Group Members

Principal Investigator

hector_abruna

Dr. Héctor D. Abruña
E-mail |
Office | PSB 293

Senior Scientists

Dr. Hongsen Wang
E-mail | hw99@cornell.edu
Office | PSB 216
 
Hongsen focuses on developing differential electrochemical mass spectrometry (DEMS) techniques and in-situ electrochemical FTIR spectroscopy to characterize and evaluate fuel cell and lithium ion battery electrode materials and electrolytes, exploring new electrode materials and improving the efficiency and stability of fuel cells and lithium ion batteries. He is also interested in mechanistic studies of small molecule oxidation and oxygen reduction reactions on Pt based catalysts, which are fuel cell related electrode reactions. Currently he mainly focus on profoundly understanding of CO electrocatalytic oxidation mechanism on Pt binary catalysts in acidic and basic media using in-situ techniques such as DEMS and FTIR , as well as DFT calculation and kinetic Monte Carlo simulations. In his spare time, he enjoys playing with his kids.

Post Docs

seung-ho_yu

Dr. Seung-Ho Yu
E-mail | sy578@cornell.edu
Office | PSB 202
 
Seung-Ho’s research focuses on mechanistic studies of rechargeable battery electrodes using in situ electron microscopy and X-ray techniques. He is also interested in designing and developing new electrode materials with high power and high capacity at the nanoscale level to be applied to electrochemical devices. In his free time, he enjoys playing soccer and listening to music.

Dr. Mahdi Ahmadi
E-mail | ma2259@cornell.edu
Office | PSB 284
 
Mahdi’s research interest focuses on synthesis and characterization of nanocatalysts, and exploring their evolution under reaction condition using operando spectroscopy and microscopy. In his spare time, Mahdi enjoys swimming, biking and running.

Dr. Matej Velicky
Marie Skłodowska-Curie Research Fellow
E-mail | mv337@cornell.edu
Office | PSB 284
 
Matej is working on understanding the fundamental electrochemistry of two-dimensional materials, such as graphene, MoS2, and hBN, using advanced nanofabrication and characterization techniques. His project connects Cornell with the University of Manchester and National Physical Laboratory (UK), and J.Heyrovsky Institute of Physical Chemistry (Czech Republic). His other interests include astronomy, music, and running.

Graduate Students

Johary Rivera-Meléndez
E-mail | jr858@cornell.edu
Office | PSB 218
 
Johary focuses on the characterization of anion-exchange membranes for application in alkaline fuel cells. She enjoys to cook and bake in her spare time.

Dong Ren
E-mail | dr469@cornell.edu
Office | PSB 296
 
Dong’s research mainly focuses on the preparation and characterization of energy storage materials with high specific energy and high power capability for lithium ion batteries. And he is also interested in using advanced electron microscopy techniques for electrochemical energy application. In his free time, Dong likes cooking and playing basketball.

Luxi Shen
E-mail | ls735@cornell.edu
Office | PSB 218
 
Luxi’s research focuses on developing organic/polymeric materials for energy storage applications. In particular, Luxi focuses on synthesizing organic cathode materials via electrochemical means, and then electrochemically characterizing these materials. In her spare time, Luxi enjoys a good long run, good music, and good food.

Yin Xiong
E-mail | yx327@cornell.edu
Office | PSB 296
 
Yin’s research mainly focuses on the synthesis and modification of nanoparticles with different structures, and explores their electrochemical catalytic ability and also the potential application in fuel cell. In the free time, she enjoys cooking and good food.

Na Zhang
E-mail | nz92@cornell.edu
Office | PSB 202
 
Na focuses on developing cathode materials for lithium/sulfur batteries. In particular, Na is interested in preparation and characterization of different sulfur/carbon or lithium sulfide/carbon compounds as cathodes for Li/S batteries.

Xinran Feng
E-mail | xf59@cornell.edu
Office | PSB 296
 
Xinran’s research focuses on using high-energy synchrotron X-ray techniques to study metal oxide electrode materials in Li ion batteries. She applies operando method to analyze the mechanism of these materials while cycling the batteries. In her free time, Xinran loves traveling, cooking and binge watching Netflix.

Jeesoo Seok
E-mail | js3272@cornell.edu
Office | PSB 202
 
Jeesoo’s research interest focuses on sodium-ion batteries and organic redox flow batteries. She synthesizes metal oxides/sulfides via solid-state reaction and applies them into sodium-ion batteries.  Also, Jeesoo studies organic materials based on electrochemical analysis for redox flow batteries. Outside of the lab, she likes cooking and baking.

Yao Yang
E-mail | yy639@cornell.edu
Office | PSB 202
 
Yao’s main focus is on the electrocatalysis of oxygen reduction reaction and hydrogen oxidation reaction (ORR/HOR) in alkaline fuel cells. Yao collaborates with Prof. David Muller’s group (Applied and Engineering Physics) and uses in-situ electrochemical scanning transmission microscopy and electron energy loss spectroscopy (STEM/EELS) to probe the structure-activity relationship of electrocatalysts. In his spare time, he loves learning about different cultures and enjoys playing pingpong and badminton.

Xinyao Lu
E-mail | xl626@cornell.edu
Office | PSB 218
 
Xinyao’s research interest focuses on developing materials for the electrocatalysis in fuel cells. She enjoys dancing and playing the piano in her leisure time.

Undergraduate Students

Rebecca Kubena
E-mail | rmk265@cornell.edu
Office | PSB 218
 
Rebecca has worked on synthesizing and characterizing inorganic materials made to increase the charge storage capabilities of capacitors. She now focuses on developing organic/polymeric materials for energy storage applications alongside Luxi. When not working in the lab, Rebecca participates on the Cornell softball team and loves to cook and watch Netflix.

Visiting Researchers

Dr. Takeshi Hagiwara
E-mail | th579@cornell.edu
Office | PSB 296
 
Takeshi’s research interest is to explore the relationship between crystal structure and physical properties, and he is studying the correlation between the activation energy of the ionic conductor and small structural disorders in crystal lattice.  On holiday, he enjoys playing with his children.

Dr. Esteban García-Tamayo
Fulbright Visiting Scholar Fellow
E-mail | eg593@cornell.edu
Office | PSB 286, HEB 151/212
 
Esteban’s research interest focuses on synthesis and characterization of cathode (high voltage LNMO and highly stable LFP/C) and anode materials (conversion reaction TMOs and highly stable LTO) for Li-ion batteries, employing techniques such as electrospray and electrospinning. Recently, he is exploring the application of these materials into fiber batteries. His project connects Prof. Hinestroza’s Textile Nanotechnology Lab and Prof. Abruña’s Electrochemistry Lab at Cornell University with the New Materials Lab and Energy&Thermodynamics Lab at Universidad Pontificia Bolivariana (Colombia). In his spare time, Esteban enjoys brewing beer, playing soccer and board games.

Dr. Peng Zhang
E-mail | pz54@cornell.edu
Office | PSB 286
 
Peng’s research mainly focuses on the preparation and characterization of functional polymer electrolyte and separators for lithium ion batteries such as high safety ceramic coated polyolefin separators. He is also interested in functional electrolytes of other high energy density batteries. In his spare time, he enjoys cooking and reading.