期刊
CHEMICAL ENGINEERING JOURNAL
卷 421, 期 -, 页码 -出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cej.2020.127755
关键词
Electrospinning; Anode; Metal sulfides; Lithium-ion batteries; Sodium-ion batteries
资金
- National Natural Science Foundation of China [51871119, 21703204, 51901100]
- Fundamental Research Funds for the Central Universities [NE2017004, NS2018040]
- Jiangsu Provincial Founds for Natural Science Foundation [BK20170793, BK20180015]
- Six Talent Peak Project of Jiangsu Province [2018XCL033]
- China Postdoctoral Science Foundation [2018M640481, 2019T120426]
- Jiangsu Postdoctoral Research Fund [2019K003, 2019K201]
A reliable synthetic approach was reported for the in-situ growth of Co-based ZIF-67 on electrospun nanofibers, followed by carbonization and sulfurization to form Co1-xS hollow polyhedrons anchored on multichannel carbon nanofibers (Co1-xS/MCF) for LIBs and SIBs. The resulting binder-free Co1-xS/MCF anode demonstrated advanced electrochemical properties for both LIBs and SIBs, attributed to the unique multichannel nanostructure and Co1-xS hollow polyhedrons providing active sites and reducing structural strain.
The exploration of prospective electrode materials represents great challenges for remarkable lithium-ion batteries (LIBs) and sodium-ion batteries (SIBs). Herein, we report a reliable synthetic approach for the in-situ growth of the Co-based zeolitic imidazolate framework (ZIF-67) on electrospun nanofibers, followed by carbonization and sulfurization with the formation of free-standing Co1-xS hollow polyhedrons anchored on multichannel carbon nanofibers (Co1-xS/MCF) for LIBs and SIBs. The Co1- xS/MCF electrode displays a high reversible capacity (813 mAh g-1 over 180 cycles at 0.1 A g-1), and stable cycle performance (559 mAh g-1 for 300 cycles at 1 A g-1) in LIBs. For SIBs, Co1-xS/MCF electrode exhibits a favorable Na-storage capacity (433 mAh g-1 over 120 cycles at 0.1 A g-1). The as-prepared binder-free Co1- xS/MCF anode demonstrates the advanced electrochemical properties for LIBs and SIBs. It is attributed to the particular multichannel nanostructure and the Co1- xS hollow polyhedrons (Co1-xS HPs), which provide enough active sites, and the internal void space effectively reduces the structural strain and eases the volume expansion to maintain structural integrity. This work gives insights to design a unique structure for promising LIBs and SIBs.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据