Understanding the role of lithium sulfide clusters in lithium–sulfur batteries

Tong, Ying; Li, Fēi; Liu, Chunyu; Zhang, Shoutao; Xu, Hongyan; Yang, Guochun

doi:10.1039/c7ta01006k

Cited by 45 publications

(41 citation statements)

References 71 publications

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“…Similar results have also been observed for higher order Li polysulfides in Li-S batteries. 66 On a closer observation, we find that all the S atoms in these Al polysulfides. This could be one of reasons for the irreversibility observed in the charging process in Al-S batteries, which involves conversion of lower order to higher order Al 2 S x .…”

Section: Computational Detailsmentioning

confidence: 62%

Superior anchoring effect of a Cu-benzenehexathial MOF as an aluminium–sulfur battery cathode host

Bhauriyal

Pathak

2020

Mater. Adv.

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Section: Computational Detailsmentioning

confidence: 62%

Superior anchoring effect of a Cu-benzenehexathial MOF as an aluminium–sulfur battery cathode host

Bhauriyal

Pathak

2020

Mater. Adv.

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“…[36] As the anode is discharged to lower potential, the CTS NPs dissociate further and upon the total discharge to 0.01 V, the sharp peaks of Li x Sn, Li 2 S and Cu metal which is a buffer matrix imply the total conversion of the material. [37,38] The XPS data for the fully discharged (Li-incorporated) CTS electrode are shown in Figure 6. The electrolyte dissociates into ROLi, HCO 2 Li and also S=O and SÀ O components along with the CÀ C, CÀ H, CÀ F and CÀ O groups.…”

Section: Resultsmentioning

confidence: 99%

“…The electrolyte dissociates into ROLi, HCO 2 Li and also S=O and SÀ O components along with the CÀ C, CÀ H, CÀ F and CÀ O groups. [37,38] The XPS data for the fully discharged (Li-incorporated) CTS electrode are shown in Figure 6. These data establish the presence of Cu 0 (Figure 6a) [39] and Li 2 S (Figure 6b) [40] consistent with the right hand side of Equation 1; also corroborating the presence of these two states as reflected in the PXRD result (Figure 5a).…”

Section: Resultsmentioning

confidence: 99%

Single‐Phase Cu₃SnS₄ Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes

et al. 2019

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With the evolution of Li-ion batteries, they have been employed in many applications. However, high energy density and power density batteries are yet to be developed to meet the necessities at the application end. Sulfides are a good choice as anode material as they show a much higher specific capacity than conventional graphite anodes. But unfortunately, sulfide dissolution and polysulfide shuttling are big drawbacks for their operation. Herein, single phase ternary metal sulfide Cu 3 SnS 4 (CTS) nanoparticles are synthesized with high Cu : Sn ratio and examined for application as Li-ion battery anode. High specific capacities of 1082 mAh g À 1 at 0.2 A g À 1 and 440 mAh g À 1 at a high rate of 3 A g À 1 are realized with superior stability tested up to 950 cycles. Utilizing the CTS NPs can minimize the polysulfide dissolution. The high Cu : Sn ratio provides excess Cu atoms as the buffer matrix for volume expansion of Sn, leading to high stability and specific capacity. Compared to other reported Cu based mixed phase or composite ternary sulfide materials, the CTS NPs presented herein show a better performance. In a full cell device using LiCoO 2 (LCO) as cathode, a good performance is achieved as well with an energy density of 405 Wh/Kg at 0.1 A g À 1 . V-10 mA battery tester. The impedance and cyclic voltammetry were performed with VMP3 biologic system equipped with potentiostat and galvanostat channels.

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“…On the one hand, the hierarchically porous system promises a high sulfur loading and high physisorption ability for trapping soluble polysulfides . On the other hand, owing to the much higher electronegativity of the N atom than the C atom, the abundance of quaternary N and pyridinic N in the carbon matrix provided additional adsorption through ionic bonding and intermolecular Keesom interactions . Based on the Lewis acid–base theory, more negative pyridinic N atoms with additional lone pair electrons serve as electrons donors, while terminal lithium atoms in polysulfides with empty orbitals serve as electrons acceptor .…”

Section: Resultsmentioning

confidence: 99%

Dodecylamine‐Induced Synthesis of a Nitrogen‐Doped Carbon Comb for Advanced Lithium–Sulfur Battery Cathodes

