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Title: Phase relationship and lithium deintercalation in lithium nickel oxides

Abstract

The phase relationship between LiNiO[sub 2] and its related compounds was examined by X-ray diffraction, neutron diffraction, DTA-TG, and electrical, magnetic, and electrochemical measurements. Decomposition of LiNiO[sub 2] proceeded at higher temperatures to Li[sub 1[minus]x]Ni[sub 1+x]O[sub 2] with the partially disordered [alpha]-NaFeO[sub 2] structure and Li[sub x]Ni[sub 1[minus]x]O with the fully disordered rock-salt structure. Higher oxygen partial pressure in the atmosphere suppressed the decomposition reaction, which was considered to be the reduction from Ni[sup 3+] to Ni[sup 2+] state. The nearly stoichiometric [open quotes]LiNiO[sub 2][close quotes] was synthesized at reaction temperatures below 700[degrees]C in an oxygen gas flow with the starting materials Li[sub 2]O[sub 2] and NiO. Neutron diffraction measurement confirmed the composition Li[sub 0.996]Ni[sub 1.006]O[sub 2], which is very close to the stoichiometry. The deintercalation mechanism of LiNiO[sub 2] and the spinel transformation process from Li[sub 1[minus]x]NiO[sub 2] to Li[sub y]Ni[sub 2]O[sub 4] to Li[sub 0.3]NiO[sub 2] monophasically when the cell configuration allowed a homogeneous reaction. The range of solid solutions 0.8 [le] y [le] 1.8 was observed for the spinel Li[sub y]Ni[sub 2]O[sub 4] transformed from Li[sub 1[minus]x]NiO[sub 2] (0.1 [le] x [le] 0.6) by heat treatment at 180[degrees]C. The room-temperature intercalation to the spinel LiNi[sub 2]O[sub 4]more » gave the new polymorphism Li[sub 2]Ni[sub 2]O[sub 4] (LiNiO[sub 2]) with the cubic lattice parameter a = 8.207(3) [angstrom]. Electrical properties of the spinels were also examined.« less

Authors:
; ;  [1];  [2];  [3];  [4];  [5]
  1. Kobe Univ., Hyogo (Japan)
  2. Univ. of Tsukuba, Ibaraki (Japan)
  3. National Institute for Research in Inorganic Materials, Ibaraki (Japan)
  4. Mie Univ., Tsu, Mie (Japan)
  5. Kyoto Univ., Uji, Kyoto (Japan)
Publication Date:
OSTI Identifier:
6654370
Resource Type:
Journal Article
Journal Name:
Journal of Solid State Chemistry; (United States)
Additional Journal Information:
Journal Volume: 110:2; Journal ID: ISSN 0022-4596
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; LITHIUM OXIDES; PHASE STUDIES; NICKEL OXIDES; DIFFERENTIAL THERMAL ANALYSIS; ELECTRICAL PROPERTIES; LATTICE PARAMETERS; SOLID SOLUTIONS; STOICHIOMETRY; THERMAL GRAVIMETRIC ANALYSIS; ALKALI METAL COMPOUNDS; CHALCOGENIDES; CHEMICAL ANALYSIS; DISPERSIONS; GRAVIMETRIC ANALYSIS; LITHIUM COMPOUNDS; MIXTURES; NICKEL COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; PHYSICAL PROPERTIES; QUANTITATIVE CHEMICAL ANALYSIS; SOLUTIONS; THERMAL ANALYSIS; TRANSITION ELEMENT COMPOUNDS; 360602* - Other Materials- Structure & Phase Studies; 360204 - Ceramics, Cermets, & Refractories- Physical Properties

Citation Formats

Kanno, R, Kubo, H, Kawamoto, Y, Kamiyama, T, Izumi, F, Takeda, Y, and Takano, M. Phase relationship and lithium deintercalation in lithium nickel oxides. United States: N. p., 1994. Web. doi:10.1006/jssc.1994.1162.
Kanno, R, Kubo, H, Kawamoto, Y, Kamiyama, T, Izumi, F, Takeda, Y, & Takano, M. Phase relationship and lithium deintercalation in lithium nickel oxides. United States. doi:10.1006/jssc.1994.1162.
Kanno, R, Kubo, H, Kawamoto, Y, Kamiyama, T, Izumi, F, Takeda, Y, and Takano, M. Wed . "Phase relationship and lithium deintercalation in lithium nickel oxides". United States. doi:10.1006/jssc.1994.1162.
@article{osti_6654370,
title = {Phase relationship and lithium deintercalation in lithium nickel oxides},
author = {Kanno, R and Kubo, H and Kawamoto, Y and Kamiyama, T and Izumi, F and Takeda, Y and Takano, M},
abstractNote = {The phase relationship between LiNiO[sub 2] and its related compounds was examined by X-ray diffraction, neutron diffraction, DTA-TG, and electrical, magnetic, and electrochemical measurements. Decomposition of LiNiO[sub 2] proceeded at higher temperatures to Li[sub 1[minus]x]Ni[sub 1+x]O[sub 2] with the partially disordered [alpha]-NaFeO[sub 2] structure and Li[sub x]Ni[sub 1[minus]x]O with the fully disordered rock-salt structure. Higher oxygen partial pressure in the atmosphere suppressed the decomposition reaction, which was considered to be the reduction from Ni[sup 3+] to Ni[sup 2+] state. The nearly stoichiometric [open quotes]LiNiO[sub 2][close quotes] was synthesized at reaction temperatures below 700[degrees]C in an oxygen gas flow with the starting materials Li[sub 2]O[sub 2] and NiO. Neutron diffraction measurement confirmed the composition Li[sub 0.996]Ni[sub 1.006]O[sub 2], which is very close to the stoichiometry. The deintercalation mechanism of LiNiO[sub 2] and the spinel transformation process from Li[sub 1[minus]x]NiO[sub 2] to Li[sub y]Ni[sub 2]O[sub 4] to Li[sub 0.3]NiO[sub 2] monophasically when the cell configuration allowed a homogeneous reaction. The range of solid solutions 0.8 [le] y [le] 1.8 was observed for the spinel Li[sub y]Ni[sub 2]O[sub 4] transformed from Li[sub 1[minus]x]NiO[sub 2] (0.1 [le] x [le] 0.6) by heat treatment at 180[degrees]C. The room-temperature intercalation to the spinel LiNi[sub 2]O[sub 4] gave the new polymorphism Li[sub 2]Ni[sub 2]O[sub 4] (LiNiO[sub 2]) with the cubic lattice parameter a = 8.207(3) [angstrom]. Electrical properties of the spinels were also examined.},
doi = {10.1006/jssc.1994.1162},
journal = {Journal of Solid State Chemistry; (United States)},
issn = {0022-4596},
number = ,
volume = 110:2,
place = {United States},
year = {1994},
month = {6}
}