Synthesis of carbon coated Na2FePO4F as cathode materials for high-performance sodium ion batteries

Ling, Rui; Cai, Shu; Shen, Sibo; Hu, Xudong; Xie, Dongli; Zhang, Feiyang; Sun, Xiaohong; Yu, Nian; Wang, Fengwu

doi:10.1016/j.jallcom.2017.02.075

Cited by 44 publications

(26 citation statements)

References 45 publications

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“…In operando XRD analysis indicated that a “quasi‐solid‐solution” behavior corresponds to the transition from Na 2 FePO 4 F → Na 1.5 FePO 4 F → NaFePO 4 F and that all the active Na + ions are situated at the Na2 site (Figure e,f) . The sodium storage performance of Na 2 FePO 4 F was greatly optimized by some groups . Recently, Dunn and co‐workers constructed a Na 2 FePO 4 F/C electrode that exhibited outstanding cycling stability with 70% capacity retention over 5000 cycles (Figure g) …”

Section: Cathode Materialsmentioning

confidence: 99%

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Recent Progress in Iron‐Based Electrode Materials for Grid‐Scale Sodium‐Ion Batteries

Fang

Chen

Xiao

et al. 2018

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Grid-scale energy storage batteries with electrode materials made from low-cost, earth-abundant elements are needed to meet the requirements of sustainable energy systems. Sodium-ion batteries (SIBs) with iron-based electrodes offer an attractive combination of low cost, plentiful structural diversity and high stability, making them ideal candidates for grid-scale energy storage systems. Although various iron-based cathode and anode materials have been synthesized and evaluated for sodium storage, further improvements are still required in terms of energy/power density and long cyclic stability for commercialization. In this Review, progress in iron-based electrode materials for SIBs, including oxides, polyanions, ferrocyanides, and sulfides, is briefly summarized. In addition, the reaction mechanisms, electrochemical performance enhancements, structure-composition-performance relationships, merits and drawbacks of iron-based electrode materials for SIBs are discussed. Such iron-based electrode materials will be competitive and attractive electrodes for next-generation energy storage devices.

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Section: Cathode Materialsmentioning

confidence: 99%

Section: Cathode Materialsmentioning

confidence: 99%

Recent Progress in Iron‐Based Electrode Materials for Grid‐Scale Sodium‐Ion Batteries

Fang

Chen

Xiao

et al. 2018

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157

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“…The combination of highly electronegative F‐ions and phosphates results in a new class of covalent polyanionic frameworks with a higher voltage for the active redox couple due to the strong inductive effect of the fluorine element. Recently, nanosized carbon‐coated Na 2 FePO 4 F (Na 2 FePO 4 F/C) were successfully prepared by Ling et al In addition to the improvement in electronic conductivity, the samples after the carbon coating process showed a larger specific surface area and a higher sodium‐ion diffusion coefficient. Thus, an initial discharge capacity of 114.3 mA h g −1 at 0.1 C and high capacity retention of 93.3% after 100 cycles were obtained.…”

Section: Nanocomposites For Cathodes Of the Sodium‐ion Batteriesmentioning

confidence: 99%

Nanocomposite Materials for the Sodium–Ion Battery: A Review

Liang

Lai

Miao

et al. 2017

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Clean energy has become an important topic in recent decades because of the serious global issues related to the development of energy, such as environmental contamination, and the intermittence of the traditional energy sources. Creating new battery-related energy storage facilities is an urgent subject for human beings to address and for solutions for the future. Compared with lithium-based batteries, sodium-ion batteries have become the new focal point in the competition for clean energy solutions and have more potential for commercialization due to the huge natural abundance of sodium. Nevertheless, sodium-ion batteries still exhibit some challenges, like inferior electrochemical performance caused by the bigger ionic size of Na ions, the detrimental volume expansion, and the low conductivity of the active materials. To solve these issues, nanocomposites have recently been applied as a new class of electrodes to enhance the electrochemical performance in sodium batteries based on advantages that include the size effect, high stability, and excellent conductivity. In this Review, the recent development of nanocomposite materials applied in sodium-ion batteries is summarized, and the existing challenges and the potential solutions are presented.

