Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
6609566 | Electrochimica Acta | 2016 | 31 Pages |
Abstract
A sulfur-carbon composite from sulfur and carbon aerogel decorated with ultrafine CeO2 nanoparticles has been prepared by a conventional sol-gel strategy as a host material of the sulfur cathodes for lithium-sulfur batteries. The physical and electrochemical properties of the prepared composite materials have been evaluated by X-ray diffraction, scanning electron microscopy, transmission electron microscopy, N2 sorption isotherms, X-ray photoelectron spectroscopy and electrochemical measurements. Apart from offering flexible confinement function, carbon aerogels decorated with CeO2 are also found to suppress the loss of polysulfide ions. The Ce2-CA/S cathode with Ce/C molar ratio of 0.0233 delivers high initial discharge capacity of 1381 mAh gâ1 at 0.2 C and remains 1127.6 mAh gâ1 after 100 cycles. The sulfur electrodes have excellent rate performance with initial discharge capacity of 768.5 mAh gâ1 at 5 C.
Related Topics
Physical Sciences and Engineering
Chemical Engineering
Chemical Engineering (General)
Authors
Xueliang Li, Lisheng Pan, Yiyi Wang, Congsheng Xu,