Ultralong‐Discharge‐Time Biobattery Based on Immobilized Enzymes in Bilayer Rolled‐Up Enzymatic Nanomembranes. Issue 13 (9th February 2018)

• Record Type: Journal Article
• Authors: Liu, Bo; Yan, Chenglin; Si, Wenping; Sun, Xiaolei; Lu, Xueyi; Ansorge‐Schumacher, Marion; Schmidt, Oliver G.
• Is Part Of: Small. Volume 14:Issue 13(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2018-02-09
• Subjects: bilayer rolled‐up enzymatic nanomembranes -- biobatteries -- glucose biofuel cells -- immobilized enzymes -- glucose dehydrogenase; Nanotechnology -- Periodicals; Nanoparticles -- Periodicals; Microtechnology -- Periodicals; 620.5
• DOI: 10.1002/smll.201704221
• Languages: English
• ISSNs: 1613-6810

Abstract

Abstract: 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. Abstract : An enzyme‐driven glucose biofuel cell that enables a combination of both high power density and ultralong discharge times is reported, which is based on bilayer rolled‐up enzymatic nanomembrane electrodes. The rolled‐up nanomembranes consist of titanium, which provides high conductivity and has excellent biocompatibility, and the active enzymes are physically immobilized by the rolling up of the layers.