanoscience and Nanotechnology Conference, zmir, 2010 755