The highly dispersed Co-based nanoparticles encapsulated into porous N-doping carbon polyhedral with the low content of Ru modification as a promising cathode catalyst for long-life Li-O_(2)batteries
作者机构：Key Laboratory of Eco-chemical EngineeringTaishan Scholar Advantage and Characteristic Discipline Team of Eco-chemical Process and TechnologyCollege of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Chemistry and Molecular EngineeringQingdao University of Science and TechnologyQingdao 266042China College of Environment and Safety EngineeringQingdao University of Science and TechnologyQingdao 266042China Key Laboratory of Eco-chemical EngineeringTaishan Scholar Advantage and Characteristic Discipline Team of Eco-chemical Process and TechnologyCollege of Chemical EngineeringQingdao University of Science and TechnologyQingdao 266042China
出 版 物：《Nano Research》 (纳米研究（英文版）)
年 卷 期：2022年第15卷第4期
页 面：3204-3212页
核心收录：
学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学]
基 金：The authors acknowledge funding support from the National Natural Science Foundation of China(Nos.21905151 and 51772162) Youth Innovation and Technology Foundation of Shandong Higher Education Institutions,China(No.2019KJC004) Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14) Taishan Scholar Young Talent Program,Major Scientific and Technological Innovation Project(No.2019JZZY020405) the Postdoctoral Science Foundation of China(No.2019M652499)
主 题：zeolitic imidazole frameworks Zn volatilization high dispersed Co-based particles Ru modification rechargeable Li-O_(2)batteries
摘 要：Lithium(Li)-O_(2)batteries have triggered worldwide interest due to their ultrahigh theoretical energy ***,it is a long shot for the grand-scale applications of Li-O_(2)battery at current stage owing to its significant polarization,inferior cycling life,and irreversible decomposition of Li2O_(2).Herein,a facile way of preparing the highly dispersed Co-based nanoparticles encapsulated into porous N-doping carbon polyhedral with the low content of Ru modification(LRu@HDCo-NC)is explored through the pyrolysis of Co/Zn based zeolitic imidazole frameworks(ZIFs)containing Ru-based *** with the very small amount of Ru introduction(1.8%),LRu@HDCo-NC still exhibits the superior oxygen evolution reaction/oxygen reduction reaction(OER/ORR)performance and also inhibits side reactions in Li-O_(2)battery because of the abundant pores,plentiful surface N heteroatoms,and highly dispersed metal-based sites which are induced by the volatilization of Zn,and conductive/stable carbon skeleton derived from *** applied in Li-O_(2)batteries,LRu@HDCo-NC cathode delivers a high discharge capacity of 15,973 mAh·g^(-1)at 200 mA·g^(-1),good capacity retention at higher rate(12,362 mAh·g^(-1)at 500 mA·g^(-1))and outstanding stability for300 cycles with low voltage polarization of2.3 V under a cut-off capacity of 1,000 mAh·g^(-1)at 500 mA·g^(-1).More critically,a series of ex situ and in situ characterization technologies disclose that the LRu@HDCo-NC cathodes can effectively promote the reversible reactions in Li-O_(2)batteries.
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