无机盐工业
主管:中海油天津化工研究设计院有限公司
主办:中海油天津化工研究设计院有限公司
   中海油炼油化工科学研究院(北京)有限公司
   中国化工学会无机酸碱盐专业委员会
ISSN 1006-4990 CN 12-1069/TQ

无机盐工业 ›› 2023, Vol. 55 ›› Issue (7): 70-74.doi: 10.19964/j.issn.1006-4990.2022-0571

• 研究与开发 • 上一篇    下一篇

C3N4/MnCo2S4复合材料的制备及其电容性能研究

王建芳(), 杨和平, 李凯斌, 丛世强, 张柏洁, 郭珊   

  1. 商洛学院化学工程与现代材料学院,陕西省尾矿资源综合利用重点实验室,陕西 商洛 726000
  • 收稿日期:2022-09-22 出版日期:2023-07-10 发布日期:2023-07-13
  • 作者简介:王建芳(1981— ),女,博士,教授,主要从事金属氧化物材料的制备及应用研究;E-mail:peacefang_2006@163.com
  • 基金资助:
    陕西省教育厅重点科学研究项目(21JS025)

Study on preparation of C3N4/MnCo2S4 composites and their capacitive properties

WANG Jianfang(), YANG Heping, LI Kaibin, CONG Shiqiang, ZHANG Bojie, GUO Shan   

  1. School of Chemical Engineering and Modern Materials,Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources,Shangluo University,Shangluo 726000,China
  • Received:2022-09-22 Published:2023-07-10 Online:2023-07-13

摘要:

以剥离C3N4(氮化碳)纳米片为保护层,在水热过程中对MnCo2S4进行包覆修饰,得到C3N4/MnCo2S4复合材料。借助于C3N4纳米片的包覆保护,复合材料表现出优异的比电容和良好的循环稳定性。采用三电极体系,在6 mol/L的KOH电解液中,当扫描速率为5 mV/s时C3N4/MnCo2S4电极材料的比电容可达到565 F/g,而未包覆修饰的MnCo2S4的比电容为468 F/g。1 A/g的电流密度下,MnCo2S4、C3N4/MnCo2S4电极材料经2 000次的循环充放电测试后,比电容保持率分别为77%和83%。C3N4纳米片对泡沫镍上所生长的MnCo2S4起到保护和防剥落作用,纳米片包覆法为高比电容和良好循环稳定性的电极材料制备提供了新的技术路线。

关键词: MnCo2S4, C3N4纳米片, 防剥落, 超级电容器

Abstract:

The C3N4/MnCo2S4 composites were prepared by coating MnCo2S4 with the exfoliated C3N4(carbon nitride) nanosheets as the protective coat in the hydrothermal process.With the assistance of the coating protection of C3N4 nanosheets,the C3N4/MnCo2S4 composite showed excellent specific capacitance and good cyclic stability.The specific capacitance of C3N4/MnCo2S4 electrode materials was 565 F/g,while the capacitance of MnCo2S4 was 468 F/g at a scan rate of 5 mV/s in 6 mol/L KOH electrolyte via the three-electrode system.At the current density of 1 A/g,the specific capacitance retention of MnCo2S4 and C3N4/MnCo2S4 electrode materials was about 77% and 83% after charging and discharging for 2 000 cycles,respectively.C3N4 nanosheets could prevent MnCo2S4 from peeling off on the nickel foam.The coating method of nanosheets provided a novel technical route to prepare electrode materials with high specific capacitance and good cyclic stability.

Key words: MnCo2S4, C3N4 nanosheets, preventing from peeling off, supercapacitor

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