Chemically embedding Co nanospheres in N-doped carbon nanosheets for enhanced zinc-air batteries

l-Alanine-Assisted Synthesis of a Hierarchically Porous Co@N–C/N-Ketjenblack Carbon Catalyst for Oxygen Reduction in Zn–Air Batteries

“…The high open-circuit voltage and power density of the Co@N–C/N–KB-built cell surpassed most recently reported cobalt-based catalysts (Table S1). ,,,,,− These results illustrated that Co@N–C/N–KB offered excellent performance in primary ZABs. Figure d shows that the Co@N–C/N–KB-built ZAB delivered a much higher specific capacity (790 mA h gZn –1 ) at a discharge current density of 5 mA cm –2 compared to the Pt/C-built cell (474 mA h gZn –1 ).…”

“…The ORR performance of Co@N–C/N–KB is among the best of recently reported cobalt-based catalysts (Table S1). ,,,,,− Koutecky–Levich (K–L) plots for ORR on Co@N–C/N–KB, extracted from LSV curves collected at rotation speeds ranging from 400 to 2500 rpm, are shown in Figure d. Apparently, the kinetic current density displayed a proportional increment upon elevating the rotation rate with accompaniment of a distinct diffusion-limited current density platform.…”

Structural and compositional analysis of MOF-derived carbon nanomaterials for the oxygen reduction reaction

“…Recently, carbon nanomaterials have garnered significant attention due to their tunable structure, controllable specific surface area, ease of doping and affordability. [7][8][9] Among these materials, graphene, carbon nanotubes (CNT), and mesoporous carbon have been considered promising alternatives to precious metals for ORR catalysts due to their high electrical conductivity and abundance of active sites. Pyrolysis of carbon-containing precursors is a common method for synthesizing carbon nanomaterials, and the choice of precursor material has a crucial impact on the properties of the final product.…”

N,S co-doped porous carbon with Co9S8 prepared with a Co-FF-derived Co3O4 template: a bi-functional electrocatalyst for rechargeable zinc–air batteries

“…The electrocatalytic stability is one of the key parameters for evaluating catalyst performance. 49,50 The OER electrocatalytic stability of Co 9 S 8 /NSC-1 was evaluated by the i-t test. As shown in Fig.…”