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Steven Limmer

Certified

Engineer

None

Technologies

My Portfolio Highlights

My New Track

Understanding Data Topics

My New Course

Introduction to Python

My New Track

Understanding Data Topics

Inquisitive Engineer with 20 years of experience providing data-driven insights to solve complex problems in electrochemistry and materials science.

My Work

Take a look at my latest work.

course

Understanding Data Science

course

Introduction to Python

course

Intermediate Python

course

Understanding Data Science

My Certifications

These are the industry credentials that I’ve earned.

Data Scientist

Data Scientist

DataCamp Course Completion

Take a look at all the courses I’ve completed on DataCamp.

Courses

Introduction to Python
Introduction to SQL
Understanding Data Science
Intermediate SQL

My Work Experience

Where I've interned and worked during my career.

Sepion Technologies | Sep 2021 - Aug 2024

Staff Engineer

• Led expansion of team electrochemical capabilities and experimental design • Designed and ran fast charge DOE (Design of Experiments) to improve lithium-metal battery fast charge performance ◦ Constructed and analyzed Design of Experiments for other scientists/engineers ◦ Wrote testing protocols for experimental cells ◦ Collaborated with Staff Data Scientist on predicting conditions to extend cycle life from historical data ◦ Designed experiments to optimize cycling, leading to a >50% increase in cycles • Conducted cathode failure analysis and led root cause investigation ◦ Conducted experiments to help identify the cathodes as primary source of cell failure ◦ Identified new materials and supported development of new cell designs to shift primary failure back to the anode • Data base build ◦ Developed new metrics and KPIs for incoming quality measurements on new electrode materials ◦ Created Python script to extract valuable KPIs from battery cycling data ◦ Performed creative data analysis/visualizations to drive business decisions ◦ Deployed web apps for interactive data analysis, reporting and process support • Led expansion of electrochemical capabilities, bringing EIS, MacMullen number, and H-cell measurements as routine screening tools for materials development • Designed experiments to optimize formation protocols, leading to ~7% increase in cycles • Mentored junior employees, new hires and student interns
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Energizer | Oct 2014 - Aug 2021

Staff Technology Engineer

Basic and applied research to support service and cost improvements for alkaline batteries -Oversee trials from bench to pilot to plant scale -Lead battery pilot trials to asses impact of new materials Help support plant operations Design of Experiments and data analysis

Sandia National Laboratories | Jul 2008 - Oct 2014

Senior Member of Technical Staff, Materials Science

Electrodeposition of metals and semiconductors. Electrochemical characterization of materials for batteries and ultracapacitors. Synthesis of anodic alumina templates for nanowire formation.

My Education

Take a look at my formal education

PhD, Materials ScienceUniversity of Washington | 2004
B.S, Materials Science and EngineeringUniversity of Utah | 1999
B.S, PhysicsUniversity of Utah | 1995

About Me

Seeking to expand my knowledge and support a strong team in learning from unrealized data insights

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