A general dissolution–recrystallization strategy to achieve sulfur-encapsulated carbon for an advanced lithium–sulfur battery

Fan, Xuliang; Zhang, Yangfan; Li, Jing; Yang, Kang; Liang, Zhongxin; Chen, Yaoguang; Zhao, Cunyuan; Zhang, Zishou; Mai, Kancheng

doi:10.1039/c8ta02180e

Cited by 41 publications

(18 citation statements)

References 38 publications

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“…In contrast to these efforts, a relatively overlooked factor is that the low-to-moderate compatibility of sulfur or sulfur-dissolved solution (typically, a sulfur/CS 2 solution) with carbon causes difficulty in completely loading sulfur into the porous carbon host (22,23). Recent studies have introduced various metal compounds for improved adsorption of PSs, but, due to their relatively low content, the compatibility with carbon surfaces is still important (24)(25)(26).…”

mentioning

confidence: 99%

Complete encapsulation of sulfur through interfacial energy control of sulfur solutions for high-performance Li−S batteries

Gueon

Moon

2020

Proc. Natl. Acad. Sci. U.S.A.

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Complete encapsulation of high-content sulfur in porous carbon is crucial for high performance Li−S batteries. To this end, unlike conventional approaches to control the pore of carbon hosts, we demonstrate controlling the interfacial energy of the solution in the process of penetrating the sulfur-dissolved solution. We unveil, experimentally and theoretically, that the interfacial energy with the carbon surface of the sulfur solution is the key to driving complete encapsulation of sulfur. In the infiltration of sulfur solutions withN-methyl-2-pyrrolidone, we achieve complete encapsulation of sulfur, even up to 85 wt %. The sulfur fully encapsulated cathode achieves markedly high volumetric capacity and stable cycle operation in its Li−S battery applications. We achieve a volumetric capacity of 855 mAh/cm3at 0.2C and a capacity reduction of 0.071% per cycle up to 300 cycles at 1C.

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mentioning

confidence: 99%

Complete encapsulation of sulfur through interfacial energy control of sulfur solutions for high-performance Li−S batteries

Gueon

Moon

2020

Proc. Natl. Acad. Sci. U.S.A.

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“…Carbon, metal compound and conductive polymer material are the most commonly matrix material owing to ideal conductivity, pore structure and sulfur adsorption strength. [7][8][9][10][11][12][13][14][15][16] Among these, TiO 2 is regarded as an ideal sulfur-loaded matrix material and is believed that TiO 2 /S composite electrode can effectively inhibit the shuttle effect of polysulfides as a result of the strong adsorption between Ti-O structure and sulfur, thus improving sulfur utilization and cycle life for lithium-sulfur batteries. As known to all, TiO 2 has a variety of microstructures, including rutile and anatase.…”

Section: Discussionmentioning

confidence: 99%

Influence of TiO ₂ /TiC composite materials with different crystal structures on the electrochemical properties as sulfur‐loaded matrix for lithium‐sulfur batteries

et al. 2020

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Summary Lithium‐sulfur battery is a type of high‐performance chemical power supply system, and the structure of composite substrate material will influence on the electrochemical properties of sulfur cathode active materials. In this paper, a TiO2/TiC composite substrate material with the different crystal structure by means of changing sintering temperature is synthesized and its physical properties and electrochemical performances have been researched. Through X‐ray diffraction analysis, it can be found that the crystal structures of TiC and TiO2 in the TiO2/TiC composite substrate material sinter at different temperature both have been changed obviously due to the strong interaction between the oxygen atom and titanium and carbon atoms. By comparison, when sintering at 600°C, the composite matrix material has higher crystallinity and they accordingly have some confusion after sintering at 500°C. Raman spectrum information displays that TiO2/TiC composite substrate materials with high crystallinity allow the loaded sulfur to enter the pores and it is easier to form a stable physical adsorption. However, TiO2/TiC composite substrate material with some confusion is easier to form chemical adsorption with sulfur. Electrochemical test results illustrate that the specific discharge capacities of TiO2/TiC composite substrate material with the higher crystallinity loaded 55% sulfur can be achieved to 1247.91 and 834.62 mAh g−1 at 0.1 and 0.5C, respectively. Then, after 300 times charge and discharge cycles at 0.2C, the discharge capacity retention rate of TiO2/TiC composite substrate material with some confusion loaded 45% sulfur can reach 54.40%. To sum up, we can conclude that the TiO2/TiC composite materials with different crystal structures will have a serious impact on the electrochemical performances of sulfur cathode for lithium‐sulfur batteries.

