分离器(采油)
材料科学
电解质
阴极
膜
陶瓷
离子
聚合物
纳米技术
锂(药物)
化学工程
电极
复合材料
化学
医学
热力学
物理
工程类
内分泌学
物理化学
有机化学
生物化学
作者
Wonsung Choi,Mokwon Kim,Jung O. Park,Joon-Hee Kim,Kyung-Hwan Choi,Yong‐Su Kim,Tae Young Kim,Ken Ogata,Dongmin Im,Seok‐Gwang Doo,Yunil Hwang
标识
DOI:10.1038/s41598-017-12207-8
摘要
Lithium-metal-based batteries, owing to the extremely high specific energy, have been attracting intense interests as post-Li-ion batteries. However, their main drawback is that consumption/de-activation of lithium metal can be accelerated when O2 or S used in the cathode crosses over to the metal, reducing the lifetime of the batteries. In use of ceramic solid state electrolyte (SSE) separator, despite the capability of gas blocking, thick and heavy plates (~0.3 mm) are necessitated to compensate its mechanical fragility, which ruin the high specific energy of the batteries. Here, we demonstrate fabrication of a new membrane made of micron-sized SSE particles as Li-ion channels embedded in polymer matrix, which enable both high Li-ion conduction and gas-impermeability. Bimodal surface-modification was used to control the energy of the particle/polymer interface, which consequently allowed channel formation via a simple one-step solution process. The practical cell with the new membrane provides a cell-specific energy of over 500 Wh kg-1, which is the highest values ever reported.
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