Structure and Stability of Sodium Intercalated Phases in Olivine FePO<sub>4</sub>

Moreau, Philippe; Guyomard, Dominique; Gaubicher, Joël; Boucher, Florent

doi:10.1021/cm101377h

Cited by 477 publications

(502 citation statements)

References 21 publications

Supporting

Mentioning

462

Contrasting

Unclassified

Order By: Relevance

“…Moreover, when the temperature reaches 500°C, the material transforms in □ 0.5 Na 1.5 Mn 1.5 Fe 1.5 (PO 4 ) 3 isostructural alluaudite [26], which is the most stable compound of this group until 1000°C and beyond. This behavior justifies the high thermal stability of this NMFP cathode materials and it is in a good agreement with high thermal stability of iron phosphate compounds [30]. This parameter is an additional crucial behavior that qualifies NMFP as a suitable candidate for Na and Li cathode materials.…”

Section: Fig 5 Displays Typical Thermogravimetric (Tg) and Differentialsupporting

confidence: 80%

One-step hydrothermal synthesis and electrochemical performance of sodium-manganese-iron phosphate as cathode material for Li-ion batteries

Karegeya

Mahmoud

Vertruyen

et al. 2017

Journal of Solid State Chemistry

View full text Add to dashboard Cite

A B S T R A C TThe sodium-manganese-iron phosphate Na 2 Mn 1.5 Fe 1.5 (PO 4 ) 3 (NMFP) with alluaudite structure was obtained by a one-step hydrothermal synthesis route. The physical properties and structure of this material were obtained through XRD and Mössbauer analyses. X-ray diffraction Rietveld refinements confirm a cationic distribution of Na + and presence of vacancies in A(2)', Na + and small amounts of Mn 2+ in A(1), Mn 2+ in M(1), 0.5 Mn 2+ and Fe cations (Mn 2+ ,Fe 2+ and Fe 3+ ) in M(2), leading to the structural formula Na 2 Mn(Mn 0.5 Fe 1.5 ) (PO 4 ) 3 . The particles morphology was investigated by SEM. Several reactions with different hydrothermal reaction times were attempted to design a suitable synthesis protocol of NMFP compound. The time of reaction was varied from 6 to 48 h at 220°C. The pure phase of NMFP particles was firstly obtained when the hydrothermal reaction of NMFP precursors mixture was maintained at 220°C for 6 h. When the reaction time was increased from 6 to 12, 24 and 48 h, the dandelion structure was destroyed in favor of NMFP micro-rods. The combination of NMFP (NMFP-6H, NMFP-12H, NMFP-24H and NMFP-48H) structure refinement and Mössbauer characterizations shows that the increase of the reaction time leads to the progressive increment of Fe(III) and the decrease of the crystal size. The electrochemical tests indicated that NMFP is a 3 V sodium intercalating cathode. The comparison of the discharge capacity evolution of studied NMFP electrode materials at C/5 current density shows different capacities of 48, 40, 34 and 34 mA h g −1 for NMFP-6H, NMFP-12H, NMFP-24H and NMFP-48H respectively. Interestingly, all samples show excellent capacity retention of about 99% during 50 cycles.

show abstract

Section: Fig 5 Displays Typical Thermogravimetric (Tg) and Differentialsupporting

confidence: 80%

One-step hydrothermal synthesis and electrochemical performance of sodium-manganese-iron phosphate as cathode material for Li-ion batteries

Karegeya

Mahmoud

Vertruyen

et al. 2017

Journal of Solid State Chemistry

View full text Add to dashboard Cite

show abstract

“…[76,95] Notably,r esearchers also predicted similar phases for related oli- www.chemsuschem.org vine-type electrodes during charging/discharging. [95a] Am ajor structurald ifferencea ppeared during charginga nd discharging:o nc harging there was as equence of two two-phase reactions, whereas on discharging three phases appeared simultaneously in the ex situ XRPD data.…”

