Jangsoo Lee

• Executed Tesla qualification process for existing PCAM and CAM suppliers, including NCM and LFP materials.
• Established qualification and scaling process flows for Tesla-contracted NCM and LFP cathode suppliers.
• Monitored production output at facilities to support expansion initiatives with current suppliers.
• Conducted overall quality control assessments, including GRR and process capability metrics (Cpk/Ppk).
• Developed in-process QC, OQC, and material quality controls to enhance required metrology.

LiFePO4 and LiMnxFe1-xPO4 development at production level in the U.S.

• Design and synthesis of FePO4 and FexMn1-xPO4 precursors, and their evaluations with domestic scale-up partners in the U.S.
• Commercial FePO4 precursor validation, screening work, and LFP/LMFP cathode preparation and testing.
• Experience in pilot and commercial production lines for mass production of LFP.

Development of electrode for CA (Chlor-Alkali) process and alkaline water electrolysis.

• Study on Direct growth of Ni, Co, Mn hydroxide onto the Metal substrate and its application on a large area (at least 1.2m (H) X 2.4m (W)) electrodes for OER electrode of CA and alkaline water electrolysis.
• Its commercial application is in the 10MW CA process in LG Chem.

Li-Mn-rich layered oxide cathode for high energy density Li-ion battery.

• Study chemical composition (Ni/Mn ratio, cobalt-free) of Li-Mn rich cathode materials and optimized cathode design with varying Ni/Mn ratio.
• Development of a pilot-scale synthetic process for Li-Mn-rich cathodes.
• Prepare electrode, coin, mono cell assembly, characterization, evaluation, and analysis.

Nickel-rich layered oxide cathode for high energy density Li-ion battery.

• Design and 35L laboratory and 350L pilot-scale synthesis of (Ni, Co, Mn)(OH)2 precursor in terms of co-precipitation method and its optimization.
• Synthesis of high Ni cathode materials in terms of the calcination process and its optimization.
• Study on a correlation between the precursor properties and calcined NCM cathode.
• Prepare electrode, coin, mono cell assembly, characterization, evaluation, and analysis.

Developed high-performance sulfur cathode for lithium-sulfur battery commercialization.

• Designed and synthesized sulfur-carbon composites including sulfurized carbon materials.
• Engineered electrocatalysts to ensure uniform lithium sulfide precipitation.
• Initiated in-situ growth of metal oxides on separator for enhanced performance.
• Optimized sulfur impregnation techniques to improve battery efficiency.
• Prepared electrode coin cell assemblies for comprehensive characterization and evaluation.
• Designed electrochemical in-situ cells for real-time lithium-sulfur battery analysis.

Synthesized and characterized spinel cathode materials for rechargeable zinc-ion batteries.

• Produced ZnMn2O4 and Ni-doped ZnMn2O4 as effective cathode materials.
• Conducted electrode evaluation and characterization to assess performance metrics.