The performance of enzymatic biofuel cells is greatly hindered by the poor electron transfer between enzyme catalysts and electrode surfaces. Now, an efficient electrical connection is made by coupling conventional direct and mediated electron transfer mechanisms, leading to much improved power density and stability.
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Yin, H., Tang, Z. Electron highways. Nat Energy 3, 543–544 (2018). https://doi.org/10.1038/s41560-018-0183-3