Design and synthesis of novel sandwich-type C@TiO<sub>2</sub>@C hollow microspheres as efficient sulfur hosts for advanced lithium–sulfur batteries

Fang, Mingming; Chen, Zhimin; Liu, Yuan; Quan, Junpeng; Yang, Chong; Zhu, Lichen; Xu, Qiaobing; Xu, Qun

doi:10.1039/c7ta08864g

Cited by 80 publications

(41 citation statements)

References 52 publications

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“…Compared with C-MoS2/rGO-S, the significant improvement of the capacity of C-MoS2/rGO-6-S electrodes can be attributed to the annealing treatment, which can not only reduce amorphous carbon and GO but also enhance synergistic effects and thus results in additional powerful polar-polar chemical interaction rather than only the weak physical adsorption for the polysulfides [8]. The galvanostatic discharge-charge curves of C-MoS2/rGO-6-S at several current densities are illustrated in Fig.…”

Section: Resultsmentioning

confidence: 99%

“…In order to overcome the problems above, great efforts have been applied to enhance the performance of Li-S batteries, including combining conductive materials with sulfur [6][7][8], constructing Li2Sn blocking interlayers [9][10][11], and applying functional separators [12][13][14][15]. Although there are many methods, the most usual strategy is to combine sulfur with various carbon materials owing to their excellent conductivity and flexible nanostructures.…”

Section: Introductionmentioning

confidence: 99%

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Design and facile synthesis of defect rich C-MoS₂/rGO nanosheets for enhanced lithium-sulfur battery performance

Tian¹,

Ji²,

Ma³

et al. 2019

Preprint

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Reliable design and fabrication of advanced electrode materials are vital for developing lithium sulfur batteries. In this contribution, we report a simple one-step hydrothermal strategy for fabrication of a C-MoS2/rGO composite with both large surface area and high porosity. Double modified defect-rich MoS2 nanosheets are successfully prepared by introducing graphene oxide (GO) and amorphous carbon. The conductibility and structural stabilization of the cathodes can be improved owing to combination between the amorphous carbon and rGO, which could also restrain the dissolution of polysulfides. After annealing at different temperatures, it is found that the C-MoS2/rGO-6-S composite annealed at 600 oC delivers noticeably enhanced the performance of lithium-sulfur batteries, with a high specific capacity of 572 mAh·g-1 at 0.2C after 550 cycles, and 551 mAh·g-1 even at 2C, much better than those of MoS2-S nanosheets (249 mAh·g-1 and 149 mAh·g-1) and C-MoS2/rGO-S composite (334 mAh·g-1 and 382 mAh·g-1). Our intended electrode design protocol and annealing process may pave the way for the construction of other high-performance metal disulphide electrode for electrochemical energy storage.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Design and facile synthesis of defect rich C-MoS₂/rGO nanosheets for enhanced lithium-sulfur battery performance

Tian¹,

Ji²,

Ma³

et al. 2019

Preprint

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“…Taking advantage of the hard‐templating method widely used for core/shell and yolk/shell structures is another effective strategy for combining HPCM with polar inorganic materials . Lou and co‐workers reported the synthesis of hollow‐structured TiO@C spheres by the reduction of hollow‐structured TiO 2 @C spheres (Figure c) .…”

Section: Sulfur Cathodes Based On Hollow Porous Carbon Materialsmentioning

confidence: 99%

Recent Advances in Hollow Porous Carbon Materials for Lithium–Sulfur Batteries

Wang

Pei

et al. 2019

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357

184

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Lithium–sulfur (Li–S) batteries are considered as one of the most potential next‐generation rechargeable batteries due to their high theoretical energy density. However, some critical issues, such as low capacity, poor cycling stability, and safety concerns, must be solved before Li–S batteries can be used practically. During the past decade, tremendous efforts have been devoted to the design and synthesis of electrode materials. Benefiting from their tunable structural parameters, hollow porous carbon materials (HPCM) remarkably enhance the performances of both sulfur cathodes and lithium anodes, promoting the development of high‐performance Li–S batteries. Here, together with the templated synthesis of HPCM, recent progresses of Li–S batteries based on HPCM are reviewed. Several important issues in Li–S batteries, including sulfur loading, polysulfide entrapping, and Li metal protection, are discussed, followed by a summary on recent research on HPCM‐based sulfur cathodes, modified separators, and lithium anodes. After the discussion on emerging technical obstacles toward high‐energy Li–S batteries, prospects for the future directions of HPCM research in the field of Li–S batteries are also proposed.

