We employ analytical and physical chemistry strategies to make renewable energy applications better


Electrochemically active bacteria which converts chemical bonds to electricity (or converts electricity to chemical bonds) hold promise for the next generation fuel cell. We study charge transfer mechanism between bacteria and electrode.


90% of global energy is produced by combustion engine which operates at 30~40%. It means ~60% of energy is just lost to environment as waste heat. Solid-state thermoelectric device converts the waste heat to electricity and nanoscale materials can show extremely high efficiency. Our group is dedicated to discover the design rule of next generation thermoelectric materials.

Nano Letters, 16, 4133 (2016)   ACS Nano, 10, 124 (2015)  Nano Letters, 15, 3273 (2015)  Nano Letters, 14, 5471 (2014)

Online Electrochemical Mass Spectrometry

OEMS is a technique to study volatile species that are formed while operating a cell. The exact mechanisms of side reactions and gas evolution within the battery cycle is poorly understood. OEMS could give us hints on which voltage each reaction occurs and how rigorous the reaction is by giving the signal of each gas species while operating the cell. This technique could also be utilized in OER and HER catalysts to identify the extent of the efficiency of the state-of-the-art catalysts

DEMS setup.png