Coupling Co_(2)P nanoparticles onto N,P-doped biomass-derived carbon as efficient electrocatalysts for flexible Zn-air batteries  

作　　者：Shu-Qi Li Kang Sun Yan-Yan Liu Shu-Ling Liu Jing-Jing Zhou Wen-Bo Zhang Yi-Hang Lu Xiang-Meng Chen Xiao-Peng Wang Bao-Jun Li Jian-Chun Jiang 

机构地区：[1]College of Science,Henan Agricultural University,Zhengzhou 450002,China [2]Department of Chemistry,Tsinghua University,Beijing 100084,China [3]College of Chemistry,Zhengzhou University,Zhengzhou 450001,China [4]Institute of Chemical Industry of Forest Products,National Engineering Lab for Biomass Chemical Utilization,Key and Open Lab on Forest Chemical Engineering,Chinese Academy of Forestry,State Forestry Administration,Nanjing 210042,China

出　　处：《Rare Metals》2024年第10期4982-4991,共10页稀有金属（英文版）

基　　金：financially supported by Jiangsu Province Key Laboratory of Biomass Energy and Materials(No.JSBEM-S-202101);the Young Top Talent Program of Zhongyuan-Yingcai-Jihua(No.30602674);the Top-Notch Talent Program of Henan Agricultural University(No.30501034);the National Natural Science Foundation of China(Nos.31901272 and No.22279118)。

摘　　要：Catalysts for oxygen conversion play an important role in energy storage and conversion technologies such as metal-air batteries.Developing highly active stable,and low-cost catalysts is critical for further implementation of the above technologies.Herein,an efficien oxygen electrocatalyst with Co_(2)P nanoparticles(NPs)coupling onto N,P-doped porous carbon nanosheets(Co_(2)P@NPAC)derived from cotton stalk is successfully designed and prepared via activation,hydrothermal treatment,and pyrolysis procedure.The excellent properties of electrical conductivity,mass transfer,and synergistic integration between Co_(2)P and N,P-doped carbon endow Co_(2)P@NPAC composite with superior oxygen reduction reaction/oxygen evolution reaction(ORR/OER)performance.Co_(2)P@NPAC catalyst achieves ORR activity with half-wave potential of 0.85 V and high OER activity with overpotential of 261 mV at 10 mA·cm^(-2).The flexible Zn-air batteries(ZABs)based on Co_(2)P@NPAC catalyst revea outstanding performances with a high open-circuit voltage(1.38 V),a peak power density of(75 mW·cm^(-2)),and a low charge-discharge voltage gap(0.74 V,~200 cycles)The flexible ZABs express the stable discharge-charge voltage gap at various bending states.This work provides interesting inspiration for the ingenious design of efficien carbon electrocatalysts from biomass with potential application of energy storage and conversion devices.

关 键 词：Cotton stalk N P-doped activated carbon Oxygen reduction reaction Flexible Zn-air batteries 

分 类 号：TB383.1[一般工业技术—材料科学与工程] TM911.41[电气工程—电力电子与电力传动]