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首页> 外文会议>8th Asian Conference on Solid State Ionics: Trends in the New Millennium; Dec 15-19, 2002; Langkawi, Malaysia >MESOPOROUS COMPOSITE PEO SOLID POLYMER ELECTROLYTE
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MESOPOROUS COMPOSITE PEO SOLID POLYMER ELECTROLYTE

机译：介孔复合PEO固体聚合物电解质

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摘要

Mesoporous composite solid polymer electrolyte (MCSPE) of PEO:LiClO_4 / SBA - 15 have been synthesized and characterized. The most interesting characteristics of MCSPE are the simultaneous enhancement of ion conductivity and mechanical strength. Solid-state ~7Li NMR spectra identified different lithium species, which can be attributed to: Li~+ ions associated with PEO, interaction of polymer and Li~+ ions on surface and possibly within the channels of mesoporous SBA - 15. The SEM photographs have shown improved inter-phase interaction between polymer and SBA - 15 in the composite electrolyte. The blends exhibited higher degree of LiClO_4 salt dissociation and an optimal conductivity is reached at 10wt.% of SBA - 15. However, at even higher SBA content, the Li:SBA rich domain developed and the conductivity deteriorated. Detail analysis of the NMR results shows in addition to the conduction via the amorphous PEO, a new conducting channel is established through replacing the nearby vacancy ("hole") with lithium ion on the surface and also within the channel of SBA-15. As a result of the synergistic function of polymer and SBA, higher over-all ionic conductivity is observed.
机译：合成并表征了PEO：LiClO_4 / SBA-15的介孔复合固体聚合物电解质（MCSPE）。 MCSPE最有趣的特征是离子电导率和机械强度的同时提高。固态〜7Li NMR光谱确定了不同的锂种类，这可归因于：与PEO相关的Li〜+离子，表面和可能在中孔SBA-15通道内的聚合物与Li〜+离子的相互作用。已显示出复合电解质中聚合物与SBA-15之间的相间相互作用得到改善。共混物表现出更高的LiClO_4盐解离度，并且在10wt。％的SBA-15时达到了最佳电导率。但是，即使在更高的SBA含量下，也会出现富Li：SBA的畴，电导率下降。 NMR结果的详细分析表明，除了通过无定形PEO进行的传导以外，还通过在表面以及SBA-15的通道内用锂离子代替附近的空位（“孔”），建立了新的传导通道。由于聚合物和SBA的协同作用，可以观察到更高的总体离子电导率。

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