Carbon-coating-increased working voltage and energy density towards an advanced Na3V2(PO4)2F3@C cathode in sodium-ion batteries

Gu, Zhen‐Yi; Guo, Jin‐Zhi; Sun, Zhonghui; Zhao, Xinxin; Li, Wenhao; Yang, Xu; Liang, Hao‐Jie; Zhao, Chen‐De; Wu, Xing‐Long

doi:10.1016/j.scib.2020.01.018

Cited by 222 publications

(91 citation statements)

References 62 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…[5] Unfortunately,t he issue of separators in Na batteries has been long neglected. To enable ah igh dissolution of Na salts that provides sufficient ionic conductivity,ahigh content of cyclic carbonate solvents with high dielectric constants,s uch as ethylene carbonate (EC) and propylene carbonate (PC), are widely applied in LEs.F or example,abinary EC:PC mixture is considered as uitable solvent formulation for Na-ion batteries, [6] and ab inary PC:fluoroethylene carbonate (FEC) solvent system enables stable cycling of room-temperature Na-S batteries. [7] However,s uch cyclic carbonates are unable to wet the hydrophobic polyolefin separators that are commercially used in LIBs (with at hickness of < 30 mma nd nanoscale pore sizes).…”

Section: Introductionmentioning

confidence: 99%

Polyolefin‐Based Janus Separator for Rechargeable Sodium Batteries

et al. 2020

View full text Add to dashboard Cite

Rechargeable sodium batteries are a promising technology for low‐cost energy storage. However, the undesirable drawbacks originating from the use of glass fiber membrane separators have long been overlooked. A versatile grafting–filtering strategy was developed to controllably tune commercial polyolefin separators for sodium batteries. The as‐developed Janus separators contain a single–ion‐conducting polymer‐grafted side and a functional low‐dimensional material coated side. When employed in room‐temperature sodium–sulfur batteries, the poly(1‐[3‐(methacryloyloxy)propylsulfonyl]‐1‐(trifluoromethanesulfonyl)imide sodium)‐grafted side effectively enhances the electrolyte wettability, and inhibits polysulfide diffusion and sodium dendrite growth. Moreover, a titanium‐deficient nitrogen‐containing MXene‐coated side electrocatalytically improved the polysulfide conversion kinetics. The as‐developed batteries demonstrate high capacity and extended cycling life with lean electrolyte loading.

show abstract

Section: Introductionmentioning

confidence: 99%

Polyolefin‐Based Janus Separator for Rechargeable Sodium Batteries

et al. 2020

View full text Add to dashboard Cite

show abstract

“…[40] Another typical and common method is composing the active materials with electronically conductive substances (e. g. carbon, graphene). [41][42][43][44] Therefore, many kinds of nanosized and carbon modified Na 2 FeP 2 O 7 materials have been developed as cathode for SIBs, such as, Na 2 FeP 2 O 7 @C nanocomposite, [45] Na 2 FeP 2 O 7 /graphene, [46] and Na 2 FeP 2 O 7 /carbon nanotubes . [47] Apparently, due to the special composite structure, the electrochemical performances of these cathodes are distinctly enhanced.…”

Section: Introductionmentioning

confidence: 99%

A Scalable Approach to Na₂FeP₂O₇@Carbon/Expanded Graphite as a Low‐Cost and High‐Performance Cathode for Sodium‐Ion Batteries

Zeng

et al. 2020

ChemElectroChem

View full text Add to dashboard Cite

Sodium-ion batteries (SIBs) are the most promising candidates as alternatives to lithium-ion batteries (LIBs), owing to the natural abundance of sodium salt and the low cost. However, the commercial application of SIBs is principally hampered by the absence of suitable cathode materials. Herein, a novel Na 2 FeP 2 O 7 @carbon/expanded graphite (NFPO@C/EG) composite with a unique microstructure was developed through a scalable sol-gel process followed by a ball-milling procedure with expanded graphite. Benefiting from the multiscale carbonmodified structure, the NFPO@C/EG effectively improves the electronic conductivity and, at the same time, shortens the path of sodium ion transmission. As a consequence, the NFPO@C/EG cathode presents a much higher specific capacity and more stable cycling stability than NFPO@C and NFPO. The unique design of NFPO@C/EG endows a high ratio of pseudocapacitance contribution and a large Na + diffusion coefficient. As a consequence, the NFPO@C/EG cathode displays stable cycle performance (82 mAh g À 1 over 400 cycles at 232 mA g À 1) and superior rate capability (60 mAh g À 1 at a high charge/discharge density of 2320 mA g À 1). This multiscale carbon-modified design concept builds an avenue for the practical application of polyanionic cathode materials and promotes the development of low-cost SIBs.

show abstract

“…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: Polyanionic Compoundsmentioning

confidence: 96%

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

Mauger

Julien

2020

Materials

View full text Add to dashboard Cite

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.

show abstract

Carbon-coating-increased working voltage and energy density towards an advanced Na3V2(PO4)2F3@C cathode in sodium-ion batteries

Cited by 222 publications

References 62 publications

Polyolefin‐Based Janus Separator for Rechargeable Sodium Batteries

Polyolefin‐Based Janus Separator for Rechargeable Sodium Batteries

A Scalable Approach to Na₂FeP₂O₇@Carbon/Expanded Graphite as a Low‐Cost and High‐Performance Cathode for Sodium‐Ion Batteries

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

Contact Info

Product

Resources

About

Carbon-coating-increased working voltage and energy density towards an advanced Na3V2(PO4)2F3@C cathode in sodium-ion batteries

Cited by 222 publications

References 62 publications

Polyolefin‐Based Janus Separator for Rechargeable Sodium Batteries

Polyolefin‐Based Janus Separator for Rechargeable Sodium Batteries

A Scalable Approach to Na2FeP2O7@Carbon/Expanded Graphite as a Low‐Cost and High‐Performance Cathode for Sodium‐Ion Batteries

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

Contact Info

Product

Resources

About

A Scalable Approach to Na₂FeP₂O₇@Carbon/Expanded Graphite as a Low‐Cost and High‐Performance Cathode for Sodium‐Ion Batteries