ReS2 nanosheets anchored on rGO as an efficient polysulfides immobilizer and electrocatalyst for Li-S batteries

Liu, Huaxiong; Chen, Biao; Qin, Hongye; Wang, Ning; Liu, Enzuo; Shi, Chunsheng; Zhao, Naiqin

doi:10.1016/j.apsusc.2019.144586

Cited by 27 publications

(23 citation statements)

References 62 publications

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“…[39,40] These attributes warrant its investigation as an efficient electrocatalyst toward LiPS conversion. [41] However, since research into electrocatalysis of LiPS conversion is still at an early stage, determining the mechanism of enhancing the LiPS conversionThe practical viability of Li-S cells depends on achieving high electrochemical utilization of sulfur under realistic conditions, such as high sulfur loading and low electrolyte/sulfur (E/S) ratio. Here, metallic 2D 1T′-ReS 2 nanosheets in situ grown on 1D carbon nanotubes (ReS 2 @CNT) via a facile hydrothermal reaction are presented to efficiently suppress the "polysulfide shuttle" and promote lithium polysulfide (LiPS) redox reactions.…”

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confidence: 99%

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1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Bhargav

Asl

et al. 2020

Advanced Energy Materials

168

103

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The practical viability of Li–S cells depends on achieving high electrochemical utilization of sulfur under realistic conditions, such as high sulfur loading and low electrolyte/sulfur (E/S) ratio. Here, metallic 2D 1T′‐ReS2 nanosheets in situ grown on 1D carbon nanotubes (ReS2@CNT) via a facile hydrothermal reaction are presented to efficiently suppress the “polysulfide shuttle” and promote lithium polysulfide (LiPS) redox reactions. The designed ReS2@CNT nanoarchitecture with high conductivity and rich nanoporosity not only facilitates electron transfer and ion diffusion, but also possesses abundant active sites providing high catalytic activity for efficient LiPS conversion. Li–S cells fabricated with ReS2@CNT exhibit high capacity with superior long‐term cyclability with a capacity retention of 71.7% over 1000 cycles even at a high current density of 1C (1675 mA g−1). Also, pouch cells fabricated with the ReS2@CNT/S cathode maintain a low capacity fade rate of 0.22% per cycle. Furthermore, the electrocatalysis mechanism is revealed based on electrochemical studies, theoretical calculations, and in situ Raman spectroscopy.

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confidence: 99%

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confidence: 99%

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Bhargav

Asl

et al. 2020

Advanced Energy Materials

168

103

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“…This result unveils stronger interaction between ReS 2 nanosheet and Li 2 S 6 than the ReS 2 nanospheres. [149] By studying the interaction of Li 2 S 6 , the XPS signals positioned at 161.5 and 163.0 eV were assigned to terminal sulfur (S T ) and bridging sulfur (S B ), respectively. The XPS signals of S 2p spectrum for ultrathin sheets of MoS 2 /g-C 3 N 4 /S composite with Li 2 S 6 decrease to the S T and S B binding energy (161.1 and 162.1 eV, respectively) (Figure 9b).…”

Section: Metal Dichalcogenidementioning

confidence: 99%

Section: Metal Dichalcogenidementioning

confidence: 99%

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Lithium–Sulfur Battery Cathode Design: Tailoring Metal‐Based Nanostructures for Robust Polysulfide Adsorption and Catalytic Conversion

