Na0.67Mn1−xMgxO2 (0 ≤ x ≤ 0.2): a high capacity cathode for sodium-ion batteries

Billaud, Juliette; Singh, Gurcharan; Armstrong, A. Robert; Gonzalo, Elena; Roddatis, Vladimir; Armand, Michel; Rojo, Teófilo; Bruce, Peter G.

doi:10.1039/c4ee00465e

Cited by 425 publications

(448 citation statements)

References 24 publications

Supporting

Mentioning

407

Contrasting

Unclassified

Order By: Relevance

“…[13][14][15][16] The reversibility of the deintercalation process in the P2 polymorph is enhanced by Mg doping. 17 Solid solutions of Mn and Fe, Na x [Mn 1-y Fe y ]O 2 , adopting either O3 or P2 structures, have also been investigated. 10,18 Polyoxyanion compounds, particularly phosphates, are receiving considerable attention as alternative cathodes for rechargeable lithium and sodium batteries.…”

Section: Introductionmentioning

confidence: 99%

NaFe₃(HPO₃)₂((H,F)PO₂OH)₆: A Potential Cathode Material and a Novel Ferrimagnet

et al. 2016

Self Cite

View full text Add to dashboard Cite

A novel iron fluoro-phosphite, NaFe 3 (HPO 3 ) 2 ((H,F)PO 2 OH) 6 , has been synthesized by a dry low temperature synthesis route. The phase has been shown to be electrochemically active for reversible intercalation of Na + ions, with an average discharge voltage of 2.5 V and an experimental capacity at low rates of up to 90 mAh/g. Simple synthesis, low cost materials, excellent capacity retention and efficiency suggest this class of material is competitive with similar oxyanion-based compounds as a cathode material for Na-batteries. The characterization of physical properties by means of magnetization, specific heat and electron spin resonance measurements confirms the presence of two magnetically nonequivalent Fe 3+ sites. The compound orders magnetically at T C ~ 9.4 K into a state with spontaneous magnetization.

show abstract

Section: Introductionmentioning

confidence: 99%

NaFe₃(HPO₃)₂((H,F)PO₂OH)₆: A Potential Cathode Material and a Novel Ferrimagnet

et al. 2016

Self Cite

View full text Add to dashboard Cite

show abstract

“…• C. 12 The lifting and restoration of Jahn-Teller distortions, as the material is charged and discharged and the Mn oxidation state fluctuates between +3 and +4, induces a complicated sequence of electronic and structural processes evidenced by the large number electrochemical plateaus on the charge/discharge curve, as shown in Figure 6.…”

mentioning

confidence: 99%

“…On the other hand, an experimental study by Lei et al explored the Na x CoO 2 synthesis phase diagram. Na x MO 2 compounds are typically prepared via solid-state synthesis, 8,57 or a solution-state co-precipitation method, 9,12 with calcination temperatures ranging from 500 to 1000…”

mentioning

confidence: 99%

Review—Manganese-Based P2-Type Transition Metal Oxides as Sodium-Ion Battery Cathode Materials

Clément

Bruce

Grey

2015

J. Electrochem. Soc.

Self Cite

438

388

View full text Add to dashboard Cite

Sodium transition metal oxides (NaMO 2 ) with a P2 structure exhibit good Na + ion conductivity and are promising sodium-ion battery cathode materials. Manganese-based compounds have a high working potential vs. Na + /Na, and high capacity. Yet, the layered nature of these materials means that they are prone to structural rearrangements at high voltage/low Na contents, the phase transformations and Na + ion/vacancy ordering transitions resulting in capacity fade and poor reversibility. This review discusses the latest advances in the field and focuses mainly on recent work on Na y Mn 1-x M x O 2 (x, y ≤ 1, M = Ni, Mg, Li) compounds. We compare the different lithium and sodium transition metal layered oxides (P2, O3, etc.) and describe the structures and mechanisms observed on alkali (de)intercalation. The strategies used to enhance the electrochemical properties and stabilize the structural framework of sodium transition metal oxides are reviewed. We show how X-ray diffraction and 7 Li/ 23 Na solid-state Nuclear Magnetic Resonance can be combined to provide a detailed insight into the structural and electronic processes occurring upon electrochemical cycling of these materials. Why Are We Interested in Na-Ion Battery Cathodes?Together, the increasing demand for energy and the threat from Global Warming make electrical energy storage (EES) a world wide strategic priority. EES is expected to play a key role in the decarbonization of electric power sources. The two billion people worldwide not currently served by a reliable electricity supply are likely to be connected via local grids, for which EES is essential. While Li-ion batteries (LIBs) will play a role, a key challenge is to develop lower cost batteries that deliver safe, reliable storage with high cycle and calendar life. In this regard, Na-ion batteries (NIBs) are potentially important. NIBs operate in a similar fashion to LIBs, offering both advantages and disadvantages. Concerning the former, the ability to use Al instead of Cu as a current collector at the anode could substantially reduce cost. Na is also far more abundant in the Earth's crust than Li, and more widely distributed geographically. Regarding the disadvantages, the standard operating potential of Na metal is 300 mV more positive than Li metal. This generally translates into lower operating potentials for Na-ion systems, although the potential of a full cell depends on the difference in the chemical potentials of Na in the anode and cathode materials. There are considerable opportunities for scientists to develop new combinations of anode, electrolyte and cathode that are optimized for a variety of applications with different criteria such as high energy density, high power, and high operating potential. This has encouraged a rapid growth of interest in research into NIB components. Hard carbons show some promise as anodes, [1][2][3] but more must be done to improve performance. The cathode remains a major challenge and it is to this that we direct the current review. A comparative plot sho...

