Empowering polypropylene separator with enhanced polysulfide adsorption and reutilization ability for high-performance Li-S batteries

Xiao, Zhen; Li, Yao; Zhang, Wenkui; Huang, Hui; Gan, Yongping; Zhang, Jun; Liang, Chao; Mao, Qinzhong; Peng, Liao; Jin, Yiming; Xia, Yang

doi:10.1016/j.materresbull.2020.111108

Cited by 17 publications

(4 citation statements)

References 45 publications

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“…The difference in wettability was attributed to the varying polarities across the surfaces of the three separators. The uncoated PP separator exhibited a hydrophobic interface and low surface energy, resulting in low wettability . The high porosity and polar surface of the cPAN/Super P composite coating significantly enhanced its wettability, which facilitated Li + transport.…”

Section: Resultsmentioning

confidence: 99%

Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li₂S/r-GONR/CNT-Based Li–S Batteries

Raj Deivendran,

Wu,

et al. 2024

ACS Appl. Energy Mater.

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Practical applications of Li 2 S-based Li−S batteries face two challenges that occur in both electrodes: the shuttle effect of polysulfide (PS) intermediates and the uncontrollable growth of Li dendrites. In this study, Li 2 S was anchored onto the surface of a two-dimensional reduced graphene oxide nanoribbon (r-GONR), which was then entangled and connected by a one-dimensional carbon nanotube (CNT)-designed carbon matrix that facilitated rapid electron transfer and physically confined Li 2 S. Furthermore, polyacrylonitrile (PAN)/Super P blends were used to prepare porous electrically conductive carbon composites as coating layers on a polypropylene (PP) with a bilayer structure to block PS transport and enhance conversion reaction kinetics in Li−S batteries. The resultant carbonized-polyacrylonitrile (cPAN)/Super P-coated PP Janus separators exhibited multifunctional advantages: the porous conductive cPAN/Super P coating interlayer functioned as an upper current collector that increased the electrical conductivity, and abundant pyridinic N groups present in the cyclized cPAN matrix sequestered the PSs through strong interatomic attraction. Compared with the cell containing the uncoated PP separator, this modified PP separator design could synergistically immobilize PSs by chemisorption toward the cathode and reduce the initial activation barrier and overpotential. Furthermore, the PP Janus separator was highly efficient in preventing Li dendrite formation; additionally, the Li//Li symmetric cell containing the Janus separator extended the lifespan up to 1200 h. The electrochemical performance of the Li 2 S/r-GONR/CNT-based cell containing the cPAN/Super P-coated PP Janus separator improved, with an initial discharge capacity of 1059 mA h g −1 at 0.1C and 810 mA h g −1 at 1C. Additionally, the cell maintained a specific capacity of 439 mA h g −1 and exhibited improved capacity retention (68%) after 500 cycles at 3C. This showed that the cell based on the cPAN/Super P-modified PP Janus separator could effectively suppress the PS shuttle effect and prevent Li dendritic growth, thus improving the overall electrochemical performance of Li−S batteries.

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Section: Resultsmentioning

confidence: 99%

Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li₂S/r-GONR/CNT-Based Li–S Batteries

Raj Deivendran,

Wu,

et al. 2024

ACS Appl. Energy Mater.

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“…Good separator wettability is crucial for a rapid ionic transport in Li-S batteries [149]. Jin et al improved wettability of the separator by modifying the surface of an ultrathin coating composed of polar NiOOH nano wall arrays and nonpolar CNT conductive networks [150]. The lower contact angle compared with the PP meant that electrolyte could easily penetrate this composite separator which is beneficial for rapid ionic transportation.…”

Section: Separatormentioning

confidence: 99%

Rational design of nanoarray structures for lithium–sulfur batteries: recent advances and future prospects

et al. 2023

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Lithium–sulfur (Li–S) batteries are considered as promising candidates for future-generation energy storage systems due to their prominent theoretical energy density. However, their application is still hindered by several critical issues, e.g., low conductivity of sulfur species, the shuttling effects of soluble lithium polysulfides, volumetric expansion, sluggish redox kinetics, and uncontrollable Li dendritic formation. Considerable research efforts have been devoted to breaking through the obstacles that are preventing Li–S batteries from realizing practical application. Recently, benefiting from the no additives/binders, buffer of volume change, high sulfur loading and suppress lithium dendrites, the nanoarray structures have emerged as efficient and durable electrodes in Li–S batteries. Herein, recent advances in design, synthesis and application of nanoarray structures in Li–S batteries have been reviewed. First, the multifunctional merits and typical synthetic strategies of employing nanoarray structure electrodes for Li–S batteries are outlined. Second, the applications of nanoarray structures in Li–S batteries are discussed comprehensively. Finally, the challenge and rational design of nanoarray structure for Li–S batteries are analyzed in depth, with the aim of providing promising orientations for commercialization of high-energy-density Li–S batteries.

