Functional Gel Poly-m-phenyleneisophthalamide Nanofiber Separator Modified by Starch to Suppress Lithium Polysulfides and Facilitate Transportation of Lithium Ions for High-Performance Lithium-Sulfur Battery

Yang, Qi; Yan, Chenzheng; Wang, Xiaoxiao; Xiang, Hengying; Chen, Junyan; Wang, Gang; Wei, Liying; Cheng, Bowen; Deng, Nanping; Zhao, Yue; Kang, Weimin

doi:10.1149/1945-7111/ac0d65

Cited by 3 publications

(2 citation statements)

References 46 publications

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“…This was due to decreased NF diameters with an increased density of fiber roots. Similar benefits of using a fluorinated emulsion were reported in recent investigations by Zhao et al [ 79 ], Yang et al [ 80 ], and Deng et al [ 81 , 82 ]. In all aforementioned studies, fusing a fluorinated emulsion is not enough, and other dopants such as nanoclays [ 83 ], transition metal oxides [ 81 ], polar biomolecules [ 80 ], and catalytic compounds should be added [ 80 ].…”

Section: Novel Nanofiber Separatorssupporting

confidence: 85%

“…This is especially important for batteries that must be replaced regularly due to decaying capacity. Yang et al [ 80 ] modified PMIA NFs with starch, which is one of the most common carbohydrates found abundantly in essential crops like wheat, potatoes, and rice. Increasing starch content increased electrolyte wettability and uptake due to the many –OH and C-O-C groups in starch that have a high affinity for the electrolyte.…”

Section: Composite Nanofiber Separatorsmentioning

confidence: 99%

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Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

2023

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Lithium-Sulfur batteries (LSBs) are one of the most promising next-generation batteries to replace Li-ion batteries that power everything from small portable devices to large electric vehicles. LSBs boast a nearly five times higher theoretical capacity than Li-ion batteries due to sulfur’s high theoretical capacity, and LSBs use abundant sulfur instead of rare metals as their cathodes. In order to make LSBs commercially viable, an LSB’s separator must permit fast Li-ion diffusion while suppressing the migration of soluble lithium polysulfides (LiPSs). Polyolefin separators (commonly used in Li-ion batteries) fail to block LiPSs, have low thermal stability, poor mechanical strength, and weak electrolyte affinity. Novel nanofiber (NF) separators address the aforementioned shortcomings of polyolefin separators with intrinsically superior properties. Moreover, NF separators can easily be produced in large volumes, fine-tuned via facile electrospinning techniques, and modified with various additives. This review discusses the design principles and performance of LSBs with exemplary NF separators. The benefits of using various polymers and the effects of different polymer modifications are analyzed. We also discuss the conversion of polymer NFs into carbon NFs (CNFs) and their effects on rate capability and thermal stability. Finally, common and promising modifiers for NF separators, including carbon, metal oxide, and metal-organic framework (MOF), are examined. We highlight the underlying properties of the composite NF separators that enhance the capacity, cyclability, and resilience of LSBs.

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Section: Novel Nanofiber Separatorssupporting

confidence: 85%

Section: Composite Nanofiber Separatorsmentioning

confidence: 99%

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

2023

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Emerging Strategies for Gel Polymer Electrolytes with Improved Dual‐Electrode Side Regulation Mechanisms for Lithium‐Sulfur Batteries

Cui

Yuan

et al. 2022

Chemistry An Asian Journal

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Although GPE still has the risk of shuttling due to the incomplete removal of liquid electrolytes compared to SPE, which has the most promise of eliminating polysulfide shuttling, researchers have made abundant efforts to eliminate as much of the polysulfide shuttling effect as possible while retaining the unique advantages of GPE. For example, physical barrier to polysulfides by improving the pore size of GPE or fabricating multidimensional structures by different preparation methods. Further chemical adsorption of polysulfides by adding nanofillers to increase polar sites to create polar‐polar interactions with polysulfides or to create Lewis acid‐base interactions. However, although chemical adsorption can indeed highly immobilize polysulfides, it still brings disadvantages such as loss of active material. Therefore, other researchers have employed GPE with ion‐selective permeability that has electrostatic repulsive force or steric hindrance to polysulfides to better inhibit polysulfide shuttling. However, modifying only the cathode side is not enough to enhance this overall properties of Li−S cells. These problems of poor Li+ transport, lithium dendrite growth, and poor SEI due to uneven lithium ion deposit on Li anode side still affect the overall performance of Li−S cells. Therefore, a GPE to improve these problems on the Li anode side is summarized below. Compared with an all‐solid electrolyte, GPE, which has a partially liquid electrolyte, clearly has advantages such as strong interfacial contact, good anode interface compatibility, and high flexibility. However, it is still not comparable to the ionic conductivity, etc. of pure liquid electrolyte only. Therefore, the problems on the lithium metal anode side are mainly focused on the lithium ion transport problems and the problems of lithium dendrite growth and inhomogeneous SEI at the lithium anode interface. Facing the problems in these two aspects, researchers have given many improvement solutions respectively. For the lithium ion transport problem, researchers have instead provided pathways for lithium ion transport by adding amorphous nanofibers or nanofillers to reduce the crystallinity of the polymer and improve the ionic conductivity. Alternatively, the migration number of lithium ions can be increased by limiting the anions in the electrolyte. As for the interfacial problems of lithium anodes, researchers have effectively suppressed the growth of lithium dendrites or inhomogeneous lithium plating/stripping phenomena mainly by adding nanofillers to increase the mechanical strength of GPE or by participating in the generation of SEI.

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Cost-trivial material contributes greatly: A review of the application of starch in energy storage systems

Chen,

Wang,

Huang

et al. 2023

Journal of Energy Storage

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Functional Gel Poly-m-phenyleneisophthalamide Nanofiber Separator Modified by Starch to Suppress Lithium Polysulfides and Facilitate Transportation of Lithium Ions for High-Performance Lithium-Sulfur Battery

Cited by 3 publications

References 46 publications

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

Recent Development in Novel Lithium-Sulfur Nanofiber Separators: A Review of the Latest Fabrication and Performance Optimizations

Emerging Strategies for Gel Polymer Electrolytes with Improved Dual‐Electrode Side Regulation Mechanisms for Lithium‐Sulfur Batteries

Cost-trivial material contributes greatly: A review of the application of starch in energy storage systems

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