Optimization of Precursor Synthesis for Future Fabrication of Sodium-Ion Positive Electrode Materials
Faculty Mentor Information
Dr. Claire Xiong (Mentor), Boise State University
Presentation Date
7-2024
Abstract
The proliferation of electric vehicles and renewable energy has caused an increase in demand for small-scale and large-scale energy storage systems. This rapid rise has placed a great strain on the expensive and limited resources found within contemporary lithium-ion battery technologies (e.g. Li, Ni, Co). Thus, sodium-ion batteries have been proposed as a “beyond Li-ion” technology, due to sodium’s low cost and abundance. Specifically, Fe- and Mn-based systems show promise as both are high in abundance, electrochemically active, and nontoxic. Currently, the coprecipitation reaction of transition metal ions with a hydroxide source is the industry standard for making positive electrode precursor material for lithium-ion batteries. However, there is great difficulty implementing current technology in the production of Fe/Mn based hydroxides. In particular, the standard chelating agent (ammonia) cannot form a stable ammine with iron, disrupting the elemental and morphological homogeneity of the material. To ensure the commercialization of future sodium-ion Fe/Mn based positive electrode materials, an alternative chelating agent must be found. In this work, the role of the chelating agent (or the lack-thereof) on the resulting morphology and electrochemical performance will be examined. We have found an alternative chelating agent that results in morphological uniformity and exemplary electrochemical performance.
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Optimization of Precursor Synthesis for Future Fabrication of Sodium-Ion Positive Electrode Materials
The proliferation of electric vehicles and renewable energy has caused an increase in demand for small-scale and large-scale energy storage systems. This rapid rise has placed a great strain on the expensive and limited resources found within contemporary lithium-ion battery technologies (e.g. Li, Ni, Co). Thus, sodium-ion batteries have been proposed as a “beyond Li-ion” technology, due to sodium’s low cost and abundance. Specifically, Fe- and Mn-based systems show promise as both are high in abundance, electrochemically active, and nontoxic. Currently, the coprecipitation reaction of transition metal ions with a hydroxide source is the industry standard for making positive electrode precursor material for lithium-ion batteries. However, there is great difficulty implementing current technology in the production of Fe/Mn based hydroxides. In particular, the standard chelating agent (ammonia) cannot form a stable ammine with iron, disrupting the elemental and morphological homogeneity of the material. To ensure the commercialization of future sodium-ion Fe/Mn based positive electrode materials, an alternative chelating agent must be found. In this work, the role of the chelating agent (or the lack-thereof) on the resulting morphology and electrochemical performance will be examined. We have found an alternative chelating agent that results in morphological uniformity and exemplary electrochemical performance.