2021

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portable electronic devices such as laptops and mobile phones. However, with the increasing demand for clean energy and portable electronics, the energy densities powered by the LIB (≈300 mAh g −1 ) are beginning to reach the threshold limit and thus, leading to a need for an alternate environmentally friendly and more economical energy storage technology with higher energy densities. [1] One of the most promising candidates for the LIB replacement is the lithium-sulfur (Li-S) battery, which utilizes the redox reaction between sulfur and lithium. Compared to LIB and other metal-sulfur batteries (Figure 1a), Li-S batteries are profiled as a viable energy storage technology stemming from their high specific energy capacity of 1675 mAh g −1 and superior energy density of around 2670 Wh kg −1 . [1a-d,2] The elemental sulfur, which is used as the cathode material, also has a multitude of auspicious properties such as its inexpensiveness, environmentally friendliness, abundancy and non-toxicity. [2d,3] In addition, another emerging battery system is the metal-air battery, which is a half-open system that utilize oxygen from ambient air as the active cathode material. Thus, Li-S batteries are comparatively safer due to their enclosed system. Apart from that, the influence of CO 2 , H 2 O, and N 2 in ambient air can lead to chemical instability in metal-air batteries. [4] Taking Li-air batteries as an example, the presence of CO 2 leads to the formation of Li 2 CO 3 , which is more chemically stable than Li 2 O 2 and causes a larger charge overpotential, hence leading to decomposition issues of electrolytes. [5] Nevertheless, progress for the real-world usage of Li-S batteries is currently hindered by multiple drawbacks. First, despite its manifold advantages, sulfur and its discharge products (Li 2 S or Li 2 S 2 ) are inherently insulating with low conductivities of 10 −7 to 10 −30 S cm −1 at room temperature, rendering it unbefitting to be directly used as the cathode. [6] Second, the inevitable volume expansion of the electrode (≈80%) due to the contrasting densities of S 8 and Li 2 S causes structural damage during the charge/discharge cycle. [7] Third, the "polysulfide shuttle effect" would occur, whereby the soluble higher order polysulfides (Li 2 S 4 to Li 2 S 8 ) dissolve in the electrolyte and migrate between the anode and the cathode, leading to its Lithium-sulfur (Li-S) batteries have a high specific energy capacity and density of 1675 mAh g −1 and 2670 Wh kg −1 , respectively, rendering them among the most promising successors for lithium-ion batteries. However, there are myriads of obstacles in the practical application and commercialization of Li-S batteries, including the low conductivity of sulfur and its discharge products (Li 2 S/Li 2 S 2 ), volume expansion of sulfur electrode, and the polysulfide shuttle effect. Hence, immense attention has been devoted to rectifying these issues, of which the application of metal-based compounds (i.e., transition metal, metal phosphides, sulfides, oxides, carbides...

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Transition Metal Compounds Family for Li–S Batteries: The DFT‐Guide for Suppressing Polysulfides Shuttle

Wang

Yao

et al. 2023

Adv Funct Materials

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Lithium–sulfur batteries (LSBs) are considered as one of the best candidates for the next generation of high‐energy‐density storage devices owing to their superior theoretical energy density, high specific capacity, and sufficient sulfur reservoirs. However, the shuttle effect of soluble polysulfides and sluggish LiPSs redox kinetics restrict the further application of LSBs. The polysulfides shuttle effect can be efficiently alleviated and LiPSs conversion kinetics be accelerated by designing optimal transition metal compounds (TMCs) as multifunctional catalyst materials. Herein, recent advances about TMCs in LSBs are systematically summarized and analyzed. First of all, the intrinsic structural characteristics of TMCs and relevant application on their works to the adsorption energies studies are described in detail. Second, the bonding manners and structural properties are analyzed by density functional theory (DFT)‐guided calculations, focusing on the adsorption and diffusion behavior between TMCs and LiPSs. Furthermore, the mechanism of LiPSs redox reaction conversion is studied from kinetics aspects, thus developing the continuous dynamic analysis on “adsorption–diffusion–conversion” toward LiPSs. Eventually, this study particularly highlights the importance of modification engineering and provides a forward‐looking overview for its further application prospects by introduction of the previous advanced studies in LSBs.

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ReS2 nanosheets anchored on rGO as an efficient polysulfides immobilizer and electrocatalyst for Li-S batteries

Cited by 27 publications

References 62 publications

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Lithium–Sulfur Battery Cathode Design: Tailoring Metal‐Based Nanostructures for Robust Polysulfide Adsorption and Catalytic Conversion

Transition Metal Compounds Family for Li–S Batteries: The DFT‐Guide for Suppressing Polysulfides Shuttle

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ReS2 nanosheets anchored on rGO as an efficient polysulfides immobilizer and electrocatalyst for Li-S batteries

Cited by 27 publications

References 62 publications

1T′‐ReS2 Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

1T′‐ReS2 Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

Lithium–Sulfur Battery Cathode Design: Tailoring Metal‐Based Nanostructures for Robust Polysulfide Adsorption and Catalytic Conversion

Transition Metal Compounds Family for Li–S Batteries: The DFT‐Guide for Suppressing Polysulfides Shuttle

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1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries

1T′‐ReS₂ Nanosheets In Situ Grown on Carbon Nanotubes as a Highly Efficient Polysulfide Electrocatalyst for Stable Li–S Batteries