期刊
JOURNAL OF ALLOYS AND COMPOUNDS
卷 700, 期 -, 页码 259-266出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2017.01.057
关键词
Carbon nanofiber; Fe2O3; SnOx; Electrospinning; Freestanding; Lithium ion battery
资金
- Global Frontier Program through the Global Frontier Hybrid Interface Materials (GFHIM) of the National Research Foundation of Korea (NRF) - Ministry of Science, ICT and Future Planning [2013M3A6B1078879]
- Technology Development Program to Solve Climate Changes [NRF-2016M1A2A2936760]
- King Saud University
We demonstrate electrospun ternary Fe2O3-SnOx-carbon nanofiber (CNF) composites as highperformance, flexible, and freestanding anodes for Li ion batteries (LIBs). In the ternary composites, the CNF matrix accommodates volume changes of Fe and Sn during lithiation and delithiation, while also providing short Li ion diffusion pathways, which ultimately enhances the capacity of the LIB. The concentrations of Fe and Sn were varied to find the optimal composition. Higher Sn content increased capacity at slow discharge rates, but decreased capacity at higher discharge rates. Increasing Fe to Sn ratio improved performance at high discharge rates. The Fe2O3-SnOx-CNF composite fabricated at a Fe:Sn weight ratio of 3:1 exhibited a reversible capacity value of 756 mAh-g(-1) after 55 cycles. The materials and methods demonstrated here are unique in producing a flexible, free-standing mat with high gravimetric capacity using a simple and scalable production process. (C) 2017 Elsevier B.V. All rights reserved.
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