Lithiophilic Co/Co₄N nanoparticles embedded in hollow N-doped carbon nanocubes stabilizing lithium metal anodes for Li–air batteries

Abstract

A lithiophilic Co/Co4N-N-doped carbon electrode displays a high coulombic efficiency (98.5%) and dendrite-free morphology for long-life Li–air batteries.

A Porous Nano-Micro-Composite as a High-Performance Bi-Functional Air Electrode with Remarkable Stability for Rechargeable Zinc–Air Batteries

“…2 b). Obviously, the distinct maxima at 2 θ of ~ 44°, 52° and 75.8° correspond well to the Co (111), Co (200), and Co 4 N (220) reflections [ 23 – 25 ], demonstrating the effective transformation of ZIF-67 to metallic Co and Co 4 N after the pyrolysis in nitrogen atmosphere at 750 °C. Furthermore, BCZ2 also replicated the similar trend as those of C-ZIF.…”

“…2 d). The binding energies in Co 2p corresponding to 778.2 and 793.1 eV are assigned to metallic Co (Co 0 ), which contributes to ORR activity, whereas the peak at ~ 781.0 eV is attributed to Co 4 N [ 23 , 25 , 29 ]. On the other hand, the binding energy of 779.7–781.5 eV is attributed to CoO (2 p 3/2 ) and Co 3 O 4 (2 p 3/2 ) [ 30 ], while the peak at 795.90 eV is ascribed to CoO (2 p 1/2 ) and Co 3 O 4 (2 p 1/2 ).…”

Creating Competitive Active Sites on CNTs Walls by N‐Doping and Sublayer Co4N Encapsulating for Efficient Hydrogen Evolution Reaction

“…Raman spectroscopy was performed for further characterization. The Raman spectra of N−CNTs@Co 4 N@NF and N−CNTs display the D band (∼1361 cm −1 ), G band (∼1583 cm −1 ), 2D band (∼2690 cm −1 ) and D+G band (∼2955 cm −1 ) (Figure a) . The I D /I G ratio of N−CNTs@Co 4 N@NF (1.01) is higher than that of N−CNTs (0.74), which indicates the more ample defects/disorders in the carbon structure possibly owning to the incorporation of N atoms .…”

Recent Progress on Zeolitic Imidazolate Frameworks and Their Derivatives in Alkali Metal–Chalcogen Batteries

“…Other metal compounds, such as metal oxides [ 59,221–224 ] and metal nitrides, [ 225 ] can also be prepared and utilized in Li metal anodes. Zhang et al.…”

“…Moreover, lithiophilic Co/Co 4 N nanoparticles embedded in the hollow N‐doped carbon nanocubes stabilized the Li metal anodes. [ 225 ] Owing to the presence of lithiophilic Co 4 N, pyridinic and pyrrolic N species in the Co/Co 4 N/carbon skeleton, this structure ensured the uniform nucleation and deposition of Li metal. More impressively, it was verified that a stable solid electrolyte interphase layer was formed on the Co/Co 4 N/carbon skeleton.…”