文献类型：期刊文献

英文题名：Ultrathin amorphous MnO₂ modified prawn shells-derived porous carbon towards robust oxygen electrocatalyst for rechargeable Zn-air battery

作者：Xiao, Xiao[1,2];Zhang, Wenzhi[3];Zhao, Hui[1,2];Li, Linfeng[1];Deng, Peichang[1];Wu, Yulian[1];Luo, Shuliang[4];Chen, Beibei[5]

机构：[1]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Key Lab Climate Resources & Environm Continental, Dept Educ Guangdong Prov, Zhanjiang 524088, Guangdong, Peoples R China;[3]Guangdong Polytech Environm Protect Engn, Foshan 528216, Peoples R China;[4]Xian Univ Sci & Technol, Sch Mat Sci & Engn, Xian 710054, Peoples R China;[5]Guangdong Ocean Univ, Coll Coastal Agr Sci, Zhanjiang 524088, Peoples R China

年份：2022

卷号：48

期号：5

起止页码：6506

外文期刊名：CERAMICS INTERNATIONAL

收录：SCI-EXPANDED(收录号：WOS:000752967200004)、、EI(收录号：20215011321046)、Scopus(收录号：2-s2.0-85120903255)、WOS

基金：This work was financially supported by the National Nature Science Foundation of China (31901330) , the Innovative Youth Talents of Guangdong Education Department Support Program (2021KQNCX027) , the Youth Innovative Talents Project of Zhanjiang (2021E05016) and the Research Foundation for Advanced Talents of Guangdong Ocean University (060302122010) .

语种：英文

外文关键词：Zn-air battery; Oxygen electrocatalyst; Shrimp shells-derived porous carbon; Amorphous MnO2

外文摘要：Precious metal-free bifunctional electmcatalysts with efficient performance to ORR (oxygen reduction reaction) and OER (oxygen evolution reaction) are the prerequisite to the commercialization of rechargeable Zn-air battery (RZAB). Here, ultrathin amorphous MnO2 modified prawn shells-derived porous carbon (U-MnO2/PSNC) is designed and synthesized via a self-template assisted pyrolysis coupling in-situ redox reaction strategy. In this composite, the ultrathin amorphous MnO2 provides high surface defects and homogeneous catalytic active sites. The conductive prawn shells-derived porous carbon displays macro-meso-microporous structure, promoting electric conductivity and offering fast pathway for mass diffusion. With optimized composition, the U-MnO2-0.01/PSNC delivers an excellent bifunctional to ORR/OER with a small Delta E (bifunctional activity parameter) value of 0.776 V. Moreover, the RZAB equipped with U-MnO2-0.01/PSNC displays a considerable stability with narrow decay of battery efficiency (1.10%) for similar to 334 h (500 cycles) at 10 mA cm(-2). This work enlightens a new pathway to design cost-effective bifunctional electrocatalysts for metal-air battery.