A Nernstian Biosupercapacitor.
We propose the very first "Nernstian biosupercapacitor", a biodevice based on only one redox polymer: poly(vinyl imidazole-co-allylamine)[Os(bpy)2Cl], and two biocatalysts. At the bioanode PQQ-dependent glucose dehydrogenase reduces the Os3+moieties at the polymer to Os2+shifting the Nernst potential of the Os3+/Os2+redox couple to negative values. Concomitantly, at the biocathode the reduction of O2by means of bilirubin oxidase embedded in the same redox polymer leads to the oxidation of Os2+to Os3+shifting the Nernst potential to higher values. Despite the use of just one redox polymer an open circuit voltage of more than 0.45 V was obtained during charging and the charge is stored in the redox polymer at both the bioanode and the biocathode. By connecting both electrodes via a predefined resistor a high power density is obtained for a short time exceeding the steady state power of a corresponding biofuel cell by a factor of 8.
Biomedical Science, Faculty of Health and Society, Malmö University, Södra Förstadsgatan 101, 20506, Malmö, Sweden.|Kurchatov's Complex of NBICS-technologies, National Research Center "Kurchatov Institute", Akademika Kurchatova Sq. 1, 123 182, Moscow, Russia.
Dmitry
D
Pankratov
Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstrasse 150, 44780, Bochum, Germany.
Felipe
F
Conzuelo
Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstrasse 150, 44780, Bochum, Germany.
Piyanut
P
Pinyou
Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstrasse 150, 44780, Bochum, Germany.
Sabine
S
Alsaoub
Analytical Chemistry-Center for Electrochemical Sciences (CES), Ruhr-Universität Bochum, Universitätsstrasse 150, 44780, Bochum, Germany.
Wolfgang
0000-0003-2916-5223
W
Schuhmann
Biomedical Science, Faculty of Health and Society, Malmö University, Södra Förstadsgatan 101, 20506, Malmö, Sweden.|Kurchatov's Complex of NBICS-technologies, National Research Center "Kurchatov Institute", Akademika Kurchatova Sq. 1, 123 182, Moscow, Russia.
Sergey
S
Shleev
D042843:Glucose 1-Dehydrogenase / Q000378:metabolism*; D009942:Organometallic Compounds / Q000737:chemistry / Q000378:metabolism*; D009992:Osmium / Q000737:chemistry / Q000378:metabolism*; D010084:Oxidation-Reduction; D010100:Oxygen / Q000737:chemistry / Q000378:metabolism
D009942:Organometallic Compounds; D009992:Osmium; D042843:Glucose 1-Dehydrogenase; D010100:Oxygen
Nernstian biosupercapacitor; bioelectrocatalysis; biofuel cells; redox hydrogels