Polymeric multilayer-modified manganese dioxide with hollow porous structure as sulfur host for lithium sulfur batteries

He, Meizi; Zuo, Pengjian; Zhang, Han; Hua, Junfu; Ma, Yulin; Cheng, Xinqun; Gao, Yunzhi; Yin, Geping

doi:10.1016/j.electacta.2017.10.130

Cited by 26 publications

(10 citation statements)

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“…Because of the improved conductivity and redox kinetics, the H-TiO x @S/PPy cathode shows relatively high initial discharge/charge capacities of 1087/1050 mAh g –1 in comparison with the other counterparts, with a high initial Coulombic efficiency of 96.60%. Such results indicate favorable utilization of the active sulfur species during the redox process …”

Section: Resultsmentioning

confidence: 86%

“…Such results indicate favorable utilization of the active sulfur species during the redox process. 55 To further examine the facilitation of H-TiO x and PPy on the electrode conductivity and redox kinetics, rate-performance tests of H-TiO x @S/PPy, H-TiO x @S, TiO 2 @S, and CNT@S cathodes were conducted by gradually increasing the charge/ discharge current density from 0.1 to 1C (every 10 cycles) and reverting to 0.1C; the test results are shown in Figure 3d. When the current rates rise from 0.1 to 1C, the specific capacities of H-TiO x @S/PPy at 0.1, 0.2, 0.3, 0.5, and 1C are 1130, 990, 932, 862, and 726 mAh g −1 , respectively, which are generally higher than those of H-TiO x @S, TiO 2 @S, and CNT@S cathodes.…”

Section: Resultsmentioning

confidence: 99%

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Rational Design of TiO–TiO₂ Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries

Chen¹,

Zhong²,

Li³

et al. 2019

ACS Appl. Mater. Interfaces

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Despite outstanding theoretical energy density (2600 Wh kg–1) and low cost of lithium–sulfur (Li–S) batteries, their practical application is seriously hindered by inferior cycle performance and low Coulombic efficiency due to the “shuttle effect” of lithium polysulfides (LiPSs). Herein, we proposed a strategy that combines TiO–TiO2 heterostructure materials (H-TiO x , x = 1, 2) and conductive polypyrrole (PPy) to form a multifunctional sulfur host. Initially, the TiO–TiO2 heterostructure can enhance the redox reaction kinetics of sulfur species and improve the conductivity of sulfur cathode together with the PPy coating layer. Moreover, the defect-abundant H-TiO x matrices can trap LiPSs by the formation of Ti–S bond via the Lewis acid–base interaction. Furthermore, the PPy coating can physically hinder the diffusion of LiPSs, as well as chemically adsorb LiPSs by the polar–polar mechanism. Benefiting from the synergistic effect of H-TiO x and PPy layer, the novel cathode delivered high specific capacities at different current rates (1130, 990, 932, 862, and 726 mAh g–1 at 0.1, 0.2, 0.3, 0.5, and 1C, respectively) and an ultralow capacity decay of 0.0406% per cycle after 1000 cycles at 1C. This work can not only indicate effectiveness of employing H-TiO x materials to realize the LiPSs immobilization but also shed light on the feasibility of combining different materials to achieve the multifunctional sulfur hosts for advanced Li–S batteries.

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Section: Resultsmentioning

confidence: 86%

Section: Resultsmentioning

confidence: 99%

Rational Design of TiO–TiO₂ Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries

Chen¹,

Zhong²,

Li³

et al. 2019

ACS Appl. Mater. Interfaces

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“…During the positive scan, one anodic peak presents, which is associated with the decomposition of lithium sulfide to elemental sulfur. 11,52 It is evident that the battery using LHCE (HCE/TTE = 1:4) exhibits sharper peaks and reduced polarization, especially with the second cathodic peak, indicating improved electrochemical reaction kinetics. It is more evident that the second cathodic peak disappears in the CV curves for the cell using the HCE cell at room temperature, indicating that the TTE supports accelerated kinetics for the reduction of the sulfur electrode (Figure S14).…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…1,3-Dioxolane (DOL), with relatively low LiPS solubility, is employed to build a more stable solid electrolyte interface (SEI) film to protect the Li anode. , Although the sulfur cathode reveals impressive reversibility in ether-based electrolytes, some crucial points are non-negligible: dissolution of LiPSs and relevant shuttle effect. Many efforts to mitigate this problem have been focused on tailoring the sulfur host structures and the components of the electrolyte. − …”

