Chapter 17: Applications of Solid-state NMR in Crystalline Solid Polymer Electrolytes

Recent progress in solid-state NMR studies on the structure and dynamics of solid crystalline polymer electrolytes has been reviewed in this chapter. The content of the chapter is arranged as follows: firstly, the background knowledge about solid-state polymer electrolyte (SPE) materials is introduced briefly. Secondly, we will review the solid-state ¹³C NMR studies on the structure and dynamics of the crystalline PEO/Li⁺ complex SPEs, focusing on the helical jump motions of the chain segments in the complex crystal. Afterwards, ²H/¹H NMR studies on cyclodextrin-PEO_n/Li⁺ (CD-PEO_n/Li⁺) complex crystalline SPEs are discussed, demonstrating how the complicated structure and dynamics of the PEO chains in these crystalline SPE systems can be well tackled by well-designed solid-state NMR techniques. In the final part of this chapter, the application of ⁷Li NMR on crystalline SPEs is reviewed. We intend to demonstrate that advanced NMR combined with other analytical techniques now can provide very detailed knowledge about the structure and dynamics of solid crystalline polymer electrolyte systems.