Nickel‐Salen Type Polymers as Cathode Materials for Rechargeable Lithium Batteries. Issue 24 (4th October 2017)

• Record Type: Journal Article
• Authors: Eliseeva, Svetlana N.; Alekseeva, Elena V.; Vereshchagin, Anatoliy A.; Volkov, Alexey I.; Vlasov, Petr S.; Konev, Alexander S.; Levin, Oleg V.
• Is Part Of: Macromolecular chemistry and physics. Volume 218:Issue 24(2017)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-10-04
• Subjects: conducting polymers -- electrochemical properties -- monocomponent electrode material -- [Ni(salen)] -- organic rechargeable Li battery; Polymers -- Periodicals; Polymerization -- Periodicals; Synthetic products -- Periodicals; Macromolecules -- Periodicals; 547.7
• DOI: 10.1002/macp.201700361
• Languages: English
• ISSNs: 1022-1352

Abstract

Abstract: The nickel salen‐type redox polymers represent an interesting class of organometallic polymers frequently used in hybrid supercapacitor electrodes as thin films and carbon material composites. However, the suitability of these compounds for application as electrode materials for rechargeable batteries has not yet been tested. In this study, redox processes in monocomponent electrodes based on a series of nickel salen‐type redox polymers are investigated in 1m LiPF6 in 1:1 ethylene carbonate (EC)/diethyl carbonate (DEC) electrolyte in a Li‐ion battery. The oxidation potentials for polymer complexes of nickel exceed 3.5 V versus Li/Li +, which enhances specific energy. It is found that introduction of a proper substituent in the phenyl ring of the ligand allows to fabricate additive‐free electrodes which demonstrate high charge/discharge rate performance with the capacity on discharge at 10 C being up to 73% of the capacity obtained at discharge at 1 C, which corresponds to maximum power of 2.6 kW kg −1 . Abstract : Monocomponent, free‐of‐carbon additives, poly[Ni(Schiff)]‐based electrodes are created for use in Li‐batteries. Their performance depends on the ligand structure. The methyl‐substituted compound shows the best results. High rate of charge/discharge processes is achieved, comprising 73% capacity retention at 10 C .