https://scholars.lib.ntu.edu.tw/handle/123456789/408988
標題: | High Polarity Poly(vinylidene difluoride) Thin Coating for Dendrite-Free and High-Performance Lithium Metal Anodes | 作者: | Luo J. Fang C.-C. Wu N.-L. |
關鍵字: | dendrite suppression;high current density;lithium metal anodes;poly(vinylidene difluoride) | 公開日期: | 2018 | 卷: | 8 | 期: | 2 | 來源出版物: | Advanced Energy Materials | 摘要: | The high-polarity £]-phase poly(vinylidene difluoride) (£]-PVDF), which has all trans conformation with F and H atoms located on the opposite sides of the polymer backbone, is demonstrated to be a promising artificial solid-electrolyte interphase coating on both Cu and Li metal anodes for dendrite-free Li deposition/stripping and enhanced cycling performance. A thin (?4 ?m) £]-PVDF coating on Cu enables uniform Li deposition/stripping at high current densities up to 5 mA cm ?2 , Li-plating capacity loadings of up to 4 mAh cm ?2 , and excellent cycling stability over hundreds of cycles under practical conditions (1 mA cm ?2 with 2 mAh cm ?2 ). Full cells containing an LiFePO 4 cathode and an anode of either £]-PVDF coated Cu or Li also exhibit excellent cycling stability. The profound effects of the high-polarity PVDF coating on dendrite suppression are attributed to the electronegative F-rich interface that favors layer-by-layer Li deposition. This study offers a new strategy for the development of dendrite-free metal anode technology. ? 2017 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim |
URI: | https://scholars.lib.ntu.edu.tw/handle/123456789/408988 | ISSN: | 16146832 | DOI: | 10.1002/aenm.201701482 |
顯示於: | 化學工程學系 |
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