Effect of silicon dioxide in sulfur/carbon black composite as a cathode material for lithium sulfur batteries

Rajkumar, P.; Diwakar, K.; Radhika, G.; Krishnaveni, K.; Subadevi, R.; Sivakumar, M.

doi:10.1016/j.vacuum.2018.12.016

Cited by 40 publications

(14 citation statements)

References 55 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As seen, two reduction peaks at 2.23 and 1.95 V are consistent with the reactions of solid S 8 to soluble high‐order polysulfides and further to the insoluble low‐order polysulfides. The anodic peak at 2.45 V is attributed to the oxidation of polysulfides to the neutral S 8 , which is consistent with the charge/discharge plateaus shown in Figure a.…”

Section: Resultssupporting

confidence: 85%

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

et al. 2019

View full text Add to dashboard Cite

High energy density Li−S battery has attracted wide attention because of its promising application in long driving‐range electric vehicles. However, the shuttle effect of polysulfides, electrical insulation and volume‐change of sulfur, remain great challenges. Herein, inspired from a natural mimosa pudica structure, we present a novel nanocomposite which consists of a mimosa pudica‐structured carbon matrix coating with sulfur. The biomimetic configuration is able to structurally‐respond to the volume‐change of sulfur during charge/discharge; and the carbon matrix provides a good conductivity for rapid electron transfer. The carbon/sulfur composite‐based Li−S batteries exhibit a good electrochemical performance including a stable capacity after 1000 cycles, along with a Coulombic efficiency as high as 99.6 %, and an excellent rate‐performance even after three rounds of measurements. In addition, the density function theory modeling is investigated, which confirms the adsorption effect of carbon towards the polysulfides including Li2S4, Li2S6, and Li2S8, enabling a long‐term cycling stability.

show abstract

Section: Resultssupporting

confidence: 85%

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

et al. 2019

View full text Add to dashboard Cite

show abstract

“…Due to thermal treatment, the melting sulfur has very low viscosity and could easily disperse into the porous substrates. After the sulfur was integrated into the porous spaces, the sulfur was well-wrapped up into the composite material, which suggests that no sulfur envelops the outer surface of the composite (Rajkumar et al, 2018). The well-resolved sulfur peaks were scattered in the covering materials (Zegeye et al, 2016) and composites showed peaks of sulfur with decreased peak intensity when contrasted with the bare sulfur (JCPDS-Card No.…”

Section: Resultsmentioning

confidence: 99%

Sepiolite Enfolded Sulfur/ZnO Binary Composite Cathode Material for Li-S Battery

2020

View full text Add to dashboard Cite

Lithium-Sulfur (Li-S) batteries have become an incredible challenge for the approaching age of high-vitality stockpiling gadgets. Nevertheless, one of the main specialized issues emerging in Li-S batteries is the polysulfide disintegration among electrodes and striking capacity limit. Here, sieved sepiolite (200 mesh sieve) has been favored as an added substance material to counter the above difficulties in the sulfur battery. The zinc oxide nanoparticles were prepared by co-precipitation method and a Sulfur/post-treated sieved Sepiolite/Zinc Oxide (S/PTSp/ZnO) nanocomposite was prepared by warmth treatment. The prepared composite was described by XRD, FTIR, RAMAN, SEM with EDAX, TEM, XPS, TG, and Electrochemical analysis. The S/PTSp/ZnO composite cathode exhibited an initial discharge capacity of 1,391 mAhg −1 and attained a stable capacity of 765 mAhg −1 at 200 cycles. In conclusion, Li-S batteries can be relied upon to capably build up the utilization of sulfur and limit the disintegration of polysulfides into an electrolyte.

show abstract

“…N -Methyl pyrrolidone (NMP, M w ∼ 99.13 g/mol, Central Drug House Pvt. Ltd.)-based cathode slurry was coated onto a thin aluminum foil (Al), and the electrode was dried in a vacuum oven at 60 °C for 24 h. All of these cells were assembled inside a glovebox filled with argon gas. , Subsequently, the fabricated cells were used for assessing the electrochemical performance of the resultant membranes and the polymer electrolytes using a Biologic electrochemical analyzer (SP-300) at room temperature.…”

Section: Methodsmentioning

confidence: 99%

Enhanced Electrochemical Performance of a Silica Bead-Embedded Porous Fluoropolymer Composite Matrix for Li-Ion Batteries

Saminathan

Sankaranarayanan

Ganesh

2020

Ind. Eng. Chem. Res.

View full text Add to dashboard Cite

Potential composite polymer electrolyte (CPE) membranes, comprising a poly(vinylidene difluoride) (PVdF) and poly(vinylidene fluoride-hexafluoropropylene) (P(VdF-HFP)) blend with embedded silica spheres are fabricated through a spinning cum immersion precipitation technique. Especially, when the weight percentage of PVdF/ P(VdF-HFP)/SiO 2 is 55/40/05, the membrane exhibits low electrolyte leakage and low thermal shrinkage. The fabricated membranes and the corresponding polymer electrolytes are utilized as CPEs for Li + batteries, and their electrochemical performances are evaluated. Among the membranes studied in this work, the ionic conductivity of S5-CPE is measured to be the highest value of 9.9 mS cm −1 at room temperature, which is favorable for displaying good electrochemical performances. A LiFePO 4 |Li cell with the as-prepared S5based CPE exhibits a higher initial discharge capacity of 157 mAh g −1 and outstanding cyclic stability with 92% capacity retention at 0.2C rate after 500 cycles. The lithium transference number (t + ) of the system is found to be 0.28. This can be attributed to the excellent compatibility of the synthesized CPE membrane possessing high cyclic stability and capacity retention for Li + -ion batteries.

show abstract

Effect of silicon dioxide in sulfur/carbon black composite as a cathode material for lithium sulfur batteries

Cited by 40 publications

References 55 publications

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

A Bio‐Inspired Structurally‐Responsive and Polysulfides‐Mobilizable Carbon/Sulfur Composite as Long‐Cycling Life Li−S Battery Cathode

Sepiolite Enfolded Sulfur/ZnO Binary Composite Cathode Material for Li-S Battery

Enhanced Electrochemical Performance of a Silica Bead-Embedded Porous Fluoropolymer Composite Matrix for Li-Ion Batteries

Contact Info

Product

Resources

About