Highly Ordered Hierarchical Anodes for Extreme Fast Charging Batteries (Final Report)

Technical Report · Tue Aug 31 04:00:00 EDT 2021

DOI:https://doi.org/10.2172/1820637· OSTI ID:1820637

Dasgupta, Neil ^[1]

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1. Univ. of Michigan, Ann Arbor, MI (United States); University of Michigan, Ann Arbor

The goal of this project is to enable extreme fast charging (XFC) of Li-ion batteries, which was accomplished through a combination of 1) rational design and manufacturing of hierarchically structured anode architectures; 2) blending graphite/hard carbon into a bulk hybrid anode; 3) engineering artificial solid-electrolyte interphase (SEI) coatings with reduced interphase impedance; 4) computational modeling of coupled transport, kinetic, and electrochemical phenomena; and 5) improved fundamental understanding of lithium plating through operando analysis. This work integrated structural, compositional, and surface modification of graphite anodes, multi-physics modeling of ion transport, electrochemical activity, and heat transfer, advanced strategies to detect Li plating, and semi-automated roll-to-roll cell assembly. The unique facilities at the University of Michigan (UM) and Sandia National Laboratories (SNL) were leveraged to manufacture, prototype, and characterize commercially relevant >2Ah and >180 Wh/kg cells with a target of <20% capacity fade over 500 XFC cycles.

• Research Organization: University of Michigan, Ann Arbor, MI (United States)
• Sponsoring Organization: USDOE Office of Energy Efficiency and Renewable Energy (EERE), Transportation Office. Vehicle Technologies Office
• DOE Contract Number: EE0008362
• OSTI ID: 1820637
• Report Number(s): DOE-Michigan-EE0008362
• Country of Publication: United States
• Language: English

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