Section: Structural Changes During Cycling and Electrochemical Performentioning

confidence: 95%

“…This insighti sv ery powerful in sodium-ion battery electrodes because the major issues with positive electrodes are the amount of sodium that can be reversibly inserted/extracted and the number of major structurald istortions that occur during the insertion/extraction process. Specifically,s ome cathodes under study include Na x CoO 2 , [73] Na x MnO 2 , [74] Na x CrO 2 , [75] Na x FePO 4 , [76] Na x M 2 (XO 4 ) 3 , and variousc ompositions in the Na x M 2 O 2y (PO 4 ) 2 F 3Ày series,i n which M = V, Fe, Co, Mn, and Ni and X = Si, P, S, and Mo. [8,77] To Figure 17.…”

Section: Sodium-based Batteriesmentioning

confidence: 99%

“…a) An image of the molten-salt sodium battery,b )the internal schematic,c )a nd d) tomographic imageso ft he battery,e)the gauge volumes for NPD studies, and f) the resulting NPD patterns. [70a] date, an umber of in situ XRD experiments have been carried out, but theseh ave focusedo ni nsertion/extraction reactions under equilibrium or low-current conditions [73,74,76,78] and typically avoid time-resolvedi nfluences. The cellsu sed are often based on coin cells with either electrodes spread on the current collector or as pellets.…”

Section: Sodium-based Batteriesmentioning

confidence: 99%

See 1 more Smart Citation

In Situ Powder Diffraction Studies of Electrode Materials in Rechargeable Batteries

et al. 2015

View full text Add to dashboard Cite

The ability to directly track the charge carrier in a battery as it inserts/extracts from an electrode during charge/discharge provides unparalleled insight for researchers into the working mechanism of the device. This crystallographic-electrochemical information can be used to design new materials or modify electrochemical conditions to improve battery performance characteristics, such as lifetime. Critical to collecting operando data used to obtain such information insitu while a battery functions are X-ray and neutron diffractometers with sufficient spatial and temporal resolution to capture complex and subtle structural changes. The number of operando battery experiments has dramatically increased in recent years, particularly those involving neutron powder diffraction. Herein, the importance of structure-property relationships to understanding battery function, why insitu experimentation is critical to this, and the types of experiments and electrochemical cells required to obtain such information are described. For each battery type, selected research that showcases the power of insitu and operando diffraction experiments to understand battery function is highlighted and future opportunities for such experiments are discussed. The intention is to encourage researchers to use insitu and operando techniques and to provide a concise overview of this area of research.Keywords situ, batteries, diffraction, studies, powder, electrode, materials, rechargeable Disciplines Engineering | Science and Technology Studies Publication DetailsSharma, N., Pang, W. Kong., Guo, Z. & Peterson, V. K. (2015). In situ powder diffraction studies of electrode materials in rechargeable batteries. ChemSusChem: chemistry and sustainability, energy and materials, 8 (17), 2826-2853. This journal article is available at Research Online: http://ro.uow.edu.au/eispapers/4279 In Situ Powder Diffraction Studies of Electrode Materials in Rechargeable BatteriesNeerajS harma,* [a] Wei Kong Pang, [b, c] Zaiping Guo, [c] and Vanessa K. Peterson [b] ChemSusChem 2015, 8,2826 -2853 2 015 Wiley-VCH Verlag GmbH &Co. KGaA, Weinheim 2826 Reviews DOI:1 0.1002/cssc.201500152 Batteries and Energy StorageIncreasingw orldwide need for energy is depleting our main energy sources, including fossil fuels such as coal, petroleum, and natural gas. Concurrently,t he combustion of fossil fuels is increasing harmful greenhouse gas emissionsa nd other environmentalp ollutants. Renewable ands ustainable energy is required to solve such problems. To enabler enewable energy, energy conversion and storage systems are essential to smooth out the intermittent nature of generation. There are an umber of energy-conversion and storage systems (e.g.,f lywheels), but lithium-ion rechargeable batteries are proving to be the dominantr echargeableb attery system. This is because of their high energy density,h igh power density,a nd higher operating voltage comparedw ith other rechargeable batteries, such as lead-acid and widely used nickel-metal-hybrid batteri...

