Journal
CHEMICAL REVIEWS
Volume 119, Issue 16, Pages 9509-9558Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.chemrev.9b00115
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Funding
- National Natural Science Foundation of China [81673172, 21475144, 21275152, 91227116, 21706273, 21878324]
- Major Program of Shandong Province Natural Science Foundation [ZR2018ZC0125]
- National Key Research and Development Program of China [2018YFA0901300]
- CAS Pioneer Hundred Talent Program (Type C) [2016-081]
- Platform Chimie NanoBio ICMG [FR 2607]
- ANR [ENZYMOR-ANR-16-CE05-0024]
- Government of Ireland [GOIPG/2014/659]
- H. C. Orsted COFUND fellowship
- Irish Research Council (IRC) [GOIPG/2014/659] Funding Source: Irish Research Council (IRC)
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The ever-increasing demands for clean and sustainable energy sources combined with rapid advances in biointegrated portable or implantable electronic devices have stimulated intensive research activities in enzymatic (bio)fuel cells (EFCs). The use of renewable biocatalysts, the utilization of abundant green, safe, and high energy density fuels, together with the capability of working at modest and biocompatible conditions make EFCs promising as next generation alternative power sources. However, the main challenges (low energy density, relatively low power density, poor operational stability, and limited voltage output) hinder future applications of EFCs. This review aims at exploring the underlying mechanism of EFCs and providing possible practical strategies, methodologies and insights to tackle these issues. First, this review summarizes approaches in achieving high energy densities in EFCs, particularly, employing enzyme cascades for the deep/complete oxidation of fuels. Second, strategies for increasing power densities in EFCs, including increasing enzyme activities, facilitating electron transfers, employing nanomaterials, and designing more efficient enzyme-electrode interfaces, are described. The potential of EFCs/(super)capacitor combination is discussed. Third, the review evaluates a range of strategies for improving the stability of EFCs, including the use of different enzyme immobilization approaches, tuning enzyme properties, designing protective matrixes, and using microbial surface displaying enzymes. Fourth, approaches for the improvement of the cell voltage of EFCs are highlighted. Finally, future developments and a prospective on EFCs are envisioned.
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