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- Title
New Redox Polymers that Exhibit Reversible Cleavage of Sulfur Bonds as Cathode Materials.
- Authors
Baloch, Marya; Ben Youcef, Hicham; Li, Chunmei; Garcia‐Calvo, Oihane; Rodriguez, Lide M.; Shanmukaraj, Devaraj; Rojo, Teofilo; Armand, Michel
- Abstract
Two new cathode materials based on redox organosulfur polymers were synthesized and investigated for rechargeable lithium batteries as a proof-of-concept study. These cathodes offered good cycling performance owing to the absence of polysulfide solubility, which plagues Li/S systems. Herein, an aliphatic polyamine or a conjugated polyazomethine was used as the base to tether the redox-active species. The activity comes from the cleavage and formation of S−S or N−S bonds, which is made possible by the rigid conjugated backbone. The synthesized polymers were characterized through FTIR spectroscopy and thermogravimetric analysis (TGA). Galvanostatic measurements were performed to evaluate the discharge/charge cycles and characterize the performance of the lithium-based cells, which displayed initial discharge capacities of approximately 300 mA h g−1 at C/5 over 100 cycles with approximately 98 % Coulombic efficiency.
- Subjects
REDOX polymers; SCISSION (Chemistry); SULFUR bonding; LITHIUM cells; SOLUBILITY; POLYAMINES
- Publication
ChemSusChem, 2016, Vol 9, Issue 22, p3206
- ISSN
1864-5631
- Publication type
Article
- DOI
10.1002/cssc.201601032