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“…Following the historical timeline of material discovery, the fluorophosphates will be described first followed by various other mixed polyanionic sodium insertion materials. A comprehensive list of these mixed polyanionic materials along with their structural parameters and electrochemical activity is provided in Table 1 (and references therein) . In addition to the half‐cell activity, full cell implementation and electrocatalytic activity in selected mixed polyanionic insertion systems have been elucidated.…”

Section: Historical Overview Of Mixed Polyanionic Cathodesmentioning

confidence: 99%

“…While the fluorophosphate saga started with vanadium chemistry, the search for low cost and nontoxic chemistry led to the exploration of other earth‐abundant 3d metals‐based fluorophosphates. Employing highly ionic bonds and inductive effect, these fluorophosphates [Na 2 MPO 4 F, M = Fe, Co, Mn, Ni] can be attractive candidates for NIBs . In comparison to V‐based cathodes, several other 3d metals (e.g., Fe, Mn) have lower redox potential.…”

Section: Other 3d Metal‐based Fluorophosphatesmentioning

confidence: 99%

An Overview of Mixed Polyanionic Cathode Materials for Sodium‐Ion Batteries

Senthilkumar¹,

Murugesan²,

Sharma³

et al. 2018

Small Methods

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to battery driven (electric) mobility. While a multibillion-dollar industry has come up catering various needs, the manifold consumption of Li-based resources has led to steep price rise and concerns over future geo-political tension due to its nonuniform geographic distribution. To combat this imminent issue, various alternative battery chemistries (termed as "Beyond Li-ion batteries") are widely pursued, particularly to replace Li-ion batteries in applications unrestricted by gravimetric and/or volumetric energy density. In this case, sodium-ion batteries (NIBs) are touted as the emerging futuristic battery chemistry owing to the widespread availability of sodium-based resources and well-understood electrochemical operation involving the Na + charge carriers. [1][2][3][4][5] In the quest to build robust sodiumion batteries, various 2D layered transition metal oxides and 3D polyanionic framework materials have been unraveled. While the oxide cathodes can deliver high theoretical (and reversible) capacity, they suffer from lower redox potential owing to strong covalence nature. [6] It is more so acute in case of Na-ion batteries considering the higher potential of Na/Na + (−2.71 V vs normal hydrogen electrode (NHE)) vis-à-vis Li/Li + (−3.03 V vs NHE). This issue can be circumvented by implementing polyanionic cathode materials with tunable crystal structure, robust framework providing safe operation and higher redox potential due to inductive effect. [7,8] Following the inductive effect principle, plethora of cathodes with polyanionic units [(XO 4 ) m n− : X = B, P, Si, S, W, Mo, As, Ti, V, etc.] have been discovered both for Li-ion and Na-ion batteries. [9,10] Moving a step further with polyanionic chemistry, off late, materials discovery has been realized by using different types of polyanion units. These subclass of materials are known as "mixed polyanionic" cathode materials, which can be designed by simultaneously having i) polyanionic units [(XO 4 ) m n− , X = P, S, V, etc.] along with other single anions [Y − = F − /OH − /O 2− /N 3− ], ii) different structural units of same polyanion units [(XO m ) (X 2 O m ), e.g., PO 4 -P 2 O 7 , BO 3 -B 2 O 5 , SO 4 -S 2 O 3 , etc.], and iii) two different oxyanionic [(XO 4 ) m n− ] units (e.g., PO 4 -SO 4 , PO 4 -NO 3 , PO 4 -CO 3 , etc.) as illustrated in Figure 1. These polyanionic combinations can lead to rich structural diversity and multi ple electron redox activity leading to robust electrochemical "Building better batteries" remains an ongoing process to cater diverse energy demands starting from small-scale consumer electronics to large-scale automobiles and grid storage. While Li-ion batteries have carried this burden over the last three decades, the ever-growing and highly diverse applications (based on size, energy-density, and stationary vs mobile usages) have led to an era of "beyond lithium-ion batteries." In this postlithium-battery era, sodium-ion batteries (NIBs) have emerged as a pragmatic option particularly for large-scale applications. They attract...

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Synthesis of carbon coated Na2FePO4F as cathode materials for high-performance sodium ion batteries

Cited by 44 publications

References 45 publications

Recent Progress in Iron‐Based Electrode Materials for Grid‐Scale Sodium‐Ion Batteries

Recent Progress in Iron‐Based Electrode Materials for Grid‐Scale Sodium‐Ion Batteries

Nanocomposite Materials for the Sodium–Ion Battery: A Review

An Overview of Mixed Polyanionic Cathode Materials for Sodium‐Ion Batteries

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