show abstract

“…Unlike A x CoO 2 systems, the physical properties of A x MnO 2 have yet to be clarified, although Na x MnO 2 has recently been proposed as a new candidate for the cathode active material in Na-ion batteries [39][40][41] because Mn (Clarke number: 0.09) is more abundant than Co (Clarke number: 0.004). At least two crystallographic phases of NaMnO 2 are known; low-temperature α-NaMnO 2 [39,42] has an O3 layered structure with monoclinic symmetry and high-temperature β-NaMnO 2 [40] has a Pmnm structure with orthorhombic symmetry.…”

Section: Na ≈2/3 Mno 2 Epitaxial Filmmentioning

confidence: 99%

“…It should be noted that the crystal symmetry of Na x MnO 2 strongly depends on x. The low-temperature phase Na 0.67 MnO 2 [41,43] has a P2 layered structure with hexagonal symmetry. Recently, Billaud et al [41] reported that Na 0.67 MnO 2 with a P2 structure exhibits a high capacity of 175 mA h g −1 with a good capacity retention.…”

Section: Na ≈2/3 Mno 2 Epitaxial Filmmentioning

confidence: 99%

Fabrication, Characterization, and Modulation of Functional Nanolayers

Ohta

Hiramatsu

2018

Nanoinformatics

View full text Add to dashboard Cite

Regions of a few nanometers at the surface or interface of a material exhibit various functional properties, which differ from those of the bulk because the electrons and/or ions receive different potentials due to the incoherent atomic arrangement. High-quality epitaxial films of functional materials called "nanolayers" are important to utilize such functional properties. However, fabrication of high-quality nanolayers of complex materials with complicated crystal structures is usually challenging due to the difference in the thermochemical properties of the constituents. In this chapter, epitaxial growth techniques, especially "reactive solid-phase epitaxy" of functional oxides and chalcogenides, are reviewed based on the authors' efforts. Additionally, this chapter reviews several modulation methods of optical, electrical, and magnetic properties of functional oxide nanolayers.

show abstract

Na_0.67Mn_1−xMg_xO₂ (0 ≤ x ≤ 0.2): a high capacity cathode for sodium-ion batteries

Abstract: Earth-abundant Na0.67[Mn1−xMgx]O2 (0 ≤ x ≤ 0.2) cathode materials with the P2 structure have been synthesized as positive electrodes for sodium-ion batteries.

Cited by 425 publications

References 24 publications

NaFe₃(HPO₃)₂((H,F)PO₂OH)₆: A Potential Cathode Material and a Novel Ferrimagnet

NaFe₃(HPO₃)₂((H,F)PO₂OH)₆: A Potential Cathode Material and a Novel Ferrimagnet

Review—Manganese-Based P2-Type Transition Metal Oxides as Sodium-Ion Battery Cathode Materials

Fabrication, Characterization, and Modulation of Functional Nanolayers

Contact Info

Product

Resources

About

Na0.67Mn1−xMgxO2 (0 ≤ x ≤ 0.2): a high capacity cathode for sodium-ion batteries

Abstract: Earth-abundant Na0.67[Mn1−xMgx]O2 (0 ≤ x ≤ 0.2) cathode materials with the P2 structure have been synthesized as positive electrodes for sodium-ion batteries.

Cited by 425 publications

References 24 publications

NaFe3(HPO3)2((H,F)PO2OH)6: A Potential Cathode Material and a Novel Ferrimagnet

NaFe3(HPO3)2((H,F)PO2OH)6: A Potential Cathode Material and a Novel Ferrimagnet

Review—Manganese-Based P2-Type Transition Metal Oxides as Sodium-Ion Battery Cathode Materials

Fabrication, Characterization, and Modulation of Functional Nanolayers

Contact Info

Product

Resources

About

Na_0.67Mn_1−xMg_xO₂ (0 ≤ x ≤ 0.2): a high capacity cathode for sodium-ion batteries

NaFe₃(HPO₃)₂((H,F)PO₂OH)₆: A Potential Cathode Material and a Novel Ferrimagnet

NaFe₃(HPO₃)₂((H,F)PO₂OH)₆: A Potential Cathode Material and a Novel Ferrimagnet