气候变化领域集成服务门户(CCPortal): High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion

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DOI	10.1039/c9ee03251g
	High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion
	Wang N.; Wang Y.; Bai Z.; Fang Z.; Zhang X.; Xu Z.; Ding Y.; Xu X.; Du Y.; Dou S.; Yu G.
发表日期	2020
ISSN	17545692
起始页码	562
结束页码	570
卷号	13 期号:2
英文摘要	Room-temperature sodium-sulfur (RT-Na-S) batteries are highly desirable for grid-scale stationary energy storage due to their low cost; however, short cycling stability caused by the incomplete conversion of sodium polysulfides is a major issue for their application. Herein, we introduce an effective sulfiphilic host, gold nanodots decorated on hierarchical N-doped carbon microspheres (CN/Au/S), to achieve completely reversible conversion reactions in the S cathode by electrocatalyzing the low-kinetics conversion of Na2S4 into NaS2 (discharge process) or S (charge process). Besides, gold nanodots and N-doped carbon can increase the conductivity of the S cathode and provide strong polar-polar adsorption of sodium polysulfides to alleviate the shuttling effects. When serving as the cathode, the CN/Au/S composite can realize enhanced sulfur utilization, excellent cycling stability, and outstanding rate capability. This work deepens our understanding of the catalytic effect of gold atoms on sulfur molecules, opening a new avenue for cathode design and development of advanced RT-Na-S batteries. © 2020 The Royal Society of Chemistry.
英文关键词	Carbon; Cathodes; Doping (additives); Gold; Nanodots; Polysulfides; Sodium compounds; Sulfur; Catalytic effects; Conversion reactions; Cycling stability; Discharge process; Rate capabilities; Shuttling effect; Sodium sulfur battery; Stationary energy storages; Secondary batteries; adsorption; composite; electrochemical method; electrochemistry; electrode; energy storage; gold; performance assessment; sodium
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/189695
作者单位	Institute for Superconducting and Electronic Materials, University of Wollongong, Innovation Campus, Squires Way, Wollongong, NSW 2500, Australia; Materials Science and Engineering Program, Department of Mechanical Engineering, University of Texas at Austin, Austin, TX 78712, United States
推荐引用方式 GB/T 7714	Wang N.,Wang Y.,Bai Z.,et al. High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion[J],2020,13(2).
APA	Wang N..,Wang Y..,Bai Z..,Fang Z..,Zhang X..,...&Yu G..(2020).High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion.Energy & Environmental Science,13(2).
MLA	Wang N.,et al."High-performance room-temperature sodium-sulfur battery enabled by electrocatalytic sodium polysulfides full conversion".Energy & Environmental Science 13.2(2020).