# Solid-State Ion-Conducting Multiblock Terpolymers

## TL;DR

This paper explores new polymer materials that can conduct ions efficiently by using three different chemical blocks to create better structures.

## Contribution

The paper introduces multiblock terpolymers with three chemistries that enable more 3D network morphologies and higher ion conductivity.

## Key findings

- Multiblock terpolymers show more 3D continuous network morphologies than copolymers.
- They achieve higher morphology factors and electrochemical performance.
- Only 12 morphologies have been observed so far, suggesting room for discovery.

## Abstract

Solid-state multiblock
copolymers with two distinct chemistries
are well explored and reveal that three-dimensional (3D) continuous
network morphologies result in the highest ion conductivities, morphology
factors (normalized ion conductivity), and subsequently the highest
electrochemical performance. However, these polymers exhibit a limited
set of 3D morphologies over a narrow compositional range. Solid-state
multiblock terpolymers with three distinct chemistries significantly
enhance the accessible phase space and yield more 3D continuous network
morphologies over a broader compositional range, yet they are relatively
unexplored. In this perspective, solid-state ion-conducting multiblock
terpolymers are reviewed, and the results highlight more observed
3D continuous network morphologies and exceptionally higher morphology
factors compared to their multiblock copolymer counterparts. To date,
only 12 morphologies have been observed in ion-conducting multiblock
terpolymers. Future investigations with targeted synthesis can discover
many more morphologies, and therefore unlock a new set of materials
with ultrahigh ion conductivities and electrochemical performance.