show abstract

“…[59][60][61] Unlike LiMPO 4 , NaMPO 4 tends to prefer the maricite structure, which is similar to the olivine structure but with the alkali and transition metal swapping atomic positions. 62 However, the maricite structure is uninteresting for battery applications given the lack of viable alkali diffusion pathways in the structure.…”

Section: Polyanion Oxidesmentioning

confidence: 99%

Computational studies of solid-state alkali conduction in rechargeable alkali-ion batteries

Deng

Ong

2016

NPG Asia Mater

View full text Add to dashboard Cite

The facile conduction of alkali ions in a crystal host is of crucial importance in rechargeable alkali-ion batteries, the dominant form of energy storage today. In this review, we provide a comprehensive survey of computational approaches to study solid-state alkali diffusion. We demonstrate how these methods have provided useful insights into the design of materials that form the main components of a rechargeable alkali-ion battery, namely the electrodes, superionic conductor solid electrolytes and interfaces. We will also provide a perspective on future challenges and directions. The scope of this review includes the monovalent lithium-and sodium-ion chemistries that are currently of the most commercial interest. NPG Asia Materials (2016) 8, e254; doi:10.1038/am.2016.7; published online 25 March 2016 INTRODUCTIONThe facile conduction of alkali ions in a crystal is of critical importance in energy storage. Today, the dominant form of energy storage in consumer electronics is the rechargeable lithium-ion (Li-ion) battery, 1-5 a device that functions entirely on the basis of the reversible transport of Li + ions. With one of the highest energy densities of known energy storage technologies, Li-ion batteries are finding increasingly large-scale applications in electrified transportation and grid storage. In recent years, there has also been a resurgence of interest in rechargeable sodium-ion (Na-ion) batteries, 6-12 which function on the same basic principle but with Na + instead of Li + because of concerns regarding the abundance and cost of lithium. Figure 1 shows a representation of a rechargeable alkali-ion battery. The typical electrode in an alkali-ion battery is an intercalation compound, which, as the name implies, stores alkali ions by inserting them into its crystal structure in a topotactic manner. During discharge, A + ions are transported from the anode, through the electrolyte and into the cathode. The reverse happens during charge. Throughout this review, we will adopt the customary terminology of defining the 'cathode' as the positive electrode during discharge, even though the formal definition of the cathode changes depending on whether the charging or discharging process is being referred to. Current cathodes are typically transition metal oxides, and the insertion/removal of each A + in the cathode is accompanied by the concomitant reduction/oxidation of a transition metal ion to accommodate the compensating insertion/removal of an electron. Graphitic carbon is the most common anode.The performance of a rechargeable alkali-ion battery depends crucially on the ease with which alkali ions move in the host crystal of the cathode and anode, in the electrolyte, and in the electrodeelectrolyte interface. Poor alkali transport in any part of the battery

show abstract

Structure and Stability of Sodium Intercalated Phases in Olivine FePO₄

Abstract: International audienc

Cited by 477 publications

References 21 publications

One-step hydrothermal synthesis and electrochemical performance of sodium-manganese-iron phosphate as cathode material for Li-ion batteries

One-step hydrothermal synthesis and electrochemical performance of sodium-manganese-iron phosphate as cathode material for Li-ion batteries

In Situ Powder Diffraction Studies of Electrode Materials in Rechargeable Batteries

Computational studies of solid-state alkali conduction in rechargeable alkali-ion batteries

Contact Info

Product

Resources

About

Structure and Stability of Sodium Intercalated Phases in Olivine FePO4

Abstract: International audienc

Cited by 477 publications

References 21 publications

One-step hydrothermal synthesis and electrochemical performance of sodium-manganese-iron phosphate as cathode material for Li-ion batteries

One-step hydrothermal synthesis and electrochemical performance of sodium-manganese-iron phosphate as cathode material for Li-ion batteries

In Situ Powder Diffraction Studies of Electrode Materials in Rechargeable Batteries

Computational studies of solid-state alkali conduction in rechargeable alkali-ion batteries

Contact Info

Product

Resources

About

Structure and Stability of Sodium Intercalated Phases in Olivine FePO₄