An in-situ self-etching enabled high-power electrode for aqueous zinc-ion batteries

作     者：Shuang Hou Dingtao Ma Yanyi Wang Kefeng Ouyang Sicheng Shen Hongwei Mi Lingzhi Zhao Peixin Zhang Shuang Hou;Dingtao Ma;Yanyi Wang;Kefeng Ouyang;Sicheng Shen;Hongwei Mi;Lingzhi Zhao;Peixin Zhang

作者机构：College of Chemistry and Environmental EngineeringShenzhen UniversityShenzhen 518060GuangdongChina Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy MaterialsSchool of Semiconductor Science and TechnologySouth China Normal UniversityFoshan 528225GuangdongChina SCNU Qingyuan Institute of Science and Technology Innovation Co.Ltd.Qingyuan 511517GuangdongChina 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2024年第88卷第1期

页      面：399-408,I0009页

核心收录：

学科分类：0808[工学-电气工程] 08[工学] 080501[工学-材料物理与化学] 0805[工学-材料科学与工程（可授工学、理学学位）] 

基　　金：financially supported by the Shenzhen Science and Technology Program (JCYJ20200109105805902,JCYJ20220818095805012) the National Natural Science Foundation of China (22208221,22178221,42377487) the Scientific and Technological Plan of Guangdong Province (2019B090905005,2019B090911004) the Natural Science Foundation of Guangdong Province (2021A1515110751) the Guangdong Basic and Applied Basic Research Foundation (2022A1515110477,2021B1515120004) 

主　　题：In-situ self-etching Free-standing electrode Pseudocapacitive storage High-power Zinc-ion batteries 

摘      要：Sluggish storage kinetics is considered as the main bottleneck of cathode materials for fast-charging aqueous zinc-ion batteries(AZIBs).In this report,we propose a novel in-situ self-etching strategy to unlock the Palm tree-like vanadium oxide/carbon nanofiber membrane(P-VO/C)as a robust freestanding *** investigations including the finite element simulation,in-situ X-ray diffraction,and in-situ electrochemical impedance spectroscopy disclosed it an electrochemically induced phase transformation mechanism from VO to layered Zn_(x)V_(2)O_5·nH_(2)O,as well as superior storage kinetics with ultrahigh pseudocapacitive *** demonstrated,such electrode can remain a specific capacity of 285 mA h g^(-1)after 100 cycles at 1 A g^(-1),144.4 mA h g^(-1)after 1500 cycles at 30 A g^(-1),and even 97 mA h g^(-1)after 3000 cycles at 60 A g^(-1),***,an impressive power density of 78.9 kW kg^(-1)at the super-high current density of 100 A g^(-1)also can be *** design concept of in-situ self-etching free-standing electrode can provide a brand-new insight into extending the pseudocapacitive storage limit,so as to promote the development of high-power energy storage devices including but not limited to AZIBs.