Materials Science and Engineering Program and Department of Mechanical Engineering, The University of Texas at Austin, Austin, TX, 78712, USA.
Angew Chem Int Ed Engl. 2018 Feb 19;57(8):2096-2100. doi: 10.1002/anie.201710841. Epub 2018 Jan 16.
Solid-state electrolytes have emerged as a promising alternative to existing liquid electrolytes for next generation Li-ion batteries for better safety and stability. Of various types of solid electrolytes, composite polymer electrolytes exhibit acceptable Li-ion conductivity due to the interaction between nanofillers and polymer. Nevertheless, the agglomeration of nanofillers at high concentration has been a major obstacle for improving Li-ion conductivity. In this study, we designed a three-dimensional (3D) nanostructured hydrogel-derived Li La TiO (LLTO) framework, which was used as a 3D nanofiller for high-performance composite polymer Li-ion electrolyte. The systematic percolation study revealed that the pre-percolating structure of LLTO framework improved Li-ion conductivity to 8.8×10 S cm at room temperature.
固态电解质作为下一代锂离子电池中现有液体电解质的替代品，具有更好的安全性和稳定性，备受关注。在各种类型的固体电解质中，由于纳米填料与聚合物之间的相互作用，复合聚合物电解质表现出可接受的锂离子电导率。然而，纳米填料在高浓度下的团聚一直是提高锂离子电导率的主要障碍。在这项研究中，我们设计了一种三维（3D）纳米结构水凝胶衍生的 LiLaTiO（LLTO）框架，将其用作高性能复合聚合物锂离子电解质的 3D 纳米填料。系统的渗流研究表明，LLTO 框架的预渗流结构将室温下的锂离子电导率提高到 8.8×10 S cm。
