Ion-selective PEDOT:PSS-decorated separator as a potential polysulfide immobilizer for lithium-sulfur batteries

Hareendrakrishnakumar, Haritha; Chulliyote, Reshma; Joseph, Mary Gladis

doi:10.1007/s11581-020-03870-5

Cited by 18 publications

(23 citation statements)

References 66 publications

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“…After the LPS adsorption test, the prepared sample (WPU‐CQD5) was characterized by XPS analysis. The Li 1 second XPS profile in Figure S1B shows the interaction between the abundant functional groups of WPU‐CQD5 and LPS (Li⋯O and Li⋯N) 29‐31 . Moreover, it is expected that the abundant functional groups of the WPU‐CQDs effectively increased the number of active sites that interacted with LPS (eg, Li⋯O and Li⋯N) 32 …”

Section: Resultsmentioning

confidence: 97%

“…The Li 1 second XPS profile in Figure S1B shows the interaction between the abundant functional groups of WPU-CQD5 and LPS (LiÁ Á ÁO and LiÁ Á ÁN). [29][30][31] Moreover, it is expected that the abundant functional groups of the WPU-CQDs effectively increased the number of active sites that interacted with LPS (eg, LiÁ Á ÁO and LiÁ Á ÁN). 32 In addition to enhancing the electrochemical regulating properties, the basic role of a binder, that is, to provide robust mechanical properties, is also important.…”

Section: Resultsmentioning

confidence: 99%

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Aqua‐processable carbon quantum dot–assisted resilient polymer binder for advanced lithium‐sulfur batteries

Kim

et al. 2021

Intl J of Energy Research

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Lithium-sulfur batteries (LSBs) with outstanding theoretical capacity and environmentally friendly properties are regarded as next-generation energy storage devices. However, the shuttle effect of lithium polysulfide (LPS) limits the practical application of LSBs. Herein, we introduce an aqua-processable carbon quantum dot (CQD)-assisted resilient waterborne polyurethane (WPU) network binder for sulfur cathodes. WPU is a well-dispersed colloidal system with abundant polar groups that is suitable for regulating LPS shuttle effects. CQDs were prepared from WPU by hydrothermal treatment. The CQDs enabled facile electron/ion transport, enhanced the adsorption capability of LPS, and formed a robust network. Moreover, the chemical similarity between WPU and CQDs enabled the formation of a well-dispersed system, thereby affording optimal electrochemical performance. The WPU-CQD binder systems exhibited stable cycling performance at a high rate of 2C, with only 0.028% retention decay per cycle over 1000 cycles.

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Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Aqua‐processable carbon quantum dot–assisted resilient polymer binder for advanced lithium‐sulfur batteries

Kim

et al. 2021

Intl J of Energy Research

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“…The study of static stability and attenuation of self-discharge behavior is a highly crucial factor to be considered while developing Li–S cells. The polysulfide shuttle effect and the associated issues lead to high self-discharge in Li–S cells to a great extent . To ascertain the self-discharge behavior of the cells, the OCV was monitored for a duration of 100 h (Figure a).…”

Section: Resultsmentioning

confidence: 99%

“…The polysulfide shuttle effect and the associated issues lead to high self-discharge in Li−S cells to a great extent. 74 To ascertain the self-discharge behavior of the cells, the OCV was monitored for a duration of 100 h (Figure 8a). The CMS cell was able to maintain a constant voltage of 2.7 V for 100 h, which ensures the ability of the CMS composite in capturing the polysulfides.…”

Section: Resultsmentioning

confidence: 99%

Synergistic Restriction to Polysulfides by a Carbon Nanotube/Manganese Sulfide-Decorated Separator for Advanced Lithium–Sulfur Batteries

