| 초록 |
From the viewpoint of preventing internal short-circuit failures in a lithium-ion battery, a separator is considered a key component to secure the battery safety, because its primary function is to keep physical isolation between a cathode and an anode of a battery so that no electrons can flow between them. In general, separators in lithium-ion batteries are made mostly of polyolefins. Though these polyolefin separators are widespread and have many advantages, their poor thermal stability and mechanical strength have raised serious concerns in maintaining the electrical isolation between electrodes. In this presentation, in an effort to breakthrough these limitations of the polyolefin-based separators, we demonstrate new nanostructure-tailored composite separators. In comparison to a commercialized PE separator, the composite separators offer noticeable superiority in thermal stability, liquid electrolyte wettability, ion transport, and finally cell performances. |
