Affiliation:
1. College of Polymer Science and Engineering State Key Laboratory of Polymer Materials Engineering Sichuan University Chengdu 610065 China
Abstract
AbstractMetallophthalocyanines (MPcs) hold great promise in the electrochemical reduction of oxygen; however, their practical applications in energy storage and conversion are still limited by their low stability and poor water oxidation activity. Herein, a novel stable 2D imide‐linked metalphthalocyanine framework (denoted as FePc‐PI) is reported, that has atomically dispersed Fe‐N4 sites deposited on the KB substrate via in situ growth, followed by incorporation of ultrafine nickel oxide nanoparticles (NiOx@FePc‐PI/KB) to induce bifunctional electrocatalytic activities for the oxygen reduction reaction and oxygen evolution reaction. Benefitting from the robust aromatic backbone, the engineered catalytic centers, and the unique electronic structures owing to the interaction between the Fe‐N4 sites and NiOx species, the newly developed NiOx@FePc‐PI/KB catalyst exhibits excellent reversible oxygen bifunctional activity (E1/2 = 0.926 V, η10 = 285 mV), delivering a record‐low overpotential difference (ΔE) of 0.59 V, which far exceeds the noble‐metal‐based Pt/C+RuO2 benchmark (ΔE = 0.77 V) and represents the highest level for reported bifunctional electrocatalysts. Furthermore, the rechargeable aqueous Zn‐air batteries assembled with the NiOx@FePc‐PI/KB catalyst deliver a high peak power density of 232.9 mW cm−2 and long‐term cycling durability over 1400 cycles. Flexible all‐solid‐state Zn‐air batteries exhibit stable cycling at various flat/bent/flat states, thus demonstrating their excellent prospects in realistic implementations.
Funder
National Natural Science Foundation of China
Subject
General Materials Science,Renewable Energy, Sustainability and the Environment
Cited by
7 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献