Synthesis of faveolate open-structured Ru-N/C cathode catalyst with high bifunctional activity for rechargeable quasi-solid-state Li-O_(2)batteries  

作　　者：Tie Liu 

机构地区：[1]School of Chemistry and Chemical Engineering,Heze University,Heze 274015,China

出　　处：《Nano Research》2025年第1期351-361,共11页纳米研究（英文版）

基　　金：supported by the grants from the Natural Science Foundation Committee of Shandong Province(No.ZR2021QB143);Doctoral Fund of Heze University(No.XY20BS20),China.

摘　　要：The constituents and geometric design of cathodic electrocatalyst to achieve high activity and durability are effective but challenging for the development of high-performance Li-O_(2)batteries.This study employs a mild solution precipitation method followed by thermolysis to construct a faveolate open-structured Ru-N/C matrix with a loosely braided network morphology as a bifunctional cathode.The details prove that this hybrid structure is composed of ultrafine Ru globular nanoparticles(ca.2 nm)coated with an N-enriched carbon film and exhibits a valuable beehive through-hole character for rapid mass transport during oxygen redox catalysis.The synergistic effect of open-structured and reticular network matrix with metal-N4 coordination induces asymmetric charge distributions with moderate adsorption/desorption behaviour with oxygen intermediates.Consequently,this particular Ru-N/C matrix cathode provides a promising Li_(2)O_(2)accommodation space and exhibits superior electrochemical performance in terms of a positive discharge plateau and low charge overpotential.Besides,the assembled batteries also present a high discharge capacity and a long cycle life(exceeding 283 cycles).The density functional theory(DFT)calculations also corroborate the assertion that the Ru-N/C catalyst exhibits robust electronic coupling transfer and superior bifunctional activity.As such,our work demonstrates that this type of open-structured Ru-N/C matrix is promising for fabricating high-performance quasi solid-state Li-O_(2)batteries.

关 键 词：ruthenium nitride nitrogen-doped carbon ELECTROCATALYST Li-O_(2)battery 

分 类 号：TM912[电气工程—电力电子与电力传动]