Dipolar and catalytic effects of an Fe3O4 based nitrogen-doped hollow carbon sphere framework for high performance lithium sulfur batteries

Author(s):  
Shungui Deng ◽  
Qihua Li ◽  
Yanhua Chen ◽  
Chao Wang ◽  
Hongbin Zhao ◽  
...  

Well-designed hollow carbon sphere with embedded Fe3O4 nanoparticles is fabricated as sulfur host for Li–S batteries. The high catalytic activity of Fe3O4 can accelerate the redox conversion of polysulfide, facilitating the reaction kinetics.

2020 ◽  
Vol 44 (15) ◽  
pp. 5965-5971
Author(s):  
Qihua Li ◽  
Jian Yang ◽  
Yue Zhao ◽  
Zengcheng Zhang ◽  
Chao Wang ◽  
...  

Co, N@CPDA-HCS exhibits better electrochemical performance due to the embedding of cobalt on the special structure as a host for sulfur.


Author(s):  
Maru Dessie Walle ◽  
You-Nian Liu

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.


2015 ◽  
Vol 300 ◽  
pp. 157-163 ◽  
Author(s):  
Zhian Zhang ◽  
Guanchao Wang ◽  
Yanqing Lai ◽  
Jie Li ◽  
Zhiyong Zhang ◽  
...  

2018 ◽  
Vol 284 ◽  
pp. 89-97 ◽  
Author(s):  
Yongzheng Zhang ◽  
Xiaolin Zong ◽  
Liang Zhan ◽  
Xiaoye Yu ◽  
Jin Gao ◽  
...  

2018 ◽  
Vol 6 (34) ◽  
pp. 16610-16616 ◽  
Author(s):  
Jianjun Song ◽  
Chaoyue Zhang ◽  
Xin Guo ◽  
Jinqiang Zhang ◽  
Linqu Luo ◽  
...  

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


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