Science, Space and Technology News 2024
A Columbia Engineering study reveals how nuclear magnetic resonance spectroscopy can enhance lithium metal battery design by providing detailed insights into anode surface structures. Credit: SciTechDaily.com
A team from Columbia Engineering details how nuclear magnetic resonance spectroscopy techniques can be leveraged to design the anode surface in lithium metal batteries in a new paper published today in the journal. This research offers fresh data and interpretations on how these methods provide a unique perspective on the structure of these surfaces, beneficial to the battery research community.
The chemistry of the passivation layer impacts how lithium ions move during battery charging/discharging, ultimately impacting whether or not metal filaments that lead to poor battery performance grow inside of the system. Up to now, measuring the chemical composition of the passivation layer, known by the battery community as the solid electrolyte interphase , while simultaneously capturing information on how lithium ions located in that layer are moving around has been next to impossible.
NMR enables researchers to directly probe how fast lithium ions move at the interface between the lithium metal anode and its passivation layer, while also providing a readout of the chemical compounds that are present on that surface. While other characterization methods, like electron microscopy, may provide striking images of the SEI layer on the surface of lithium metal, they cannot pinpoint the exact chemical composition of disordered, nor can they “see” ion transport.
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