气候变化领域集成服务门户(CCPortal): Foldable potassium-ion batteries enabled by free-standing and flexible SnS2@C nanofibers

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DOI	10.1039/d0ee02919j
	Foldable potassium-ion batteries enabled by free-standing and flexible SnS2@C nanofibers
	Li D.; Dai L.; Ren X.; Ji F.; Sun Q.; Zhang Y.; Ci L.
发表日期	2021
ISSN	17545692
起始页码	424
结束页码	436
卷号	14 期号:1
英文摘要	Potassium-ion batteries (PIBs) have been regarded as promising alternatives to lithium-ion batteries in large-scale energy storage systems owing to the high abundance and low cost of potassium. However, the large radius of the K-ion hinders the development of suitable electrode materials. In this work, we confine SnS2 in N,S co-doped carbon nanofibers as anode materials for PIBs with high reversible capacity (457.4 mA h g-1@0.05 A g-1), remarkable cycling stability (1000 cycles@2.0 A g-1), and superior rate capability (219.4 mA h g-1@5.0 A g-1), overmatching most of the reported studies. The origin of the high reversible capacity is revealed by in situ XRD techniques. The combined capacitive and diffusion-controlled behaviors are disentangled through consecutive CV measurements. Combining the Randles-Sevcik equation and dQ/dV plots, correlations between the K-ion storage behaviors and diffusion kinetics at various potassiation depths are constructed. Theoretical calculations on K adsorption affinities at various N,S co-doped sites illuminate the synergistic effects of the N,S co-doping strategy in boosting the K-ion transport kinetics. Moreover, foldable potassium-ion full cells are successfully assembled with stable cycling performance, showing application potential in flexible electronic devices. These findings will boost the rational design and mechanistic understanding of anode materials in PIBs and related energy storage devices. © The Royal Society of Chemistry.
英文关键词	Anodes; Carbon nanofibers; Energy storage; Ions; IV-VI semiconductors; Lithium-ion batteries; Potassium; Semiconducting tin compounds; Storage (materials); Tin compounds; Diffusion controlled; Diffusion kinetics; Electrode material; Energy storage systems; Flexible electronic devices; High reversible capacities; Synergistic effect; Theoretical calculations; Nitrogen compounds; electrode; energy storage; fuel cell; kinetics; nanoparticle; performance assessment; potassium
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/190821
作者单位	State Key Laboratory of Advanced Welding and Joining, School of Materials Science and Engineering, Harbin Institute of Technology, Shenzhen, 518055, China; Research Center for Carbon Nanomaterials, Key Lab. for Liquid-Solid Structural Evolution and Processing of Materials (Ministry of Education), School of Materials Science and Engineering, Shandong University, Jinan, 250061, China; School of Water Conservancy and Environment, University of Jinan, Jinan, 250022, China
推荐引用方式 GB/T 7714	Li D.,Dai L.,Ren X.,et al. Foldable potassium-ion batteries enabled by free-standing and flexible SnS2@C nanofibers[J],2021,14(1).
APA	Li D..,Dai L..,Ren X..,Ji F..,Sun Q..,...&Ci L..(2021).Foldable potassium-ion batteries enabled by free-standing and flexible SnS2@C nanofibers.Energy & Environmental Science,14(1).
MLA	Li D.,et al."Foldable potassium-ion batteries enabled by free-standing and flexible SnS2@C nanofibers".Energy & Environmental Science 14.1(2021).