气候变化领域集成服务门户(CCPortal): A quasi-solid-state rechargeable cell with high energy and superior safety enabled by stable redox chemistry of Li2S in gel electrolyte

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DOI	10.1039/d0ee03037f
	A quasi-solid-state rechargeable cell with high energy and superior safety enabled by stable redox chemistry of Li2S in gel electrolyte
	Meng X.; Liu Y.; Wang Z.; Zhang Y.; Wang X.; Qiu J.
发表日期	2021
ISSN	17545692
起始页码	2278
结束页码	2290
卷号	14 期号:4
英文摘要	Recent years have witnessed a thriving pursuit of high-energy Li metal batteries for replacing the existing Li-ion batteries. However, the cell chemistry involving extremely reactive Li metal anodes in flammable organic liquid electrolytes raises serious problems in battery performance and safety. Herein, we report on achieving high energy and superior safety in a quasi-solid-state rechargeable cell design in terms of Li metal-free stable redox chemistry between a Li2S cathode and Si anode in gel polymer electrolyte with favorable interfacial properties, ionic conductivity and robustness. This chemistry ensures intrinsically high safety even under extreme conditions by eliminating the uncontrolled exothermic chain reactions in the cells. A nanospace-confined bifunctional electrocatalytic adsorber is designed to minimize the diffusion restriction of the Li2S cathode in the gel electrolyte, while the Si anode is strengthened by a multilevel hollow design. The obtained quasi-solid-state rechargeable Li2S\|\|Si full cells deliver a high specific energy of up to 802 W h kgLi2S+Si-1 with high durability, low self-discharge, and good temperature adaptability from -20 to 60 °C. Meanwhile, the cells exhibit excellent safety against mechanical damage, overheating and short circuit in the air or water, offering high reliability for practical use. This journal is © The Royal Society of Chemistry.
英文关键词	Anodes; Cathodes; Ionic conduction in solids; Lithium compounds; Lithium-ion batteries; Polyelectrolytes; Silicon; Solid electrolytes; Battery performance; Diffusion restrictions; Extreme conditions; Gel polymer electrolytes; Interfacial property; Mechanical damages; Organic liquid electrolytes; Rechargeable cells; Sulfur compounds; cell; electrolyte; energy; gel; lithium; redox conditions; safety; solid
语种	英语
来源期刊	Energy & Environmental Science
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/190710
作者单位	State Key Lab of Fine Chemicals, Liaoning Key Lab for Energy Materials and Chemical Engineering, PSU-DUT Joint Center for Energy Research, Dalian University of Technology, Dalian, 116024, China; College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
推荐引用方式 GB/T 7714	Meng X.,Liu Y.,Wang Z.,et al. A quasi-solid-state rechargeable cell with high energy and superior safety enabled by stable redox chemistry of Li2S in gel electrolyte[J],2021,14(4).
APA	Meng X.,Liu Y.,Wang Z.,Zhang Y.,Wang X.,&Qiu J..(2021).A quasi-solid-state rechargeable cell with high energy and superior safety enabled by stable redox chemistry of Li2S in gel electrolyte.Energy & Environmental Science,14(4).
MLA	Meng X.,et al."A quasi-solid-state rechargeable cell with high energy and superior safety enabled by stable redox chemistry of Li2S in gel electrolyte".Energy & Environmental Science 14.4(2021).