https://scholars.lib.ntu.edu.tw/handle/123456789/598249
標題: | Tough Polymer Electrolyte with an Intrinsically Stabilized Interface with Li Metal for All-Solid-State Lithium-Ion Batteries | 作者: | Lee J.-Y Chung P.-H Yeh S.-C Yu T.-Y Lee W.-Y Wu N.-L NAE-LIH WU RU-JONG JENG |
關鍵字: | Electrodes;Ethylene;Fluorine compounds;Interface states;Ionic strength;Lithium compounds;Lithium-ion batteries;Nanofibers;Polyelectrolytes;Polyethylene oxides;Tensile strength;All-solid state;All-solid-state lithium ion batteries;Bis(trifluoromethane sulfonyl)imide;Li metal;Performance;Polymer electrolyte;Short circuiting;Solid polymer electrolyte membranes;Solid polymer electrolytes;Stabilized interfaces;Solid electrolytes | 公開日期: | 2021 | 卷: | 125 | 期: | 48 | 起(迄)頁: | 26339-26347 | 來源出版物: | Journal of Physical Chemistry C | 摘要: | A high-performance solid polymer electrolyte (SPE) membrane that simultaneously addresses the issues of enhanced toughness and Li-dendrite mitigation for all-solid-state Li-ion batteries (ASSLIBs) is demonstrated. The membrane has a sandwiched structure consisting of a center poly(ethylene oxide)/lithium bis(trifluoromethanesulfonyl) imide (PEO/LiTFSI) electrolyte matrix laminated on both sides with electrospun high-polarity β-phase poly(vinylidene fluoride-co-hexafluoropropylene) (β-PVDF-HFP) nanofibers. The nanofiber layers impart remarkable enhancement in both mechanical and electrochemical properties of the SPE, including a 20-fold increase in tensile strength and a 48-fold increase in toughness, along with up to 4-fold enhancement in Li-ionic conductivity. Moreover, the highly polar fluorinated nanofiber cladding layers enable a stable Li-plating/stripping interface on the Li anode to efficiently mitigate dendrite formation, while improving the electrochemical interfacial stability with the cathode. In a Li|SPE|Li symmetric cell, the use of the sandwiched SPE is demonstrated to improve the cycle stability from short-circuiting at 144 h for a pristine PEO/LiTFSI membrane to no short-circuiting even up to 3600 h (1800 Li-plating-stripping cycles). In an example of LiFePO4|SPE|Li ASSLIBs, using the sandwiched membrane enables substantial reduction irreversible capacity upon charging to the high-voltage end and more than 80% capacity retention for over 1600 h. This work presents a feasible and facile design for an SPE for high-performance ASSLIBs. ? 2021 American Chemical Society. |
URI: | https://www.scopus.com/inward/record.uri?eid=2-s2.0-85120384731&doi=10.1021%2facs.jpcc.1c07359&partnerID=40&md5=f73526020424912d7299a6bec54a51b8 https://scholars.lib.ntu.edu.tw/handle/123456789/598249 |
ISSN: | 19327447 | DOI: | 10.1021/acs.jpcc.1c07359 |
顯示於: | 化學工程學系 |
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