N-doped Carbon Coated CoO Nanowire Arrays Derived from Zeolitic Imidazolate Framework-67 as Binder-free Anodes for High-performance Lithium Storage

Abstract

To realize large lithium storage capacity and excellent rate capability lithium ion batteries, highly electrochemically active materials and rational design of structure are desirable. Here, we successfully synthesized CoO@N-doped carbon nanowire arrays derived from zeolitic imidazolate frameworks-67 (ZIF-67) on Ni foam (denoted as CoO@N-C/NF). Each CoO@N-C nanowire was built up of numerous ordered in-situ nitrogen-doped carbon coated CoO nanoparticles (around 20 nm) after annealing treatment. Benefited from the unique structural features, when served as anode for lithium ion batteries, the CoO@N-C/NF exhibit superior initial Coulombic efficiency of 78.04%, and excellent electrochemical cyclability (1884.1 mAh g −1 at 1 A g −1 after 100 cycles) and good rate capability (1169.2 mAh g −1 at the rate of 5000 mA g −1 ). To our knowledge, this is the highest capacity with similar electric current density that has been reported for CoO-based materials. Our results indicate that the CoO@N-C/NF electrode without any auxiliary materials are expected to open up new opportunities for CoO-based material to power electronic devices.

Photoelectrochemical technology for solar fuel generation, from single photoelectrodes to unassisted cells: a review

“…With chemical doping, the concentration of electrons or holes can be raised and the conductivity can be improved (Zhang et al 2019). New energy levels from impurities could alter the electronic distribution and facilitate the charge separation and transfer (Wang et al 2019a). Especially, an N-doped carbon dot modified WO 3 nanoflake (NCDs/WO 3 ) is constructed for water splitting (Kong et al 2019).…”

Templated interfacial synthesis of metal-organic framework (MOF) nano- and micro-structures with precisely controlled shapes and sizes

“…For instance, 1-D ZIF nanowires or nanorods can be synthesized through top-down approaches including electrospinning 46 – 48 and electric field-induced self-assembly of ZIF crystals 49 , and bottom-up, solution-based synthesis with the aid of surfactants 50 and by controlling the concentrations of seeding solutions 51 . There have also been reports on fabricating ZIF nanorods by using more accessible 1-D structures as templates, such as zinc oxide 52 , 53 , cobalt oxide 54 , cobalt carbonate hydroxide 55 , tellurium 56 , carbon nanotubes 57 , and organic polymers 58 . Most recently, our group reported the preparation of 1-D ZIF-8 nanowires and nanorods, with respective diameters of 30 and 100 nm, through interfacial synthesis templated by commercial track-etched polycarbonate (PCTE) membranes 59 .…”

Synergistic regulation of Li deposition on F-doped hollow carbon spheres toward dendrite-free lithium metal anodes

“…The pyridinic-N and pyrrolic-N enable porous carbon lithiophilicity, decreasing the nucleation barrier and directing Li homogeneous deposition. [34][35][36][37][38] Li||Cu@FHC and Li||Cu cells were assembled to evaluate the Li nucleation overpotential and coulombic efficiency (CE). The nucleation overpotential was used to define the Li nucleation difficulty on the current collector, and the bottom and the subsequent plateau represented the Li nucleation voltage and the nuclei growth voltage, respectively.…”