High-temperature phase transition in the three-layered sodium cobaltite<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mi>P</mml:mi><mml:mo>′</mml:mo></mml:msup><mml:mn>3</mml:mn><mml:msub><mml:mrow><mml:mtext>-Na</mml:mtext></mml:mrow><mml:mi>x</mml:mi></mml:msub><mml:msub><mml:mrow><mml:mtext>CoO</mml:mtext></mml:mrow><mml:mn>2</mml:mn></mml:msub><mml:mspace width="0.3em" /><mml:mrow><mml:mo>(</mml:mo><mml:mrow><mml:mi>x</mml:mi><mml:mo>∼</mml:mo><mml:mn

Blangero, Maxime; Carlier, Dany; Pollet, M.; Darriet, Jacques; Delmas, Claude; Doumerc, Jean‐Pierre

doi:10.1103/physrevb.77.184116

Cited by 52 publications

(20 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This result is in good agreement with previously published results for three-Co-layers cobaltates. 8,20,23 The value of c H ͓deduced from the measurement by the formula c H =2 ‫ء‬ c M ‫ء‬ sin͑␤͔͒ is slightly smaller than the one reported for Na 0.75 CoO 2 , which indicates a Na content slightly above x = 0.75. In these highly Na doped three-Co-layers compounds, the ideal rhombohedral structure is weakly distorted into a monoclinic one.…”

Section: B Characterizationcontrasting

confidence: 47%

“…The associated spin entropy supposedly leads to the enhanced thermoelectric power reported in this material. 7 Complexity is further introduced by the presence of disorder-order transitions in the alkali layers, [8][9][10][11] ͑also observed in other parent cobaltates 12 ͒. Na was reported to form a long-range superstructure whose pattern is well accounted for by electrostatic interactions and the amount of Na vacancies in the lattice.…”

Section: Introductionmentioning

confidence: 97%

See 1 more Smart Citation

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56
Foury-Leylekian
¹
,
Poltavets
²
,
Jaouen
³

et al. 2009
Phys. Rev. B
11
0
11
0
View full text Add to dashboard Cite

We present a direct study of the Co charge order and Na ordering in three Co-layers Na x CoO 2 ͑x ϳ 5 6 ͒ single crystals. From diffuse scattering measurements, we propose a model of Na supercell which rules out the ones previously suggested in parent cobaltates with double Co layers. Via a direct measurement of the Co charge state using anomalous x-ray scattering, we also evidence a Co charge order which evolves between 200 and 290 K.

show abstract

Section: B Characterizationcontrasting

confidence: 47%

Section: Introductionmentioning

confidence: 97%

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56
Foury-Leylekian
¹
,
Poltavets
²
,
Jaouen
³

et al. 2009
Phys. Rev. B
11
0
11
0
View full text Add to dashboard Cite

show abstract

“…The same series cobaltite, Na 0.62 CoO 2 , was found to have a phase transition induced electrical transport behavior change at ∼350 K [25]. It is of great importance to investigate whether a structural change induces the resistivity anomaly and to determine the atomic level changes associated with the temperature dependence of the Ca 3 Co 4 O 9 resistivity.…”

Section: Introductionmentioning

confidence: 99%

A structural change in Ca₃Co₄O₉associated with enhanced thermoelectric properties

Tyson

Chen

et al. 2012

J. Phys.: Condens. Matter

View full text Add to dashboard Cite

Temperature dependent electrical resistivity, crystal structure and heat capacity measurements reveal a resistivity drop and electrical transport behavior change corresponding to a structural change near 400 K in Ca(3)Co(4)O(9). The lattice parameter c varies smoothly with increasing temperature while anomalies in a, b(1) and b(2) lattice parameters occur near 400 K. The Ca site in the Ca(2)CoO(3) block becomes distorted and a change in electrical transport behavior is found above 400 K. Resistivity and heat capacity measurements as a function of temperature under magnetic field combined with Co L-edge x-ray absorption spectra reveal only a weak spin contribution to this change. Reduced resistivity associated with the structural change enhances the thermoelectric properties at moderately high temperatures and points to the electrical transport behavior change as a mechanism for improved ZT in this thermoelectric oxide.

show abstract

“…Comparison of in operando SXRPD data at the start of cycling with XRPD data of the precursor materials indicated that both samples spontaneously undergo a chemical reaction in the absence of current within the battery ( Figure S7, Supporting Information). In other layered oxides adopting the monoclinic P′3-type structure at room temperature, the lattice becomes hexagonal upon heating and the reaction is fully reversible on cooling, [32,33] suggesting a higher stability of the monoclinic form. Accordingly, the open-circuit voltage of freshly assembled batteries decreases over time before cycling ( Figure S10, Supporting Information).…”

mentioning

confidence: 99%

Structural Insight into Layer Gliding and Lattice Distortion in Layered Manganese Oxide Electrodes for Potassium‐Ion Batteries

