One step, In-situ phosphating construction of encapsulated Co2P and Co3(PO4)2 nanoparticles within 3D reticulated carbon for rechargeable Zn-Air batteries
Listed in
This article is not in any list yet, why not save it to one of your lists.Abstract
As potential candidates to be employed as air anodes in metal-air batteries, transition metal phosphides (TMPs) have received considerable attention due to its excellent electrocatalytic activity. This work presents a straightforward method for efficiently fabricating CoPO-Co 2 P@NPC, a three-dimensional (3D) reticulated carbon N, P-doped carbon structure generated from polyaniline-phytic acid polymer, with Co 2 P and Co 3 (PO 4 ) 2 nanoparticles implanted on the carbon matrix. The CoPO-Co 2 P@NPC demonstrates impressive bifunctional oxygen reduction reactions (ORR)/oxygen evolution reactions (OER) performances. A diffusion-limiting current density of 6.56 mA cm − 2 , a half-wave potential of 0.80 V, and an overpotential of 1.73 V are detected at 10 mA cm − 2 . The rechargeable ZAB that has been assembled demonstrates a high-power density of 265 mW cm − 2 , with excellent cycling stability over 450 hours. The composite based on Co 2 P-Co 3 (PO 4 ) 2 demonstrates outstanding bifunctional electrocatalytic performance, which makes it a desirable anode material for rechargeable Zn-Air batteries.
