<b>Sulfur in Amine Solvents</b>

Davis, Robert Earl; Nakshbendi, Hisham F.

doi:10.1021/ja00870a017

Cited by 125 publications

(110 citation statements)

References 1 publication

Supporting

Mentioning

101

Contrasting

Order By: Relevance

“…7) 40,41 . Therefore, it might be reasonable to speculate that the presence of EDA moieties may also help to anchor the sulphur species by forming alkylammonium polysulphides on rGO surface via nucleophilic reaction in organic electrolyte 42,43 . It should be pointed out that the electrostatic interaction between the alkylammonium cations and polysulphide anions might be also important for the efficient entrapment of polysulphides during the extended cycling.…”

Section: Discussionmentioning

confidence: 99%

Enhancing lithium–sulphur battery performance by strongly binding the discharge products on amino-functionalized reduced graphene oxide

et al. 2014

View full text Add to dashboard Cite

Lithium-sulphur batteries are one very appealing power source with high energy density. But their practical use is still hindered by several issues including short lifespan, low efficiency and safety concern from the lithium anode. Polysulphide dissolution and insulating nature of sulphur are generally considered responsible for the capacity degradation. However, the detachment of discharge products, that is, highly polar lithium sulphides, from nonpolar carbon matrix (for example, graphene) has been rarely studied as one critical factor. Here we report the strongly covalent stabilization of sulphur and its discharge products on aminofunctionalized reduced graphene oxide that enables stable capacity retention of 80% for 350 cycles with high capacities and excellent high-rate response up to 4 C. The present study demonstrates a feasible and effective strategy to solve the long-term cycling difficulty for lithium-sulphur batteries and also helps to understand the capacity decay mechanism involved.

show abstract

Section: Discussionmentioning

confidence: 99%

Enhancing lithium–sulphur battery performance by strongly binding the discharge products on amino-functionalized reduced graphene oxide

et al. 2014

View full text Add to dashboard Cite

show abstract

“…1 that were located around 300, 420, and 610 nm, respectively. According to previous works [11][12][13], the absorption band located around 300 nm is associated with the contribution of the zero oxidation state S am dissolved in en; while the reduced polysulfide ions S 6 2À and S 3 À are responsible for the absorption bands around 420 and 610 nm, respectively. As shown in Fig.…”

Section: Resultsmentioning

confidence: 80%

“…During the dissolution process, the solution color changed from deep green into green, yellow green, yellow, fawn and colorless after about 0.5, 1.5, 2.5, 4.5, and 20 h, respectively. The variations of the solution color indicate that the dissolution process may be involved in some chemical reactions, and some kinds of open chain polysulfide ions may appear [11]. The absorption spectra of all the above solutions with different color are shown in Fig.…”

Section: Resultsmentioning

confidence: 99%

The synthesis of HgS microcrystallites with controllable structure and morphology

Zhang

Zuo

Wang

et al. 2004

Materials Research Bulletin

View full text Add to dashboard Cite

“…80 Sulfuramine chemistry was first investigated in the 1960s to explain why the solubility of sulfur in amine solvents was much higher than that predicted by theoretical considerations. 81 Previous studies have revealed that sulfur mainly exists as polysulfide ions and sulfur radicals in amine solutions. 82,83 Since that octatomic S 8 molecules could be quantitatively recovered from sulfur-amine precursor solutions upon addition of diluted acid, 80 sulfur nanoparticles (S NPs) on a reduced graphene oxide (rGO) matrix were prepared for Li-S battery cathode applications (Fig.…”

Section: The Nano Size Effect In Li-s Cathodesmentioning

confidence: 99%

Review—From Nano Size Effect to In Situ Wrapping: Rational Design of Cathode Structure for High Performance Lithium−Sulfur Batteries

Chen

Shen

Wang

et al. 2017

J. Electrochem. Soc.

View full text Add to dashboard Cite

Rechargeable Li-S batteries have become attractive for next-generation energy storage technology due to their high specific energy, low cost, and materials earth abundance. However, the Li-S technology has not been successfully commercialized because of several outstanding challenges including fast capacity fading, low Coulombic efficiency, and limited rate capability. Over the past few years, considerable efforts have been devoted to solving the challenges associated with the sulfur cathode. In this mini review, we summarize our recent advances in Li-S cathodes, such as the understanding of the nano-size effect in sulfur materials, the design of polymer functional additives, and the realization of a novel in situ wrapping approach for Li-S cathodes. The current Li-S technology calls for a rational design of the Li-S cathode that can lead to excellent overall performance of Li-S batteries. Sulfur is a promising cathode material, which is highly earth abundant and with a theoretical specific capacity as high as 1672 mAh g −1 . When the sulfur cathode couples with a lithium metal anode to assemble rechargeable lithium-sulfur (Li-S) batteries, their theoretical specific energy density can reach 2600 Wh kg −1 , which is 3-5 folds higher than those of state-of-the-art Li-ion batteries.1-3 Because of the high energy density and low cost, rechargeable Li-S batteries are promising for applications not only in consumer electronics but also in energy storage and electric vehicles. [4][5][6] Although the research on Li-S batteries has been ongoing for over three decades, two major challenges still remain in this field: one is the low specific capacity due to high electrical resistivity of elementary S and the solid reduction products ((Li 2 S 2 and Li 2 S)) in the cathodes; the other is the fast capacity fading owing to the shuttle effect, i.e. polysulfide intermediates formed during discharge/charge cycles dissolve in the electrolyte, diffuse to the anode, react with Li metal, and form insoluble Li 2 S 2 and Li 2 S at the anodic region, leading to the loss of lithium metal and sulfur cathodic materials. 7,8 In the past few years, researches have mainly focused on designing nanostructured sulfur host materials to address challenges related to poor electrical conductivity of S/Li 2 S 2 /Li 2 S.9-19 A quantum leap for the nanostructure approach was the utilization of ordered mesoporous carbon CMK-3 to trap sulfur, as reported by Nazar et al. in 2009. 20 The conductive mesoporous carbon framework precisely constrains the growth of sulfur within its channels and thus enables fast electronic and ionic transport. Following this work, Cui et al. designed a series of sulfur nanostructures with complicated host materials demonstrating excellent electrochemical performances.9 Various nanostructured host materials, including but not limited to carbon/sulfur, 11,14,16,17,21 polymer/sulfur, [22][23][24] and metal oxide/sulfur composites 12,25,26 have been investigated. These nanostructures provide new merits and opportunities: (1)...

show abstract

Sulfur in Amine Solvents

Cited by 125 publications

References 1 publication

Enhancing lithium–sulphur battery performance by strongly binding the discharge products on amino-functionalized reduced graphene oxide

Enhancing lithium–sulphur battery performance by strongly binding the discharge products on amino-functionalized reduced graphene oxide

The synthesis of HgS microcrystallites with controllable structure and morphology

Review—From Nano Size Effect to In Situ Wrapping: Rational Design of Cathode Structure for High Performance Lithium−Sulfur Batteries

Contact Info

Product

Resources

About