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Poly(vinylferrocene)-Reduced Graphene Oxide as a High Power/High Capacity Cathodic Battery Material

S. M. Beladi-Mousavi ; S. Sadaf ; L. Walder ; M. Gallei ; C. Ruttiger ; Siegfried Eigler (Institutionen för kemi och kemiteknik, Organisk kemi) ; C. E. Halbig
Advanced Energy Materials (1614-6832). Vol. 6 (2016), 12,
[Artikel, refereegranskad vetenskaplig]

The preparation and performance of a new cathodic battery material consisting of a composite of poly(vinylferrocene) (PVFc) and reduced graphene oxide (rGO) is described. It shows the highest charge/discharge efficiency (at a rate of 100 A g(-1)) ever reported for ferrocene-polymer materials. The composite allows for specific capacities up to 0.21 mAh cm(-2) (770 mC cm(-2), 29 mu m film thickness) at a specific capacity density of 114 mAh g(-1) and less than 5% performance decay over 300 cycles. The composite material is binder free and the charge storing PVFc accounts for 88% of the total weight of the cathodic material. The superb performance is based on (i) perfect self-assembling of oxidized PVFc on graphene oxide (GO) leading to PVFc@GO, (ii) its stepwise (n steps) transfer onto a current collector (CC) (PVFc@GO)(n) @CC (n = drop casting steps), and (iii) the efficient electrochemical transformation of GO into rGO in the composite using viologen as homogeneous electrocatalyst. The self-assembling step is analyzed by zeta potential and atomic force microscopy (AFM) studies, demonstrating heavy ferrocene loading on GO and a mesoporous composite structure, respectively. Complete GO/rGO transition and quantitative ClO4- on breathing of the composite are found by electrochemical quartz crystal microbalance and by electrochemical AFM.

Nyckelord: rechargeable lithium batteries, atomic-force microscopy, li-ion, batteries, graphite oxide, organic-solvents, electrical-conductivity, functionalized graphene, polymer nanocomposites, aqueous-electrolyte, raman-spectroscopy, Chemistry, Energy & Fuels, Materials Science, Physics

Article Number: 1600108

Denna post skapades 2016-08-22.
CPL Pubid: 240604


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Institutionen för kemi och kemiteknik, Organisk kemi


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Chalmers infrastruktur