Hierarchical mesoporous S,N-codoped carbon nanostructures composed of Co/Co-Cu-S/carbon nanoplate arrays on carbon nanofibers as a self-supported air cathode for long-lasting rechargeable Zn-air batteries

作     者：XU ZhuYing YAN Lei SHEN JunLing YANG XiaoJing NING JiQiang ZHONG YiJun HU Yong XU ZhuYing;YAN Lei;SHEN JunLing;YANG XiaoJing;NING JiQiang;ZHONG YiJun;HU Yong

作者机构：Key Laboratory of the Ministry of Education for Advanced Catalysis MaterialsDepartment of ChemistryZhejiang Normal UniversityJinhua 321004China Department of Optical Science and EngineeringFudan UniversityShanghai 200438China Hangzhou Institute of Advanced StudiesZhejiang Normal UniversityHangzhou 311231China 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2022年第65卷第3期

页      面：693-703页

核心收录：

学科分类：0808[工学-电气工程] 07[理学] 070205[理学-凝聚态物理] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0703[理学-化学] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the Major Program of Zhejiang Provincial Natural Science Foundation of China(Grant No.LD22B030002) Zhejiang Provincial Ten Thousand Talent Program the Independent Designing Scientific Research Project of Zhejiang Normal University(Grant No.2020ZS03)。 

主　　题：Co Co-Cu-S carbon bifunctional electrocatalyst rechargeable Zn-air batteries 

摘      要：One of the primary roadblocks to widespread applications of rechargeable Zn-air batteries is the durability issue with oxygen reduction and evolution processes(ORR/OER)bifunctional electrocatalysts.We herein report the construction of a selfsupported air cathode for Zn-air batteries made of S,N-codoped porous complex carbon nanostructures of Co/Co-Cu-S/carbon nanoplate arrays and carbon nanofibers(denoted as Co/Co-Cu-S@SNPCP-CFs).The hierarchical heteroatom-doped mesoporous carbon nanohybrids with multiple active species not only provide a high surface-to-volume ratio,exposing more catalytic sites and accelerating the charge and mass transfer,but also boost the activity and durability.The Co/Co-Cu-S@SNPCP-CFs catalyst reveals a small potential gap(ΔE=0.67 V)between the half-wave potential of ORR and OER potential at 10 m A ccm^(-2),demonstrating outstanding bifunctional performance.Furthermore,the rechargeable Zn-air battery made with the as-obtained electrocatalyst exhibits a high-power density of 220 m W cm^(-2)and a long cycling time of over 800 h at 10 m A ccm^(-2),and the flexible solid-state rechargeable Zn-air battery based on Co/Co-Cu-S@SNPCP-CFs self-supporting air cathode also displays a long duration time of over 60 h.