Entrapping polysulfides by using ultrathin hollow carbon sphere-functionalized separators in high-rate lithium-sulfur batteries

2018 ◽  
Vol 6 (34) ◽  
pp. 16610-16616 ◽  
Author(s):  
Jianjun Song ◽  
Chaoyue Zhang ◽  
Xin Guo ◽  
Jinqiang Zhang ◽  
Linqu Luo ◽  
...  
Keyword(s):  
High Rate ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Hollow Carbon Sphere ◽  
Lithium Sulfur Batteries ◽  
Overall Performance ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Lithium Sulfur

Novel ultrathin hollow carbon spheres with a nonporous shell are employed as polysulfide reservoirs to improve the overall performance of Li-S batteries.

scholarly journals Confine sulfur in double-hollow carbon sphere integrated with carbon nanotubes for advanced lithium–sulfur batteries

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Maru Dessie Walle ◽  
You-Nian Liu
Keyword(s):  
Carbon Nanotubes ◽  
Coulombic Efficiency ◽  
Specific Capacity ◽  
High Energy ◽  
High Energy Density ◽  
Carbon Sphere ◽  
Hollow Carbon Sphere ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Lithium Sulfur

AbstractThe lithium–sulfur (Li–S) batteries are promising because of the high energy density, low cost, and natural abundance of sulfur material. Li–S batteries have suffered from severe capacity fading and poor cyclability, resulting in low sulfur utilization. Herein, S-DHCS/CNTs are synthesized by integration of a double-hollow carbon sphere (DHCS) with carbon nanotubes (CNTs), and the addition of sulfur in DHCS by melt impregnations. The proposed S-DHCS/CNTs can effectively confine sulfur and physically suppress the diffusion of polysulfides within the double-hollow structures. CNTs act as a conductive agent. S-DHCS/CNTs maintain the volume variations and accommodate high sulfur content 73 wt%. The designed S-DHCS/CNTs electrode with high sulfur loading (3.3 mg cm−2) and high areal capacity (5.6 mAh mg cm−2) shows a high initial specific capacity of 1709 mAh g−1 and maintains a reversible capacity of 730 mAh g−1 after 48 cycles at 0.2 C with high coulombic efficiency (100%). This work offers a fascinating strategy to design carbon-based material for high-performance lithium–sulfur batteries.

Functionalized N-doped hollow carbon spheres as sulfur host with enhanced electrochemical performances of lithium-sulfur batteries

Ionics ◽  
2018 ◽  
Vol 25 (2) ◽  
pp. 503-511 ◽  
Author(s):  
Xiaoping Li ◽  
Zhenghui Pan ◽  
Zihao Li ◽  
Yaotang Zhong ◽  
Xianshu Wang ◽  
...  
Keyword(s):  
Electrochemical Performances ◽  
Carbon Spheres ◽  
Lithium Sulfur Batteries ◽  
Sulfur Host ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Lithium Sulfur

Nitrogen-doped porous hollow carbon sphere-decorated separators for advanced lithium–sulfur batteries

2015 ◽  
Vol 300 ◽  
pp. 157-163 ◽  
Author(s):  
Zhian Zhang ◽  
Guanchao Wang ◽  
Yanqing Lai ◽  
Jie Li ◽  
Zhiyong Zhang ◽  
...  
Keyword(s):  
Carbon Sphere ◽  
Nitrogen Doped ◽  
Hollow Carbon Sphere ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Lithium Sulfur

Encapsulating sulfur into highly graphitized hollow carbon spheres as high performance cathode for lithium–sulfur batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (100) ◽  
pp. 98035-98041 ◽  
Author(s):  
Shuangke Liu ◽  
Xiaobin Hong ◽  
Yujie Li ◽  
Jing Xu ◽  
Chunman Zheng ◽  
...  
Keyword(s):  
High Performance ◽  
High Capacity ◽  
Carbon Sphere ◽  
Carbon Spheres ◽  
Capacity Retention ◽  
High Discharge ◽  
High Discharge Capacity ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres

Encapsulating sulfur into a highly graphitized hollow carbon sphere (GHCS) is proposed as sulfur cathode, the S@GHCS delivers a high discharge capacity of ∼800 mA h g−1at 4C rate and high capacity retention of 93.7% after 240 cycles.

scholarly journals Mesoporous hollow carbon spheres for lithium–sulfur batteries: distribution of sulfur and electrochemical performance

2016 ◽  
Vol 7 ◽  
pp. 1229-1240 ◽  
Author(s):  
Anika C Juhl ◽  
Artur Schneider ◽  
Boris Ufer ◽  
Torsten Brezesinski ◽  
Jürgen Janek ◽  
...  
Keyword(s):  
High Vacuum ◽  
Cycling Performance ◽  
Carbon Spheres ◽  
X Ray Diffraction ◽  
Composite Cathodes ◽  
Lithium Sulfur Batteries ◽  
Cavity Filling ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Lithium Sulfur

Hollow carbon spheres (HCS) with a nanoporous shell are promising for the use in lithium–sulfur batteries because of the large internal void offering space for sulfur and polysulfide storage and confinement. However, there is an ongoing discussion whether the cavity is accessible for sulfur. Yet no valid proof of cavity filling has been presented, mostly due to application of unsuitable high-vacuum methods for the analysis of sulfur distribution. Here we describe the distribution of sulfur in hollow carbon spheres by powder X-ray diffraction and Raman spectroscopy along with results from scanning electron microscopy and nitrogen physisorption. The results of these methods lead to the conclusion that the cavity is not accessible for sulfur infiltration. Nevertheless, HCS/sulfur composite cathodes with areal sulfur loadings of 2.0 mg·cm−2 were investigated electrochemically, showing stable cycling performance with specific capacities of about 500 mAh·g−1 based on the mass of sulfur over 500 cycles.

Confining Sulfur in Double-Shelled Hollow Carbon Spheres for Lithium-Sulfur Batteries

2012 ◽  
Vol 124 (38) ◽  
pp. 9730-9733 ◽  
Author(s):  
Chaofeng Zhang ◽  
Hao Bin Wu ◽  
Changzhou Yuan ◽  
Zaiping Guo ◽  
Xiong Wen David Lou
Keyword(s):  
Carbon Spheres ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Lithium Sulfur

ChemInform Abstract: Confining Sulfur in Double-Shelled Hollow Carbon Spheres for Lithium-Sulfur Batteries.

ChemInform ◽  
2013 ◽  
Vol 44 (2) ◽  
pp. no-no
Author(s):  
Chaofeng Zhang ◽  
Hao Bin Wu ◽  
Changzhou Yuan ◽  
Zaiping Guo ◽  
Xiong Wen Lou
Keyword(s):  
Carbon Spheres ◽  
Lithium Sulfur Batteries ◽  
Hollow Carbon ◽  
Hollow Carbon Spheres ◽  
Lithium Sulfur
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