Zhang

Didier

Pang

et al. 2019

Advanced Energy Materials

138

117

View full text Add to dashboard Cite

grids. Current growth rates in lithiumion battery (LIB) manufacturing are not sustainable given our limited lithium resources. In this context, alternative battery systems with low cost are sought, with sodium-and potassium-ion batteries (SIBs and PIBs, respectively) regarded as suitable replacements due to the high natural abundance of sodium and potassium and their similar working mechanism to LIBs. [1] Of these, PIBs are more promising due to the closeness of the K + /K redox potential (−2.9 V vs H + /H 2 O) to that of Li + /Li (−3.0 V vs H + /H 2 O), as compared to Na + /Na (−2.7 V vs H + /H 2 O), and the consequential ease of reversible K + intercalation into the most common LIB negative electrode, graphite. [2][3][4] The slow kinetics of the reversible insertion of K + in electrode materials as a result of its relatively large ionic radius of 1.38 Å is a major issue for the realization of high-performance PIBs. [5][6][7] For PIB technology to be successful, scientists need to find stable electrode materials capable of reversibly hosting K + relatively quickly. Transition metal layered oxides possess a 2D structure that can accommodate large ions and are attracting interest as potential PIB electrode materials. [8][9][10][11][12][13][14] Among these, manganese layered oxides are particularly promising due to the high natural abundance and nontoxicity of manganese. A range of layered K x MnO 2 structure types can be prepared [15,16] including Potassium-ion batteries (PIBs) are an emerging, affordable, and environmentally friendly alternative to lithium-ion batteries, with their further development driven by the need for suitably performing electrode materials capable of reversibly accommodating the relatively large K + . Layer-structured manganese oxides are attractive as electrodes for PIBs, but suffer from structural instability and sluggish kinetics of K + insertion/extraction, leading to poor rate capability. Herein, cobalt is successfully introduced at the manganese site in the K x MnO 2 layered oxide electrode material and it is shown that with only 5% Co, the reversible capacity increases by 30% at 22 mA g -1 and by 92% at 440 mA g -1 . In operando synchrotron X-ray diffraction reveals that Co suppresses Jahn-Teller distortion, leading to more isotropic migration pathways for K + in the interlayer, thus enhancing the ionic diffusion and consequently, rate capability. The detailed analysis reveals that additional phase transitions and larger volume change occur in the Co-doped material as a result of layer gliding, with these associated with faster capacity decay, despite the overall capacity remaining higher than the pristine material, even after 500 cycles. These results assert the importance of understanding the detailed structural evolution that underpins performance that will inform the strategic design of electrode materials for high-performance PIBs.

show abstract

High-temperature phase transition in the three-layered sodium cobaltiteP′3-NaxCoO2(x∼

Cited by 52 publications

References 49 publications

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56
Foury-Leylekian
¹
,
Poltavets
²
,
Jaouen
³

et al. 2009
Phys. Rev. B
11
0
11
0
View full text Add to dashboard Cite

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56
Foury-Leylekian
¹
,
Poltavets
²
,
Jaouen
³

et al. 2009
Phys. Rev. B
11
0
11
0
View full text Add to dashboard Cite

A structural change in Ca₃Co₄O₉associated with enhanced thermoelectric properties

Structural Insight into Layer Gliding and Lattice Distortion in Layered Manganese Oxide Electrodes for Potassium‐Ion Batteries

Contact Info

Product

Resources

About

High-temperature phase transition in the three-layered sodium cobaltiteP′3-NaxCoO2(x∼

Cited by 52 publications

References 49 publications

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56Foury-Leylekian1, Poltavets2, Jaouen3 et al. 2009Phys. Rev. B110110View full textAdd to dashboardCite

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56Foury-Leylekian1, Poltavets2, Jaouen3 et al. 2009Phys. Rev. B110110View full textAdd to dashboardCite

A structural change in Ca3Co4O9associated with enhanced thermoelectric properties

Structural Insight into Layer Gliding and Lattice Distortion in Layered Manganese Oxide Electrodes for Potassium‐Ion Batteries

Contact Info

Product

Resources

About

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56
Foury-Leylekian
¹
,
Poltavets
²
,
Jaouen
³

et al. 2009
Phys. Rev. B
11
0
11
0
View full text Add to dashboard Cite

Sodium ion and cobalt charge ordering inNaxCoO2(x∼56
Foury-Leylekian
¹
,
Poltavets
²
,
Jaouen
³

et al. 2009
Phys. Rev. B
11
0
11
0
View full text Add to dashboard Cite

A structural change in Ca₃Co₄O₉associated with enhanced thermoelectric properties