title: A glucose bio-battery prototype based on a GDH/poly(methylene blue) bioanode and a graphite cathode with an iodide/tri-iodide redox couple.
abstract: A glucose bio-battery prototype independent of oxygen is proposed based on a glucose dehydrogenase (GDH) bioanode and a graphite cathode with an iodide/tri-iodide redox couple. At the bioanode, a NADH electrocatalyst, poly(methylene blue) (PMB), which can be easily grown on the electrode (screen-printed carbon paste electrode, SPCE) by electrodeposition, is harnessed and engineered. We find that carboxylated multi-walled carbon nanotubes (MWCNTs) are capable of significantly increasing the deposition amount of PMB and thus enhancing the PMB's electrocatalysis of NADH oxidation and the glucose bio-battery's performance. The choice of the iodide/tri-iodide redox couple eliminates the dependence of oxygen for this bio-battery, thus enabling the bio-battery with a constant current-output feature similar to that of the solar cells. The present glucose bio-battery prototype can attain a maximum power density of 2.4 μW/cm(2) at 25 °C.
authors.affiliation: Institute of Polymer Science and Engineering, National Taiwan University, Taipei 10617, Taiwan.
authors.forename: Jen-Yuan
authors.initials: JY
authors.lastname: Wang
authors.forename: Po-Chin
authors.initials: PC
authors.lastname: Nien
authors.forename: Chien-Hsiao
authors.initials: CH
authors.lastname: Chen
authors.forename: Lin-Chi
authors.initials: LC
authors.lastname: Chen
authors.forename: Kuo-Chuan
authors.initials: KC
authors.lastname: Ho
mesh_terms: D001674:Bioelectric Energy Sources; D056804:Biofuels / Q000032:analysis; D002138:Calibration; D002244:Carbon / Q000737:chemistry; D002384:Catalysis; D055664:Electrochemical Techniques; D004566:Electrodes; D005947:Glucose / Q000378:metabolism*; D042843:Glucose 1-Dehydrogenase / Q000378:metabolism*; D006108:Graphite / Q000378:metabolism*; D007454:Iodides / Q000378:metabolism*; D008751:Methylene Blue / Q000031:analogs & derivatives* / Q000378:metabolism*; D009243:NAD / Q000378:metabolism; D037742:Nanotubes, Carbon / Q000737:chemistry; D010084:Oxidation-Reduction; D011108:Polymers / Q000378:metabolism*
chemical_list: D056804:Biofuels; D007454:Iodides; D037742:Nanotubes, Carbon; D011108:Polymers; D009243:NAD; D002244:Carbon; D006108:Graphite; D042843:Glucose 1-Dehydrogenase; D005947:Glucose; D008751:Methylene Blue