Facile synthesis of NiMn2S4 nanoflakes on nickel foam for high-performance aqueous asymmetric supercapacitors

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外文摘要：Supercapacitors display promising electrochemical performance with high power density and excellent cycle stability.However,their low energy density limits their advancement in a broader range of applications.To enhance their energy density,we proposed self-assembled spinel NiMn2S4 nanoflakes grown on nickel foam which we successfully prepared by a facile hy-drothermal method.The NiMn2S4 electrode delivers a high capacitance of 2096.7 F g-1 at 1.0 A g-1,with an exceptional rate capability(～720.6 F g-1 at a very high current density of 100 A g-1)and good cycle stability(～85.1％retention of the initial capacitance after 7000 cycles with the Coulombic eficiency around 100％).The as-fabricated asymmetric supercapacitors based on NiMn2S4 nanoflakes//active carbon demonstrate an energy density of 73.6 W h kg-1 at 800.5 W kg 1 and adequate cycling performance of～84.6％capacitance retention at 15 A g-1 after 10000 cycles.The results reveal that the nanostructured NiMn2S4 is an excellent electrode material for high-performance energy storage applications.

外文关键词：

NiMn2S4 nanostructurehigh capacitanceaqueous supercapacitorslong cycle stabilityhigh energy density

作者：

ADIL Emin、LI YaLi、GAO Zhe、DONG YunXia、LI DongHao、CHEN YongChao、FU YuJun、HE DeYan、LI JunShuai

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作者单位：

LONGi Institute of Future Technology,and School of Materials & Energy,Lanzhou University,Lanzhou 730000,China

基金：

Natural Science Foundation of Gansu,ChinaNatural Science Foundation of Gansu,ChinaFundamental Research Funds for the Central Universities

项目编号：

22YF7GA00920JR10RA611Izujbky-2021 sp54

出版年：

2024

DOI：

10.1007/s11431-023-2503-8

中国科学:技术科学(英文版)

中国科学院

中国科学:技术科学(英文版)

CSTPCDEI

影响因子：1.056

ISSN：1674-7321

年,卷(期)：2024.67(2)

参考文献量65