Schiff-base polymer derived FeCo-N-doped porous carbon flowers as bifunctional oxygen electrocatalyst for long-life rechargeable zinc-air batteries  

作　　者：Yusong Deng Jiahui Zheng Bei Liu Huaming Li Mei Yang Zhiyu Wang 

机构地区：[1]College of Chemistry,Xiangtan University,Xiangtan 411105,Hunan,China [2]Key Lab of Environment-Friendly Chemistry and Application in Ministry of Education,Key Laboratory of Polymeric Materials&Application Technology of Hunan Province,Key Laboratory of Advanced Functional Polymeric Materials of College of Hunan Province,Xiangtan University,Xiangtan 411105,Hunan,China [3]State Key Lab of Fine Chemicals,Liaoning Key Lab for Energy Materials and Chemical Engineering,PSU-DUT Joint Center for Energy Research,School of Chemical Engineering Dalian University of Technology,Dalian 116024,Liaoning,China

出　　处：《Journal of Energy Chemistry》2023年第1期470-478,I0012,共10页能源化学（英文版）

基　　金：supported by the National Science Foundation of China(21805235);the Opening Foundation of Creative Platform of the Key Laboratory of the Education Department of Hunan Province(20K131);the Construct Program of the Key Discipline in Hunan Province。

摘　　要：Rational design and exploration of low-cost and robust bifunctional oxygen electrocatalysts are vitally important for developing high-performance zinc-air batteries(ZABs).Herein,we reported a facile yet cost-efficient approach to construct a bifunctional oxygen reduction reaction(ORR)/oxygen evolution reaction(OER)electrocatalyst composed of N-doped porous carbon nanosheet flowers decorated with Fe Co nanoparticles(Fe Co/N-CF).Rational design of this catalyst is achieved by designing Schiff-base polymer with unique molecular structure via hydrogen bonding of cyanuramide and terephthalaldehyde polycondensate in the presence of metal cations.It exhibits excellent activity and stability for electrocatalysis of ORR/OER,enabling ZAB with a high peak power density of 172 m W cm^(-2)and a large specific capacity of 811 m A h g^(-1)Znat large current.The rechargeable ZAB demonstrates excellent durability for 1000 h with slight voltage decay,far outperforming a couple of precious Pt/Ir-based catalysts.Density functional theory(DFT)calculations reveal that high activity of bimetallic Fe Co stems from enhanced O_(2)and OH-adsorption and accelerated O_(2)dissociation by OAO bond activation.

关 键 词：Rechargeable zinc-air batteries Oxygen electrocatalyst Schiff-base polymer Bimetallic FeCo N-doped porous carbon 

分 类 号：O643.36[理学—物理化学] TM911.41[理学—化学]