Hierarchical N-Doped Porous Carbons for Zn–Air Batteries and Supercapacitors

查看全文 作　　者：Beibei [1,3]Guo;Ruguang [1]Ma;Zichuang [1]Li;Shaokui [1]Guo;Jun [3]Luo;Minghui [2,4]Yang;Qian [1,2]Liu;Tiju [5]Thomas;Jiacheng [1,2]Wang

机构地区：[1]State Key Laboratory of High Performance Ceramics and Superfine Microstructure,Shanghai Institute of Ceramics,Chinese Academy of Sciences,Shanghai 200050,People’s Republic of China;[2]Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049,People’s Republic of China;[3]School of Materials Science and Engineering,Shanghai University,Shanghai 200444,People’s Republic of China;[4]Solid State Functional Materials Research Laboratory,Ningbo Institute of Materials Technology and Engineering,Chinese Academy of Sciences,Ningbo 315201,People’s Republic of China;[5]Department of Metallurgical and Materials Engineering,Indian Institute of Technology Madras,Adyar,Chennai,Tamil Nadu 600036,India

出　　处：《Nano-Micro Letters》索引2020年第12卷第2期,共13页

基　　金：financial support from NSFC(51602332);the National Key Research and Development Program of China(2016YFB0700204);Science and Technology Commission of Shanghai Municipality(15520720400,16DZ2260603);Equipment Research Program(6140721050215);the National 1000 Youth Talents program of China;financial support from Ningbo 3315 program;DST Solar Energy Harnessing Centre(DST/TMD/SERI/HUB/1(C)),DST Materials for Energy Storage program,Ministry of Electronics and Information Technology(India)(Project ID:ELE1819353MEITNAK) 摘　　要：Nitrogen-doped carbon materials with a large specific surface area,high conductivity,and adjustable microstructures have many prospects for energy-related applications.This is especially true for N-doped nanocarbons used in the electrocatalytic oxygen reduction reaction(ORR)and supercapacitors.Here,we report a low-cost,environmentally friendly,large-scale mechanochemical method of preparing N-doped porous carbons(NPCs)with hierarchical micro-mesopores and a large surface area via ball-milling polymerization followed by pyrolysis.The optimized NPC prepared at 1000°C(NPC-1000)offers excellent ORR activity with an onset potential(Eonset)and half-wave potential(E1/2)of 0.9 and 0.82 V,respectively(vs.a reversible hydrogen electrode),which are only approximately 30 mV lower than that of Pt/C.The rechargeable Zn–air battery assembled using NPC-1000 and the NiFe-layered double hydroxide as bifunctional ORR and oxygen evolution reaction electrodes offered superior cycling stability and comparable discharge performance to RuO2 and Pt/C.Moreover,the supercapacitor electrode equipped with NPC prepared at 800℃ exhibited a high specific capacity(431 F g^−1 at 10 mV s^−1),outstanding rate,performance,and excellent cycling stability in an aqueous 6-M KOH solution.This work demonstrates the potential of the mechanochemical preparation method of porous carbons,which are important for energy conversion and storage. 关键词：Porous carbon Ball milling Nitrogen doping Oxygen reduction reaction Zn-air battery SUPERCAPACITOR

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Hierarchical N-Doped Porous Carbons for Zn–Air Batteries and Supercapacitors

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