Ultrafine ternary metal oxide particles with carbon nanotubes: a metal-organic-framework-based approach and superior lithium-storage performance

• Published in: Dalton transactions : an international journal of inorganic chemistry Vol. 48; no. 13; pp. 4413 - 4419
• Main Authors: Tang, Xuxu, Liang, Ming, Zhang, Yanfeng, Sun, Weiwei, Wang, Yong
• Format: Journal Article
• Language: English
• Published: England Royal Society of Chemistry 26.03.2019
• Subjects: Carbon; Carbon nanotubes; Carbonaceous materials; Cycles; Flux density; Lithium; Lithium-ion batteries; Metal oxides; Morphology; Nanoparticles; Raman spectra; Rechargeable batteries; Storage batteries; Ultrafines; X ray photoelectron spectroscopy; Zinc oxide
• ISSN: 1477-9226; 1477-9234
• DOI: 10.1039/c8dt05055d

Aiming to achieve metal-oxide-based electrodes for Li-ion batteries with enhanced energy density and cycling life, especially overcoming their negative volume expansion during cycling, more effort should be devoted to the exploration of the combination of morphology-controlled metal oxides with carbonaceous materials. In this work, we select dual/single-metallic organic frameworks immobilized on the surface of carbon nanotubes as the precursors to synthesize composites of ternary/single metal oxides with carbon nanotubes (ZnCo2O4@CNTs and ZnO@CNTs). The main product, ZnCo2O4@CNTs, consists of ultrafine ZnCo2O4 nanoparticles embedded deeply in the carbon nanotubes. The existence of small-size ternary metal oxides as well as the carbon nanotubes results in outstanding lithium-storage properties of the ZnCo2O4@CNT anode for lithium-ion batteries. It delivers an extremely high capacity (1507 mA h g-1, 100 mA g-1) after 200 cycles, which is larger than the theoretical value.