Lü

Zhong

Zhou

et al. 2018

Adv Materials Inter

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cycling life, significant self-discharge, and decreased Coulombic efficiency of the batteries. [3][4][5] The second is the inherent poor electrical conductivity of the sulfur that often results in unsatisfactory rate capabilities and the poor utilization of sulfur. [6][7][8] To tackle the first issue, tremendous efforts have been made to develop a facile approach to realize the physical confinement of soluble sulfur species within the pores of nonpolar hydrophobic carbon materials, such as highly ordered mesoporous carbons, [9][10][11][12] hollow carbon spheres (HCSs), [8,[13][14][15][16] carbon papers, and graphene foams. [17,18] Typically, the physisorption capability is determined by capillary force, which is created as a result of the porous structure of the materials. [19,20] Therefore, the design of electrode architectures with unique pore structures (micro-, meso-, and macroporous) is one of the most important directions toward the development of a carbon-based host for Li-S batteries. In our previous work, the excellent confinement of polysulfides was achieved by utilizing HCSs with unique indented-void shells. [16] In our most recent work, a stable cycling performance at a high rate was also achieved by the rational design of HCSs with highly ordered mesoporous shells. [21,22] However, the performance, particularly the cycle stability, of Li-S cathodes is still insufficient based simply on physisorption because the weak adsorption capability of nonpolar hydrophobic carbon hosts for the highly polar hydrophilic Li 2 S x (4 ≤ x ≤ 8) is far from satisfactory. [23] Therefore, further improvement is still required.Anchoring the soluble Li 2 S x species via chemisorption using heteroatom-doped carbon, [24,25] graphitic carbon nitride (e.g., C 3 N 4[26-28] ), oxides (e.g., MnO 2 , [29,30] TiO 2 , [31] Ti 4 O 7 , [32] CeO 2 [33] ), nitrides (e.g., VN, [34] TiN [35] ), and sulfides (Co 9 S 8 , [36] NiS, [37] TiS 2 [38] ) have been extensively exploited and results in higher efficiency toward suppressing the sulfur loss than physical confinement. However, some of these materials have a poor electrical conductivity, requiring a large number of conductive additives to receive a decent rate performance. [28,30] N-doped carbon is considered a promising host material for sulfur due to the Lewis acid-base interaction between Li ions in the polysulfides and N atoms in the carbon matrix, thus contributing to effective suppression of polysulfide shuttling during charging. [39][40][41][42] Additionally, nitrogen doping can increase the intrinsic electrical conductivity of carbon materials, which enhances the rate performance.Host materials that can provide both a strong absorbability of soluble intermediate polysulfides and a high electronic conductivity are in high demand to realize practical applications of Li-S batteries. Here, the rational design of an N-doped carbon comb (NCC) as a new type of sulfur host for Li-S batteries, delivering a favorable performance, particularly a good cycling stability and rate capability, ...

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Understanding the role of lithium sulfide clusters in lithium–sulfur batteries

Abstract: Our results represent a significant step towards understanding the structures and stabilities of lithium sulfide clusters, and improving the performance of Li–S batteries.

Cited by 45 publications

References 71 publications

Superior anchoring effect of a Cu-benzenehexathial MOF as an aluminium–sulfur battery cathode host

Superior anchoring effect of a Cu-benzenehexathial MOF as an aluminium–sulfur battery cathode host

Single‐Phase Cu₃SnS₄ Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes

Dodecylamine‐Induced Synthesis of a Nitrogen‐Doped Carbon Comb for Advanced Lithium–Sulfur Battery Cathodes

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Understanding the role of lithium sulfide clusters in lithium–sulfur batteries

Abstract: Our results represent a significant step towards understanding the structures and stabilities of lithium sulfide clusters, and improving the performance of Li–S batteries.

Cited by 45 publications

References 71 publications

Superior anchoring effect of a Cu-benzenehexathial MOF as an aluminium–sulfur battery cathode host

Superior anchoring effect of a Cu-benzenehexathial MOF as an aluminium–sulfur battery cathode host

Single‐Phase Cu3SnS4 Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes

Dodecylamine‐Induced Synthesis of a Nitrogen‐Doped Carbon Comb for Advanced Lithium–Sulfur Battery Cathodes

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Single‐Phase Cu₃SnS₄ Nanoparticles for Robust High Capacity Lithium‐Ion Battery Anodes