ZIF-67-Derived CoSe/NC Composites as Anode Materials for Lithium-Ion Batteries

• Published in: Nanoscale research letters Vol. 14; no. 1; pp. 358 - 11
• Main Authors: Li, Zongyang, Zhang, Lian Ying, Zhang, Lei, Huang, Jiamu, Liu, Hongdong
• Format: Journal Article
• Language: English
• Published: New York Springer US 02.12.2019; Springer Nature B.V; SpringerOpen
• Subjects: Anode materials; Anodes; Batteries; Bonding strength; Chemistry and Materials Science; Composite materials; CoSe; Electrical conductivity; Electrical resistivity; Electrode materials; Lithium; Lithium-ion batteries; Materials Science; Molecular Medicine; Nano Express; Nanochemistry; Nanoparticles; Nanoscale Science and Technology; Nanotechnology; Nanotechnology and Microengineering; Organic chemistry; Rechargeable batteries; Selenide; Selenium; Work capacity; ZIF-67; Lithium-ion batteries; CoSe; ZIF-67; Anode materials
• ISSN: 1931-7573; 1556-276X
• DOI: 10.1186/s11671-019-3194-5

As a typical metal selenide, CoSe is a kind of foreground anode material for lithium-ion batteries (LIBs) because of its two-dimensional layer structure, good electrical conductivity, and high theoretical capacity. In this work, the original CoSe/N-doped carbon (CoSe/NC) composites were synthesized using ZIF-67 as a precursor, in which the CoSe nanoparticles are encapsulated in NC nanolayers and they are connected through C–Se bonds. The coating structure and strong chemical coupling make the NC nanolayers could better effectively enhance the lithium storage properties of CoSe/NC composites. As a consequence, the CoSe/NC composites deliver a reversible capacity of 310.11 mAh g −1 after 500 cycles at 1.0 A g −1 . Besides, the CoSe/NC composites show a distinct incremental behavior of capacity.