A mixed iron–manganese based pyrophosphate cathode, Na2Fe0.5Mn0.5P2O7, for rechargeable sodium ion batteries

Shakoor, R. A.; Park, Chan Sun; Raja, Arsalan Ahmad; Shin, Jaeho; Kahraman, Ramazan

doi:10.1039/c5cp06836c

Cited by 51 publications

(33 citation statements)

References 30 publications

(43 reference statements)

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Section: Recent Advances In Polyanion‐type Electrode Materials For Namentioning

confidence: 99%

“…However, Na 2 MnP 2 O 7 has been shown to have an inferior rate capability due to the intrinsic lower electronic conductivity of Mn 69. Therefore, a mixed transition metal pyrophosphate material, Na 2 Fe 0.5 Mn 0.5 P 2 O 7 , was synthesized by substituting some Mn with Fe 71. Ex situ XRD and cyclic voltammetry (CV) analyses indicated that Na 2 Fe 0.5 Mn 0.5 P 2 O 7 is a single‐phase reaction due to different Na site occupancy as compared to the biphasic reaction of Na 2 FeP 2 O 7 and Na 2 MnP 2 O 7 .…”

Section: Recent Advances In Polyanion‐type Electrode Materials For Namentioning

confidence: 99%

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Polyanion‐Type Electrode Materials for Sodium‐Ion Batteries

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Sodium‐ion batteries, representative members of the post‐lithium‐battery club, are very attractive and promising for large‐scale energy storage applications. The increasing technological improvements in sodium‐ion batteries (Na‐ion batteries) are being driven by the demand for Na‐based electrode materials that are resource‐abundant, cost‐effective, and long lasting. Polyanion‐type compounds are among the most promising electrode materials for Na‐ion batteries due to their stability, safety, and suitable operating voltages. The most representative polyanion‐type electrode materials are Na3V2(PO4)3 and NaTi2(PO4)3 for Na‐based cathode and anode materials, respectively. Both show superior electrochemical properties and attractive prospects in terms of their development and application in Na‐ion batteries. Carbonophosphate Na3MnCO3PO4 and amorphous FePO4 have also recently emerged and are contributing to further developing the research scope of polyanion‐type Na‐ion batteries. However, the typical low conductivity and relatively low capacity performance of such materials still restrict their development. This paper presents a brief review of the research progress of polyanion‐type electrode materials for Na‐ion batteries, summarizing recent accomplishments, highlighting emerging strategies, and discussing the remaining challenges of such systems.

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Section: Recent Advances In Polyanion‐type Electrode Materials For Namentioning

confidence: 99%

Section: Recent Advances In Polyanion‐type Electrode Materials For Namentioning

confidence: 99%

Polyanion‐Type Electrode Materials for Sodium‐Ion Batteries

et al. 2017

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“…For example, carbon nanotubes decorated Na 2 FeP 2 O 7 was demonstrated to have a high rate capability at 20 C rate,166 and can work well in inorganic ionic liquid 167, 168. Due to the higher electrochemically active Mn 3+ /Mn 2+ redox potential, Manganese substitution were also employed to raise the average redox potential up to 3.2 V 169, 170. Ex situ XRD and CV analyses indicated that Na 2 Fe 0.5 Mn 0.5 P 2 O 7 underwent a single phase reaction rather than a biphasic reaction due to different Na coordination environment and different Na sites occupancy 169.…”

Section: Pyrophosphate Materials For Na Storagementioning

confidence: 99%

“…Due to the higher electrochemically active Mn 3+ /Mn 2+ redox potential, Manganese substitution were also employed to raise the average redox potential up to 3.2 V 169, 170. Ex situ XRD and CV analyses indicated that Na 2 Fe 0.5 Mn 0.5 P 2 O 7 underwent a single phase reaction rather than a biphasic reaction due to different Na coordination environment and different Na sites occupancy 169. Recently, off‐stoichiometric iron‐based pyrophosphate, named Na 2–x Fe 1+x/2 P 2 O 7 , were reported To have similar structure and charge/discharge plateaus with Na 2 FeP 2 O 7 , but higher reversible capacity (114 mAh g –1 ) and better cyclability exceeding 3000 cycles in ionic liquid electrolyte 171, 172, 173, 174, 175…”

