Photo of Andrew Colclasure.

Andrew Colclasure

Researcher V-Mechanical Engineering

Orcid ID

Andrew Colclasure leads materials development and modeling research within NREL’s electrochemical energy storage group. Andrew’s research focuses on improving the cost, performance, and lifetime of lithium-ion batteries for electric vehicles. His work includes advances in electrochemical modeling and experimentation for fast charging, next-generation silicon anodes, battery recycling, solid-state electrolytes, eliminating the use of critical materials, and physics-based machine learning. Andrew is developing novel, safe, long-life batteries for stationary energy storage to enable greater penetration of renewable energy sources. Before joining NREL, Andrew was a staff scientist at ITN Energy Systems, working to rapidly commercialize solid-state lithium batteries, lithium-air batteries, and vanadium redox flow batteries.

Research Interests

Fast charging of li-ion batteries

Solid-electrolyte interphase

Redox-flow batteries


Ph.D., Mechanical Engineering, Colorado School of Mines

M.S., Mechanical Engineering, Colorado School of Mines

B.S., Mechanical Engineering, Colorado School of Mines

Professional Experience

Researcher, NREL (2017–present)

Staff Scientist, ITN Energy Systems (2011–2017)

Featured Work

Pathways Toward High-Energy Li-Sulfur Batteries, Identified Via Multi-Reaction Chemical Modeling, Journal of The Electrochemical Society (2022)

Long-Term Cyclability of Li4Ti5O12/LiMn2O4 Cells Using Carbonate-Based Electrolytes for Behind-the-Meter Storage Applications, Energy Storage Materials (2021)

Calendar Aging of Silicon-Containing Batteries, Nature Energy (2021)

Quantification of Inactive Lithium and Solid-Electrolyte Interphase Species on Graphite Electrodes After Fast Charging, ACS Publications (2020)

Electrode Scale and Electrolyte Transport Effects on Extreme Fast Charging of Lithium-Ion Cells, Electrochimica Acta (2020)

Degradation Mechanisms of High Capacity 18650 Cells Containing Si-Graphite Anode and Nickel-Rich NMC Cathode, Electrochimica Acta (2019)

Requirements for Enabling Extreme Fast Charging of High Energy Density Li-Ion Cells while Avoiding Lithium Plating, Journal of The Electrochemical Society (2019)

Resolving the Discrepancy in Tortuosity Factor Estimation for Li-Ion Battery Electrodes Through Micro-Macro Modeling and Experiment, Journal of The Electrochemical Society (2018)

Modeling Detailed Chemistry and Transport for Solid-Electrolyte-Interface (SEI) Films in Li-Ion Batteries, Electrochimica Acta (2011)

Thermodynamically Consistent Modeling of Elementary Electrochemistry in Lithium-Ion Batteries, Electrochimica Acta (2010)

View all NREL publications for Andrew Colclasure.


Rechargeable, Thin-Film, All Solid-State Metal-Air Battery, U.S. Patent No. 8,980,485 (2015)

Metal-Air Battery with Dual Electrode Anode, U.S. Patent No. 9,293,796 (2016)

Bendable Scoring Lines in Thin-Film Solid State Batteries, U.S. Patent No. 9,472,814 B1 (2016)

Composite Cathode Solid State Battery, U.S. Patent No. 10,044,028 B1 (2018)

Long-Life Rechargeable Ion Batteries Having Ion Reservoirs, U.S. Patent No. 10,826,132 B2 (2020)