Journal Article

Bimetal cobalt-zinc MOF and its derivatives as anode materials for lithium-ion batteries

Zhang, Yongfeng, Wang, Liying, Chen, Guohua, Cao, Zhenzhu, Hou, Yaping, Liu, Yunfei, Dong, Shanghai

2022

Overview

The purplish-red rod-like crystal structure of novel bimetallic metal–organic-frameworks (MOF) CoZn[(4,4′-BDA)(Phen)]2n has been obtained by the reaction of Co2+, Zn2+ (the molar ratio Co: Zn = 1:1), 1,10-phenanthroline (Phen) and 4, 4′-biphenyldicarboxylic acid (4,4′-H2BDA), in which Zn ions of the previously reported monometallic MOF [Zn(4,4′-BDA)(Phen)]2·(HCON(CH3)2n are partly substituted by Co ions. The crystal structure of CoZn[(4,4′-BDA)(Phen)]2n has been characterized by IR, X-ray photoelectron spectroscopy (XPS), and single-crystal X-ray diffraction analysis. Then, the precursors CoZn-MOF-B@C were obtained by adding a surfactant, activated carbon, and NaOH. Its derivative ZnO/CoO@C was used as anode material for lithium-ion batteries, which showed good lithium storage performance. The initial discharge specific capacity of ZnO/CoO@C is 1437.9 mAh g−1 at a current density of 0.2 A g−1, and after 100 cycles, the specific capacity drops to 741.8 mAh g−1.

• Publisher: Springer Nature B.V
• Subject: Activated carbon / Anodes / Batteries / Bimetals / Cobalt / Crystal structure / Electrode materials / Electrodes / Electrolytes / Energy storage / Fourier transforms / Lithium / Lithium-ion batteries / Metal-organic frameworks / Morphology / Nitrates / Photoelectrons / Pore size / Radiation / Scanning electron microscopy / Single crystals / Temperature / Work stations / X ray photoelectron spectroscopy / Zinc oxide