Advanced Graphene@Sulfur composites via an in-situ reduction and wrapping strategy for high energy density lithium–sulfur batteries

Yu, Peng; Xiao, Zhichao; Wang, Qianyu; Pei, Jing-Ke; Niu, Yanhua; Bao, Rui‐Ying; Wang, Yu; Yang, Jie

doi:10.1016/j.carbon.2019.05.018

Cited by 30 publications

(15 citation statements)

References 54 publications

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“…Additionally, MOFs have been hybridized with other conductive materials to prepare composite electrodes to settle the significant challenges of the inferior electroconductibility and structure instability during cycling, such as the conducting polymer, CNT, graphene, etc. [ 148–152 ] Among all materials, conductive macromolecules (PANI, PPY, PEDOT, etc.) have been extensively explored owing to their high conductivity and strong chemical confinement on polysulfide intermediates.…”

Section: Enhancing the Conductivity Of Mof‐derived Nanostructuresmentioning

confidence: 99%

Metal–Organic‐Framework‐Derived Nanostructures as Multifaceted Electrodes in Metal–Sulfur Batteries

Yan

Cheng

et al. 2021

Advanced Materials

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Metal‐sulfur batteries (MSBs) are considered up‐and‐coming future‐generation energy storage systems because of their prominent theoretical energy density. However, the practical applications of MSBs are still hampered by several critical challenges, i.e., the shuttle effects, sluggish redox kinetics, and low conductivity of sulfur species. Recently, benefiting from the high surface area, regulated networks, molecular/atomic‐level reactive sites, the metal‐organic frameworks (MOFs)‐derived nanostructures have emerged as efficient and durable multifaceted electrodes in MSBs. Herein, a timely review is presented on recent advancements in designing MOF‐derived electrodes, including fabricating strategies, composition management, topography control, and electrochemical performance assessment. Particularly, the inherent charge transfer, intrinsic polysulfide immobilization, and catalytic conversion on designing and engineering of MOF nanostructures for efficient MSBs are systematically discussed. In the end, the essence of how MOFs’ nanostructures influence their electrochemical properties in MSBs and conclude the future tendencies regarding the construction of MOF‐derived electrodes in MSBs is exposed. It is believed that this progress review will provide significant experimental/theoretical guidance in designing and understanding the MOF‐derived nanostructures as multifaceted electrodes, thus offering promising orientations for the future development of fast‐kinetic and robust MSBs in broad energy fields.

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Section: Enhancing the Conductivity Of Mof‐derived Nanostructuresmentioning

confidence: 99%

Metal–Organic‐Framework‐Derived Nanostructures as Multifaceted Electrodes in Metal–Sulfur Batteries

Yan

Cheng

et al. 2021

Advanced Materials

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“…Graphene, as a flexible and conductive 2D material, is a very attractive nanomaterial for the modification of sulfur cathode. [22][23][24] It has been very challenging to fabricate yolk-shell graphene@sulfur, however, via either template or template-free methods, probably owing to the great difficulty in manipulating graphene morphology at the atomic level. [25] This difficulty also explains why traditional studies on graphene/sulfur composites are limited to core-shell, [26] layer-by-layer structures, or graphene aerogel.…”

Section: Introductionmentioning

confidence: 99%

Template‐Free Self‐Caging Nanochemistry for Large‐Scale Synthesis of Sulfonated‐Graphene@Sulfur Nanocage for Long‐Life Lithium‐Sulfur Batteries

Feng

Dai³

et al. 2021

Adv Funct Materials

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Big volume changes, the shuttle effect, and poor conductivity are well‐known, critical issues of sulfur electrodes that prevent practical application of lithium‐sulfur batteries. The design of active materials with a conductive shell provides an effective solution. Traditional strategies have long been limited for practical applications; however, by low productivity and time/energy consuming template‐based methods. Here, a facile template‐free self‐caging nanotechnology for the scalable fabrication of graphene@sulfur nanocages with atomic‐scale shells is reported. To do that, a new sulfur‐graphene nanochemistry based on a reductive sulfur solution and oxidative sulfonated‐graphene dispersion is developed for the first time. With only the help of mechanical mixing, sulfur particles are successfully synthesized in situ and encapsulated into reaction‐induced self‐assembled sulfonated‐graphene nanocages. These unique nanocages not only provide accommodation of the big volume changes in the active materials, but also exhibit robust polysulfide trapping capability due to the synergistic effects from physical blocking and strong chemical absorption. As a result, the resultant sulfur cathodes deliver superior electrochemical performance and have shown an extremely slow capacity decay of 0.019% per cycle at 0.5 C for over 2000 cycles. This study introduces a new self‐caging nanochemistry for scalable synthesis of functional nanocages with significant applications beyond lithium‐sulfur batteries.

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“…Among the other heteroatoms, sulfur‐doped graphene (S–G) has been shown immense interest due to having a wider bandgap due to the electron‐withdrawing nature of sulfur. [ 4 ] Recently, different research groups reported on multiple efficient applications of S–G, for example, LIBs, [ 5,6 ] Na‐ion batteries, [ 7,8 ] Li–S batteries, [ 9,10 ] supercapacitors, [ 11,12 ] fuel cells, [ 13,14 ] magnetic devices, [ 15 ] and sensors. [ 16 ] Hence, the scope and application of S–G are infinite.…”

Section: Introductionmentioning

confidence: 99%

Sulfur‐Implanted Carbon Dots‐Embedded Graphene as Ultrastable Anode for Li‐Ion Batteries

et al. 2021

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Sulfur doping in carbonaceous materials is an effective approach to improve the performance of Li‐ion batteries (LIBs). Herein, sulfur‐implanted carbon dots‐embedded graphene (S‐CDs/rGO) as an anode material for LIBs is reported. A facile method is used to prepare S‐CDs/rGO by annealing the mixture of benzyl disulfide (BDS) and graphene oxide (GO). Herein, BDS serves as both the sulfur source and precursor of CDs. S‐CDs/rGO as an anode material for LIB delivers initial specific capacities of 938.8 mAh g−1 (first cycle) and 598.6 mAh g−1 (second cycle) at a current density of 100 mA g−1. S‐CDs/rGO exhibits superior cycling performance with good capacity retentions of 78.8% (500 cycles), 61.5% (2000 cycles), and 75.7% (2000 cycles) at higher current densities of 1000, 2000, and 3000 mA g−1, respectively. Moreover, the full cell assembly of the prepared S‐CDs/rGO as an anode and commercial LiFePO4 as a cathode in the voltage range of 1.5–3.9 V delivers a high reversible capacity of 203.3 mAh g−1 after extensive 1000 cycles at 500 mA g−1 with 51.8% retention (a low fading rate of 0.049% per cycle), rendering it as a promising anode material for application in high‐performance LIBs.

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Advanced Graphene@Sulfur composites via an in-situ reduction and wrapping strategy for high energy density lithium–sulfur batteries

Cited by 30 publications

References 54 publications

Metal–Organic‐Framework‐Derived Nanostructures as Multifaceted Electrodes in Metal–Sulfur Batteries

Metal–Organic‐Framework‐Derived Nanostructures as Multifaceted Electrodes in Metal–Sulfur Batteries

Template‐Free Self‐Caging Nanochemistry for Large‐Scale Synthesis of Sulfonated‐Graphene@Sulfur Nanocage for Long‐Life Lithium‐Sulfur Batteries

Sulfur‐Implanted Carbon Dots‐Embedded Graphene as Ultrastable Anode for Li‐Ion Batteries

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