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Impedance and modulus spectroscopy studies
of Ba4SrSmTi3V7O30 ceramics
P. S. SAHOO1, A. PANIGRAHI2, S. K. PATRI3, R. N. P. CHOUDHARY3
1Department of Physics
Betnoti College Betnoti
Mayurbhanj, Orissa
India
2Department of Physics
D. N. College
Itanagar, Arunachal Pradesh
India
3Department of Physics & Meteorology
IIT, Kharagpur, 721302
India
Cycling behaviour of barium doped LiMn2O4
cathode materials for Li ion secondary batteries
H. SAHAN, H. GÖKTEPE, S. PATAT
Department of Chemistry
Faculty of Science
Erciyes University
38039 Kayseri
Turkey
Abstract
In order to improve the cycling performance of LiMn2O4, the spinel phase LiMn2–xBaxO4 (x = 0.01, 0.02 and 0.05) compounds were fabricated by the glycine–nitrate method. The structures of the products were investigated by X–ray diffraction. Electrochemical studies were carried out using the Li|LiMn2O4 and Li|LiMn2–xBaxO4 cells. The capacity loss of Li|LiMn2O4 cell is about 15% after 30 cycles, whereas that for Ba doped spinel materials (x = 0.01, 0.02 and 0.05) are 7.5%, 3.5% and 1.8% respectively. The good capacity retention of LiMn2–xBaxO4 electrodes is attributed to stabilization of the spinel structure by Ba doping of Mn sites. Ba substituted spinels display better cycle performance in terms of cycle life compared with LiMn2O4.
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A study of a block copolymer synthesized
by RAFT polymerization containing carbazole groups
and a europium complex
W. WANG1,2, Q. D. LING2, M. J. LIN1, Q. H. CHEN1
1College of Chemistry and Material Science
Fujian Normal University
Fuzhou 350007
P. R. China
2Fujian Key Laboratory of Polymer Materials
Fuijan Normal University
Fuzhou 350007
P. R. China
The effect of Congo red inhibitor on the corrosion
of various steels in a 3.5% NaCl medium
M. SAHIN1, A. ASAN2, H. CELIKKAN2, M. L. AKSU4
1Turkish Mineral Research and Exploration
Institute
06500, Ankara
Turkey
2Hitit University
Faculty of Engineering
Department of Chemical Engineering
19030, Çorum
Turkeya
3Gazi University
Faculty of Science Department of Chemistry
06500, Ankara
Turkey
4Gazi University
Faculty of Education
Department of Chemistry Education
06500, Ankara
Turkey
Preparation of Ni/MgO catalysts
for carbon nanofibres by a self–propagating
low temperature combustion process
Y. ZHANG1, Y. H. TANG2, E. L. ZHANG2, L. W. LIN2, L. Z. PEI3
1Department of Mechanical Engineering
Xiamen University of Technology
Xiamen Fujian 361024
P. R. China
2College of Materials Science and Engineering
Hunan University
Changsha, Hunan 410082
P. R. China
3School of Materials Science and Engineering
Anhui University of Technology
Ma´anshan Anhui 243002
P. R. China
Synthesis and characterization of magnetite
nanoparticles by a simple solvothermal method
P. OU, G. XU, C. XU, Y. ZHANG, X. HOU, G. HAN
State Key Laboratory of Silicon Materials
Department of Materials Science and Engineering
Zhejiang University
Hangzhou 310027
P. R. China
Room temperature ferromagnetism
in Si nanocaps on self–assembled glass beads
Y. C. CHI1, Y. LIOU2
1Institute of Materials Engineering
National Taiwan Ocean University
Keelung, 20224 Taiwan
Republic of China
2Institute of Physics
Academia Sinica
Taipei, 11529 Taiwan
Republic of China
Modification of the 306 Edwards sputtering system
for the reproducible fabrication of sensitive thin films
A. YOFFE1, V. SHELUKHIN2
1The Helen and Martin Kimmel Center
for Nanoscale Science
Weizmann Institute of Science
PO Box 26, Rehovot
Israel
2Department of Materials and Interfaces
Weizmann Institute of Science
PO Box 26, Rehovot
Israel
