Tailoring binder–cathode interactions for long-life room-temperature sodium–sulfur batteries

Eng, Alex Yong Sheng; Nguyen, Dan Thien; Kumar, Vipin; Subramanian, Gomathy Sandhya; Ng, Man‐Fai; Seh, Zhi Wei

doi:10.1039/d0ta07681c

Cited by 56 publications

(56 citation statements)

References 79 publications

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“…Upon charging, Na 2 S is reconverted into polysulfides (−S x −) at ca. 1.9 V and all sulfur is bound to SPAN in the fully charged state above 2.28 V vs. Na/Na + [34,43] . Elemental analysis (Table S2) allows for calculating an atomic ratio between carbon and sulfur, revealing that SPAN contains C‐S x bonds with x =3 on average.…”

Section: Resultsmentioning

confidence: 99%

Ultra‐Stable Cycling of High Capacity Room Temperature Sodium‐Sulfur Batteries Based on Sulfurated Poly(acrylonitrile)

Murugan

Niesen

Kappler

et al. 2021

Batteries & Supercaps

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We report on a room temperature (RT) sodium‐sulfur (Na−S) battery based on a sodium anode, a sulfurated poly(acrylonitrile) (SPAN) cathode and an electrolyte containing sodium tetrakis(hexafluoroisopropyloxy) borate (Na[B(hfip)4]; hfip=hexafluoroisopropoxide) in a mixture of ethylene carbonate (EC), dimethyl carbonate (DMC) and fluoroethylene carbonate (FEC). The hfip anion as a weakly coordinating anion (WCA) provides high anodic stability, high ionic conductivity, and superior electrochemical performance in carbonate‐based solvents. The Na‐SPAN cell exhibits an initial discharge capacity of 1360 normalmnormalAnormalh4ptnormalgnormals-1 and a remarkable reversible capacity of 1072 normalmnormalAnormalh4ptnormalgnormals-1 after 1000 cycles at 3 C (C=C‐rate, 5.025 normalA4ptnormalgnormals-1 ) with an insignificant average capacity decay of less than 0.021 % per cycle. A careful choice of the discharge cut‐off potential (DCP) reveals that a DCP of 0.2 V allows for stable cycling for more than 500 cycles while a DCP of 0.5 V results in a constant capacity decay. The excellent cycle stability at a DCP of 0.2 V is likely to be caused by the high conversion of the SPAN‐bound sulfur into Na2S.

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Section: Resultsmentioning

confidence: 99%

Ultra‐Stable Cycling of High Capacity Room Temperature Sodium‐Sulfur Batteries Based on Sulfurated Poly(acrylonitrile)

Murugan

Niesen

Kappler

et al. 2021

Batteries & Supercaps

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“…To overcome this issue, the use of functional binders such as polyacrylic acid, carboxymethyl cellulose, and alginate appears to be a promising approach. [48,107] These binders provide good mechanical strength, form a strong surface interaction with active materials, and offer high electric and ionic conductivity. [108] In addition, oxygen-containing groups (e.g., CO, OH) can be regarded as anchoring sites to trap the mobile cation as observed in the Li-S battery analog.…”

Section: Electrode Engineering For Better Cyclabilitymentioning

confidence: 99%

Designing Nanostructured Metal Chalcogenides as Cathode Materials for Rechargeable Magnesium Batteries

Regulacio

Nguyen

Horia

et al. 2021

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Rechargeable magnesium batteries (RMBs) are regarded as promising candidates for beyond‐lithium‐ion batteries owing to their high energy density. Moreover, as Mg metal is earth‐abundant and has low propensity for dendritic growth, RMBs have the advantages of being more affordable and safer than the currently used lithium‐ion batteries. However, the commercial viability of RMBs has been negatively impacted by slow diffusion kinetics in most cathode materials due to the high charge density and strongly polarizing nature of the Mg2+ ion. Nanostructuring of potential cathode materials such as metal chalcogenides offers an effective means of addressing these challenges by providing larger surface area and shorter migration routes. In this article, a review of recent research on the design of metal chalcogenide nanostructures for RMBs’ cathode materials is provided. The different types and structures of metal chalcogenide cathodes are discussed, and the synthetic strategies through which nanostructuring of these materials can be achieved are described. An organized summary of their electrochemical performance is also presented, along with an analysis of the current challenges and future directions. Although particular focus is placed on RMBs, many of the nanostructuring concepts that are discussed here can be carried forward to other next‐generation energy storage systems.

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“…The mass density of elemental sulfur is ≈2.07 g cm −3 , while the generated polysulfides have a relatively lower density, for example, the mass density of sodium sulfide decreases to 1.86 g cm −3 . [46] Thus, elemental sulfur undergoes an obvious volume expansion during electrochemical cycles, leading to dramatic structural damage of sulfur cathodes and a short lifespan of MSBs. To this end, the rational design of sulfur cathodes with sufficient space is essential to alleviate the volume changes of elemental sulfur.…”

Section: Challenges Of Non-lithium Msbsmentioning

confidence: 99%

Recent Advances in Emerging Non‐Lithium Metal–Sulfur Batteries: A Review

et al. 2021

Advanced Energy Materials

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Tailoring binder–cathode interactions for long-life room-temperature sodium–sulfur batteries

Abstract: Room-temperature sodium-sulfur batteries (NaSBs) are well poised as candidates for next-generation battery applications. However, two important limitations must first be overcome: irreversible capacity loss from long-chain polysulfide dissolution, and cathode...

Cited by 56 publications

References 79 publications

Ultra‐Stable Cycling of High Capacity Room Temperature Sodium‐Sulfur Batteries Based on Sulfurated Poly(acrylonitrile)

Ultra‐Stable Cycling of High Capacity Room Temperature Sodium‐Sulfur Batteries Based on Sulfurated Poly(acrylonitrile)

Designing Nanostructured Metal Chalcogenides as Cathode Materials for Rechargeable Magnesium Batteries

Recent Advances in Emerging Non‐Lithium Metal–Sulfur Batteries: A Review

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