气候变化领域集成服务门户(CCPortal): 4 v room-temperature all-solid-state sodium battery enabled by a passivating cathode/hydroborate solid electrolyte interface

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DOI	10.1039/d0ee01569e
	4 v room-temperature all-solid-state sodium battery enabled by a passivating cathode/hydroborate solid electrolyte interface
	Asakura R.; Reber D.; Duchêne L.; Payandeh S.; Remhof A.; Hagemann H.; Battaglia C.
发表日期	2020
ISSN	17545692
起始页码	5048
结束页码	5058
卷号	13 期号:12
英文摘要	Designing solid electrolytes for all-solid-state-batteries that can withstand the extreme electrochemical conditions in contact with an alkali metal anode and a high-voltage cathode is challenging, especially when the battery is cycled beyond 4 V. Here we demonstrate that a hydroborate solid electrolyte Na4(CB11H12)2(B12H12), built from two types of cage-like anions with different oxidative stability, can effectively passivate the interface to a 4 V-class cathode and prevent impedance growth during cycling. We show that [B12H12]2- anions decompose below 4.2 V vs. Na+/Na to form a passivating interphase layer, while [CB11H12]- anions remain intact, providing sufficient ionic conductivity across the layer. Our interface engineering strategy enables the first demonstration of a 4 V-class hydroborate-based all-solid-state battery combining a sodium metal anode and a cobalt-free Na3(VOPO4)2F cathode without any artificial protective coating. When cycled to 4.15 V vs. Na+/Na, the cells feature a discharge capacity of 104 mA h g-1 at C/10 and 99 mA h g-1 at C/5, and an excellent capacity and energy retention of 78% and 76%, respectively, after 800 cycles at C/5 at <0.2 MPa at room temperature. Increasing the pressure to 3.2 MPa enables a discharge capacity of 117 mA h g-1 at C/10 with a mass loading of 8.0 mg cm-2, corresponding to an areal capacity close to 1.0 mA h cm-2. The cell holds the highest average discharge cell voltage of 3.8 V and specific energy per cathode active material among all-solid-state sodium batteries reported so far, emphasizing the potential of hydroborates as electrolytes for a competitive all-solid-state battery technology. This journal is © The Royal Society of Chemistry.
英文关键词	Anodes; Cathodes; High pressure effects; Interface states; Ions; Potentiometric sensors; Protective coatings; Sodium; Solid state devices; Solid-State Batteries; All-solid state batteries; Cathode active material; Discharge capacities; Electrochemical conditions; High voltage cathode; Interface engineering; Oxidative stability; Solid electrolyte interfaces; Solid electrolytes; detection method; electrode; electrolyte; equipment; temperature effect
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/189430
作者单位	Materials for Energy Conversion, Empa, Swiss Federal Laboratories for Materials Science and Technology, Dübendorf, 8600, Switzerland; Département de Chimie-Physique, Université de Genève, Geneva 4, 1211, Switzerland; Institut des Matériaux, École Polytechnique Fédérale de Lausanne, Lausanne, 1015, Switzerland
推荐引用方式 GB/T 7714	Asakura R.,Reber D.,Duchêne L.,et al. 4 v room-temperature all-solid-state sodium battery enabled by a passivating cathode/hydroborate solid electrolyte interface[J],2020,13(12).
APA	Asakura R..,Reber D..,Duchêne L..,Payandeh S..,Remhof A..,...&Battaglia C..(2020).4 v room-temperature all-solid-state sodium battery enabled by a passivating cathode/hydroborate solid electrolyte interface.Energy & Environmental Science,13(12).
MLA	Asakura R.,et al."4 v room-temperature all-solid-state sodium battery enabled by a passivating cathode/hydroborate solid electrolyte interface".Energy & Environmental Science 13.12(2020).