石油化工高等学校学报

石油化工高等学校学报 ›› 2022, Vol. 35 ›› Issue (6): 59-65.DOI: 10.3969/j.issn.1006-396X.2022.06.007

• 研究与开发 • 上一篇    下一篇

阳离子取代对尖晶石型硫化物储能性能的影响

李磊1(), 王昆彦1,2, 王育乔1()   

  1. 1.东南大学 化学化工学院,江苏 南京 211189
    2.金陵科技学院 材料工程学院,江苏 南京 211169
  • 收稿日期:2022-05-06 修回日期:2022-07-01 出版日期:2022-12-25 发布日期:2023-01-07
  • 通讯作者: 王育乔
  • 作者简介:李磊(1997⁃),男,硕士研究生,从事纳米储能材料方面的研究;E⁃mail:1206224626@qq.com
  • 基金资助:
    国家自然科学基金项目(61774033)

Effect of Cation Substitution on Energy Storage Performance of Spinel Sulfides

Lei Li1(), Kunyan Wang1,2, Yuqiao Wang1()   

  1. 1.School of Chemistry and Chemical Engineering,Southeast University,Nanjing Jiangsu 211189,China
    2.School of Material Engineering,Jinling Institute of Technology,Nanjing Jiangsu 211169,China
  • Received:2022-05-06 Revised:2022-07-01 Published:2022-12-25 Online:2023-01-07
  • Contact: Yuqiao Wang

摘要:

非对称超级电容器具有快速充放电、高功率密度和长期循环稳定等特点,电极材料的性质对其性能起到决定性作用,利用阳离子取代是调节电极材料结构、性质和优化储能性能的有效方法。通过控制尖晶石型硫化物中的阳离子组成,采用水热法在泡沫镍基底表面制备了MCo2S4(M代表Co、Ni或Cu)纳米片阵列。由于金属离子半径和电负性差异,向Co3S4中引入Ni2+或Cu2+形成NiCo2S4或CuCo2S4,会诱导其晶格结构发生应变,从而提升金属位点的反应活性。相比于Co3S4,NiCo2S4的电荷转移电阻和离子扩散电阻分别下降了48.6%和28.7%,获得了良好的电化学性能。当电流密度为1 A/g时,NiCo2S4的比容量为1 128.8 F/g;当电流密度为10 A/g时,比容量保持率为59.8%;经过8 000次循环后仍保持60.2%的初始比容量。

关键词: 金属硫化物, 阳离子取代, 电荷转移, 离子扩散, 超级电容器

Abstract:

Asymmetric supercapacitors(ASCs) have the merits of rapid charge and discharge,high power density,and long?term cyclic stability.The properties of electrode materials determine the performance of ASCs.Cation substitution is an effective method to tune the structure and properties of electrode materials and optimize energy storage performance accordingly.This paper prepared MCo2S4(M=Co,Ni,or Cu) nanosheet arrays on the surface of a nickel foam substrate.For this purpose,it controlled the cationic components of the spinel sulfide and employed a hydrothermal method.Due to the differences in the radius and electronegativity of metal irons,the lattice structure of Co3S4 underwent strain when Ni2+ or Cu2+ ions were introduced into Co3S4 to obtain NiCo2S4 or CuCo2S4.The result was reinforced reactivity of the metal sites.The charge transfer and ion diffusion resistances of NiCo2S4 are respectively 48.6% and 28.7% lower than those of Co3S4,indicating favorable electrochemical properties achieved.The specific capacity of NiCo2S4 is 1 128.8 F/g under a current density of 1 A/g.The capacity retention is 59.8% under a current density of 10 A/g.The retention of the initial specific capacity is 60.2% after 8 000 cycles.

Key words: Metal sulfide, Cation substitution, Charge transfer, Ion diffusion, Supercapacitor

中图分类号: 

引用本文

李磊, 王昆彦, 王育乔. 阳离子取代对尖晶石型硫化物储能性能的影响[J]. 石油化工高等学校学报, 2022, 35(6): 59-65.

Lei Li, Kunyan Wang, Yuqiao Wang. Effect of Cation Substitution on Energy Storage Performance of Spinel Sulfides[J]. Journal of Petrochemical Universities, 2022, 35(6): 59-65.

使用本文