Nanocrystaline Beta-Ni(OH)2 Cathodes and Their Nanoelectrofuel Analogs for Flow Batteries
Our work focuses on the development of a suspension form of Ni(OH)2electrodes, also called nanoelectrofuels (NEFs). NEFs are stable dispersions of nano-scale battery active materials in the electrolytes that can be used in flow batteries as high energy density liquid energy storage. The main advantage of NEFs compared to traditional flow battery electrolytes is that high concentrations of active materials, and therefore energy density as concentration of nanoparticles in suspensions it is not limited by solubility of redox salts.
The presentation will discuss how different morphologies and crystallinities of β-Ni(OH)2 nanoparticles can be achieved through a simple one-step synthesis method; analysis with scanning electron microscopy (SEM), XRD, and thermogravimetric analysis (TGA) techniques; electrochemical characterization, including cyclic voltammetry, charge/discharge curves and life cycle analysis for different synthesis products in NEF formulations and compare their performance to the solid state analogs. In addition, we will present results from our in situ XAFS study of structural and electronic changes taking place during charge and discharge cycles in β-Ni(OH)2 cathodes.
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