Section: Pyrophosphate Materials For Na Storagementioning

confidence: 99%

Phosphate Framework Electrode Materials for Sodium Ion Batteries

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Sodium ion batteries (SIBs) have been considered as a promising alternative for the next generation of electric storage systems due to their similar electrochemistry to Li‐ion batteries and the low cost of sodium resources. Exploring appropriate electrode materials with decent electrochemical performance is the key issue for development of sodium ion batteries. Due to the high structural stability, facile reaction mechanism and rich structural diversity, phosphate framework materials have attracted increasing attention as promising electrode materials for sodium ion batteries. Herein, we review the latest advances and progresses in the exploration of phosphate framework materials especially related to single‐phosphates, pyrophosphates and mixed‐phosphates. We provide the detailed and comprehensive understanding of structure–composition–performance relationship of materials and try to show the advantages and disadvantages of the materials for use in SIBs. In addition, some new perspectives about phosphate framework materials for SIBs are also discussed. Phosphate framework materials will be a competitive and attractive choice for use as electrodes in the next‐generation of energy storage devices.

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“…[154] Mixed-cation pyrophosphates have been also developed with the aim of obtaining enhanced electrochemical performance, especially in cycling stability. [155,156] …”

Section: Pyrophosphatesmentioning

confidence: 99%

Advanced Cathode Materials for Sodium‐Ion Batteries: What Determines Our Choices?

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lithium with cheaper alternatives might make future batteries less susceptible to price fluctuations when the market expands. [5] This concern has in turn spawned a flurry of research activity to look beyond LIB technology. In view of the various rechargeable batteries, sodiumion batteries (SIBs) that consist of a main element of seawater made their presence felt in the battery industry due to their chemical similarity (e.g., only 0.3 V more positive than lithium) but higher abundance compared to lithium, [6] as illustrated in Table 1. SIBs work in the same way as LIBs in that they involve the reversible migration of cations/anions across a separator toward the electrodes to realize voltage-driven electrochemical reactions. [7] The upward trend for sodium-ion battery research is driven by the concern over the scarcity and price rise of lithium. Hence, these major merits, as well as the suitable redox potential (E = 0.3 V vs Li) make the SIB an appropriate choice as a rechargeable battery system.In fact, SIBs started almost in parallel with LIBs in the 1980s but the development of LIBs eventually eclipsed SIBs due to the electrochemical performances of SIBs. [8,9] A major obstacle is that it is difficult to get a sodium host material with comparable operating voltage and capacity as the LIB analogs. Firstly, the larger Na + radius (0.98 Å) than that of Li + (0.69 Å) leads to the kinetically sluggish Na + insertion/extraction and transport cross the host-material framework, which will always make the specific capacity and rate capacity largely degraded. [10] Secondly, the larger volume expansion caused by Na + insertion will also bring a change in the phase and lattice of the host materials, making it difficult to achieve a favorable electrochemical stability compared with the LIB counterparts. [11] In addition, they also suffer from a lower specific energy than LIBs, due to the lower potential and larger atomic weight of sodium. It is still a challenge to build an affordable Na-host materials endowed with a high specific energy (e.g., 500 W h kg −1 in LIBs). [12] Recently, the topic of SIBs was revisited in the hope of exploring possible ways to overcome the concerns about the low energy density and poor cycling life of SIBs.In spite of the above distinct drawbacks, SIBs can actually behave slightly differently in some chemical aspects. For instance, sodium does not react with aluminum, which is contrary to the alloying tendency of lithium. In the commercial market, manufacturers could appreciate this "inertness" to reduce the production cost of batteries by substituting the Among the various energy solutions, lithium-ion batteries (LIBs) play an important role in the process of the transition from fossil fuels to renewables. However, the necessity to replace lithium with cheaper alternatives due to its scarcity has recently attracted great interest to developing sodium-ion batteries (SIBs). Hence, the discovery and development of suitable cathode materials that exhibit high specific capacity, good cycling stabil...

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A mixed iron–manganese based pyrophosphate cathode, Na₂Fe_0.5Mn_0.5P₂O₇, for rechargeable sodium ion batteries

Cited by 51 publications

References 30 publications

Polyanion‐Type Electrode Materials for Sodium‐Ion Batteries

Polyanion‐Type Electrode Materials for Sodium‐Ion Batteries

Phosphate Framework Electrode Materials for Sodium Ion Batteries

Advanced Cathode Materials for Sodium‐Ion Batteries: What Determines Our Choices?

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