Synthesis by a soft chemistry route and characterization of LixNi1-xO (0 < x < 0.5) compounds:: Behavior in molten carbonates

被引：18
作者：
Belhomme, C
Cassir, M
Devynck, J
Gregoire, G
机构：
[1] Ecole Natl Super Chim Paris, Lab Electrochim & Chim Analyt, UMR 7575, F-75231 Paris 05, France
[2] Ecole Natl Super Chim Paris, Lab Chim Appl Etat Solide, UMR 7574, F-75231 Paris, France
来源：
JOURNAL OF MATERIALS SCIENCE | 2000年 / 35卷 / 11期
关键词：
D O I：
10.1023/A:1004793607621
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
LixNi1-xO powders and LixNi1-xO/Au with 0 < x < 0.5 are synthesized by a soft chemistry route. Analysis of LixNi1-xO by XRD shows an evolution from NiO (0 < x < 0.3) to LiNiO2 (0.3 < x < 0.5) structures. The stability of LixNi1- O-x/Au (0 < x 0.5) compounds synthesized by soft chemistry is studied in molten (Li0.52Na0.48)(2)CO3 eutectic at 650 degrees C, under the cathode atmosphere used in molten carbonate fuel cells (air/CO2: 70/30). After a 48 h immersion, analysis by XRD of the lithiated nickel oxide shows that lithium ions diffuse from the oxide to the bulk of the melt. The major oxide detected at the surface of the sample has a composition very close to that of NiO formed in situ at the surface of a nickel foil. Hence, highly lithiated nickel oxides are not stable in the melt. LixNi1-xO is rapidly transformed confirming the very high stability of Ni(II) in the working conditions. (C) 2000 Kluwer Academic Publishers.
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页码：2683 / 2688
页数：6
相关论文
共 28 条
  • [11] Behaviour of nickel species in molten Li2CO3+Na2CO3+K2CO3 .2. Electrochemical characterization under P(CO2)=0.1 atm+P(O-2)=0.9atm, P(Ar)=1 atm and P(O-2)=1 atm
    Malinowska, B
    Cassir, M
    Devynck, J
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1996, 417 (1-2): : 135 - 143
  • [12] Performance and life of 10-kW molten-carbonate fuel cell stack using Li/K and Li/Na carbonates as the electrolyte
    Mugikura, Y
    Yoshiba, F
    Izaki, Y
    Watanabe, T
    Takahashi, K
    Takashima, S
    Kahara, T
    [J]. JOURNAL OF POWER SOURCES, 1998, 75 (01) : 108 - 115
  • [13] ELECTROCHEMICAL CHARACTERIZATION OF INSITU NIO FORMATION IN A MOLTEN CARBONATE
    NISHINA, T
    TAKIZAWA, K
    UCHIDA, I
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1989, 263 (01): : 87 - 96
  • [14] PASCAL P, 1963, NOUVEAU TRAITE CHIM, P731
  • [15] Rodriguez-Carvajal J., 1990, SATELL MEET POWDER D, V127
  • [16] SELMAN JR, 1982, MOLTEN SALT TECHNOLO, P383
  • [17] REVISED EFFECTIVE IONIC-RADII AND SYSTEMATIC STUDIES OF INTERATOMIC DISTANCES IN HALIDES AND CHALCOGENIDES
    SHANNON, RD
    [J]. ACTA CRYSTALLOGRAPHICA SECTION A, 1976, 32 (SEP1): : 751 - 767
  • [18] SWANSON T, 1953, 539I NBS, P47
  • [19] Swanson T., 1953, 539 NATL BUR STAND, V539, p[I, 33]
  • [20] OXIDE ELECTRODES IN MOLTEN CARBONATES .1. ELECTROCHEMICAL-BEHAVIOR OF NICKEL IN MOLTEN LI+K AND NA+K CARBONATE EUTECTICS
    TOMCZYK, P
    SATO, H
    YAMADA, K
    NISHINA, T
    UCHIDA, I
    [J]. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 391 (1-2): : 125 - 132
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