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Ultralong‐Discharge‐Time Biobattery Based on Immobilized Enzymes in Bilayer Rolled‐Up Enzymatic Nanomembranes
Author(s) -
Liu Bo,
Yan Chenglin,
Si Wenping,
Sun Xiaolei,
Lu Xueyi,
AnsorgeSchumacher Marion,
Schmidt Oliver G.
Publication year - 2018
Publication title -
small
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.785
H-Index - 236
eISSN - 1613-6829
pISSN - 1613-6810
DOI - 10.1002/smll.201704221
Subject(s) - bilirubin oxidase , materials science , power density , glucose oxidase , nanotechnology , bilayer , immobilized enzyme , electronics , enzyme , power (physics) , biosensor , chemistry , membrane , biochemistry , quantum mechanics , physics
Glucose biofuel cells (GBFCs) are highly promising power sources for implantable biomedical and consumer electronics because they provide a high energy density and safety. However, it remains a great challenge to combine their high power density with reliable long‐term stability. In this study, a novel GBFC design based on the enzyme biocatalysts glucose dehydrogenase, diaphorase, and bilirubin oxidase immobilized in rolled‐up titanium nanomembranes is reported. The setup delivers a maximum areal power density of ≈3.7 mW cm −2 and a stable power output of ≈0.8 mW cm −2 . The power discharges over 452 h, which is considerably longer than reported previously. These results demonstrate that the GBFC design is in principle a feasible and effective approach to solve the long‐term discharge challenge for implantable biomedical device applications.