Covalent organic framework wrapped by graphene oxide as an efficient sulfur host for high performance lithium–sulfur batteries

Hu, Zhihong; Yan, Guoying; Zhao, Jiachang; Zhang, Xiaojie; Feng, Yi; Qu, Xiongwei; Ben, Haijie; Shi, Jingjing

doi:10.1088/1361-6528/ac54e0

Cited by 9 publications

(10 citation statements)

References 56 publications

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“…The C 1s spectrum (Figure 2A 2C). 29,30 Furthermore, the TEM images of COF@S (Figure 3) exhibit lengths of ca. 750 nm with the homogeneous mapping patterns of individual elements.…”

Section: Resultsmentioning

confidence: 99%

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Boosting sulfur‐based cathode performance via confined reactions in covalent organic frameworks with polarized sites

et al. 2023

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The widespread promotion of the sulfur‐based cathode is continuously threatened by the dissolution or slow kinetic reactions of polysulfides, resulting in a deterioration of capacity and volume expansion. Herein, a hierarchical imine‐based covalent organic framework (COFs) with AA stacking structure is constructed as a sulfur host matrix. The one‐dimensional channels in COF are decorated with polarized methoxy groups which can confine and immobilize sulfur species through weak interactions, alleviating the shuttle effect during the battery tests. The composite electrode (COF@S) is fabricated through the melt‐diffusion method in one‐pot synthesis and exhibits a slow fading rate (0.20% each cycle) in a 0.5 C stability test. A promising mechanism for constructing the cathode composite is demonstrated in lithium‐sulfur chemistry in this work.

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“…The C 1s spectrum (Figure 2A 2C). 29,30 Furthermore, the TEM images of COF@S (Figure 3) exhibit lengths of ca. 750 nm with the homogeneous mapping patterns of individual elements.…”

Section: Resultsmentioning

confidence: 99%

“…The detected signals of sulfur at 164.45 and 165.68 eV are recognized as the sulfur (S–S) bond (Figure 2C). 29,30 Furthermore, the TEM images of COF@S (Figure 3) exhibit lengths of ca. 750 nm with the homogeneous mapping patterns of individual elements.…”

Section: Resultsmentioning

confidence: 99%

Boosting sulfur‐based cathode performance via confined reactions in covalent organic frameworks with polarized sites

et al. 2023

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“…The critical advancement of GO-based electrochemical energy applications relies on the various approaches for preparation and structural modifications of GO-based electrodes. Functionalization of GO with various species, such as conductive polymers, organic compounds, and nanoparticles, is crucial to unveil the inherent properties of GO in energy storage applications. − Various methodologies for the construction of GO-based electrodes, such as evaporation, spin coating, self-assembling, vacuum filtrations, etc., have been potentially explored to utilize the applications of GO as energy storage materials depending upon the defect densities and thickness of the GO layers. ,− All of these methodologies and requirement of functionalization arise as a result of the limited direction of utilization of GO because of the insulating behavior. These modifications further expand the physical and chemical properties of GO and formulate it as a suitable entrant in the energy storage device.…”

Section: Energy Storage Applicationsmentioning

confidence: 99%

Electrochemical Energy Storage and Conversion Applications of Graphene Oxide: A Review

Gautam,

Kanade,

Kale

2023

Energy Fuels

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Graphene oxide (GO), a single sheet of graphite oxide, has shown its potential applications in electrochemical energy storage and conversion devices as a result of its remarkable properties, such as large surface area, appropriate mechanical stability, and tunability of electrical as well as optical properties. Furthermore, the presence of hydrophilic functionalities on basal and edge planes induces other relevant properties, which make GO an attractive material for electrochemical applications. On account of having structural diversity and enhanced overall crucial properties, GO and its composites have attracted much attention in contribution of energy storage devices, such as batteries, supercapacitors, and energy conversion devices, such as fuel cells and water electrolyzers. Previous review reports demonstrated the individual applications of GO or reduced graphene oxide (RGO) in either of the electrochemical energy devices. The present review highlights all of the recent developments of GO and RGO in both the energy storage and conversion devices along with the recent synthesis methodologies, which are crucial to unveil all of the outperforming properties of GO and RGO. The transition in the synthesis of GO with various chemical methods, including the Brodie and improved Hummers methods, to electrochemical approaches have been described with recent developments as well as highlights of the importance of electrochemical energy in the synthesis of GO. Utilization of GO in energy storage applications predominantly as electrodes and electrolytes and membranes in energy conversion devices further diversify its multiple applicability as a result of its variable functional properties. Multiple energy storage devices, such as Li-ion, Na-ion, Li−S, and flow batteries and supercapacitors, have shown the enhanced performance with the introduction of GO and RGO. Furthermore, GO has also shown excellent applicability in energy conversion devices, such as protonexchange membrane fuel cells, methanol fuel cells, and water electrolyzers, which have also been discussed in this review. This review further summarizes the recent synthesis methodologies of GO and RGO along with their importance in electrochemical energy devices with allied challenges and future perspectives.

