纺织学报 ›› 2021, Vol. 42 ›› Issue (08): 49-56.doi: 10.13475/j.fzxb.20200904808

• 纤维材料 • 上一篇    下一篇

聚丙烯腈基Si/C/碳纳米管复合碳纳米纤维膜的制备及其储能性能

张亚茹1,2, 胡毅1,2(), 程钟灵1,2, 许仕林1,2   

  1. 1.浙江理工大学 先进纺织材料与制备技术教育部重点实验室, 浙江 杭州 310018
    2.浙江理工大学 生态染整技术教育部工程研究中心, 浙江 杭州 310018
  • 收稿日期:2020-09-21 修回日期:2021-05-01 出版日期:2021-08-15 发布日期:2021-08-24
  • 通讯作者: 胡毅
  • 作者简介:张亚茹(1995—),女,硕士生。主要研究方向为碳纳米纤维的制备及储能应用。
  • 基金资助:
    浙江省自然科学基金项目(LY21E030023);浙江理工大学基本科研业务费专项资金资助项目(2020Y001)

Preparation and energy storage properties of polyacrylonitrile-based Si/C/carbon nanotube composite carbon nanofiber membrane

ZHANG Yaru1,2, HU Yi1,2(), CHENG Zhongling1,2, XU Shilin1,2   

  1. 1. Key Laboratory of Advanced Textile Materials and Manufacturing Technology, Ministry of Education,Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
    2. Engineering Research Center for Eco-Dyeing & Finishing of Textiles, Ministry of Education, Zhejiang Sci-Tech University, Hangzhou, Zhejiang 310018, China
  • Received:2020-09-21 Revised:2021-05-01 Published:2021-08-15 Online:2021-08-24
  • Contact: HU Yi

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摘要：

针对Si材料储能过程中体积膨胀的问题,首先采用静电纺丝技术制备聚丙烯腈(PAN)/Si /Fe复合纳米纤维(NFs)膜,然后经化学气相沉积法在复合NFs膜上生长碳纳米管(CNTs),最后经800 ℃炭化得到PAN基Si/C/CNTs复合碳纳米纤维(CNFs)膜。借助扫描电子显微镜、透射电子显微镜、X射线衍射仪、热重分析仪等表征复合CNFs膜的结构与性能,并将其用于锂离子电池负极进行电化学性能测试。结果表明:用添加质量分数为15% 的FeSO4(占PAN)催化剂的纺丝液制备的复合CNFs膜具有独特毛毛虫结构,其可有效提升电池的电化学性能,具有2 067.9 mA·h/g的初始放电比容量,循环400圈后仍具有851.2 mA·h/g 的放电比容量,每圈的容量衰减率仅为 0.15%。

关键词: 静电纺丝, 化学气相沉积法, 碳纳米管, 复合碳纳米纤维, 储能性能

Abstract:

In order to overcome volume expansion in energy storage process of silicon materials, electrospinning technology was used to prepare polyacrylonitrile (PAN)/Si/Fe composite nano-fiber(NFs) membrane, which was deposited on the composite NFs by chemical vapor deposition method for growth of carbon nanotubes (CNTs). Carbonization took place afterwards at 800 ℃ to obtain PAN-based Si/C/CNTs composite carbon nanofiber(CNFs)membrane. The structure and properties of composite CNFs membrane were characterized by scanning electron microscope, transmission electron microscope, X-ray diffractometer and thermogravimetric analyzer. The fabricated membrane was used in the negative electrode of lithium ions battery, and the corresponding electrochemical performance test was carried out. The results show that with the catalyst of 15% FeSO4 (compared to PAN) in spinning solution, a unique caterpillar structure composite CNFs membrane appears which effectively improves the electrochemical performance of the battery. It has an initial specific discharge capacity of 2 067.9 mA·h/g, and it still maintains a specific discharge capacity of 851.2 mA·h/g after 400 cycles, with a capacity decay rate per cycle being only 0.15%.

Key words: electrospinning, chemical vapor deposition method, carbon nanotube, composite carbon nanofiber, energy storage performance

中图分类号: 

  • TQ340.64

图1

不同质量分数FeSO4制备的复合CNFs膜的扫描电镜照片"

图2

不同铁盐制备的复合CNFs膜扫描电镜照片"

图3

Si/C/CNT复合CNFs膜在高倍和低倍下的透射电镜照片"

图4

Si/C/CNTs复合CNFs膜的Raman光谱图"

图5

Si/C/CNTs复合CNFs膜的扫描电镜照片及表面元素分布照片"

图6

Si/C/CNTs复合CNFs膜XPS谱图"

图7

复合CNFs膜的氮气吸/脱附曲线和孔径分布图"

图8

Si/C/CNTs复合CNFs膜的热重曲线"

图9

Si/C/CNTs复合CNFs膜的X射线衍射曲线"

图10

复合CNFs膜负极锂离子电池电化学曲线"

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