Eco-Friendly Fabricated Porous Carbon Nanofibers Decorated with Nanosized SnOx as High-Performance Lithium-Ion Battery Anodes

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• 作者：Yuan Liu ; Xiaodong Yan ; Yunhua Yu ; Xiaoping Yang
• 刊名：ACS Sustainable Chemistry & Engineering
• 出版年：2016
• 出版时间：June 6, 2016
• 年：2016
• 卷：4
• 期：6
• 页码：2951-2959
• 全文大小：649K
• 年卷期：0
• ISSN：2168-0485

文摘

In this work, one-dimensional polyvinylpyrrolidone-derived porous carbon nanofibers decorated with SnO_x nanoparticles (denoted as SnO_x@PCNFs) were prepared by an electrospinning technique, followed by a simple one-step heat treatment and a postetching process. The structural evolution of SnO_x and the morphological change of the carbon nanofiber webs during the heat treatment are investigated by varying the content of the SnO_x precursor in the electrospinning solutions. The highly interconnected pores, created by etching off the in situ generated SiO₂ template in the carbon nanofibers, are beneficial for the easy penetration of Li⁺-carrying electrolyte into the nanocomposites and thus enable the direct contact between embedded SnO_x nanoparticles and electrolyte. When tested as anode materials for lithium-ion batteries, SnO_x@PCNFs with optimal SnO_x component show outstanding initial reversible capacity of 1057 mA h g^–1 at 0.2 A g^–1, long cycling capability (511 mA h g^–1 at 1 A g^–1 after 900 cycles), and good rate performance (323 mA h g^–1 at 2 A g^–1). The remarkable electrochemical properties of the nanocomposites can be attributed to the highly interconnected pores, high surface area, and well-controlled SnO_x nanoparticles.