Section: Introductionmentioning

confidence: 99%

Flame-Retardant and Polysulfide-Suppressed Ether-Based Electrolytes for High-Temperature Li–S Batteries

Holmes

et al. 2021

ACS Appl. Mater. Interfaces

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Lithium–sulfur (Li–S) batteries are drawing huge attention as attractive chemical power sources. However, traditional ether-based solvents (DME/DOL) suffer from safety issues at high temperatures and serious parasitic reactions occur between the Li metal anodes and soluble lithium polysulfides (LiPSs). Herein, we propose a polysulfide-suppressed and flame-retardant electrolyte operated at high temperatures by introducing an inert diluent 1,1,2,2-tetrafluoroethyl-2,2,3,3-tetrafluoropropyl (TTE) into the high-concentration electrolyte (HCE). Li dendrites are also efficiently suppressed by the formed LiF-rich protective layer. Furthermore, the shuttle effect is mitigated by the decreased solubility of LiPSs. At 60 °C, Li–S batteries using this nonflammable ether-based electrolyte exhibit a high capacity of 666 mAh g–1 over 100 cycles at a current rate of 0.2C, showing the greatly improved high-temperature performance compared to batteries with traditional ether-based electrolytes. The improved electrochemical performance across a range of temperatures and the enhanced safety suggest that the electrolyte has a great practical prospect for safe Li–S batteries.

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“…The capacity decay per cycle was only 0.07%, and the Coulombic efficiency was as high as 95.7% (Figure (e) and (f)), and it was also highly reversible, with the electrode still providing 726.6 mAh·g –1 at current densities charged and discharged from 0.2 to 3 C and back to 0.2 C (Figure (g)). He et al further processed S@MnO 2 prepared by the melt diffusion method in the polymer solution and finally obtained the polymer multilayer-modified S@MnO 2 @PM composite material as the cathode material. The synthesis flowchart is shown in Figure (h).…”

Section: Single Metals and Compoundsmentioning

confidence: 99%

Overview of the Latest Developments and Perspectives about Noncarbon Sulfur Host Materials for High Performance Lithium–Sulfur Batteries

et al. 2022

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Lithium–sulfur (Li–S) batteries have attracted great attention in environmentally and friendly energy storage systems due to their excellent theoretical specific capacities and high energy densities. In addition, the element sulfur has a wide range of raw materials and low production costs and is considered to be a material with the most development potential. However, the poor electrical conductivity of sulfur, the volume expansion of sulfur during polarization, and the shuttle effect of lithium polysulfides (LiPSs) severely hinder the commercialization of Li–S batteries. Since carbon materials containing light nonpolar or weakly polar substances are used as sulfur hosts, there will be some difficulties in cycling stability, and the volumetric energy densities of Li–S batteries will be destroyed. In order to solve the existing problems, some polar substances are introduced into the cathode material to improve the cycle stability and effectively suppress the shuttle effect. This review presents polar materials commonly used in Li–S batteries, including single metals, metal nitrides, metal oxides, metal sulfides, and conducting polymers. Finally, this review not only summarizes the research directions and challenges of polar material applications but also looks forward to the development prospects of batteries, provides a pathway for the practical application of noncarbon sulfur host materials in Li–S batteries, and inspires more researchers to work on cathode materials.

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Polymeric multilayer-modified manganese dioxide with hollow porous structure as sulfur host for lithium sulfur batteries

Cited by 26 publications

References 50 publications

Rational Design of TiO–TiO₂ Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries

Rational Design of TiO–TiO₂ Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries

Flame-Retardant and Polysulfide-Suppressed Ether-Based Electrolytes for High-Temperature Li–S Batteries

Overview of the Latest Developments and Perspectives about Noncarbon Sulfur Host Materials for High Performance Lithium–Sulfur Batteries

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Polymeric multilayer-modified manganese dioxide with hollow porous structure as sulfur host for lithium sulfur batteries

Cited by 26 publications

References 50 publications

Rational Design of TiO–TiO2 Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries

Rational Design of TiO–TiO2 Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries

Flame-Retardant and Polysulfide-Suppressed Ether-Based Electrolytes for High-Temperature Li–S Batteries

Overview of the Latest Developments and Perspectives about Noncarbon Sulfur Host Materials for High Performance Lithium–Sulfur Batteries

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Product

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Rational Design of TiO–TiO₂ Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries

Rational Design of TiO–TiO₂ Heterostructure/Polypyrrole as a Multifunctional Sulfur Host for Advanced Lithium–Sulfur Batteries