Thermoelectric properties of LiCo1−
 xMxO2 (M = Cu, Mg, Ni, Zn): Comparison with LiyCoO2 and NayCoO2 systems

Mizuno, Shouta; Fujishiro, Hiroyuki; Ishizawa, Mamoru; Naito, Tomoyuki; Katsui, Hirokazu; Goto, Takashi

doi:10.7567/jjap.56.021101

Cited by 3 publications

(2 citation statements)

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“…The usual cathode AM is lithium‐cobalt‐oxide (LCO) or lithium‐nickel‐manganese‐cobalt‐oxide (NMC). An average thermal conductivity of 3.5 W m −1 K −1 [ 66–71 ] was found for polycrystalline LCO, with a typical grain size of 2 nm. Cheng et al [ 72 ] determined a thermal conductivity of 4.2 W m −1 K −1 for NMC, which deviates only by 0.7 W m −1 K −1 from the value of LCO mentioned earlier.…”

Section: Resultsmentioning

confidence: 99%

Investigation of the Effective Thermal Conductivity of Cell Stacks of Li‐Ion Batteries

et al. 2020

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Knowledge of the thermal transport properties of the individual battery components and their combination is required for the design of thermally optimized lithium‐ion batteries. Based on this, the limiting components can be identified and potentially improved. In this contribution, the microstructures of commercial porous electrode coatings, electrode stacks, and cell stacks are reconstructed based on experimentally determined structure parameters using a specifically developed structure generation routine. The effective thermal conductivity of the generated stacked structures is then determined by a numerical tool developed in‐house based on the finite‐volume method. The results are compared with an analytical model for fast accurate predictions which takes the morphological parameter sets and the geometry of the stacks into account. Both models are used to identify the system‐limiting components via selected simulation studies. Finally, the results of both models are compared with experimental data for commercial electrode stacks and common literature values for cell stacks.

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Section: Resultsmentioning

confidence: 99%

Investigation of the Effective Thermal Conductivity of Cell Stacks of Li‐Ion Batteries

et al. 2020

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“…Among all the Li-transition metal oxides, LiCoO 2 has been extensively investigated both for low-and high-temperature application. In these oxides, it has been observed that substitution of non-isovalent ions such as Ni 2+ and Mg 2+ for Co 3+ results in increasing the electrical conductivity while isovalent substitution with Fe 3+ results in decreasing the electrical conductivity [4,12,13].…”

Section: Introductionmentioning

confidence: 99%

Thermo-transport properties of Zn-substituted layered Li-nickel oxide, $$\hbox {LiNiO}_{2}$$ LiNiO 2

Mallick

Vitta

2018

Bull Mater Sci

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The layered Li-TM-O 2 materials have been investigated extensively due to their application as cathodes in Li batteries. The electrical properties of these oxides can be tuned or controlled either by non-stoichiometry or substitution. Hence the thermo-transport properties of Zn-substituted LiNi 1−x Zn x O 2 for 0 ≤ x ≤ 0.16 have been investigated in the temperature range of 300-900 K for potential application as a high-temperature thermoelectric material. For x < 0.08, the compounds were of single phase belonging to the space group R-3mH while for x > 0.08 an additional minority phase, ZnO forms together with the main layered phase. All the compounds exhibit a semiconducting behaviour with electrical resistivity, varying in the range of ∼10 −4 to 10 −2 m between 300 and 900 K. The electrical resistivity is found to increase with increasing Zn-substitution predominantly due to a decrease in the charge carrier hole mobility. The activation energy remains constant, ∼10 meV, with Zn-substitution. The Seebeck coefficient of the compounds is found to decrease with increasing temperature and increase with increasing Zn-substitution. The Seebeck coefficient decreases from ∼95 to 35 μV K −1 and the corresponding power factor is ∼12 μW m −1 K −2 for the x = 0.16 compound.

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Lattice thermal conductivity of NaCoO₂ and LiCoO₂ intercalation materials studied by hybrid density functional theory

Mattila

Karttunen

2020

Mater. Res. Express

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We have studied the lattice dynamics and lattice thermal conductivity of NaCoO2 intercalation material with first-principles hybrid density functional methods. The lattice thermal conductivity has been obtained using linearized Boltzmann transport theory and the contributions to the lattice thermal conductivity have been analyzed in detail. The results obtained for NaCoO2 have been systematically compared with LiCoO2 to shed light on the effect of the alkali metal atom. The room-temperature in-plane lattice thermal conductivities within relaxation time approximation are 78 Wm−1K−1 and 46 Wm−1K−1 for NaCoO2 and LiCoO2, respectively. The respective room-temperature cross-plane lattice-thermal conductivities are 25.0Wm−1K−1 and 6.6 Wm−1K−1. The predicted lattice thermal conductivities for fully alkali-occupied single crystals are clearly larger in comparison to the experimental values obtained for single-crystal NaCoO2 and polycrystalline LiCoO2. Analysis of the lattice thermal conductivity reveals that the differences between NaCoO2 and LiCoO2 can be explained by significantly shorter phonon lifetimes in LiCoO2.

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Thermoelectric properties of LiCo₁₋ _xM_xO₂ (M = Cu, Mg, Ni, Zn): Comparison with Li_yCoO₂ and Na_yCoO₂ systems

Cited by 3 publications

References 40 publications

Investigation of the Effective Thermal Conductivity of Cell Stacks of Li‐Ion Batteries

Investigation of the Effective Thermal Conductivity of Cell Stacks of Li‐Ion Batteries

Thermo-transport properties of Zn-substituted layered Li-nickel oxide, $$\hbox {LiNiO}_{2}$$ LiNiO 2

Lattice thermal conductivity of NaCoO₂ and LiCoO₂ intercalation materials studied by hybrid density functional theory

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Thermoelectric properties of LiCo1− xMxO2 (M = Cu, Mg, Ni, Zn): Comparison with LiyCoO2 and NayCoO2 systems

Cited by 3 publications

References 40 publications

Investigation of the Effective Thermal Conductivity of Cell Stacks of Li‐Ion Batteries

Investigation of the Effective Thermal Conductivity of Cell Stacks of Li‐Ion Batteries

Thermo-transport properties of Zn-substituted layered Li-nickel oxide, $$\hbox {LiNiO}_{2}$$ LiNiO 2

Lattice thermal conductivity of NaCoO2 and LiCoO2 intercalation materials studied by hybrid density functional theory

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Thermoelectric properties of LiCo₁₋ _xM_xO₂ (M = Cu, Mg, Ni, Zn): Comparison with Li_yCoO₂ and Na_yCoO₂ systems

Lattice thermal conductivity of NaCoO₂ and LiCoO₂ intercalation materials studied by hybrid density functional theory