A functional hyperbranched binder enabling ultra-stable sulfur cathode for high-performance lithium-sulfur battery

Luo, Xiang; Lu, Xianbo; Chen, Xiao; Chen, Ya; Yu, Chunyang; Su, Dawei; Wang, Guoxiu; Cui, Lifeng

doi:10.1016/j.jechem.2020.02.041

Cited by 38 publications

(16 citation statements)

References 65 publications

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“…The PI nanofiber membrane is fabricated as separator by electrospinning with a synthesized polyamide acid solution and following by imidization, which can be further served as the substrate for the preparation of the PI/PA and PI/PA-PVA separators due to the existence of both the Van der Waals' force (VDW) and the strong intermolecular hydrogen bonds. 46,49,50 Zeta potentials of these PI nanofiber-based separators and Celgard separator are measured to evaluate the surface charge properties ( Figure S1). As expected, the PI/PA-PVA separator is highly negative-charged state as compared to the PI, PI/PA and Celgard separators.…”

Section: Resultsmentioning

confidence: 99%

A multifunctional polyimide nanofiber separator with a self-closing polyamide–polyvinyl alcohol top layer with a Turing structure for high-performance lithium–sulfur batteries

Luo

Chen

et al. 2020

Mater. Adv.

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Section: Resultsmentioning

confidence: 99%

A multifunctional polyimide nanofiber separator with a self-closing polyamide–polyvinyl alcohol top layer with a Turing structure for high-performance lithium–sulfur batteries

Luo

Chen

et al. 2020

Mater. Adv.

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“…A hyperbranched structure is a polymer structure with a higher degree of branching than the grafted structure. Although this type of polymer is similar in some respects to the polymer with the grafted structure, it can produce more dimensional bonding than the binder with a multi-branched structure, [70] showing more excellent bonding properties. As reported by Jeong et al, [69] a hyperbranched β-cyclodextrin (β-CDp) binder has a higher reversible capacity and better cycle stability than an un-branched β-cyclodextrin.…”

Section: Branchingmentioning

confidence: 99%

Key Factors for Binders to Enhance the Electrochemical Performance of Silicon Anodes through Molecular Design

Wang

et al. 2021

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Silicon is considered the most promising candidate for anode material in lithium‐ion batteries due to the high theoretical capacity. Unfortunately, the vast volume change and low electric conductivity have limited the application of silicon anodes. In the silicon anode system, the binders are essential for mechanical and conductive integrity. However, there are few reviews to comprehensively introduce binders from the perspective of factors affecting performance and modification methods, which are crucial to the development of binders. In this review, several key factors that have great impact on binders’ performance are summarized, including molecular weight, interfacial bonding, and molecular structure. Moreover, some commonly used modification methods for binders are also provided to control these influencing factors and obtain the binders with better performance. Finally, to overcome the existing problems and challenges about binders, several possible development directions of binders are suggested.

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“…[53][54][55][56] Therefore, the priority has switched from anchoring LiPSs in cathode frameworks to promoting the conversion between LiPSs and Li 2 S 2 /Li 2 S. [57][58][59] Although great progress has been achieved in Li-S batteries during past years, a deep insight into the working mechanism and rational design strategies of sulfur hosts is very lacking. [60][61][62][63][64][65][66] Beyond conventional experiments, theoretical simulations have been spread to chemistry, materials science, and energy fields. [67][68][69][70][71][72][73][74][75] Especially, density functional theoretical (DFT) calculations have been widely applied in Li-S batteries, such as probing the adsorption of polysulfides on host materials.…”

Section: Introductionmentioning

confidence: 99%

A review on theoretical models for lithium–sulfur battery cathodes

Feng

Chen

et al. 2022

InfoMat

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Lithium-sulfur (Li-S) batteries have been considered as promising battery systems due to their huge advantages on theoretical energy density and rich resources. However, the shuttle effect and sluggish transformation of soluble lithium polysulfides (LiPSs) hinder the practical application of Li-S batteries.Tremendous sulfur host materials with unique catalytic activity have been exploited to inhibit the shuttle effect and accelerate LiPSs redox reactions, in which theoretical simulations have been widely adopted. This review aims to summarize the fundamentals and applications of theoretical models in sulfur cathodes. Concretely, the integration of theoretical models provides insights into the adsorption and conversion mechanisms of LiPSs and is further utilized in the smart design of catalysts for the exploitation of practical Li-S batteries. Finally, a perspective on the future combination of calculation technology and theoretical models is provided.

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A functional hyperbranched binder enabling ultra-stable sulfur cathode for high-performance lithium-sulfur battery

Cited by 38 publications

References 65 publications

A multifunctional polyimide nanofiber separator with a self-closing polyamide–polyvinyl alcohol top layer with a Turing structure for high-performance lithium–sulfur batteries

A multifunctional polyimide nanofiber separator with a self-closing polyamide–polyvinyl alcohol top layer with a Turing structure for high-performance lithium–sulfur batteries

Key Factors for Binders to Enhance the Electrochemical Performance of Silicon Anodes through Molecular Design

A review on theoretical models for lithium–sulfur battery cathodes

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