TY - JOUR
T1 - Temperature-dependent structural behavior of mixed-metal hydroxides in air
AU - Lee, Yun Hee
AU - Kim, Ki Bok
AU - Gregory, D. H.
AU - Kim, Yong Il
N1 - Funding Information:
We wish to acknowledge the help provided by Dr. Jin-Yoo Suh at High-Temperature Energy Materials Research Center, Korea Institute of Science and Technology. This research was partially supported by the Korea Institute of Energy Technology Evaluation and Planning funded by the Ministry of Trade, Industry and Energy (MOTIE) of the Korea government ( KETEP 20131010501810 ), and the Converging Research Center Program through the Ministry of Science, ICT and Future Planning, Korea ( NRF 2014M1A7A1A01030128 ).
Publisher Copyright:
© 2015 Elsevier B.V. All rights reserved.
Copyright:
Copyright 2016 Elsevier B.V., All rights reserved.
PY - 2015/7/15
Y1 - 2015/7/15
N2 - Abstract A co-precipitation process using transition metal hydrates was used to prepare a mixture of M(OH)2 and MO(OH) (M=Ni0.5Co0.2Mn0.3). This powder consisted of dense, quasi-spherical particles each composed of plate-like particles of ca. 250 nm across. By increasing the temperature, M(OH)2 was made to transform into MO(OH) at ca. 220 °C, then into M3O4 at ca. 330 °C. Moreover, the M3O4 phase persisted without further reaction until 700 °C. During these phase transitions, the mixed-metal (M) in M(OH)2, MO(OH) and M3O4 retained disordered cation distributions at the same crystallographic sites of their host lattices without appearance of any phases related to Ni, Co and Mn. The MO(OH) phase appeared owing to exposure to air. M(OH)2 at room temerature had the lattice parameters (a=b=2.9991(2) Å and c=8.5892(2) Å) with space group (3¯P63/mmc).
AB - Abstract A co-precipitation process using transition metal hydrates was used to prepare a mixture of M(OH)2 and MO(OH) (M=Ni0.5Co0.2Mn0.3). This powder consisted of dense, quasi-spherical particles each composed of plate-like particles of ca. 250 nm across. By increasing the temperature, M(OH)2 was made to transform into MO(OH) at ca. 220 °C, then into M3O4 at ca. 330 °C. Moreover, the M3O4 phase persisted without further reaction until 700 °C. During these phase transitions, the mixed-metal (M) in M(OH)2, MO(OH) and M3O4 retained disordered cation distributions at the same crystallographic sites of their host lattices without appearance of any phases related to Ni, Co and Mn. The MO(OH) phase appeared owing to exposure to air. M(OH)2 at room temerature had the lattice parameters (a=b=2.9991(2) Å and c=8.5892(2) Å) with space group (3¯P63/mmc).
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U2 - 10.1016/j.matlet.2015.03.021
DO - 10.1016/j.matlet.2015.03.021
M3 - Article
AN - SCOPUS:84961312270
SN - 0167-577X
VL - 151
SP - 104
EP - 108
JO - Materials Letters
JF - Materials Letters
M1 - 18613
ER -