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“…39,40 Evolved from the traditional dissolutionrecrystallization route, a nucleation-recrystallization strategy was first introduced in 2018. 41 The initially dissolved sulfur is adsorbed onto a single-walled CNT to act as a crystal nucleus and induce the subsequent sulfur recrystallization, generating a uniform sulfur layer eventually. Owing to the strong interfacial interaction between sulfur and carbon substrates, the resultant free-standing cathodes showed excellent structural durability and rate performance.…”

Section: Dissolution-recrystallization Methodsmentioning

confidence: 99%

Designing principles of advanced sulfur cathodes toward practical lithium‐sulfur batteries

Zhang

2022

SusMat

101

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As one of the most promising candidates for next-generation energy storage systems, lithium-sulfur (Li-S) batteries have gained wide attention owing to their ultrahigh theoretical energy density and low cost. Nevertheless, their road to commercial application is still full of thorns due to the inherent sluggish redox kinetics and severe polysulfides shuttle. Incorporating sulfur cathodes with adsorbents/catalysts has been proposed to be an effective strategy to address the foregoing challenges, whereas the complexity of sulfur cathodes resulting from the intricate design parameters greatly influences the corresponding energy density, which has been frequently ignored. In this review, the recent progress in design strategies of advanced sulfur cathodes is summarized and the significance of compatible regulation among sulfur active materials, tailored hosts, and elaborate cathode configuration is clarified, aiming to bridge the gap between fundamental research and practical application of Li-S batteries. The representative strategies classified by sulfur encapsulation, host architecture, and cathode configuration are first highlighted to illustrate their synergetic contribution to the electrochemical performance improvement. Feasible integration principles are also proposed to guide the practical design of advanced sulfur cathodes. Finally, prospects and future directions are provided to realize high energy density and long-life Li-S batteries.

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A general dissolution–recrystallization strategy to achieve sulfur-encapsulated carbon for an advanced lithium–sulfur battery

Abstract: A novel dissolution–recrystallization strategy is, for the first time, proposed to fabricate a series of carbon@S cathodes via dissolution–recrystallization of granular sulfur into uniform sulfur layer encapsulated carbon in selective solution.

Cited by 41 publications

References 38 publications

Complete encapsulation of sulfur through interfacial energy control of sulfur solutions for high-performance Li−S batteries

Complete encapsulation of sulfur through interfacial energy control of sulfur solutions for high-performance Li−S batteries

Influence of TiO ₂ /TiC composite materials with different crystal structures on the electrochemical properties as sulfur‐loaded matrix for lithium‐sulfur batteries

Designing principles of advanced sulfur cathodes toward practical lithium‐sulfur batteries

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A general dissolution–recrystallization strategy to achieve sulfur-encapsulated carbon for an advanced lithium–sulfur battery

Abstract: A novel dissolution–recrystallization strategy is, for the first time, proposed to fabricate a series of carbon@S cathodes via dissolution–recrystallization of granular sulfur into uniform sulfur layer encapsulated carbon in selective solution.

Cited by 41 publications

References 38 publications

Complete encapsulation of sulfur through interfacial energy control of sulfur solutions for high-performance Li−S batteries

Complete encapsulation of sulfur through interfacial energy control of sulfur solutions for high-performance Li−S batteries

Influence of TiO 2 /TiC composite materials with different crystal structures on the electrochemical properties as sulfur‐loaded matrix for lithium‐sulfur batteries

Designing principles of advanced sulfur cathodes toward practical lithium‐sulfur batteries

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Influence of TiO ₂ /TiC composite materials with different crystal structures on the electrochemical properties as sulfur‐loaded matrix for lithium‐sulfur batteries