Conducting polymer-coated MIL-101/S composite with scale-like shell structure for improving Li–S batteries

Jin, Wenwu; Li, Hejun; Zou, Jizhao; Zeng, Shaohua; Li, Qingduan; Xu, Guozhong; Sheng, Hongchao; Wang, Beibei; Si, Yunhui; Liang, Yu; Zeng, Xierong

doi:10.1039/c7ra12800b

Cited by 29 publications

(17 citation statements)

References 51 publications

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“…Figure 2A describes the XRD pattern of synthetic MIL‐101(Cr), which matched well with the XRD pattern of standard MIL‐101(Cr), showing the high crystallinity of MIL‐101(Cr) 32 . Figure 2B shows XRD diffraction patterns of sulfur, S/MIL‐101(Cr) and S/MIL‐101(Cr)‐H composites.…”

Section: Resultssupporting

confidence: 62%

“…Metal‐organic frameworks (MOFs) with the various structure, adjustable pore size, and easy functionalization of pore surfaces are recognized as a suitable modified matrix for Li‐S battery cathode in recent years 25‐30 . The hierarchical porous structure of MOFs can confine polysulfides/sulfur to promote the utilization of sulfur and the crystalline structure of MOFs with metal as center can bond with polysulfides to enhance anchoring and trapping 31‐37 . Despite the accommodation of mesopores/ macropores with larger pore volume, the utilization rate of sulfur in traditional MOFs matrix is usually low for its open‐pore structure and weaker adsorption cause sulfur loss gradually during charge‐discharge process 38,39 .…”

Section: Introductionmentioning

confidence: 99%

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Alleviating the polysulfides “shuttling” and improving the sulfur utilization ably by the micropores of MOFs materials

et al. 2021

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Summary The irreversible capacity fade, low Coulombic efficiency and sulfur utilization rate caused by the “shuttle” of polysulfides are serious drawbacks of lithium sulfur (Li‐S) battery. Here, a regular octahedral structure and abundant hierarchical porous S/MIL‐101(Cr)‐H, as the electrode of Li‐S battery to catch and anchor polysulfides for alleviating the “shuttle effect” and strengthening the utilization of S, were synthesized by usual hydrothermal and facile heat treatment. Consequently, compared with S/MIL‐101(Cr) (719.52 mA h g−1), S/MIL‐101(Cr)‐H shows better initial discharge capacity (1073.59 mA h g−1) and the reversible capacity remains (446.59 mA h g−1) after 100 cycles at 0.1C, which is much greater than S/MIL‐101(Cr). A capacity of 504.26 mA h g−1 and Coulombic efficiency of approximately 95% at 0.5 C were obtained. The better electrochemical property is ascribed to the coordinated effect of the adsorption of microporous structure and chemical bonding of Cr‐S, which can effectively capture the soluble polysulfides and alleviate “shuttle effect” through physical confinement and chemical anchoring.

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Section: Resultssupporting

confidence: 62%

Section: Introductionmentioning

confidence: 99%

Alleviating the polysulfides “shuttling” and improving the sulfur utilization ably by the micropores of MOFs materials

et al. 2021

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“…Due to a large surface area and pore volume, a MIL-101(Cr) metal-organic framework (MOF) was adopted as sulfur hosts, and biomolecule-doped PEDOT:PSS was coated on the MIL-101(Cr)/S composite to prepare a core-shell sulfur cathode [94]. The PEDOT:PSS coating enhanced the conductivity of the cathode, and provided a strong binding to Li 2 S/Li 2 S 2 , which inhibited the diffusion of polysulfides.…”

Section: Coating Layermentioning

confidence: 99%

Application Progress of Polyaniline, Polypyrrole and Polythiophene in Lithium-Sulfur Batteries

Hong

Liu

et al. 2020

Polymers

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With the urgent requirement for high-performance rechargeable Li-S batteries, besides various carbon materials and metal compounds, lots of conducting polymers have been developed and used as components in Li-S batteries. In this review, the synthesis of polyaniline (PANI), polypyrrole (PPy) and polythiophene (PTh) is introduced briefly. Then, the application progress of the three conducting polymers is summarized according to the function in Li-S batteries, including coating layers, conductive hosts, sulfur-containing compounds, separator modifier/functional interlayer, binder and current collector. Finally, according to the current problems of conducting polymers, some practical strategies and potential research directions are put forward. We expect that this review will provide novel design ideas to develop conducting polymer-containing high-performance Li-S batteries.

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“…Combining MOF/sulfur composites with conductive additives, such as carbon materials (e.g., reduced graphene oxide and carbon nanotubes) and polymers (e.g., polypyrrole and poly(3,4-ethylenedioxythiophene)), has shown some possibility in alleviating this issue. [64][65][66][114][115][116] As an example, a ppy-S-in-PCN-224 composite was fabricated by wrapping sulfur-incorporated MOFs (S-in-PCN-224) with a conductive polymer (polypyrrole [ppy]), and it was applied as a cathode in LSBs, which showed high capacities of 670 and 440 mAh g À1 at 10.0C after 200 and 1,000 cycles, respectively. 65 The ppy coating not only enhanced the electrical conductivity, but also provided additional porosity and flexibility, which effectively accelerated the electron/ion transportation at high rates ( Figure 2B).…”

Section: Lithium-sulfur Batteriesmentioning

confidence: 99%

Metal-Organic Frameworks for Batteries

Zhao

Liang

Zou

et al. 2018

Joule

485

294

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Metal-organic frameworks (MOFs) and their derivatives are two developing families of functional materials for energy storage and conversion. Their high porosity, versatile functionalities, diverse structures, and controllable chemical compositions offer immense possibilities in the search for adequate electrode materials for rechargeable batteries. Despite these advantageous features, MOFs and their derivatives as electrode materials face various challenging issues, which impede their practical applications. From this perspective, we present both the opportunities and challenges that MOFs/MOF composites and MOF-derived materials bring to rechargeable batteries, including lithium-ion batteries, lithium-sulfur batteries, lithium-oxygen batteries, and sodium-ion batteries. By discussing the development of MOFs/MOF composites and MOF-derived materials in each battery system, some design principles that dominate the specific electrochemical behaviors are outlined, with the key requirements that a practical electrode should fulfill. At the end, a basic guidance and future directions for further development are provided.

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Conducting polymer-coated MIL-101/S composite with scale-like shell structure for improving Li–S batteries

Abstract: Lithium–sulfur batteries are regarded as a promising energy storage system.

Cited by 29 publications

References 51 publications

Alleviating the polysulfides “shuttling” and improving the sulfur utilization ably by the micropores of MOFs materials

Alleviating the polysulfides “shuttling” and improving the sulfur utilization ably by the micropores of MOFs materials

Application Progress of Polyaniline, Polypyrrole and Polythiophene in Lithium-Sulfur Batteries

Metal-Organic Frameworks for Batteries

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