title: New Redox Polymers that Exhibit Reversible Cleavage of Sulfur Bonds as Cathode Materials.
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-1at C/5 over 100 cycles with approximately 98 % Coulombic efficiency.
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.|Departamento de Química Inorgánica, UPV/EHU, P.O.Box.644, 48080, Bilbao, Spain.
authors: Marya
authors: M
authors: Baloch
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.
authors: Hicham
authors: H
authors: Ben Youcef
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.
authors: Chunmei
authors: C
authors: Li
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.
authors: Oihane
authors: O
authors: Garcia-Calvo
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.
authors: Lide M
authors: LM
authors: Rodriguez
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.
authors: Devaraj
authors: D
authors: Shanmukaraj
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.|Departamento de Química Inorgánica, UPV/EHU, P.O.Box.644, 48080, Bilbao, Spain.
authors: Teofilo
authors: T
authors: Rojo
authors: CIC Energigune, Parque Tecnológico de Álava, Albert Einstein 48, CIC, 01510, Miñano, Álava, Spain.
authors: Michel
authors: M
authors: Armand
mesh_terms: D004563:Electrochemistry; D004566:Electrodes; D007700:Kinetics; D010084:Oxidation-Reduction; D011108:Polymers / Q000737:chemistry*; D013455:Sulfur / Q000737:chemistry*
chemical_list: D011108:Polymers; D013455:Sulfur
keywords: cathode materials; electrochemistry; lithium; polymers; sulfur heterocycles