Design rules for liquid crystalline electrolytes for enabling dendrite-free lithium metal batteries

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  • Zeeshan Ahmad
    Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213;
  • Zijian Hong
    Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213;
  • Venkatasubramanian Viswanathan
    Department of Mechanical Engineering, Carnegie Mellon University, Pittsburgh, PA 15213;

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<jats:title>Significance</jats:title> <jats:p>Lithium metal anodes offer a promising approach to improve the energy density of batteries to enable electrification of transportation. Dendrite suppression plagues the safety and cycle life of lithium metal anodes. In this work, we perform a comprehensive analysis of the use of liquid crystalline electrolytes in lithium metal anodes. We report theoretical demonstration of spontaneous stabilization of metal-electrode position using a liquid crystalline electrolyte due to the energy that arises when the molecules of the liquid crystal reorient. Building on this, we develop a comprehensive set of molecular-level design rules that will pave the way toward the realization of this new class of electrolytes for practical lithium metal batteries.</jats:p>

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