E-mail: cheyangs@nus.edu.sg

EDUCATION

Ph. D Department of Physics & Materials Science, City University of Hong Kong, Hong Kong, 2013

R. A. Energy Storage & Power Battery Technology Team, Ningbo Institute of Material and Engineering, CAS, Ningbo, 2010

M. S. Department of Chemistry, University of Science and Technology of China, 2008

B. S. Department of Chemistry, Huainan Normal University, Huainan, 2005
 

RESEARCH INTEREST

In aqueous Li-O₂ systems, the acid HX/base and water are involved as “catholytes” in the respective cell reactions:

4 Li + O₂ + 4 HX « 4 LiX + 2 H₂O (acidic solutions)

4 Li + O₂ + 6 H₂O « 4 LiOH·H₂O (basic solution)

These reactions lead to a higher, pH-dependent cell voltage U_rev= (4.27-0.059×pH) V. Even though aqueous Li-O₂ batteries have lower charging-discharging kinetic limitation than non-aqueous Li-O₂ batteries due to the soluble discharge products compared to solid Li₂O₂, catalysts for oxygen reduction reaction (ORR) and oxygen evolution reaction (OER) are still needed. Almost all the ORR and OER catalysts in non-aqueous system can be used in basic solution, however, acid-proof catalysts, especially for OER, are extremely deficient except precious metal catalysts. My interests are to explore some acid-proof, non-precious metal catalysts for OER or bi-functional catalysts for ORR and OER in acid condition.