From Extended Nanofluidics to an Autonomous Solar-Light-Driven Micro Fuel-Cell Device
Corresponding Author
Dr. Yuriy Pihosh
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorJin Uemura
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorDr. Ivan Turkevych
National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 2–13, Tsukuba, Ibaraki, 305-0047 Japan
Search for more papers by this authorDr. Kazuma Mawatari
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorDr. Yutaka Kazoe
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorDr. Adelina Smirnova
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorCorresponding Author
Prof. Takehiko Kitamori
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorCorresponding Author
Dr. Yuriy Pihosh
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorJin Uemura
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorDr. Ivan Turkevych
National Institute of Advanced Industrial Science and Technology (AIST), AIST Central 2–13, Tsukuba, Ibaraki, 305-0047 Japan
Search for more papers by this authorDr. Kazuma Mawatari
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorDr. Yutaka Kazoe
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorDr. Adelina Smirnova
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorCorresponding Author
Prof. Takehiko Kitamori
Department of Applied Chemistry, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo, 113-8656 Japan
Search for more papers by this authorAbstract
Autonomous micro/nano mechanical, chemical, and biomedical sensors require persistent power sources scaled to their size. Realization of autonomous micro-power sources is a challenging task, as it requires combination of wireless energy supply, conversion, storage, and delivery to the sensor. Herein, we realized a solar-light-driven power source that consists of a micro fuel cell (μFC) and a photocatalytic micro fuel generator (μFG) integrated on a single microfluidic chip. The μFG produces hydrogen by photocatalytic water splitting under solar light. The hydrogen fuel is then consumed by the μFC to generate electricity. Importantly, the by-product water returns back to the photocatalytic μFG via recirculation loop without losses. Both devices rely on novel phenomena in extended-nano-fluidic channels that ensure ultra-fast proton transport. As a proof of concept, we demonstrate that μFG/μFC source achieves remarkable energy density of ca. 17.2 mWh cm−2 at room temperature.
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