Fluoroethylene carbonate as an additive in a carbonates-based electrolyte for enhancing the specific capacity of room-temperature sodium-sulfur cell

Zhao, Xiaomin; Zhu, Quan; Xu, Shoudong; Chen, Liang; Zuo, Zhijun; Wang, Xiaomin; Liu, Shibin; Zhang, Ding

doi:10.1016/j.jelechem.2018.11.021

Cited by 38 publications

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References 30 publications

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“…The initial galvanic curves of the YP50F/S electrode in different electrolytes at 0.1 C are shown in Figure S3c and d. The initial discharge capacity of YP50F/S cathode in different electrolyte discharge capacity of YP50F/S cathode in different electrolyte (2300, 2277, 2290 and 1939 mAh g −1 for 0,15, 20 and 25 wt.% TMP‐contained electrolytes, respectively) were higher than the theoretical specific capacity of Na‐S batteries (1675 mAh g −1 ), due to the high initial discharge specific capacity of YP50F carbon . In the second cycle (Figure S3d), the reversible capacities of YP50F/S cathode in 0, 15, 20, 25 wt.% TMP‐contained electrolytes were 972, 898, 818 and 418 mAh g −1 , respectively, with the maintenance of 899, 788, 642 and 407 mAh g −1 after 80 (or 50) cycles (Figure c).…”

Section: Figuresupporting

confidence: 90%

“…Figure a shows the fine S 2p spectra of YP50F/S electrode surface before and after the discharge in different electrolytes. The S 2p3/2 peaks are described to index sulfur species . The XPS for the pristine electrode exhibited the existence of C‐S‐C structure at 164.1 eV.…”

Section: Figuresupporting

confidence: 90%

“…Subsequently, 15, 20 and 25 wt.% TMP‐contained electrolytes were used in Na|electrolyte|YP50F/S cells to investigated the electrochemical properties between 0.1–3.0 V. The morphological and component information of YP50F and YP50F/S have been revealed in our recent paper, so they are not described here. In addition, previous research confirmed that 0.1–3.0 V is an optimized voltage range for our Na‐YP50F/S battery, in which the capacity of YP50F/S is higher and the effect of YP50F in total capacity is negligible after the first cycle . Figure S3a and b show the CV curves of the YP50F/S cathode in different electrolytes.…”

Section: Figurementioning

confidence: 99%

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Trimethyl Phosphate for Nonflammable Carbonate‐Based Electrolytes for Safer Room‐Temperature Sodium‐Sulfur Batteries

et al. 2019

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To address the safety concern for room-temperature sodiumsulfur batteries, such as fires easily triggered by organic electrolytes, an applicable non-flammable electrolyte formula was developed by introducing trimethyl phosphate (TMP) into 1.0 M NaClO 4 -ethylene carbonate/propylene carbonate electrolyte. It is demonstrated that the electrolyte containing 15 wt.% TMP was a optimized formula, exhibiting nonflammability, thermal stability, electrochemical compatibility and lasting cell performance. Using this optimized electrolyte formula, the sulfur cathode exhibited a stable capacity of 788 mAh g À 1 at a rate of 0.1 C and excellent rate capability of 441 and 177 mAh g À 1 for 200 cycles at rates of 1 C and 5 C, respectively. When the TMP content further increases to 25 wt.%, the specific capacity of batteries declined significantly due to unstable SEI. Our study can shed light on the development of flameretardant electrolyte for room-temperature sodium-sulfur or other batteries.Rechargeable Li-S batteries have attracted tremendous attention over the last decade, for the extremely high capacity (1675 mAh g À 1 ), natural abundance and environmental friendliness of elemental sulfur. However, due to insufficient industrial supply limited by extraction difficulty from natural lithium resources, it is meaningful to develop sodium-sulfur (Na-S) secondary batteries by utilizing the much cheaper and more available sodium as the charge carrier. Actually, the most classic Na-S battery, operated at around 300°C, has been investigated and successfully commercialized since 1960s. [1] However, its extensive use is restricted by serious potential security risks and low utilization of S caused by the high operating temperature. [2] To improve these deficiencies, room-temperature Na-S (RT Na-S) batteries have been developed since 2006. [3] One obstacle to develop high performance RT Na-S battery is the insulating nature of sulfur and Na 2 S, thus various highlyconducting materials, including multiwall carbon nanotubes (MWCNT), [4] carbon hollow sphere, [5] porous carbon, [6] carbonized metal-organic framework [7] and sulfurized polyacrylonitrile (PAN) [8] have been used as substrates. In addition, thanks to the complex three-dimensional structure, these hosts are also able to prevent loss of the soluble sodium polysulfides (NaPS), further suppressing the 'shuttle effect' and improving the electrochemical performance. Porous carbon become one of the best hosts because its high surface area and pore volume. [7b] Another decisive factor of electrochemical performance is electrolyte. Polymer electrolytes were used in early RT Na-S batteries, however, only low energy density and short cycle life were obtained due to the low ionic conductivity of polymer electrolyte at room temperature. [3,9] Ether-based electrolytes, which showed excellent electrochemical performance in the Li-S system, [10] have been demonstrated has higher solubility for NaPS than LiPS, [7b,11] causing serious 'shuttle effect' and mediocre capacities in RT...

