MnO‐Inlaid hierarchically porous carbon hybrid for lithium‐sulfur batteries

Li, Weilin; Fan, Xiaojing; Xu, Bin; Chen, Peng; Tang, Dejian; Meng, Fancheng; Zhou, Rulong; Liu, Jiehua

doi:10.1002/nano.202000157

Cited by 11 publications

(2 citation statements)

References 42 publications

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“…The slash line in the low frequency region is related to the diffusion resistance (R e ), and generally the higher the slope, the lower the viscosity of the electrolyte and the lower the resistance of ion diffusion. The intersection of the starting point and the real axis is related to the electrolyte resistance 27 .…”

Section: Resultsmentioning

confidence: 99%

Nitrogen-doped hollow carbon sphere composite Mn3O4 as an advanced host for lithium-sulfur battery

Wang,

Liu,

et al. 2024

Sci Rep

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As the most promising advanced energy storage system, lithium-sulfur batteries (LSBs) are highly favored by the researchers because of their advantages of high energy density (2500 W h kg−1), low cost and non-pollution. However, the low conductivity, volume expansion of sulfur, and shuttle effect are still the great hindrance to the practical application of LSBs. Herein, the above problems can be addressed through the following strategies: (1) Hollow carbon microspheres with high specific surface area were constructed as sulfur hosts to increase sulfur loading while also being able to enhance the physical adsorption of polysulfides; (2) the loading of Mn3O4 particles on the basis of hollow carbon microspheres facilitates the capture and adsorption of polysulfides; (3) the hollow carbon sphere structure as a conductive network can provide more pathways for rapid electrical/ionic transport and also accelerate electrolyte wetting. Moreover, the thinner shell of hollow carbon microsphere is conducive to ion diffusion and speed up the reaction rate. Thus, the NHCS/Mn3O4/S composites exhibit a high discharge specific capacity of 1010.3 mAh g−1 at first and still maintained a reversible capacity of 269.2 mAh g−1 after 500 cycles. This work presents a facile sustainable and efficient synergistic strategy for the development of advanced LSBs.

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Section: Resultsmentioning

confidence: 99%

Nitrogen-doped hollow carbon sphere composite Mn3O4 as an advanced host for lithium-sulfur battery

Wang,

Liu,

et al. 2024

Sci Rep

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“…On the one hand, carbon materials with multi-pore size distribution and a high specific surface area are conducive to be used as the sulfur host in Li-S batteries, owing to the excellent accommodation capability of active substances. On the other hand, the co-existence of microporous and mesoporous structures can provide effective transport channels for both ions and electrons during the electrochemical process [49].…”

Section: Resultsmentioning

confidence: 99%

Yeast-Derived Sulfur Host for the Application of Sustainable Li–S Battery Cathode

Dou

et al. 2023

Batteries

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A porous carbon structure (PCS) is considered as an ideal electrode material for lithium–sulfur (Li–S) batteries, owing to its flexible texture, large surface area, and high electrical conductivity. In this work, we use food-grade yeast as the carbon precursor, which is proliferated in glucose solution, carbonized with a NaCl template to yield a sheet-like carbon structure, and reactivated at different temperatures with KOH. The porous carbon material is then applied as the sulfur host of the Li–S battery cathode, and the electrode is systematically characterized by means of SEM, TEM, XRD, Raman, XPS, thermogravimetric (TG), nitrogen gas adsorption–desorption, and electrochemical measurements. The results show that the PCS obtained at 800 °C has an ultra-high surface area of 2410 m2 g−1 and exhibits excellent performance for a Li–S battery cathode. The initial discharge capacity of the PCS-800/S cathode is 1502 mAh g−1, which accounts for 90% of the theoretical capacity value.

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Spherical Polyelectrolyte Brushes Templated Hollow C@MnO Nanospheres as Sulfur Host Materials for Li−S Batteries

et al. 2022

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LiÀ S battery has been considered as the nextgeneration energy storage device, which still suffers from the shuttle effect of lithium polysulfides (LiPSs). In this work, mesoporous hollow carbon-coated MnO nanospheres (C@MnO) have been designed and synthesized using spherical polyelectrolyte brushes (SPB) as template, KMnO 4 as MnO precursor, and polydopamine as carbon source to improve the electrochemical performance of LiÀ S battery. The hollow C@MnO nanospheres enable the combination of physical confinement and chemical adsorption of the LiPSs. The thin carbon coating layer can provide good electrical conductivity and additional physical confinement to polysulfides. Moreover, the encapsulated MnO inside the carbon shell exhibits strong chemical adsorption to polysulfides. The constructed C@MnO/S cathode shows the discharge capacity of 1026 mAh g À 1 at 0.1 C with 79% capacity retention after 80 cycles. The synthesized hollow C@MnO nanoparticles can work as highly efficient sulfur host materials, providing an effective solution to suppress the shuttle effect in LiÀ S battery.

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MnO‐Inlaid hierarchically porous carbon hybrid for lithium‐sulfur batteries

Cited by 11 publications

References 42 publications

Nitrogen-doped hollow carbon sphere composite Mn3O4 as an advanced host for lithium-sulfur battery

Nitrogen-doped hollow carbon sphere composite Mn3O4 as an advanced host for lithium-sulfur battery

Yeast-Derived Sulfur Host for the Application of Sustainable Li–S Battery Cathode

Spherical Polyelectrolyte Brushes Templated Hollow C@MnO Nanospheres as Sulfur Host Materials for Li−S Batteries

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