气候变化领域集成服务门户(CCPortal): "water-in-salt" polymer electrolyte for Li-ion batteries

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DOI	10.1039/d0ee01510e
	"water-in-salt" polymer electrolyte for Li-ion batteries
	Zhang J.; Cui C.; Wang P.-F.; Li Q.; Chen L.; Han F.; Jin T.; Liu S.; Choudhary H.; Raghavan S.R.; Eidson N.; Von Cresce A.; Ma L.; Uddin J.; Addison D.; Yang C.; Wang C.
发表日期	2020
ISSN	17545692
起始页码	2878
结束页码	2887
卷号	13 期号:9
英文摘要	Recent success in extending the electrochemical stability window of aqueous electrolytes to 3.0 V by using 21 mol kg-1 "water-in-salt"(WiS) has raised a high expectation for developing safe aqueous Li-ion batteries. However, the most compatible Li4Ti5O12 anodes still cannot use WiS electrolyte due to the cathodic limit (1.9 V vs. Li/Li+). Herein, a UV-curable hydrophilic polymer is introduced to further extend the cathodic limit of WiS electrolytes and replace the separator. In addition, a localized strongly basic solid polymer electrolyte (SPE) layer is coated on the anode to promote the formation of an LiF-rich SEI. The synthetic impacts of UV-crosslinking and local alkaline SPE on the anodes extend the electrochemical stability window of the solid-state aqueous polymer electrolyte to ∼3.86 V even at a reduced salt concentration of 12 mol kg-1. It enables a separator-free LiMn2O4//Li4Ti5O12 aqueous full cell with a practical capacity ratio (P/N = 1.14) of the cathode and anode to deliver a steady energy density of 151 W h kg-1 at 0.5C with an initial Coulombic efficiency of 90.50% and cycled for over 600 cycles with an average Coulombic efficiency of 99.97%, which has never been reported before for an aqueous LiMn2O4//Li4Ti5O12 full cell. This flexible and long-duration aqueous Li-ion battery with hydrogel WiSE can be widely used as a power source in wearable devices and electrical transportations where both energy density and battery safety are of high priority. An ultra-thick LTO electrode with UV-curable polymer electrolyte as the binder is demonstrated as a solid state battery electrode. And a high-voltage (7.4 V) solid-state bipolar cell is assembled with a solid-state UV-curable polymer as the electrolyte. This journal is © The Royal Society of Chemistry.
英文关键词	Anodes; Crosslinking; Curing; Ions; Lithium compounds; Polyelectrolytes; Separators; Solid electrolytes; Solid state devices; Solid-State Batteries; Titanium compounds; Aqueous electrolyte; Coulombic efficiency; Electrochemical stabilities; Hydrophilic polymers; Initial Coulombic efficiency; Polymer electrolyte; Solid polymer electrolytes; UV curable polymer; Lithium-ion batteries; concentration (composition); electrolyte; equipment component; lithium; performance assessment; polymer
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/189544
作者单位	Department of Chemical and Biomolecular Engineering, University of Maryland, College Park, MD 20742, United States; Department Electrochemistry Branch, Sensor and Electron Devices Directorate, Power and Energy Division, US Army Research Laboratory, Adelphi, MD 20783, United States; Liox Power Inc., Pasadena, CA 91106, United States; Department of Chemistry and Biochemistry, University of Maryland, College Park, MD 20742, United States
推荐引用方式 GB/T 7714	Zhang J.,Cui C.,Wang P.-F.,et al. "water-in-salt" polymer electrolyte for Li-ion batteries[J],2020,13(9).
APA	Zhang J..,Cui C..,Wang P.-F..,Li Q..,Chen L..,...&Wang C..(2020)."water-in-salt" polymer electrolyte for Li-ion batteries.Energy & Environmental Science,13(9).
MLA	Zhang J.,et al.""water-in-salt" polymer electrolyte for Li-ion batteries".Energy & Environmental Science 13.9(2020).