Graduate Students

Diyi Cheng

email: d3cheng at

Diyi received his B.S. in Material Physics from Jilin University in China. His previous research focused on nickel–cobalt layered double hydroxide nanosheets for high-performance supercapacitor electrode materials. Currently he is working on lithium thin film battery and solid-state electrolyte.



Hyeseung ChungHyeseung Chung

email: hyc022 at

Haelie received her B.S. in Chemical Engineering from Cornell University. Her previous research focused on metal adhesion using electrospinning method. After her graduation, she worked for Samsung SDI. Her current research involves optimizing and understanding the polyol process to synthesis high-voltage cathode materials for Li-ion batteries.


Dan DavisDan Davies

email: danielmdavies at

Dan received his B.S. in Mechanical Engineering from Princeton University. Spent last year developing and trying to commercialize a novel battery cycler. His current research involves battery management systems for grid scale use through a combination of computational and experimental work

Macwin Savio D’Souza

email: msdsouza at
Macwin graduated with a Bachelors’ in Chemical Engineering from RVCE, Bangalore, India in 2016. After graduating he joined Reliance Industries Limited, India as a Process Engineer where he focused on the manufacturing of organic polymers such as polyvinyl chloride (PVC) for the petrochemical industry. He is currently pursuing a Masters’ in Materials Science and Engineering at UC San Diego. His research interest is in the field of electrochemical energy storage. Currently, he is involved in the development of high capacity silicon anode materials for the next generation Lithium-ion batteries.

ChengchengChengcheng Fang

email: chf008 at

Chengcheng received her B.S. in Materials Science and Engineering from Zhejiang University and M.Phil. from Hong Kong University of Science and Technology. Her previous work focused on Si-based nano composite anode materials for lithium ion batteries. Her current project in the LESC group is to develop advanced electrode materials for rechargeable batteries.

Oeystein Fjeldberg

ofjeldbe at

Oeystein received B.S. in Chemistry in 2017 from Wingate University in North Carolina (minors in math, physics, and communication). He is interested in using nanoengineering for materials design of emerging solar cell technologies such as hybrid organic/inorganic perovskites.

William Getz

email: wgetz at

Will graduated from the University of Southern California with a B.S. in Chemistry. He was previously involved in photochemistry research projects on inorganic phosphors and compounds associated with photosynthetic reactions. His current research entails development of rechargeable batteries with novel functionality utilizing zinc and metal-oxide electrodes.

Hayley Hirsh

email: hhirsh at

Hayley received her B.S. in Materials Science and Engineering from Cornell University. Her previous research included transition metal oxide catalysts for hydrogen fuel cells. Her current research interests include the synthesis and characterization of cathode materials for sodium ion batteries.

 Rajan Kumar


Rajan Kumar is a PhD student in the Nanoengineering Department at University of California San Diego (UCSD). His research is focused on implementing advanced materials and printing technology to develop wearable, energy harvesting technologies. He received his B.S. in
Nanoscale Science from SUNY Poly College of Nanoscale Science and Engineering (CNSE) with a background in nanoscale fabrication for molecular imprinting polymers and lab-on- chip biosensors.

 Jungwoo LeeJungwoo Lee

email:  jzlee at

Jungwoo graduated with a B.A. in physics from Wellesley College. Afterwards she worked as a research engineer for the Massachusetts Institute of Technology Photovoltaic Research Laboratory developing in situ imaging techniques for solar cell manufacturing and novel solar-to-fuel water splitting devices. She’s joining the LESC group using in situ characterization methods to elucidate structural and chemical changes in microbatteries over use.


Yixuan Li

email: yil889 at

Yixuan received her B.S. in New Energy Science and Engineering from Nanjing University in China. Her previous research focused on developing cathode materials for Li-ion batteries and Li-air batteries. Her current research involves synthesis and characterization of advanced electrode materials for Li-ion batteries.

Nguyen_webHan Nguyen

email: hannguyen858 at

Han graduated with a B.S. in Nano Engineering from UCSD. His research investigates the synthesis, processing, and characterization of sodium based solid-state electrolyte.



Pritesh ParikhPritesh Parikh

email: priteshparikh at

Pritesh Parikh graduated from BITS-Pilani Hyderabad Campus with a Bachelor’s degree in Electronics and Communications Engineering and a Master’s Degree in Physics. His previous work at Tata Institute of Fundamental Research focused on nanoelectromechanical systems using vanadium dioxide nanowires. Pritesh is interested in using nanostructures for renewable energy generation. His current research involves understanding the charge transport and recombination mechanisms in perovskite based solar cells.

Darren Tan Huan Shen

email: dht020 at

Darren graduated from the National University of Singapore with a Bachelor in Chemical Engineering. He previously worked on developing transition metal based cathodes for lithium sulfur battery applications. His current research involves development of various solid state chemistries to improve performance in lithium and sodium sulfur cells.



Sophia Valenzuela

email: spvalenz at

Sophia received her B.S. in Chemical Engineering from Stanford University. Her previous research included spectroelectrochemistry of battery materials and electrocatalysts for hydrogen production. Her current research focuses on development and characterization of perovskite solar cells.



wang_s_webShen Wang

email: shenwang8713 at

Shen received his B.S. in Chemistry from Peking University and M.S. in Condensed Matter Physics from the Chinese Academy of Sciences. His previous researches in the Chinese Academy of Sciences focused on liquid and quasi-solid state electrolytes for dye-sensitized solar cells and quantum dot-sensitized solar cells. His current research is based on the charge transfer and recombination mechanisms in perovskite solar cells.

Wilton Woo

email:wiltonwoo3 at
Wilton received his B.S. in Chemical Engineering from UCSD and currently pursuing his M.S. in Chemical Engineering. He is working on synthesis and characterization of sodium based solid-state electrolytes. He is also working on interface studies of sodium based cathodes and sodium solid-state electrolytes.



ErikErik Wu

email: eaw003 at

Erik graduated with a B.S. in Materials Science and Engineering from UC Berkeley. He is interested in energy technologies and has worked in industry doing process development and optimization of solar cells before coming to UC San Diego. His current research involves the synthesis, processing, characterization, and evaluation of sodium and lithium-based solid-state electrolyte materials.

TomThomas Wynn

email: thomasawynn at

Tom graduated from The Ohio State University with a B.S. in Materials Science & Engineering. He worked at Los Alamos National Laboratory, using advanced microscopy techniques to characterize metallic and nuclear fuel interfaces. He then earned an M.S. from UC Davis, studying magnetic anisotropy in complex oxide thin films by soft x-ray spectroscopy. He is currently applying his background in advanced characterization and film growth to understand changes in interfacial structure and composition that limit solid-state battery performance.

Yangyuchen Yang

email: yay081 at

Yang received his B.S. in Material Science&Engineering from Peking University in China. His previous work was focused on the synthesis, assessment of Metal-Organic Framework (MOF) and applications of MOF-derived nano-porous particles on energy storage fields. He currently working on the development of liquefied gas electrolyte and enable Li metal anode by comprehensive approaches.





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Fax: (858) 534-9553 



Structural and Materials Engineering

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Office: SME 242G

Lab: SME 310 and 312

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