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“…Polar transition metal compounds, such as oxides, [ 14 ] sulfides, [ 15 ] nitrides, [ 16 ] and phosphides, [ 17 ] have been widely applied depending on their strong chemical adsorption toward polysulfides. In recent years, some transition metal compounds, such as TiO 2 , [ 18 ] MoP, [ 19 ] CoS 2 [ 20 ] and TiS 2 , [ 21 ] not only show the strong adsorption toward polysulfides but also exhibit the ability to improve reaction kinetics of polysulfides conversion. “Shuttle effect” can be further mitigated by catalyzing soluble polysulfides to insoluble Li 2 S 2 and Li 2 S. [ 22 ] This could greatly reduce overpotential, improve the utilization of sulfur and cycling stability of LSBs.…”

Section: Introductionmentioning

confidence: 99%

Oxygen‐Deficient Ferric Oxide as an Electrochemical Cathode Catalyst for High‐Energy Lithium–Sulfur Batteries

Wang

et al. 2020

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Lithium–sulfur batteries, as one of promising next‐generation energy storage devices, hold great potential to meet the demands of electric vehicles and grids due to their high specific energy. However, the sluggish kinetics and the inevitable “shuttle effect” severely limit the practical application of this technology. Recently, design of composite cathode with effective catalysts has been reported as an essential way to overcome these issues. In this work, oxygen‐deficient ferric oxide (Fe2O3−x), prepared by lithiothermic reduction, is used as a low‐cost and effective cathodic catalyst. By introducing a small amount of Fe2O3−x into the cathode, the battery can deliver a high capacity of 512 mAh g−1 over 500 cycles at 4 C, with a capacity fade rate of 0.049% per cycle. In addition, a self‐supporting porous S@KB/Fe2O3−x cathode with a high sulfur loading of 12.73 mg cm−2 is prepared by freeze‐drying, which can achieve a high areal capacity of 12.24 mAh cm−2 at 0.05 C. Both the calculative and experimental results demonstrate that the Fe2O3−x has a strong adsorption toward soluble polysulfides and can accelerate their subsequent conversion to insoluble products. As a result, this work provides a low‐cost and effective catalyst candidate for the practical application of lithium–sulfur batteries.

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Design and synthesis of novel sandwich-type C@TiO₂@C hollow microspheres as efficient sulfur hosts for advanced lithium–sulfur batteries

Abstract: Novel sandwich-type C@TiO2@C nanostructures were designed as efficient sulfur hosts for advanced lithium–sulfur batteries.

Cited by 80 publications

References 52 publications

Design and facile synthesis of defect rich C-MoS₂/rGO nanosheets for enhanced lithium-sulfur battery performance

Design and facile synthesis of defect rich C-MoS₂/rGO nanosheets for enhanced lithium-sulfur battery performance

Recent Advances in Hollow Porous Carbon Materials for Lithium–Sulfur Batteries

Oxygen‐Deficient Ferric Oxide as an Electrochemical Cathode Catalyst for High‐Energy Lithium–Sulfur Batteries

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Design and synthesis of novel sandwich-type C@TiO2@C hollow microspheres as efficient sulfur hosts for advanced lithium–sulfur batteries

Abstract: Novel sandwich-type C@TiO2@C nanostructures were designed as efficient sulfur hosts for advanced lithium–sulfur batteries.

Cited by 80 publications

References 52 publications

Design and facile synthesis of defect rich C-MoS2/rGO nanosheets for enhanced lithium-sulfur battery performance

Design and facile synthesis of defect rich C-MoS2/rGO nanosheets for enhanced lithium-sulfur battery performance

Recent Advances in Hollow Porous Carbon Materials for Lithium–Sulfur Batteries

Oxygen‐Deficient Ferric Oxide as an Electrochemical Cathode Catalyst for High‐Energy Lithium–Sulfur Batteries

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Design and synthesis of novel sandwich-type C@TiO₂@C hollow microspheres as efficient sulfur hosts for advanced lithium–sulfur batteries

Design and facile synthesis of defect rich C-MoS₂/rGO nanosheets for enhanced lithium-sulfur battery performance

Design and facile synthesis of defect rich C-MoS₂/rGO nanosheets for enhanced lithium-sulfur battery performance