Matthew Keyser
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View article: Addressing Inherent Challenges to Chemical Relithiation of Cycled End‐of‐Life Cathode Materials
Addressing Inherent Challenges to Chemical Relithiation of Cycled End‐of‐Life Cathode Materials Open
Recycling end‐of‐life (EOL) lithium‐ion batteries (LIBs) is important to retain valuable resources from critical materials present in EOL battery waste. Direct recycling methods offer an opportunity to recover intact valuable cathode mater…
View article: Searching for a Pulse: Evaluating the Use of Rapid DC Pulses for Diagnosing Battery Health, State-of-Charge, and Safety
Searching for a Pulse: Evaluating the Use of Rapid DC Pulses for Diagnosing Battery Health, State-of-Charge, and Safety Open
Rapid electrochemical diagnostics, like DC pulse sequences or electrochemical impedance spectroscopy, are known to be useful for capacity prediction. However, it is unclear how previous results will map to different cell types and use case…
View article: Achieving Passive Thermal Runaway Propagation Resistance in Li-ion Battery Packs
Achieving Passive Thermal Runaway Propagation Resistance in Li-ion Battery Packs Open
Because of their high specific and volumetric energy density, lithium-ion cells are popular in energy storage systems with strict mass and volume restrictions. Such applications include electric vehicles, power tools, consumer electronics,…
View article: Li-Ion Battery Thermal Characterization for Thermal Management Design
Li-Ion Battery Thermal Characterization for Thermal Management Design Open
Battery design efforts often prioritize enhancing the energy density of the active materials and their utilization. However, optimizing thermal management systems at both the cell and pack levels is also key to achieving mission-relevant b…
View article: The battery failure databank: Insights from an open-access database of thermal runaway behaviors of Li-ion cells and a resource for benchmarking risks
The battery failure databank: Insights from an open-access database of thermal runaway behaviors of Li-ion cells and a resource for benchmarking risks Open
The thermal response of Li-ion cells can greatly vary for identical cell designs tested under identical conditions, the distribution of which is costly to fully characterize experimentally. The open-source Battery Failure Databank presente…
View article: Optimized purification methods for metallic contaminant removal from directly recycled Li-ion battery cathodes
Optimized purification methods for metallic contaminant removal from directly recycled Li-ion battery cathodes Open
Metallic contaminants pose a significant challenge to the viability of directly recycling Li-ion batteries. To date, few strategies exist to selectively remove metallic impurities from mixtures of shredded end-of-life material (black mass;…
View article: Methods and devices for electrochemical system analysis
Methods and devices for electrochemical system analysis Open
The present disclosure provides a calorimeter device and an electrochemical system analysis method. The device includes a first thermo-electric gauge (TEG) and a first conductor thermally coupled to the first TEG, the first conductor compr…
View article: Passive safety device and internal short tested method for energy storage cells and systems
Passive safety device and internal short tested method for energy storage cells and systems Open
A passive safety device for an energy storage cell for positioning between two electrically conductive layers of the energy storage cell. The safety device also comprising a separator and a non-conductive layer. A first electrically conduc…
View article: Calorimeters for testing energy storage systems and power electronics methods of making the same and methods of use
Calorimeters for testing energy storage systems and power electronics methods of making the same and methods of use Open
Large volume calorimeters (100) and small volume, or cell, calorimeters (700), as well as methods of making and using the same, are provided.
View article: Method for charging a hydrogen getter
Method for charging a hydrogen getter Open
A method for charging a sample of either a permanent or reversible getter material with a high concentration of hydrogen while maintaining a base pressure below 10.sup.-4 torr at room temperature involves placing the sample of hydrogen get…
View article: Batteries (2021 Annual Progress Report)
Batteries (2021 Annual Progress Report) Open
This document summarizes the progress of VTO battery R&D projects supported during the fiscal year 2021 (FY 2021). In FY 2021, the DOE VTO battery R&D funding was approximately $115 million. Its R&D focus was on the development of high-ene…
View article: Thermal Runaway of Li-Ion Cells: How Internal Dynamics, Mass Ejection, and Heat Vary with Cell Geometry and Abuse Type
Thermal Runaway of Li-Ion Cells: How Internal Dynamics, Mass Ejection, and Heat Vary with Cell Geometry and Abuse Type Open
Thermal runaway of lithium-ion batteries can involve various types of failure mechanisms each with their own unique characteristics. Using fractional thermal runaway calorimetry and high-speed radiography, the response of three different g…
View article: Heat Generation Concerns Associated with Extreme Fast Charging
Heat Generation Concerns Associated with Extreme Fast Charging Open
Present-day thermal management systems for battery electric vehicles are inadequate in limiting the maximum temperature rise of the battery during extreme fast charging. Incorrect thermal management designs for extreme fast charging condit…
View article: ReCell Center for Advanced Battery Recycling: Crosscutting Efforts
ReCell Center for Advanced Battery Recycling: Crosscutting Efforts Open
This poster summarizes work performed under crosscutting efforts during FY19 under the DOE’s Battery ReCell Center for the Annual Merit Review conducted by the Vehicle Technologies Office.
View article: NREL/NASA Internal Short-Circuit Instigator in Lithium Ion Cells
NREL/NASA Internal Short-Circuit Instigator in Lithium Ion Cells Open
NREL has developed a device to test one of the most challenging failure mechanisms of lithium-ion (Li-ion) batteries -- a battery internal short circuit. Many members of the technical community believe that this type of failure is caused b…
View article: The rise of electric vehicles—2020 status and future expectations
The rise of electric vehicles—2020 status and future expectations Open
Electric vehicles (EVs) are experiencing a rise in popularity over the past few years as the technology has matured and costs have declined, and support for clean transportation has promoted awareness, increased charging opportunities, and…
View article: Global Overview of Energy Storage Performance Test Protocols
Global Overview of Energy Storage Performance Test Protocols Open
As part of the World Bank Energy Storage Partnership, this document seeks to provide support and knowledge to a set of stakeholders across the developing world as we all seek to analyze the emerging opportunities and technologies for energ…
View article: Batteries Annual Progress Report (FY2019)
Batteries Annual Progress Report (FY2019) Open
The Vehicle Technologies Office (VTO) of the Department of Energy (DOE) conducts research and development (R&D) on advanced transportation technologies that would reduce the nation’s use of imported oil and would also lead to reductions in…