Premium
Poly(vinylferrocene)–Reduced Graphene Oxide as a High Power/High Capacity Cathodic Battery Material
Author(s) -
BeladiMousavi Seyyed Mohsen,
Sadaf Shamaila,
Walder Lorenz,
Gallei Markus,
Rüttiger Christian,
Eigler Siegfried,
Halbig Christian E.
Publication year - 2016
Publication title -
advanced energy materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.08
H-Index - 220
eISSN - 1614-6840
pISSN - 1614-6832
DOI - 10.1002/aenm.201600108
Subject(s) - materials science , graphene , oxide , composite number , chemical engineering , electrochemistry , battery (electricity) , mesoporous material , nanotechnology , composite material , electrode , organic chemistry , metallurgy , chemistry , catalysis , power (physics) , physics , quantum mechanics , engineering
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 μm 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 ClO 4 − ion breathing of the composite are found by electrochemical quartz crystal microbalance and by electrochemical AFM.