Jiseon Hwang

Graduate Researcher (PhD candidate) - The Ohio State University - Columbus, Ohio, USA

(2020-01 - 2026-12)

Funded by Honda and the U.S. Department of Energy (ARPA-E)

Investigate the role of each elemental component in amorphous silicon-based anodes by systematically deconvoluting multi-component systems and correlating compositional variation with electrochemical behavior and structural evolution.
Develop rapid and scalable chemical prelithiation strategies for silicon-based anodes using Li-arene complexes, focusing on controllable lithium delivery, mitigation of first-cycle lithium loss, stabilization of SEI formation, and manufacturing-compatible process integration.
Investigate the sodium-ion compatibility of silicon composite anodes, identifying the electrochemical behavior and structural evolution induced by the larger Na+ ion, and implement presodiation to improve the initial Coulombic efficiency.
Utilize advanced analytical techniques (SEM/EDX, XRD, Raman, ssNMR) to correlate atomic-scale structure with electrochemical performance in practical coin half-cells and full cells.

Internship - Korea Institute of Energy Research (KIER)

(2019-01 - 2019-12)

Funded by the Korean government

Optimize slurries for 3D-printed micro-supercapacitors, improving viscosity control and particle dispersion to achieve high areal capacitance and precise multi-layer printed electrodes.
Investigate the redox behavior of tetraalkylmmonium polybromide species to deepen charge-storage mechanism understanding for hybrid capacitor applications.

Graduate Researcher (MS candidate) - Hangyang University, Sungshing Women's University - Seoul, Korea

(2017-03 - 2019-02)

Funded by Lotte Chemicals.

Investigate oxidation and indirect reduction mechanisms of quaternary ammonium polybromide (QBr2n+1) droplets on Pt ultramicroelectrodes, performing comprehensive electrochemical analysis and 3D COMSOL simulations to correlate interfacial mass transport with catalytic current amplification.
Probe bromine speciation and phase transitions among QBr2n+1 and tetraalkylammonium polybromide species via voltametric titration and transient electrochemical monitoring, uncovering liquid-to-solid transformations that govern redox behavior.
Execute all experimental measurements and simulation workflows independently, including electrochemical testing, Raman characterization, and finite-element modeling to validate reaction mechanisms.

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