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Section: Figuresupporting

confidence: 90%

Section: Figuresupporting

confidence: 90%

Section: Figurementioning

confidence: 99%

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Trimethyl Phosphate for Nonflammable Carbonate‐Based Electrolytes for Safer Room‐Temperature Sodium‐Sulfur Batteries

et al. 2019

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“…[76] Thet ypical carbonates are proven to be good SEI formers,which could passivize the anode and prevent electron transport from the anode to the electrolyte.Especially,when various additives are introduced, such as fluoroethylene carbonate (FEC) and InI 3 ,s table SEI films can be achieved on electrode surface. [77] In the future,great attention must be paid to the conversion mechanism of soluble polysulfide and insoluble (di)sulfides with different electrolyte systems.…”

Section: Discussionmentioning

confidence: 99%

Sulfur‐Based Electrodes that Function via Multielectron Reactions for Room‐Temperature Sodium‐Ion Storage

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Emerging rechargeable sodium‐ion storage systems—sodium‐ion and room‐temperature sodium–sulfur (RT‐NaS) batteries—are gaining extensive research interest as low‐cost options for large‐scale energy‐storage applications. Owing to their abundance, easy accessibility, and unique physical and chemical properties, sulfur‐based materials, in particular metal sulfides (MSx) and elemental sulfur (S), are currently regarded as promising electrode candidates for Na‐storage technologies with high capacity and excellent redox reversibility based on multielectron conversion reactions. Here, we present current understanding of Na‐storage mechanisms of the S‐based electrode materials. Recent progress and strategies for improving electronic conductivity and tolerating volume variations of the MSx anodes in Na‐ion batteries are reviewed. In addition, current advances on S cathodes in RT‐NaS batteries are presented. We outline a novel emerging concept of integrating MSx electrocatalysts into conventional carbonaceous matrices as effective polarized S hosts in RT‐NaS batteries as well. This comprehensive progress report could provide guidance for research toward the development of S‐based materials for the future Na‐storage techniques.

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“…Vora llem mit dem Einsatz von Additiven wie Fluorethylencarbonat (FEC) und InI 3 kçnnen stabile SEI-Filme auf den Elektrodenoberflächen gebildet werden. [77] Künftig wird mehr Aufmerksamkeit dem Umwandlungsmechanismusv on lçslichen Polysulfiden und unlçslichen Sulfiden bzw.D isulfiden mit verschiedenen Elektrolytsystemen gewidmet werden müssen.…”

Section: Schwefeläquivalente Kathodenunclassified

Schwefel‐basierte Elektroden mit Mehrelektronenreaktionen für Raumtemperatur‐Natriumionenspeicherung

et al. 2019

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Natriumspeichersysteme wie Natrium‐Ionen‐ und Raumtemperatur‐Natrium‐Schwefel‐Akkumulatoren finden als günstige Energiespeichertechniken ein zunehmendes Forschungsinteresse. Aufgrund ihrer leichten Verfügbarkeit und ihren einzigartigen chemischen und physikalischen Eigenschaften werden Schwefel‐basierte Materialien, vor allem Metallsulfide (MSx) und elementarer Schwefel (S), aktuell als vielversprechende Kandidaten für Natriumspeicher‐Technologien gesehen – mit hohen Kapazitäten und ausgezeichneter Redoxreversibilität. Hier präsentieren wir einen Überblick über Natriumspeichermechanismen von Schwefel‐basierten Elektrodenmaterialien, mit Schwerpunkt auf neuen Fortschritten und Strategien zur Verbesserung der elektrischen Leitfähigkeit und Tolerierung von Volumenänderungen der MSx‐Anoden sowie auf Schwefelkathoden in RT‐NaS‐Batterien. Außerdem wird ein neues Konzept zur Integrierung von MSx‐Elektrokatalysatoren in konventionelle Kohlenstoffgerüste für die Herstellung polarisierter Schwefelspeicher vorgestellt. Dieser Kurzaufsatz kann als Wegweiser für potenzielle Forschungsrichtungen zur Entwicklung weiterer schwefelbasierter Materialien für künftige Na‐Speichermethoden dienen.

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Fluoroethylene carbonate as an additive in a carbonates-based electrolyte for enhancing the specific capacity of room-temperature sodium-sulfur cell

Cited by 38 publications

References 30 publications

Trimethyl Phosphate for Nonflammable Carbonate‐Based Electrolytes for Safer Room‐Temperature Sodium‐Sulfur Batteries

Trimethyl Phosphate for Nonflammable Carbonate‐Based Electrolytes for Safer Room‐Temperature Sodium‐Sulfur Batteries

Sulfur‐Based Electrodes that Function via Multielectron Reactions for Room‐Temperature Sodium‐Ion Storage

Schwefel‐basierte Elektroden mit Mehrelektronenreaktionen für Raumtemperatur‐Natriumionenspeicherung

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