Engineering Metal Alloy Nanocrystals Anchored on N‐Doped Nanoporous Carbon for Li‐O₂ Batteries

Abstract

The development of highly efficient oxygen catalysts is crucial for improving the storage capacity and stability of Li‐O2 batteries. Herein, we report a simple engineering method to prepare the composite electrocatalyst of the CoNi alloy nanoparticles anchored on the N‐doped porous carbon substrate (CoNi/NC), which exhibits the enhanced electrocatalytic performance for the Li‐O2 batteries due to the synergetic effect between the bimetal CoNi alloy and the N‐doped porous carbon framework. The porous structure can expose more active sites, enhance the mass transfer, and temporarily store the Li2O2 intermediate. The CoNi/NC catalyst makes the batteries show a high discharge capacity of 17783 mA h g−1, a low overvoltage of 1.03 V, and long cycle life of 194 cycles. These results indicate that such a simple engineering preparation method can benefit the large‐scale production of high‐efficiency and cost‐effective electrocatalysts for energy applications.

Brush-like Co/CoSe nanoheterostructures embedded in N-doped carbon for rechargeable Zn–air batteries

“…8,9 Recently, transition metal-containing composite materials have attracted intense attention as viable alternatives to precious metal-based catalysts, primarily due to their low cost and high abundance. [10][11][12][13][14][15][16] Specifically, cobalt-based materials have garnered substantial attention as substitutes for precious metal-based catalysts owing to their inherent high activity. [17][18][19] It is anticipated that the various oxidation states and finely adjustable electronic structures of cobalt-based materials, such as Co 3 O 4 , CoS 2 , and similar compounds, exert influence on charge transfer and mass transport during electrochemical processes.…”