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“…Thus, the slow diffusion rate of LiPSs to the active surfaces and the limited accessible surfaces of catalyst would severely impair catalytic reaction efficiency if the catalytic active substances are not sufficiently downsized. Therefore, elevating the utilization of active catalytic sites and improving LiPS surface diffusion properties through uniform nanometer-scale distribution or even atomic-scale distribution is another significant criterion for catalyst introduction in Li–S battery systems. , Recently, transition-metal oxyhydroxides (e.g., CoOOH, FeOOH, and NiOOH), which have similar structural composition to transition-metal oxides/hydroxides, have been proved advantageous to ameliorate the kinetics and improve the electrochemical performances of Li–S batteries. ,− Especially, β-Nickel oxyhydroxide (β-NiOOH) is one of the promising transition-metal oxyhydroxide catalysts. Benefiting from the analogous structural composition with NiO and Ni(OH) 2 , β-NiOOH possesses similar catalytic activity and homologous strong polarity for anchoring LiPSs .…”

Section: Introductionmentioning

confidence: 99%

“…Benefiting from the analogous structural composition with NiO and Ni(OH) 2 , β-NiOOH possesses similar catalytic activity and homologous strong polarity for anchoring LiPSs. 27 Besides, the weaker alkalinity than Ni(OH) 2 enables β-NiOOH to be more stable in ether electrolytes. Furthermore, compared with NiO and Ni(OH) 2 (p-type semiconductors), β-NiOOH has lower charge transport impedance and higher electroconductibility as n-type semiconductors, which are beneficial for accelerating electrochemical redox reactions.…”

Section: ■ Introductionmentioning

confidence: 99%

Rational Design of β-NiOOH Nanosheet-Sheathed CNTs as a Highly Efficient Electrocatalyst for Practical Li–S Batteries

Wang¹,

Lu²,

et al. 2021

ACS Appl. Mater. Interfaces

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The shuttle effects of polysulfide intermediates (LiPSs) and sluggish kinetics during sulfur reduction reaction (SRR) process severely exacerbate the electrochemical performances of Li–S batteries. Herein, a unique nanocatalyst comprising β-NiOOH nanosheets uniformly implanted on the surface of carbon nanotubes (CNT@NiOOH) was designed and synthesized for sulfur cathodes. The β-NiOOH nanosheets have great capability of adsorbing LiPSs as well as superior catalytic activity for accelerating LiPS conversion, providing a more efficient method to restrain shuttle effects and improve the kinetics of SRR. Moreover, the nanometer-scale epitaxial growth and uniform distribution of β-NiOOH on CNTs provide a multidimensional catalytic skeleton with sufficient accessible active surfaces, unimpeded LiPS diffusion pathways, and resultant high utilization of active sites. Simultaneously, stable electron transportation pathways are also obtained by being synthesized on CNTs to avoid the faultiness of poor electron conductivity of β-NiOOH. These conspicuous advantages contribute to fully exert the catalytic and LiPS anchoring potential of CNT@NiOOH, bringing about the ultralong cycle performance and excellent capacity reversibility at a high discharge rate. Reticular CNT@NiOOH frameworks are assembled with the sulfur composite materials (SCMs) by a self-assembly method, and a super-high capacity of 813.3 mA h g–1 after 400 cycles at 0.5 C with a small capacity degradation of 0.07% per cycle is achieved. Furthermore, the 3 A h pouch-type cell with the SCM/CNT@NiOOH cathode attains a super-high energy density of about 320 W h kg–1 and shows a superior capacity retention as high as 75.9% after 50 cycles at 0.2 C. This work provides a promising method to accelerate the SRR process and restrain the shuttle effects for practical long-life and high-capacity Li–sulfur batteries.

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Empowering polypropylene separator with enhanced polysulfide adsorption and reutilization ability for high-performance Li-S batteries

Cited by 17 publications

References 45 publications

Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li₂S/r-GONR/CNT-Based Li–S Batteries

Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li₂S/r-GONR/CNT-Based Li–S Batteries

Rational design of nanoarray structures for lithium–sulfur batteries: recent advances and future prospects

Rational Design of β-NiOOH Nanosheet-Sheathed CNTs as a Highly Efficient Electrocatalyst for Practical Li–S Batteries

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Empowering polypropylene separator with enhanced polysulfide adsorption and reutilization ability for high-performance Li-S batteries

Cited by 17 publications

References 45 publications

Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li2S/r-GONR/CNT-Based Li–S Batteries

Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li2S/r-GONR/CNT-Based Li–S Batteries

Rational design of nanoarray structures for lithium–sulfur batteries: recent advances and future prospects

Rational Design of β-NiOOH Nanosheet-Sheathed CNTs as a Highly Efficient Electrocatalyst for Practical Li–S Batteries

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Product

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Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li₂S/r-GONR/CNT-Based Li–S Batteries

Suppression of Polysulfides by Carbonized Polyacrylonitrile Modified Polypropylene Janus Separator for Li₂S/r-GONR/CNT-Based Li–S Batteries