Electrochemical intercalation of sodium in NaxCoO2 bronzes

Delmas, Claude; Braconnier, Jean-Jacques; Fouassier, C.; Hagenmuller, Paul

doi:10.1016/0167-2738(81)90076-x

Cited by 832 publications

(727 citation statements)

References 7 publications

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“…Transitions from one stacking to another are possible through slab gliding requiring only small atomic displacement and no breaking of M-O bonds. They can therefore occur at room temperature during the cycling of the battery 29,30,39,40 , as it was more recently shown in the O3-NaxMn1/3Fe2/3O2 system 41 . This difference in stacking arrangements leads to a significant change in intensity ratio between the reflections 104h and 105h in the Xray diffraction patterns indexed with an undistorted hexagonal cell.…”

Section: Evolution Of the Cell Parameters And Stackingmentioning

confidence: 96%

The Na_xMoO₂ Phase Diagram (¹/₂ ≤ x < 1): An Electrochemical Devil’s Staircase

Vitoux¹,

Guignard²,

Suchomel³

et al. 2017

Chem. Mater.

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Layered sodium transition metal oxides represent a complex class of materials that exhibit a variety of properties, e.g. superconductivity, and can feature in a range of applications, e.g. batteries. Understanding the structure-function relationship is key to developing better materials. In this context, the phase diagram of the NaxMoO2 system has been studied using electrochemistry combined with in situ synchrotron X-ray diffraction experiments. The many steps observed in the electrochemical curve of Na2/3MoO2 during cycling in a sodium battery suggests numerous reversible structural transitions during sodium (de)intercalation between Na0.5MoO2 and Na~1MoO2. In situ X-ray diffraction confirmed the complexity of the phase diagram within this domain, thirteen single phase domains with minute changes in sodium contents. Almost all display superstructure or modulation peaks in their X-ray diffraction patterns suggesting the existence of many NaxMoO2 specific phases that are believed to be characterized by sodium/vacancy ordering as well as Mo-Mo bonds and subsequent Mo-O distances patterning in the structures. Moreover, a room temperature triclinic distortion was evidenced in the composition range 0.58 ≤ x < 0.75, for the first time in a sodium layered oxide system. Monoclinic and triclinic subcell parameters were refined for every NaxMoO2 phase identified. Reversible [MoO2] slab glidings occur during the sodium (de)intercalation. This level of structural detail provides unprecedented insight on the phases present and their evolution which may allow each phase to be isolated and examined in more detail.

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Section: Evolution Of the Cell Parameters And Stackingmentioning

confidence: 96%

The Na_xMoO₂ Phase Diagram (¹/₂ ≤ x < 1): An Electrochemical Devil’s Staircase

Vitoux¹,

Guignard²,

Suchomel³

et al. 2017

Chem. Mater.

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“…S odium-ion rechargeable batteries, using abundant sodium sources, are suitable for use in distributed power systems that store renewable energy at individual houses [1][2][3][4] . Currently, sodium − sulphur (NAS) batteries 5 are used for large-scale storage, because they have high energy densities of up to 760 Wh kg − 1 .…”

mentioning

confidence: 99%

Superionic glass-ceramic electrolytes for room-temperature rechargeable sodium batteries

et al. 2012

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Innovative rechargeable batteries that can effectively store renewable energy, such as solar and wind power, urgently need to be developed to reduce greenhouse gas emissions. All-solid-state batteries with inorganic solid electrolytes and electrodes are promising power sources for a wide range of applications because of their safety, long-cycle lives and versatile geometries. Rechargeable sodium batteries are more suitable than lithium-ion batteries, because they use abundant and ubiquitous sodium sources. solid electrolytes are critical for realizing allsolid-state sodium batteries. Here we show that stabilization of a high-temperature phase by crystallization from the glassy state dramatically enhances the na + ion conductivity. An ambient temperature conductivity of over 10 − 4 s cm − 1 was obtained in a glass-ceramic electrolyte, in which a cubic na 3 Ps 4 crystal with superionic conductivity was first realized. All-solid-state sodium batteries, with a powder-compressed na 3 Ps 4 electrolyte, functioned as a rechargeable battery at room temperature.

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“…There is an urgent need for alternative energy storage devices with a performance comparable to, or better than rechargeable lithium batteries. One possible approach is to use sodium as an alternative charge carrier [3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18] to lithium, as the cost of sodium carbonate (Na 2 CO 3 ), for example, is only 3% of Li 2 CO 3 (ref. 5).…”

mentioning

confidence: 99%

Aromatic porous-honeycomb electrodes for a sodium-organic energy storage device

et al. 2013

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Rechargeable batteries using organic electrodes and sodium as a charge carrier can be highperformance, affordable energy storage devices due to the abundance of both sodium and organic materials. However, only few organic materials have been found to be active in sodium battery systems. Here we report a high-performance sodium-based energy storage device using a bipolar porous organic electrode constituted of aromatic rings in a porous-honeycomb structure. Unlike typical organic electrodes in sodium battery systems, the bipolar porous organic electrode has a high specific power of 10 kW kg À 1 , specific energy of 500 Wh kg À 1 , and over 7,000 cycle life retaining 80% of its initial capacity in half-cells. The use of bipolar porous organic electrode in a sodium-organic energy storage device would significantly enhance cost-effectiveness, and reduce the dependency on limited natural resources. The present findings suggest that bipolar porous organic electrode provides a new material platform for the development of a rechargeable energy storage technology.

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Electrochemical intercalation of sodium in NaxCoO2 bronzes

Cited by 832 publications

References 7 publications

The Na_xMoO₂ Phase Diagram (¹/₂ ≤ x < 1): An Electrochemical Devil’s Staircase

The Na_xMoO₂ Phase Diagram (¹/₂ ≤ x < 1): An Electrochemical Devil’s Staircase

Superionic glass-ceramic electrolytes for room-temperature rechargeable sodium batteries

Aromatic porous-honeycomb electrodes for a sodium-organic energy storage device

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Electrochemical intercalation of sodium in NaxCoO2 bronzes

Cited by 832 publications

References 7 publications

The NaxMoO2 Phase Diagram (1/2 ≤ x < 1): An Electrochemical Devil’s Staircase

The NaxMoO2 Phase Diagram (1/2 ≤ x < 1): An Electrochemical Devil’s Staircase

Superionic glass-ceramic electrolytes for room-temperature rechargeable sodium batteries

Aromatic porous-honeycomb electrodes for a sodium-organic energy storage device

Contact Info

Product

Resources

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The Na_xMoO₂ Phase Diagram (¹/₂ ≤ x < 1): An Electrochemical Devil’s Staircase

The Na_xMoO₂ Phase Diagram (¹/₂ ≤ x < 1): An Electrochemical Devil’s Staircase