聚丙烯腈
阳极
静电纺丝
材料科学
碳化
锂(药物)
碳纳米纤维
纳米纤维
氧化物
化学工程
碳纤维
电极
纳米技术
化学
复合材料
冶金
碳纳米管
复合数
聚合物
扫描电子显微镜
内分泌学
物理化学
工程类
医学
作者
Zhuo Li,Xianwei Hu,Zhongning Shi,Jinlin Lu,Zhaowen Wang
标识
DOI:10.1016/j.apsusc.2020.147290
摘要
The lithium storage performance of metal oxides often suffer rapid capacity fading and poor rate performance due to their huge volume expansion during repeated charge and discharge processes. Herein, a facile strategy was adopted for constructing a three-dimensional (3D) interconnected conductive network. Metal-organic frameworks (MOFs)-derived metal oxides (Fe2O3, ZnO) were inlayed in carbon nanofibers through electrospinning and subsequent carbonization processes. As lithium-ion storage materials, the MOFs-derived metal oxide composite nanofibers exhibited a high specific capacity and an excellent rate capability due to the unique structural characteristics of high electrical conductivity, additional Li-storage sites, and defined frameworks. The Fe2O3@polyacrylonitrile (PAN) and [email protected] composite nanofibers deliver high initial specific capacities of 1571.4 and 1053.8 mAh g−1 at 50 mA g−1, respectively. Moreover, Fe2O3@ PAN and [email protected] composite nanofibers retained reversible specific capacities of 506.6 and 455.4 mAh g−1 at 1000 mA g−1 after 500 cycles, respectively. Additionally, the diffusion kinetics analysis indicated a relatively fast Li-ion diffusivity for the composite nanofibers.
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