TY - JOUR
T1 - Preparation of lithium manganese oxide fine particles by spray pyrolysis and their electrochemical properties
AU - Iriyama, Y.
AU - Tachibana, Y.
AU - Sasasoka, R.
AU - Kuwata, N.
AU - Abe, T.
AU - Inaba, M.
AU - Tasaka, A.
AU - Kikuchi, K.
AU - Kawamura, J.
AU - Ogumi, Z.
N1 - Funding Information:
This work was supported by the Ministry of Education, Science, Sports and Culture, Grant-in-Aid for Scientific Research on Priority Areas, 439, 2004. This work was partially supported by New Energy and Industrial Technology Development Organization (NEDO) of Japan, and also by a Grant-in-Aid for 21st COE program-COE for a United Approach to New Materials Science from the Ministry of Education, Culture, Sports, Science, and Technology.
PY - 2007/12/6
Y1 - 2007/12/6
N2 - Highly crystalline nano-sized lithium manganese oxide particles were fabricated by spray pyrolysis. The resultant particles had well-developed facet planes in a transmission electron microscopy (TEM) image and electron diffraction pattern from a single particle also showed clear diffraction spots, indicating that the prepared particles were highly crystalline. The mean crystallite size estimated from X-ray diffraction peaks was ca. 18 nm, which was in good agreement with the diameter of the particles observed in the TEM image. These particles were gathered on platinum mesh and their electrochemical properties were investigated. The mean crystallite size increased with an increase in annealing temperature, which influenced the electrochemical lithium insertion/extraction properties of the particles. In particular, samples annealed at 773 K showed different kinds of lithium extraction/insertion properties in the cyclic voltammogram (CV), and only a couple of broad redox peaks were observed at around 0.8 V (versus Ag/AgCl) between 0.4 and 1.0 V. It is suggested that lithium distribute randomly in the sample annealed at 773 K sample due to the effects of grain boundaries, which resulted in different kinds of phase transition reactions.
AB - Highly crystalline nano-sized lithium manganese oxide particles were fabricated by spray pyrolysis. The resultant particles had well-developed facet planes in a transmission electron microscopy (TEM) image and electron diffraction pattern from a single particle also showed clear diffraction spots, indicating that the prepared particles were highly crystalline. The mean crystallite size estimated from X-ray diffraction peaks was ca. 18 nm, which was in good agreement with the diameter of the particles observed in the TEM image. These particles were gathered on platinum mesh and their electrochemical properties were investigated. The mean crystallite size increased with an increase in annealing temperature, which influenced the electrochemical lithium insertion/extraction properties of the particles. In particular, samples annealed at 773 K showed different kinds of lithium extraction/insertion properties in the cyclic voltammogram (CV), and only a couple of broad redox peaks were observed at around 0.8 V (versus Ag/AgCl) between 0.4 and 1.0 V. It is suggested that lithium distribute randomly in the sample annealed at 773 K sample due to the effects of grain boundaries, which resulted in different kinds of phase transition reactions.
KW - Fine particles
KW - Lithium manganese oxide
KW - Phase transition
KW - Rechargeable lithium batteries
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U2 - 10.1016/j.jpowsour.2007.06.193
DO - 10.1016/j.jpowsour.2007.06.193
M3 - Article
AN - SCOPUS:36148990238
SN - 0378-7753
VL - 174
SP - 1057
EP - 1062
JO - Journal of Power Sources
JF - Journal of Power Sources
IS - 2
ER -
