Polysulfide species in various electrolytes of Li-S batteries – a chromatographic investigation

Košir, Urban; Cigić, Irena Kralj; Markelj, Jernej; Talian, Sara Drvarič; Dominko, Robert

doi:10.1016/j.electacta.2020.137227

Cited by 27 publications

(15 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The different behavior of glyme-based and fluorinated-ether-based electrolytes affected the length and potential of the voltage plateaus of the battery upon cycling. 101 The presence of Li 2 S x in the electrolyte solution may have additional major effects on the cell response by influencing the composition of the SEI, as mentioned above and recently investigated. 102…”

Section: “Glyme Electrolyte” In a Li–s Cell: A Battery Close To Practical Applicationsmentioning

confidence: 93%

“…61–82 Moreover, glyme-based electrolytes have been gaining renewed interest due to a possible suitability for the emerging high-energy lithium–sulfur (Li–S) battery, which is formed by combining a lithium–metal anode and a sulfur-based cathode. 83–102 This new technology is nowadays considered close to practical applications and holds promise of a breakthrough in storable energy per unit mass. 103,104 Furthermore, glyme-based solutions have been selected as the electrolytes of choice for the lithium–oxygen (Li–O 2 ) cell, in which a lithium–metal anode is coupled with a gas diffusion layer electrode enabling O 2 electrochemical conversion thanks to an open design.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Glyme-based electrolytes: suitable solutions for next-generation lithium batteries

et al. 2022

View full text Add to dashboard Cite

show abstract

Section: “Glyme Electrolyte” In a Li–s Cell: A Battery Close To Practical Applicationsmentioning

confidence: 93%

Section: Introductionmentioning

confidence: 99%

Glyme-based electrolytes: suitable solutions for next-generation lithium batteries

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Dissolution of sodium sulfides in the electrolyte is another common problem that negatively influences the long-term cycling performance of metal sulfide-based anode materials. In our previous work, we demonstrated that Ti 3 C 2 T x MXene possessed strong affinities for sodium polysulfides [55]. Thereforce, it is expected that the Ti 3 C 2 T x can protect the dissolution of active material through both physical confinement and chemical absorption.…”

Section: Resultsmentioning

confidence: 95%

Flexible sodium-ion capacitors boosted by high electrochemically-reactive and structurally-stable Sb2S3 nanowire/Ti3C2Tx MXene film anodes

et al. 2021

View full text Add to dashboard Cite

The rapid development of portable, foldable, and wearable electronic devices requires flexible energy storage systems. Sodiumion capacitors (SICs) combining the high energy of batteries and the high power of supercapacitors are promising solutions. However, the lack of flexible and durable electrode materials that allow fast and reversible Na + storage hinders the development of flexible SICs. Herein, we report a high-capacity, free-standing and flexible Sb 2 S 3 /Ti 3 C 2 T x composite film for fast and stable sodium storage. In this hybrid nano-architecture, the Sb 2 S 3 nanowires uniformly anchored between Ti 3 C 2 T x nanosheets not only act as sodium storage reservoirs but also pillar the two-dimensional (2D) Ti 3 C 2 T x to form three-dimensional (3D) channels benefiting for electrolyte penetration. Meanwhile, the highly conductive Ti 3 C 2 T x nanosheets provide rapid electron transport pathways, confine the volume expansion of Sb 2 S 3 during sodiation, and restrain the dissolution of discharged sodium polysulfides through physical constraint and chemical absorption. Owing to the synergistic effects of the one-dimensional (1D) Sb 2 S 3 nanowires and 2D MXenes, the resultant composite anodes exhibit outstanding rate performance (553 mAh•g −1 at 2 A•g −1 ) and cycle stability in sodium-ion batteries. Moreover, the flexible SICs using Sb 2 S 3 /Ti 3 C 2 T x anodes and active carbon/reduced graphene oxide (AC/rGO) paper cathodes deliver a superior energy and power density in comparison with previously reported devices, as well as an excellent cycling performance with a high capacity retention of 82.78% after 5,000 cycles. This work sheds light on the design of next-generation low-cost, flexible and fast-charging energy storage devices.

show abstract

“…In parallel with the research on the LiÀ S batteries and limited information available for the MgÀ S system, disproportionation reactions heavily influence the battery performance. For example, they change the voltage profile, since elemental sulfur can be reformed, prolonging the high voltage plateau [27] and change the mechanism of precipitation of short order polysulfides avoiding cathode passivation. [16] To get an insight into the kinetics of the polysulfide redox reaction we employed impedance spectroscopy.…”

Section: Resultsmentioning

confidence: 99%

Magnesium Polysulfides: Synthesis, Disproportionation, and Impedance Response in Symmetrical Carbon Electrode Cells

et al. 2021

Self Cite

View full text Add to dashboard Cite

Magnesium polysulfides have a key role during the redox reaction in magnesium-sulfur batteries. However, kinetics of the Mg polysulfide disproportionation, transport, and solubility in electrolytes are rarely studied. To fill this gap, we here report the synthesis of different chain-length Mg polysulfides and their characterization with 1 H NMR, ATR-IR, and XANES spectroscopies. The tendency of polysulfides to disproportionate in solutions is confirmed with UV/Vis spectroscopy. To probe their reactivity and diffusivity, impedance spectroscopy is performed in symmetrical cells consisting of two planar glassy carbon or porous carbon electrodes containing Mg polysulfide catholyte. Several transport-reaction parameters are obtained, such as exchange current densities, chemical diffusion coefficients, transference numbers of polysulfides, and conductivities. Moreover, we show that the solubility of Mg polysulfides in Mg(TFSI) 2 , MgCl 2 ether-based electrolyte is affected at rather moderate concentration of polysulfides, thereby having an impact on the cell performance.

show abstract

Polysulfide species in various electrolytes of Li-S batteries – a chromatographic investigation

Cited by 27 publications

References 33 publications

Glyme-based electrolytes: suitable solutions for next-generation lithium batteries

Glyme-based electrolytes: suitable solutions for next-generation lithium batteries

Flexible sodium-ion capacitors boosted by high electrochemically-reactive and structurally-stable Sb2S3 nanowire/Ti3C2Tx MXene film anodes

Magnesium Polysulfides: Synthesis, Disproportionation, and Impedance Response in Symmetrical Carbon Electrode Cells

Contact Info

Product

Resources

About