Equilibrium relationships in the systems Li-Co-O and Li-Ni-O

Moore, R. J.; White, Judith

doi:10.1007/bf00552925

Cited by 36 publications

(9 citation statements)

References 3 publications

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“…Several phase relation studies of the system Li O-NiO have been reported (4)(5)(6)(7). It (23,24) reported a phase transition around !203°C for "0 from orthorhombic to orthorhombic and a phase transition from tetragonal P4 /ncm to tetragonal I4/mmm around 287°C at +0.10.…”

Section: The System LI O-niomentioning

confidence: 97%

Phase Equilibria of the System La2O3–NiO–Li2O at 700, 800, and 900°C

Yang

Fan

et al. 1998

Journal of Solid State Chemistry

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Section: The System LI O-niomentioning

confidence: 97%

Phase Equilibria of the System La2O3–NiO–Li2O at 700, 800, and 900°C

Yang

Fan

et al. 1998

Journal of Solid State Chemistry

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“…This type of situation is typical of a solid-state diffusion-controlled reaction kinetics and was already described in the literature. 36 This also means that the shell region in these particles, where oxygen reduction is expected to occur, has the desirable enhanced electronic conductivity with respect to pure NiO.…”

Section: Testingmentioning

confidence: 99%

Electrode protective barrier layers for molten carbonate confinement

2020

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Summary Pure NiO or lithiated NiO with distinct Li/Ni atomic proportions (50/50—LN55 and 30/70—LN37) were tested as protective barrier layers (PBLs) to enhance the stability of LaCoO3 (LC) electrodes in cells with composite electrolytes (CEs) consisting of Gd‐doped ceria (CGO) and a eutectic mixture of Na and Li carbonates (NLCs). PBLs and LC layers were sequentially deposited by screen printing before firing at 700°C and 550°C, respectively, to yield symmetrical cells (LC|PBL|CE|PBL|LC). Electrochemical testing involved impedance spectroscopy measurements in air in the 500°C to 650°C range. Scanning electron microscopy combined with energy‐dispersive X‐ray spectroscopy (SEM/EDS) revealed that distinct PBLs possess uneven wetting tendency, with impact on the role of LC layers. The best electrode performance (0.55 Ω cm2 electrode area specific resistance at 550°C in air) was observed using the LN37 PBL, stable throughout endurance tests up to 200 hours. Possible electrode mechanisms consistent with experimental evidence suggest an active role of the molten phase as an intermediate provider of O2− transport between the electrode and CGO.

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“…Earlier studies (Johnston et al 1958;Moore & White 1974;Sato et al 1986) on the Li-Co-O system showed the formation of a range of Li-doped CoO solid solutions of general formula Li x Co 1Kx O or Li x Co 2C 1K2x Co 3C…”

Section: Cmentioning

confidence: 99%

“…During battery charging, Li C and e K are removed to give Li y CoO 2 , or Li y Co 3C 1Ky Co 4C y O 2 , and the associated Co 3C/4C redox couple is responsible for the 4 V charge/discharge characteristics. Earlier studies (Johnston et al 1958;Moore & White 1974;Sato et al 1986) on the Li-Co-O system showed the formation of a range of Li-doped CoO solid solutions of general formula Li x Co 1Kx O or Li x Co 2C 1K2x Co 3C…”

Section: Introductionmentioning

confidence: 99%

Partial cation-order and early-stage, phase separation in phase W, Li _x Co _{1−
x} O: 0.075≤ x ≤0.24−0.31

Pasero

McCabe

et al. 2009

Proc. R. Soc. A.

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We report the characterization using X-ray and neutron powder diffraction, transmission electron microscopy and extended X-ray absorption fine structure of a new, partially ordered rock-salt-like solid solution phase Li x Co 1Kx O: 0.075%x%0.24K0.31. The cation stacking sequence along [111] consists of alternating planes of Co and Co/Li. Nano-sized domains of this cation-ordered phase appear alongside disordered regions; domain size increases from 2 to 8 nm with increasing Li content. Compositions of ordered and disordered regions are Li-and Co-rich, respectively, and, therefore, the phase exhibits frozen-in, incipient phase separation. This microstructure could be considered as a precursor to precipitation of fully ordered, rhombohedral LiCoO 2 .

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Equilibrium relationships in the systems Li-Co-O and Li-Ni-O

Cited by 36 publications

References 3 publications

Phase Equilibria of the System La2O3–NiO–Li2O at 700, 800, and 900°C

Phase Equilibria of the System La2O3–NiO–Li2O at 700, 800, and 900°C

Electrode protective barrier layers for molten carbonate confinement

Partial cation-order and early-stage, phase separation in phase W, Li _x Co _{1−
x} O: 0.075≤ x ≤0.24−0.31

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Equilibrium relationships in the systems Li-Co-O and Li-Ni-O

Cited by 36 publications

References 3 publications

Phase Equilibria of the System La2O3–NiO–Li2O at 700, 800, and 900°C

Phase Equilibria of the System La2O3–NiO–Li2O at 700, 800, and 900°C

Electrode protective barrier layers for molten carbonate confinement

Partial cation-order and early-stage, phase separation in phase W, Li x Co 1− x O: 0.075≤ x ≤0.24−0.31

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Partial cation-order and early-stage, phase separation in phase W, Li _x Co _{1−
x} O: 0.075≤ x ≤0.24−0.31