scholarly journals A sulfur host based on titanium monoxide@carbon hollow spheres for advanced lithium–sulfur batteries

2016 ◽  
Vol 7 (1) ◽  
Author(s):  
Zhen Li ◽  
Jintao Zhang ◽  
Buyuan Guan ◽  
Da Wang ◽  
Li-Min Liu ◽  
...  
Keyword(s):  
Hollow Spheres ◽  
Titanium Monoxide ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Carbon Hollow Spheres ◽  
Lithium Sulfur

scholarly journals Encapsulation of Few-Layer MoS2 in the Pores of Mesoporous Carbon Hollow Spheres for Lithium-Sulfur Batteries

Nanomaterials ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 1247 ◽  
Author(s):  
Yunyan Zhao ◽  
Qianyu Zhuang ◽  
Wenda Li ◽  
Hongrui Peng ◽  
Guicun Li ◽  
...  
Keyword(s):  
Hollow Sphere ◽  
Mesoporous Carbon ◽  
Inorganic Compounds ◽  
Hollow Spheres ◽  
Functional Materials ◽  
Electrochemical Performances ◽  
Impregnation Method ◽  
Lithium Sulfur Batteries ◽  
Carbon Hollow Spheres ◽  
Lithium Sulfur

Integrating a highly conductive carbon host and polar inorganic compounds has been widely reported to improve the electrochemical performances for promising low-cost lithium sulfur batteries. Herein, a MoS2/mesoporous carbon hollow sphere (MoS2/MCHS) structure has been proposed as an efficient sulfur cathode via a simple wet impregnation method and gas phase vulcanization method. Multi-fold structural merits have been demonstrated for the MoS2/MCHS structures. On one hand, the mesoporous carbon hollow sphere (MCHS) matrix, with abundant pore structures and high specific surface areas, could load a large amount of sulfur, improve the electronical conductivity of sulfur electrodes, and suppress the volume changes during the repeated sulfur conversion processes. On the other hand, ultrathin multi-layer MoS2 nanosheets are revealed to be uniformly distributed in the mesoporous carbon hollow spheres, enhancing the physical adsorption and chemical entrapment functionalities towards the soluble polysulfide species. Having benefited from these structural advantages, the sulfur-impregnated MoS2/MCHS cathode presents remarkably improved electrochemical performances in terms of lower voltage polarization, higher reversible capacity (1094.3 mAh g−1), higher rate capability (590.2 mAh g−1 at 2 C), and better cycling stability (556 mAh g−1 after 400 cycles at 2 C) compared to the sulfur-impregnated MCHS cathode. This work offers a novel delicate design strategy for functional materials to achieve high performance lithium sulfur batteries.

Macroporous Multichannel Carbon Nanofibers Embedded with Co/Fe‐N Electrocatalyst as the Sulfur Host for Boosting Polysulfides Conversion in Lithium‐Sulfur Batteries

2021 ◽  
Vol 6 (24) ◽  
pp. 5932-5940
Author(s):  
Zhiliang Zhang ◽  
Jie Xu ◽  
Waqas Ahmed ◽  
Weiqiang Tang ◽  
Dongfang Niu ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur

Porous TiO2−x with oxygen deficiency as sulfur host for lithium–sulfur batteries

2021 ◽  
pp. 2143004
Author(s):  
Yuman Yang ◽  
Yi Zhang ◽  
Meng Yang ◽  
Xiangyu Zhao
Keyword(s):  
Oxygen Deficiency ◽  
Reversible Capacity ◽  
Polar Compounds ◽  
High Specific Surface Area ◽  
Chemical Adsorption ◽  
Sulfur Species ◽  
Host Materials ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Lithium Sulfur

The dissolution and shuttle behavior of lithium polysulfides has been considered to be one of the serious problems restricting the development of lithium−sulfur (Li–S) batteries. Polar compounds are regarded as promising sulfur host materials due to their strong chemical adsorption to lithium polysulfides. Herein, polar TiO[Formula: see text] with porous structure is employed as the sulfur host, which has a high specific surface area and provides nanoconfined space for storage and adsorption of sulfur species. As a result, the as-prepared S@TiO[Formula: see text] cathode exhibits significantly enhanced reversible capacity, cycling stability, and reaction kinetics compared to those of the as-prepared S@TiO2 cathode.

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