首页|N/S-Doped Hierarchical Porous Bamboo Carbon Fibers with Ultra-Large Surface Area and Highly Exposed Active Sites for Flexible Zinc-Air Battery

N/S-Doped Hierarchical Porous Bamboo Carbon Fibers with Ultra-Large Surface Area and Highly Exposed Active Sites for Flexible Zinc-Air Battery

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Facile mass transport channel and accessible active sites are crucial for binder-free air electrode catalysts in rechargeable flexible zinc-air battery(ZAB).Herein,a ZnS/NH3 dual-assisted pyrolysis strategy is proposed to prepare N/S-doped hierarchical porous bam-boo carbon cloth(HP-NS-BCC)as binder-free air electrode catalyst for ZAB.BCC fabric with abundant micropores is firstly used as flexible carbon support to facilitate the heteroatom-doping and construct the hierarchical porous structure.ZnS nanospheres and NH3 activization together facilitate the electronic modulation of carbon matrix by N/S-doping and optimize the macro/meso/micropores structure of carbon fibers.Benefiting from the highly-exposed N/S-induced sites with enhanced intrinsic activity,the optimized mass transport of biocarbon fibers,as well as the ultra-large specific surface area of 2436.1 m2·g-1,the resultant HP-NS-BCC catalyst exhib-its improved kinetics for oxygen reduction/evolution reaction.When applied to rechargeable aqueous ZABs,it achieves a significant peak power density of 249.1 mW·cm-2.As binder-free air electrode catalyst,the flexible ZAB also displays stable cycling over 500 cy-cles with a minimal voltage gap of 0.42 V,showcasing promising applications in flexible electronic devices.

Hierarchical porous structureBamboo carbon fibersN/S-doped catalystFlexible Zn-air batteriesOxygen reduction reactionOxygen evolution reactionElectrocatalysisCatalytic activity

Yuhang Qian、Xinye Liu、Xiangjun Zheng、Zilong Yang、Yanjie Yu、Fei Gao、Xingmei Guo、Yuanjun Liu、Xuecheng Cao、Ruihua Guo、Junhao Zhang

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School of Environmental and Chemical Engineering,Jiangsu University of Science and Technology,Zhenjiang,Jiangsu 212003,China

Automotive Engineering Research Institute,Jiangsu University,301 Xuefu Road,Zhenjiang,Jiangsu 212013,China

College of Food Science and Technology,Shanghai Ocean University,Shanghai 201306,China

Marine Biomedical Science and Technology Innovation Platform of Lin-gang Special Area,Shanghai 201306,China

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2024

10.1002/cjoc.202400479

中国化学(英文版)
中国化学会 上海有机化学研究所

中国化学(英文版)

CSTPCD
影响因子：0.848
ISSN：1001-604X
年,卷(期)：2024.42(21)