Phase reconfiguration of heterogeneous CoFeS/CoNiS nanoparticles for superior battery-type supercapacitors

扫码查看

原文链接

NETL
NSTL
万方数据

外文摘要：Developing advanced battery-type materials with abundant active sites,high conductivity,versatile mor-phologies,and hierarchically porous structures is crucial for realizing high-quality hybrid supercapaci-tors.Herein,heterogeneous FeS@NiS is synthesized by cationic Co doping via surface-structure engineering.The density functional theory(DFT)theoretical calculations are firstly performed to predict the advantages of Co dopant by improving the OH-adsorption properties and adjusting electronic struc-ture,benefiting ions/electron transfer.The dynamic surface evolution is further explored which demon-strates that CoFeS@CoNiS could be quickly reconstructed to Ni(Co)Fe2O4 during the charging process,while the unstable structure of the amorphous Ni(Co)Fe2O4 results in partial conversion to Ni/Co/FeOOH at high potentials,which contributes to the more reactive active site and good structural stability.Thus,the free-standing electrode reveals excellent electrochemical performance with a superior capacity(335.6 mA h g-1,2684 F g-1)at 3 A g-1.Furthermore,the as-fabricated device shows a quality energy density of 78.1 W h kg-1 at a power density of 750 W kg-1 and excellent cycle life of 92.1％capacitance retention after 5000 cycles.This work offers a facile strategy to construct versatile morphological struc-tures using electrochemical activation and holds promising applications in energy-related fields.

外文关键词：

In-situ reconfigurationHeterogeneous designBattery-type supercapacitorsSuperior performanceSulphide

作者：

Lina Ma、Fan Li、Min Zhou、Jidong Dong、Hao Luo、Wei Zhang、Wenchao Zhao、Xinliang Li、Zaixing Jiang、Yudong Huang

展开 >

作者单位：

College of Chemistry and Chemical Engineering,Qingdao University,Qingdao 266071,Shandong,China

Material Science and Engineering College,Northeast Forestry University,Harbin 150040,Heilongjiang,China

School of Materials Science and Engineering,Xiamen University of Technology,Xiamen 361024,Fujian,China

Co-Innovation Center of Efficient Processing and Utilization of Forest Resources,College of Materials Science and Engineering,Nanjing Forestry University,Nanjing 210037,Jiangus,China

Key Laboratory of Material Physics,Ministry of Education,School of Physics and Microelectronics,Zhengzhou University,Zhengzhou 450052,Henan,China

MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage,State Key Laboratory of Urban Water Resource and Environment,School of Chemistry and Chemical Engineering,Harbin Institute of Technology,Harbin 150001,Heilongjiang,China

展开 >

基金：

Chang Jiang Scholars ProgramNational Natural Science Foundation of ChinaChina Aerospace Science and Technology Corporation-Harbin Institute of Technology Joint Center for Technology Innovation FunHarbin City Science and Technology ProjectsHarbin City Science and Technology ProjectsNatural Science Foundation of Shandong Province of ChinaCollege Students'Innovation and Entrepreneurship Training Program Projects of Shandong ProvinceScientific Research Foundation of Qingdao UniversityChina Postdoctoral Science Foundation

项目编号：

5107304751773049HIT15-1A012013DB4BP031RC2014QN017035ZR2023QE071S202211065048DC19000094252022TQ0282

出版年：

2024

DOI：

10.1016/j.jechem.2024.03.064

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)：2024.96(9)