Bernard Kim Email & Phone Number

Santa Cruz, California, Us

Cupertino, California, Us

Cupertino, California, Us

• Characterized Zn/Zn2+ redox kinetics/reversibility and quantified Zn2+ diffusivity and ionic conductivity in various concentrations of ionic liquid electrolytes via electrochemical analysis (CV, CA, EIS)• Identified capacity-degrading MnO2 phase changes in printed Zn-MnO2 cells under cycle life testing via differential capacity analysis (dQ/dV)• Reduced printed cathode surface roughness and waviness by 80% while maintaining electrical conductivity, rheology, and cycle life by optimizing particle size via ball milling using factorial DOE• Developed layer-by-layer additive printing process with PVDF-HFP gel polymer electrolyte to improve repeatability and cell performance (discharge capacity, cycle life, mechanical stability)• Characterized commercial lithium-ion cell degradation under constant current and pulsed current discharge for Internet of Things applications• Wrote custom Python libraries to automate data analysis and visualization for battery cycling, electrochemical analysis, rheology, electrode profilometry, and sheet resistance experiments• Characterized effect of processing environment (pressure, temperature, humidity) on gel polymer electrolyte morphology and ionic conductivity• Hired and mentored 12 undergraduate assistants and maintained safety standards for wet laboratory with 25+ researchers• Managed administrative and financial responsibilities to sustain facility and equipment transfer with uninterrupted lab operation

Cupertino, California, Us

• Led mechanical testing of batteries, including installation design validation, test buck IQC, sample statistics and correlation, and SOP documentation and training• Wrote script to calculate flexural modulus from vendor data and generate graphs for data visualization• Wrote and revised SOP documentation for mechanical and environmental testing of cells and packs• Designed test buck to simulate mechanical properties of system enclosure to support new product development• Created and updated cell CAD and drawings based on DFM and MCO feedback• Performed tolerance analyses on drawings to ensure Cpk and minimize DPPM• Designed packaging removal fixture to prevent cosmetic failures for use in final product assembly• Coordinated cross-functionally to standardize project status tracking tool

San Jose, California, Us

• Improved production ink recipe by adding system-compatible plasticizers to minimize performance losses• Developed new process for coating fuel cell component by investigating effects of additives on film adhesion• Qualified production inks for viscosity, particle size distribution, and density using commercial viscometer and particle size analyzer • Took inventory of and established organization system for 100+ current and legacy experimental fuel cell stacks

Berkeley, Ca, Us

• Designed and synthesized carbon-based porous electrode inks for printed supercapacitor and integrated with nickel-based printed current collector, culminating in fully functional and cycleable printed device• Designed dispenser- and flexographic-printable nickel-based current collector and zinc-based anode inks with respective resistivities of 0.0028Ω-cm and 40Ω-cm• Optimized printed slurry films for additive manufacturing methods, controlling processing parameters including composition, particle size, and curing environment• Familiarized visiting postdoc and new graduate students with lab equipment and practices• Mentored two undergraduate assistants in ink mixing, preparation, and printing

• Synthesized and prepared 70-80% porosity nanostructures of zirconium doped ceria (ZDC) and other ceramics via the sol-gel method for use in solid oxide fuel cells• Optimized procedural methods and reduced preparation time by 33%

Doctor Of Philosophy - Phd, Mechanical Engineering

Master’S Degree, Mechanical Engineering

Bachelor Of Science (B.S.), Materials Science & Engineering, Mechanical Engineering