사업단 성과
사업단 성과
분야
Lithium dendrite growth
학술지구분
SCI
JCR
Q1 14%
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Abstract
Lithium-ion batteries (LIBs) are considered a promising industry for long-range electric vehicles due to their extended lifespan, high energy density, and low self-discharge rate. To improve the safety of LIBs, component materials (e.g. cathodes, anodes, electrolytes, and separators) with high electrochemical performance and safety must be developed. In particular, the separator is a significant component of LIBs that affects the electrochemical performance and safety of batteries. However, unexpected lithium (Li) dendrite growth in LIBs can easily penetrate the separator, resulting in short circuits and safety problems. Functional separators are the most useful method that can prohibit the formation of Li dendrites since they create a mechanical barrier and regulate Li ion deposition and transport, without obviously expanding the volume or weight of the LIBs. In this review, we aim to provide a comprehensive overview of contemporary techniques to remain the dendrite free from an electrochemical and safety perspective. This includes: (i) the mechanisms in functional separators to block the Li dendrite growth, (ii) synthesis methods of various functional separators, and (iii) coating methods for improving the electrochemical performance of separators. The relationship between the material and coating process of the separators, as well as their effect on the performance of LIBs, is thoroughly discussed. Also, future directions for the development of high-safety LIBs are presented.