Physics Department & Shanghai Key Laboratory of Magnetic Resonance, East China Normal University, North Zhongshan Road 3663, 200062 Shanghai (P. R. China).
Angew Chem Int Ed Engl. 2014 Apr 1;53(14):3631-5. doi: 10.1002/anie.201307423. Epub 2014 Mar 5.
A new category of crystalline polymer electrolyte prepared by the supramolecular self-assembly of polyethylene oxide (PEO), α-cyclodextrin (α-CD), and LiAsF6 is reported. The polymer electrolyte consists of the nanochannels formed by α-CDs in which the PEO/Li(+) complexes are confined. The nanochannels formed by α-CD provide the pathway for the directional motion of Li(+) ions and at the same time prevent the access of the anions by size exclusion, resulting in good separation of the Li(+) ions and the anions. The conductivity of the reported material is 30 times higher than that of the comparable PEO/Li(+) complex crystal at room temperature. By using state-of-art solid-state NMR spectroscopy, the structure and dynamics of the material were investigated in detail. The dynamics of the Li(+) ions was studied and correlated to the ionic conductivity of the material.
一种由聚环氧乙烷（PEO）、α-环糊精（α-CD）和 LiAsF6 通过超分子自组装制备的新型结晶聚合物电解质被报道。该聚合物电解质由 α-CD 形成的纳米通道组成，其中限制了 PEO/Li(+)配合物。α-CD 形成的纳米通道为 Li(+)离子的定向运动提供了途径，同时通过尺寸排阻阻止阴离子进入，从而实现了 Li(+)离子和阴离子的良好分离。所报道材料的电导率在室温下比可比的 PEO/Li(+)配合物晶体高 30 倍。通过使用最先进的固态 NMR 光谱学，详细研究了该材料的结构和动力学。研究了 Li(+)离子的动力学，并将其与材料的离子电导率相关联。
