Sulfurized polyacrylonitrile for high-performance lithium sulfur batteries: advances and prospects

Zhao, Xiaohui; Wang, Chonglong; Li, Ziwei; Hu, Xuechun; Razzaq, Amir Abdul; Deng, Zhao

doi:10.1039/d1ta03300j

Cited by 89 publications

(83 citation statements)

References 121 publications

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“…In recent years, the group of Tu have carried out extensive studies on a modified poly(vinylidene fluoride)-co-hexafluoropropylene (PVDF-HFP)-based GPE with a 3D network constructed from the photopolymerization of pentaerythritol tetrakis-divinyl adipate (PETT-DA). This 3D network results in the diminished formation of dendrites and the "shuttle effect" [Figure 2F], while PVDF-HFP guarantees the mechanical properties of the GPE [71,79,80] . In addition to academic studies, the practical application of in-situ synthesis techniques has also been studied at an industrial level.…”

Section: Quasi-solid-state Li-s Cellsmentioning

confidence: 99%

Perspective of polymer-based solid-state Li-S batteries

Castillo¹,

Qiao²,

Santiago³

et al. 2022

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Li-S batteries, as the most promising post Li-ion technology, have been intensively investigated for more than a decade. Although most previous studies have focused on liquid systems, solid electrolytes, particularly all-solidstate polymer electrolytes (ASSPEs) and quasi-solid-state polymer electrolyte (QSSPEs), are appealing for Li-S cells due to their excellent flexibility and mechanical stability. Such Li-S batteries not only provide significantly improved safety but are also expected to augment the all-inclusive energy density compared to liquid systems. Therefore, this perspective briefly summarizes the recent progress on polymer-based solid-state Li-S batteries, with a special focus on electrolytes, including ASSPEs and QSSPEs. Furthermore, future work is proposed based on the existing development and current challenges.

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Section: Quasi-solid-state Li-s Cellsmentioning

confidence: 99%

Perspective of polymer-based solid-state Li-S batteries

Castillo¹,

Qiao²,

Santiago³

et al. 2022

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“…However, sulfur undergoes a multi‐step redox reaction involving complex transformation between lithium polysulfides (LiPSs, Li 2 S x ) intermediates, as shown in Figure a. [ 157 ] It is troublesome that the long‐chain Li 2 S x (4 ≤ x ≤ 8) are easily soluble in organic electrolytes and cause a shuttle effect, resulting in the loss of active materials and self‐discharge. Besides, the further discharged Li 2 S 2 and Li 2 S are insoluble and insulative, which prevents the utilization of internal sulfur and causes sluggish reaction kinetics.…”

Section: Organic Polymer Electrode Materialsmentioning

confidence: 99%

Polymer Electrode Materials for Lithium‐Ion Batteries

et al. 2022

Adv Funct Materials

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Polymer electrode materials (PEMs) have become a hot research topic for lithium-ion batteries (LIBs) owing to their high energy density, tunable structure, and flexibility. They are regarded as a category of promising alternatives to conventional inorganic materials because of their abundant and green resources. Currently, conducting polymers, carbonyl polymers, radical polymers, sulfide polymers, and imine polymers as five kinds of PEMs are studied extensively. This review introduces the latest research progress of PEMs for LIBs from the perspectives of molecular structure, redox mechanism, and electrochemical performance. The synthesis mechanisms and methods are outlined to guide the future design of PEMs. However, the practical application of PEMs is limited by their insufficient conductivity, structural instability, and high solubility. Aiming at these obstacles, reasonable optimization strategies are discussed, including the modification of molecular structure, the control of micromorphology, and the composite of carbon materials. Finally, the development trends and prospects of PEMs are put forward.

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“…The discharge/charge processes of LSBs are achieved by the electrochemical cleavage and reformation of sulfur-sulfur bonds, associated with multiple-step redox reactions and complex phase transfers of various LiPS, as shown in Figure 2. [46,47] During the discharge process, elemental sulfur (S 8 ) first combines with Li-ions (step I) through a solid/liquid two-phase reduction to form the dissolved Li 2 S 8 , which then reacts with Li-ions to yield the long-chain LiPS intermediates (Li 2 S n , 4 ≤ n ≤ 8) (step II) through a liquid/liquid reduction process. These two steps contribute to a theoretical capacity of 419 mAh g −1 .…”

Section: Lithium-sulfur Chemistriesmentioning

confidence: 99%

“…[48] The sequent reductions of S 8 to S 6 2− and S 4 2− correspond to the discharge potential platform between 2.2 and 2.3 V (vs Li + /Li), leading to the decrease of sulfur chain length. The formed long-chain Li 2 S n are easily soluble in organic electrolyte, which gradually separate [46] Copyright 2021, Royal Society of Chemistry.…”

Section: Lithium-sulfur Chemistriesmentioning

confidence: 99%

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Polymers in Lithium–Sulfur Batteries

et al. 2021

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Lithium–sulfur batteries (LSBs) hold great promise as one of the next‐generation power supplies for portable electronics and electric vehicles due to their ultrahigh energy density, cost effectiveness, and environmental benignity. However, their practical application has been impeded owing to the electronic insulation of sulfur and its intermediates, serious shuttle effect, large volume variation, and uncontrollable formation of lithium dendrites. Over the past decades, many pioneering strategies have been developed to address these issues via improving electrodes, electrolytes, separators and binders. Remarkably, polymers can be readily applied to all these aspects due to their structural designability, functional versatility, superior chemical stability and processability. Moreover, their lightweight and rich resource characteristics enable the production of LSBs with high‐volume energy density at low cost. Surprisingly, there have been few reviews on development of polymers in LSBs. Herein, breakthroughs and future perspectives of emerging polymers in LSBs are scrutinized. Significant attention is centered on recent implementation of polymers in each component of LSBs with an emphasis on intrinsic mechanisms underlying their specific functions. The review offers a comprehensive overview of state‐of‐the‐art polymers for LSBs, provides in‐depth insights into addressing key challenges, and affords important resources for researchers working on electrochemical energy systems.

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Sulfurized polyacrylonitrile for high-performance lithium sulfur batteries: advances and prospects

Abstract: The lithium sulfur (Li-S) batteries have a high theoretical specific capacity (1675 mAh g-1) and energy density (2600 Wh kg-1), exerting a high perspective as the next-generation rechargeable batteries for...

Cited by 89 publications

References 121 publications

Perspective of polymer-based solid-state Li-S batteries

Perspective of polymer-based solid-state Li-S batteries

Polymer Electrode Materials for Lithium‐Ion Batteries

Polymers in Lithium–Sulfur Batteries

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