An MXene-based aerogel with cobalt nanoparticles as an efficient sulfur host for room-temperature Na–S batteries

Yang, Qiuju; Yang, Tingting; Gao, Wei; Qi, Yuruo; Guo, Bingshu; Zhong, Wei; Jiang, Jian; Xu, Maowen

doi:10.1039/d0qi00939c

Cited by 36 publications

(26 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The S 2p 3/2 signals at 162.2 eV can be assigned to C=S and the peak at 164.0 eV can be assigned to S−S/C‐S x moieties [11,35, 58] . Sulfate or thiosulfate species are observed at 166–172 eV [30,59–60] . The charged cathode (Figure 8d) shows similar sulfur components except for the thiosulfates, which were probably oxidized to sulfate during charging.…”

Section: Resultsmentioning

confidence: 96%

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

Murugan

Niesen

Kappler

et al. 2021

Batteries & Supercaps

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 96%

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

Murugan

Niesen

Kappler

et al. 2021

Batteries & Supercaps

View full text Add to dashboard Cite

show abstract

“…Xu's group recently synthesized a 3D aerogel with Ti 3 C 2 T x MXene and reduced graphene oxide (rGO) for sulfur storage. [ 59 ] The MXene and rGO obtain conductive network and considerable S sites, which effectively improves the sluggish kinetics. As a result, the cathode displayed reversible capacity under the solid‐liquid conversion (Figure 5c).…”

Section: Electrolytes For Rt Na–s Batteriesmentioning

confidence: 99%

Section: Electrolytes For Rt Na–s Batteriesmentioning

confidence: 99%

Section: Cathode and Anodementioning

confidence: 99%

“…synthesized an MXene‐based cathode (MG‐Co) with rGO and Co nanoparticles (Figure 9c). [ 59 ] MXene and rGO provided high specific surface area for loading sufficient S, while the Co nanoparticles offered chemical adsorption toward solvated polysulfides. This strategy is widely applied in cathode design for ether electrolyte.…”

Section: Cathode and Anodementioning

confidence: 99%

See 2 more Smart Citations

Electrolytes/Interphases: Enabling Distinguishable Sulfur Redox Processes in Room‐Temperature Sodium‐Sulfur Batteries

Liu

Lai

Lei

et al. 2022

Advanced Energy Materials

View full text Add to dashboard Cite

Sodium and sulfur offer a promising application in rechargeable batteries due to their low cost, abundant resources and high energy density. Room‐temperature (RT) Na–S batteries have been proposed by paring S cathodes with Na anodes in non‐aqueous liquid electrolytes. Over decades, researchers have mainly focussed on the development of superior electrodes by nano‐engineering efficient S cathodes and stable Na anodes. These studies have effectively improved the electrochemical performance of RT Na–S batteries, validating their bright prospects as stationary energy storage devices for the modern renewable energy trajectory. In comparison, the research on electrolytes receives much less attention, and there is a lack of understanding regarding the impacts of different electrolytes on electrode interfaces and overall battery mechanisms. In this review, multiple‐kinds of electrolytes and the interfaces between electrolytes and electrodes in RT Na–S batteries are comprehensively discussed. Challenges and recent progress are presented in terms of the sulfur electrochemical mechanisms: The solid‐solid and solid‐liquid conversions. With the presentation of the S redox mechanism, future prospects of electrolyte optimizations, cathode, and anode as well as interfacial improvement are systematically discussed.

show abstract

Recent Advances in MXene‐Based Aerogels: Fabrication, Performance and Application

Wei

Zhang

Wang

et al. 2022

Adv Funct Materials

View full text Add to dashboard Cite

As one of the “miracle materials” in the 21st century, aerogels with ultra‐low weight and remarkable mechanical performance have emerged and shown incredible immunity to harsh working environments, attracting substantial research interests across a wide range of areas. Recently, exploitation of MXene nanosheets into aerogels represents a new research focus in the field of materials science, on account of their unique structures and outstanding properties. In this review, the aim is to provide a timely and insightful overview for the recent advances in the fabrication, performance, and application of MXene‐based aerogels. The main strategies for constructing MXene‐based aerogels, directly from MXene‐dispersion or in the presence of other functional components, are summarized. Furthermore, the desirable performance of MXene‐based aerogels and their related applications in the areas including electromagnetic management, sensors, solar steam generators, and energy storage are highlighted. A thorough investigation and comparison of their mechanical, electrical, sensing, and other properties are performed to understand the structure‐property relationships. At last, this study is concluded with summary and outlook section on the future development as well as challenges that remained, thus bringing new research opportunities for the material engineering and functional application of MXene‐based aerogels.

show abstract

An MXene-based aerogel with cobalt nanoparticles as an efficient sulfur host for room-temperature Na–S batteries

Abstract: A network-like MG-Co composite with adsorption and catalysis for Na2Sx is synthesized as a S host for room temperature Na–S batteries, exhibiting excellent electrochemical performance.

Cited by 36 publications

References 37 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)

Electrolytes/Interphases: Enabling Distinguishable Sulfur Redox Processes in Room‐Temperature Sodium‐Sulfur Batteries

Recent Advances in MXene‐Based Aerogels: Fabrication, Performance and Application

Contact Info

Product

Resources

About