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

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

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
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 free-standing electrode.Comprehensive 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 ZnxV2O5·nH2O,as well as superior storage kinetics with ultrahigh pseudocapacitive contribution.As 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,respectively.Unexpectedly,an impressive power density of 78.9 kW kg-1 at the super-high current density of 100 A g-1 also can be achieved.Such 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.

In-situ self-etchingFree-standing electrodePseudocapacitive storageHigh-powerZinc-ion batteries

Shuang Hou、Dingtao Ma、Yanyi Wang、Kefeng Ouyang、Sicheng Shen、Hongwei Mi、Lingzhi Zhao、Peixin Zhang

展开 >

College of Chemistry and Environmental Engineering,Shenzhen University,Shenzhen 518060,Guangdong,China

Guangdong Provincial Engineering Technology Research Center for Low Carbon and Advanced Energy Materials,School of Semiconductor Science and Technology,South China Normal University,Foshan 528225,Guangdong,China

SCNU Qingyuan Institute of Science and Technology Innovation Co.,Ltd.,Qingyuan 511517,Guangdong,China

Shenzhen Science and Technology ProgramShenzhen Science and Technology ProgramNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaNational Natural Science Foundation of ChinaScientific and Technological Plan of Guangdong ProvinceScientific and Technological Plan of Guangdong ProvinceNatural Science Foundation of Guangdong ProvinceGuangdong Basic and Applied Basic Research FoundationGuangdong Basic and Applied Basic Research Foundation

JCYJ20200109105805902JCYJ202208180958050122220822122178221423774872019B0909050052019B0909110042021A15151107512022A15151104772021B1515120004

2024

10.1016/j.jechem.2023.09.029

能源化学
中国科学院大连化学物理研究所 中国科学院成都有机化学研究所

能源化学

CSTPCDEI
影响因子：0.654
ISSN：2095-4956
年,卷(期)：2024.88(1)
  • 52