A membrane-less ethanol/air biofuel cell (BIC) with both the anode and cathode driven by visible light has been assembled. Simply upon a light source illumination, the BFC generates the maximum power density of 0.27 mW cm(-2) with an open circuit voltage of 1.13 V, realizing the dual route energy conversion of light energy and chemical energy to electricity, improving the energy utilization efficiency. (C) 2014 Elsevier Ltd. All rights reserved
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