期刊
NANO ENERGY
卷 37, 期 -, 页码 81-89出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.nanoen.2017.05.012
关键词
Metal sulfides; Iron sulfides; Nanomaterials; Anode; Sodium ion batteries
类别
资金
- Singapore National Research Foundation within the programme TUM CREATE (Campus for Research Excellent and Technological Enterprise)
As a potential alternative to the prevailing lithium ion batteries, the application of sodium (Na) ion batteries (NIBs) in renewable energy and smart grid have revitalized research interest for large-scale energy storage. One of the roadblocks hindering their future commercialization is the development of suitable anode materials. Herein, we present the large-scale preparation of highly uniform iron sulfide (Fe1-xS) nanostructures by a costeffective and versatile one-step sulfurization strategy. Impressively, as a high-rate and viable sodium-ion anode, the as-prepared Fe1-xS nanostructure manifests appealing electrochemical performance (a high discharge capacity of 563 mA h g(-1) over 200 cycles at a current density of 100 mA g(-1) and outstanding cycling stability even at high rate of 10 A g(-1) up to 2000 cycles). Moreover, the proven pseudocapacitance contribution interprets the unprecedented rate capability. Meanwhile, the sodium storage mechanism in the as-prepared samples has also been investigated by using the in-situ X-ray diffraction techniques. Remarkably, a full cell based on Na0.6Co0.1Mn0.9O2 cathode and Fe1-xS anode deliver high discharge capacity (393 mA h g(-1)) and superior cycling stability.
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