Flexible freestanding Fe2O3-SnOx-carbon nanofiber composites for Li ion battery anodes

被引：30

作者：

Joshi, Bhavana N. ^{[1
]}

An, Seongpil

Kim, Yong Il ^{[1
]}

Samuel, Edmund P. ^{[1
]}

Song, Kyo Yong ^{[1
]}

Seong, Il Won ^{[2
]}

Al-Deyab, Salem S. ^{[3
]}

Swihart, Mark T. ^{[4
]}

Yoon, Woo Young ^{[2
]}

Yoon, Sam S. ^{[1
]}

机构：

[1] Korea Univ, Sch Mech Engn, Seoul 02841, South Korea

[2] Korea Univ, Dept Mat Sci & Engn, Seoul 02841, South Korea

[3] King Saud Univ, Dept Chem, Petrochem Res Chair, Riyadh 11451, Saudi Arabia

[4] SUNY Buffalo, Dept Chem & Biol Engn, Buffalo, NY 14260 USA

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2017年 / 700卷

基金：

新加坡国家研究基金会;

关键词：

Carbon nanofiber; Fe2O3; SnOx; Electrospinning; Freestanding; Lithium ion battery; CARBON NANOFIBERS; SNO2; NANOPARTICLES; LITHIUM STORAGE; PERFORMANCE; NANOCOMPOSITE; CAPACITY; FILMS;

D O I：

10.1016/j.jallcom.2017.01.057

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

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.

引用

页码：259 / 266

页数：8

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