Kannan

Hareendrakrishnakumar

Joseph

et al. 2022

Energy Fuels

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Polysulfide dissolution and shuttling limit the capacity output and cycle life of lithium−sulfur batteries to a great extent. Separator modification using polar materials exploiting the ability to entrap polysulfides has been demonstrated as an effective approach to deal with the conundrum of polysulfide shuttling. Herein, a carbon nanotube/manganese sulfide nanocomposite is designed as a separator modifier in lithium−sulfur batteries for the first time. Furthermore, the carbon nanotube network provides a continuous network for rapid electronic conduction, imparts structural stability, and acts as a secondary barrier for polysulfides. Consequently, the cell displays an initial discharge capacity of 876 mAh g −1 at 0.5 C and sustains excellent stability with a retained capacity of 76% after 500 cycles. The self-discharge of the cell is also conspicuously reduced, maintaining a constant voltage for 100 h under open-circuit conditions. The electrochemical results represent an effective strategy to realize better performing Li−S batteries.

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“…In addition, it further increases the electrolyte uptake, interfacial contact, high binding ability, and enormous hydrophilicity. [10][11][12] Different polymeric materials such as polyaniline, [13] polypyrrole, [14] poly(acrylic acid), [15] polydopamine, [16] polyethylene glycol, [17] polyethylene oxide, [18] polyvinylpyrrolidone, [19] polyacrylonitrile, [20] Poly(methyl methacrylate), [21] Poly(allylamine hydrochloride), [22] polyvinylidene fluoride, [23] Nafion, [24] polystyrene sulfonic acid, [25] sulfonated poly(ether ether ketone) (SPEEK), [26] PEDOT: PSS, [27] sulfonated polystyrene, [28] carboxylate anchored polyvinyl alcohol, [29] etc. have been used as the surface modifiers for the separators and as interlayers to mitigate the polysulfide crossover in LiÀ S batteries.…”

Section: Introductionmentioning

confidence: 99%

Experimental and Theoretical Analysis of Synthesized Poly(Pthalazinone Ether Sulfone Ketone) Copolymer‐Modified Separators for Li−S Batteries

et al. 2022

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Lithium‐Sulfur (Li−S) batteries have become an undoubtful choice for future high‐energy applications due to their high theoretical capacity and energy density. However, the “Shuttle Effect” is a phenomenon that hinders the practical application of Li−S batteries. The present work reports a facile synthesis of poly(phthalazinone ether sulfone ketones) (PPESK) as a surface modifier for the conventional glass fiber separator to arrest the shuttle effect. PPESK is prepared by aromatic nucleophilic substitution (SNAr) with 4‐(4‐hydroxyphenyl) phthalazin‐1(2H)‐one, bis (4‐chlorophenyl methanone), and 4,4′‐sulfinyl‐bis (chlorobenzene). The Li−S cells with PPESK@GF separators deliver a high initial discharge capacity of 1054.2 mAh g−1 at 0.2 C than GF (991.5 mAh g−1 at 0.2 C). Density functional theory (DFT) calculations are performed to determine the interaction between the PPESK with lithium polysulfides, Li2Sn (n=1, 2, 4, 6, and 8). The results indicate that all the lithium polysulfides strongly bind with the sulfone nitrogen site of the PPESK structure with high binding energy, particularly Li2S6 has −492.58 kcal/mol. The atoms‐in‐molecules analysis (AIM) shows the presence of ionic bonds between PPESK and lithium polysulfides. Gibb's free energy, the thermodynamical parameter, indicates that the reaction is exergonic and spontaneous. Overall, the theoretical findings augment the observed experimental results.

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Ion-selective PEDOT:PSS-decorated separator as a potential polysulfide immobilizer for lithium-sulfur batteries

Cited by 18 publications

References 66 publications

Aqua‐processable carbon quantum dot–assisted resilient polymer binder for advanced lithium‐sulfur batteries

Aqua‐processable carbon quantum dot–assisted resilient polymer binder for advanced lithium‐sulfur batteries

Synergistic Restriction to Polysulfides by a Carbon Nanotube/Manganese Sulfide-Decorated Separator for Advanced Lithium–Sulfur Batteries

Experimental and Theoretical Analysis of Synthesized Poly(Pthalazinone Ether Sulfone Ketone) Copolymer‐Modified Separators for Li−S Batteries

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