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

被引:50
作者
Beladi-Mousavi, Seyyed Mohsen [1 ]
Sadaf, Shamaila [1 ]
Walder, Lorenz [1 ]
Gallei, Markus [2 ]
Ruettiger, Christian [2 ]
Eigler, Siegfried [3 ]
Halbig, Christian E. [4 ,5 ]
机构
[1] Univ Osnabruck, Ctr Phys & Chem New Mat, Inst Chem New Mat, Barbarastr 7, D-49069 Osnabruck, Germany
[2] Tech Univ Darmstadt, Ernst Berl Inst Tech & Makromol Chem, Alarich Weiss Str 4, D-64287 Darmstadt, Germany
[3] Chalmers Univ Technol, Chem & Chem Engn, SE-41296 Gothenburg, Sweden
[4] Univ Erlangen Nurnberg, Dept Chem & Pharm, Dr Mack Str 81, D-90762 Furth, Germany
[5] Univ Erlangen Nurnberg, Cent Inst New Mat & Proc Technol, Dr Mack Str 81, D-90762 Furth, Germany
关键词
GRAPHITE OXIDE; ELECTRICAL-CONDUCTIVITY; FUNCTIONALIZED GRAPHENE; AQUEOUS DISPERSIONS; RAMAN-SPECTROSCOPY; CARBON NANOTUBES; ORGANIC-SOLVENTS; ELECTROLYTE-TYPE; FERROCENE; REDUCTION;
D O I
10.1002/aenm.201600108
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
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.
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页数:13
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