We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
A Facile Synthesis of High-Surface-Area Sulfur-Carbon Composites for Li/S Batteries.
- Authors
Kaiser, Mohammad Rejaul; Liang, Xin; Konstantinov, Konstantin; Liu, Hua ‐ Kun; Dou, Shi ‐ Xue; Wang, Jia ‐ Zhao
- Abstract
Small-grained elemental sulfur is precipitated from sodium thiosulfate (Na2S2O3) in a carbon-containing oxalic acid (HOOCCOOH) solution through a novel spray precipitation method. Surface area analysis, elemental mapping, and transmission electron micrographs revealed that the spray-precipitated sulfur particles feature 11 times higher surface area compared to conventional precipitated sulfur, with homogeneous distribution in the carbon. Moreover, the scanning electron micrographs show that these high-surface-area sulfur particles are firmly adhered to and covered by carbon. This precipitated S-C composite exhibits high discharge capacity with about 75 % capacity retention. The initial discharge capacity was further improved to 1444 mA h g−1 by inserting a free-standing single-walled carbon nanotube layer in between the cathode and the separator. Moreover, with the help of the fixed capacity charging technique, 91.6 % capacity retention was achieved.
- Subjects
CHEMICAL synthesis; CARBON composites; LITHIUM cells; COMPOSITE materials; CHALCOGENS
- Publication
Chemistry - A European Journal, 2015, Vol 21, Issue 28, p10061
- ISSN
0947-6539
- Publication type
Article
- DOI
10.1002/chem.201500429