Premium
Segmental Dynamics of PEO/LiClO 4 Complex Crystals and Their Influence on the Li + ‐Ion Transportation in Crystal Lattices: A 13 C Solid‐State NMR Approach
Author(s) -
Gao Yangwen,
Hu Bingweng,
Yao Yefeng,
Chen Qun
Publication year - 2011
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201100788
Subject(s) - ionic conductivity , ion , solid state nuclear magnetic resonance , crystal structure , crystallography , materials science , ionic bonding , phase (matter) , polymer , chemical physics , nuclear magnetic resonance spectroscopy , fast ion conductor , electrolyte , chemistry , nuclear magnetic resonance , stereochemistry , physics , organic chemistry , electrode , composite material
The structure and chain dynamics of polyethylene oxide (PEO)/LiClO 4 complex crystals were studied by employing state‐of‐the‐art solid‐state 13 C NMR techniques. Remarkable helical jump motions of the PEO segments in the complex crystals at ambient temperatures were clearly demonstrated. The jump motions are believed to induce the transportation of the coordinated Li + ions along the crystallographic c axis, providing a novel mechanism of ionic conductivity of the complex crystals. In addition, this work also shows that solid‐state high‐resolution 13 C NMR spectroscopy can be a powerful and general tool for elucidating phase structures, dynamics, and subsequently the conduction mechanism of crystalline polymer electrolytes.