WC/Co_(7)Fe_(3)heterojunction embedded in N,P co-doped hierarchical carbon enables rechargeable/flexible Zn-air battery  

作　　者：Huimin Mao Xiaobin Liu Siqi Wu Yixin Fu Guishan Liu Guizhong Zhou Lei Wang 

机构地区：[1]Key Laboratory of Eco-chemical Engineering,International Science and Technology Cooperation Base of Eco-chemical Engineering and Green Manufacturing,Qingdao University of Science and Technology,Qingdao 266042,China [2]College of Environment and Safety Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [3]College of Chemistry and Molecular Engineering,Qingdao University of Science and Technology,Qingdao 266042,China [4]Chaofeng Steel Structure Group Co.,Ltd.,Hangzhou 311215,China

出　　处：《Nano Research》2023年第2期2519-2527,共9页纳米研究（英文版）

基　　金：the National Natural Science Foundation of China(Nos.51772162 and 52072197);China Postdoctoral Science Foundation(No.2020M682135);Postdoctoral Applied Research Project of Qingdao,Postdoctoral Innovation Project of Shandong Province(No.202102039);Outstanding Youth Foundation of Shandong Province,China(No.ZR2019JQ14);Youth Innovation and Technology Foundation of Shandong Higher Education Institutions,China(No.2019KJC004);the Natural Science Foundation of Shandong Province(No.ZR2021MB085);Major Scientific and Technological Innovation Project(No.2019JZZY020405);Major Basic Research Program of Natural Science Foundation of Shandong Province under Grant(No.ZR2020ZD09);Taishan Scholar Young Talent Program(No.tsqn201909114).

摘　　要：Rational design and synthesis of bifunctional oxygen electrocatalysts with high activity and stability are key challenges in the development of rechargeable Zn-air batteries(ZABs).In this paper,tungsten carbide(WC)and Co_(7)Fe_(3)embedded in N,P co-doped hierarchical carbon(WC/Co_(7)Fe_(3)-NPHC)was prepared by using zeolite imidazolate frameworks as precursor.Density functional theory demonstrates that the mutual adjustment among the WC,Co_(7)Fe_(3),and N,P co-doped carbon at the three-phase heterojunction interface makes the catalyst possess moderate adsorption strength,and greatly improves the conductivity and electron transfer rate of the catalyst.As a result,the WC/Co_(7)Fe_(3)-NPHC exhibits a low overall oxygen redox potential difference of 0.72 V,while the ZAB assembled by WC/Co_(7)Fe_(3)-NPHC as an air cathode exhibits ultra-long cycle stability of over 550 h.Futhermore,WC/Co_(7)Fe_(3)-NPHC can keep good charge and discharge stability at different bending angles when applied to flexible solid ZAB.

关 键 词：HETEROJUNCTION hierarchical structure bifunctional oxygen electrocatalyst Zn-air battery 

分 类 号：O64[理学—物理化学]