Solid-State Single-Ion Polymer Electrolytes for Lithium-Ion Batteries

To design high-performance solid-state organic Li-ion conductors, it is essential to shift the paradigm of design from segmental motion mechanisms to new ion transport mechanisms. In this work, we designed a solid-state polymer composite Li-ion conductor that enables the transport of lithium ion but immobilizes anion in lithium salts. This new solid polymeric composite has achieved high ionic conductivity at room temperature and high Li-ion transference number simultaneously. A full-cell battery has been constructed with the use of this new solid polymer electrolyte, which showed high energy density and good cyclic stability. This work has an implication in the design of solid polymer electrolytes for solid-state lithium-ion batteries.