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“…Lithium sulfur batteries (LSBs), as one of the most promising secondary batteries, have received extensive attention due to their high theoretical specific capacity (1672 mAh g −1 ) and high energy density (2600 Wh kg −1 ) [1][2][3]. Nevertheless, the low conductivity of sulfur and the shuttle of lithium polysulfide (LiPS) during service process led to severe capacity decay and hysteresis redox reaction kinetics [4,5], which hinders their commercial application [6,7]. To solve the above challenges of LSBs, various catalysts have been proposed to enhance the redox reaction kinetics of sulfur and then promote the conversion of polysulfides, such as metal oxides [8], metal nitrides [9], metal carbides [10] and metal sulfides [11] etc.…”

Section: Introductionmentioning

confidence: 99%

Crystal phase engineering of nanoflower-like hollow MoSe₂ boosting polysulfide conversion for lithium–sulfur batteries

Duan

Cao

et al. 2023

Nanotechnology

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The battery performance of sulfur cathode has obviously depended on the redox reaction kinetics of polysulfides upon cycling. Herein, an effective strategy was proposed to achieve the conversion from 2H (semiconductor phase) to 1T (metal phase) in hollow nano-flowered molybdenum selenide sphere (HFSMS) through crystal phase engineering. The HFSMS with different phase ratio was realized by regulating the proportion of reducing agents. Specifically, the 1T phase content can reach up to 60.8%, and then subsequently decreased to 59.1% with the further increase of the reducing agent. The as-prepared HFSMS with the 1T phase content of 60.8% showed a smallest Tafel slopes (49.99 and 79.65 mV/dec in reduction and oxidation process, respectively), fastest response time and highest response current (520 s, 0.459 mA in Li2S deposition test), which further exhibited excellent catalytic activity and faster reaction kinetics. This result was verified by electrochemical performance, which manifested as stable cycle life with only 0.112% capacity decay per cycle. It was found that the hollow structure can ensures a rich sulfur storage space, and effectually buffer the volume changes of the active substance. More importantly, the improved performance is attributed to the introduction of the 1T phase, which significantly improves the catalytic activity of MoSe2 with promoting the polysulfide conversion.

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Covalent organic framework wrapped by graphene oxide as an efficient sulfur host for high performance lithium–sulfur batteries

Cited by 9 publications

References 56 publications

Boosting sulfur‐based cathode performance via confined reactions in covalent organic frameworks with polarized sites

Boosting sulfur‐based cathode performance via confined reactions in covalent organic frameworks with polarized sites

Electrochemical Energy Storage and Conversion Applications of Graphene Oxide: A Review

Crystal phase engineering of nanoflower-like hollow MoSe₂ boosting polysulfide conversion for lithium–sulfur batteries

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Covalent organic framework wrapped by graphene oxide as an efficient sulfur host for high performance lithium–sulfur batteries

Cited by 9 publications

References 56 publications

Boosting sulfur‐based cathode performance via confined reactions in covalent organic frameworks with polarized sites

Boosting sulfur‐based cathode performance via confined reactions in covalent organic frameworks with polarized sites

Electrochemical Energy Storage and Conversion Applications of Graphene Oxide: A Review

Crystal phase engineering of nanoflower-like hollow MoSe2 boosting polysulfide conversion for lithium–sulfur batteries

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Crystal phase engineering of nanoflower-like hollow MoSe₂ boosting polysulfide conversion for lithium–sulfur batteries