High Rate Capability and Enhanced Cyclability of Na3V2(PO4)2F3 Cathode by In Situ Coating of Carbon Nanofibers for Sodium‐Ion Battery Applications

Zhao, Jing; Gao, Yu; Liu, Qiang; Meng, Xing; Chen, Nan; Wang, Chunzhong; Du, Fei; Chen, Gang

doi:10.1002/chem.201704131

Cited by 40 publications

(20 citation statements)

References 43 publications

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“…Among them, in situ carbon nanofibers coating on Na 3 V 2 (PO 4 ) 2 F 3 @C (NVPF@C) particles were obtained through chemical vapor deposition (CVD) by using Fe as the catalyst. The optimum ratio of NVPF@C to Fe was 5:100 [127]. The corresponding cathode tested at 20C over 5000 cycles delivered a capacity of 93.3 mA•h•g −1 with a capacity retention of 86.3% at more than 99.5% coulombic efficiency.…”

Section: Polyanionic Compoundsmentioning

confidence: 99%

“…After 5000 cycles at 50C rate, the capacity was 62 mA·h·g −1 , which corresponds to a retention of 65%. Following this result, many works synthesized Na 3 V 2 (PO 4 ) 2 F 3 @C compounds using other forms of carbon, including graphene, carbon nanofibers, and carbon nanotubes [ 123 , 124 , 125 , 126 , 127 , 128 ]. All of them demonstrated very good rate capability.…”

Section: Cathode Materialsmentioning

confidence: 99%

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State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Mauger

Julien

2020

Materials

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Sodium-ion batteries (SIBs) were investigated as recently as in the seventies. However, they have been overshadowed for decades, due to the success of lithium-ion batteries that demonstrated higher energy densities and longer cycle lives. Since then, the witness a re-emergence of the SIBs and renewed interest evidenced by an exponential increase of the publications devoted to them (about 9000 publications in 2019, more than 6000 in the first six months this year). This huge effort in research has led and is leading to an important and constant progress in the performance of the SIBs, which have conquered an industrial market and are now commercialized. This progress concerns all the elements of the batteries. We have already recently reviewed the salts and electrolytes, including solid electrolytes to build all-solid-state SIBs. The present review is then devoted to the electrode materials. For anodes, they include carbons, metal chalcogenide-based materials, intercalation-based and conversion reaction compounds (transition metal oxides and sulfides), intermetallic compounds serving as functional alloying elements. For cathodes, layered oxide materials, polyionic compounds, sulfates, pyrophosphates and Prussian blue analogs are reviewed. The electrode structuring is also discussed, as it impacts, importantly, the electrochemical performance. Attention is focused on the progress made in the last five years to report the state-of-the-art in the performance of the SIBs and justify the efforts of research.

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Section: Polyanionic Compoundsmentioning

confidence: 99%

Section: Cathode Materialsmentioning

confidence: 99%

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Mauger

Julien

2020

Materials

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“…Progressively, the performance of the full cell can be significantly improved by combining Na 3 V 2 (PO 4 ) 2 F 3 with carbon nanofibers. At 5 C, a capacity of ≈95 mA h g −1 with a capacity retention of 64% after 1000 cycles can be achieved . Besides HC, other paired anode materials have also been properly explored, such as α‐Sn 2 P 2 O 7 and NaTi 2 (PO 4 ) 3 .…”

Section: Recent Achievements On Sifcsmentioning

confidence: 99%

Nonaqueous Sodium‐Ion Full Cells: Status, Strategies, and Prospects

Niu

Yin

Guo

2019

Small

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With ever‐increasing efforts focused on basic research of sodium‐ion batteries (SIBs) and growing energy demand, sodium‐ion full cells (SIFCs), as unique bridging technology between sodium‐ion half‐cells (SIHCs) and commercial batteries, have attracted more and more interest and attention. To promote the development of SIFCs in a better way, it is essential to gain a systematic and profound insight into their key issues and research status. This Review mainly focuses on the interface issues, major challenges, and recent progresses in SIFCs based on diversified electrolytes (i.e., nonaqueous liquid electrolytes, quasi‐solid‐state electrolytes, and all‐solid‐state electrolytes) and summarizes the modification strategies to improve their electrochemical performance, including interface modification, cathode/anode matching, capacity ratio, electrolyte optimization, and sodium compensation. Outlooks and perspectives on the future research directions to build better SIFCs are also provided.

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“…Extensive studies have yielded small improvements in the Coulombic efficiency and cyclability of NVPF through material modifications such as carbon coating, element doping, inserting conductive material, and electrolyte modifications (Table S1, Supporting Information) in attempts to boost its practicality. [ 24–42 ] Nonetheless, the identification of feasible electrolyte materials remains the most promising route to improve NVPF performance.…”

Section: Introductionmentioning

confidence: 99%

Electrolytes toward High‐Voltage Na₃V₂(PO₄)₂F₃ Positive Electrode Durable against Temperature Variation

Hwang

Matsumoto

Hagiwara

2020

Advanced Energy Materials

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High power and energy density, long cyclability, and tolerance for wide temperature (seasonal and daily operational temperature differences) must be considered to construct large‐scale sodium secondary batteries. In this regard, Na3V2(PO4)2F3 (NVPF) has become a subject of interest as a high‐performance positive electrode material owing to its high energy density. However, the high operating voltage of NVPF causes continuous decomposition of electrolytes during cycles, resulting in significant capacity fading and low Coulombic efficiency. In this study, the electrochemical performance of the NVPF electrode in organic solvent electrolytes with and without additives and an ionic liquid is investigated at high voltage regimes over a wide temperature range (−20 °C to 90 °C). The results reveal that the performance of organic electrolytes is still insufficient even with additives, and the ionic liquid electrolyte demonstrates high electrochemical stability and cyclability with NVPF electrodes over a temperature range from −20 °C to 90 °C, achieving stable cycling over 500 cycles. The detailed electrochemical analysis combined with X‐ray photoelectron and energy dispersive X‐ray spectroscopy indicates that a sturdy cathode electrolyte interphase layer around the electrode protects it from capacity fading at high voltage and elevated temperature, resulting in high Coulombic efficiency.

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High Rate Capability and Enhanced Cyclability of Na₃V₂(PO₄)₂F₃ Cathode by In Situ Coating of Carbon Nanofibers for Sodium‐Ion Battery Applications

Cited by 40 publications

References 43 publications

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Nonaqueous Sodium‐Ion Full Cells: Status, Strategies, and Prospects

Electrolytes toward High‐Voltage Na₃V₂(PO₄)₂F₃ Positive Electrode Durable against Temperature Variation

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High Rate Capability and Enhanced Cyclability of Na3V2(PO4)2F3 Cathode by In Situ Coating of Carbon Nanofibers for Sodium‐Ion Battery Applications

Cited by 40 publications

References 43 publications

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

State-of-the-Art Electrode Materials for Sodium-Ion Batteries

Nonaqueous Sodium‐Ion Full Cells: Status, Strategies, and Prospects

Electrolytes toward High‐Voltage Na3V2(PO4)2F3 Positive Electrode Durable against Temperature Variation

Contact Info

Product

Resources

About

High Rate Capability and Enhanced Cyclability of Na₃V₂(PO₄)₂F₃ Cathode by In Situ Coating of Carbon Nanofibers for Sodium‐Ion Battery Applications

Electrolytes toward High‐Voltage Na₃V₂(PO₄)₂F₃ Positive Electrode Durable against Temperature Variation