Polymeric Electrolytes for Solid-state Lithium Ion Batteries: Structure Design, Electrochemical Properties and Cell Performances.

Abstract

The solid-state electrolytes are keys to achieve high energy, safety and stability for lithium ion batteries. In this review, core indicators of solid polymer electrolytes are discussed in detail including ionic conductivity, interface compatibility, mechanical integrity and cycling stability. Besides, we have also summarized how above properties can be improved by the design strategy of functional monomers, groups and assembly of batteries. Structures and properties of polymers are investigated here to provide a basis for all-solid-state electrolyte design strategies of multi-component polymers. Meanwhile, adjustment strategies of quasi-solid-state polymer electrolytes such as adding functional additives and carrying out structural design have also been investigated, aiming at solving problems caused by simply adding liquids or small molecular plasticizer. We hope that fresh and established researchers can achieve a general perspective of solid polymer electrolytes via this review, and spur more extensive interests for exploration of high-performance lithium ion batteries.