高等学校化学学报 ›› 2020, Vol. 41 ›› Issue (4): 821-828.doi: 10.7503/cjcu20190581

• 材料化学 • 上一篇    下一篇

三维交联石墨烯纳米纤维的合成及储锂性能

计天溢1,2,刘晓旭1,*,赵九蓬3,李垚4,*()   

  1. 1. 陕西科技大学材料科学与工程学院, 陕西省无机材料绿色制备与功能化重点实验室, 西安 710021
    2. 黑龙江科技大学矿业工程学院, 哈尔滨 150022
    3. 哈尔滨工业大学化工与化学学院, 哈尔滨 150001
    4. 哈尔滨工业大学复合材料与结构研究所, 哈尔滨 150001
  • 收稿日期:2019-11-11 出版日期:2020-04-10 发布日期:2020-02-21
  • 通讯作者: 刘晓旭,李垚 E-mail:xiaoxuliu@sust.edu.cn
  • 基金资助:
    国家自然科学基金(51761135123);中国博士后科学基金(2018M630339);黑龙江省大学生创新创业计划项目(201810219033)

Synthesis and Lithium-storage Characteristics of Three-dimensional Cross-linked Graphene Nanofibers

JI Tianyi1,2,LIU Xiaoxu1,*,ZHAO Jiupeng3,LI Yao4,*()   

  1. 1. School of Materials Science and Engineering, Shaanxi Key Laboratory of Green Preparation and Functionalization for Inorganic Materials, Shaanxi University of Science and Technology, Xi’an 710021, China;
    2. College of Mining Engineering, Heilongjiang University of Science and Technology, Harbin 150022, China
    3. School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin 150001, China
    4. Institute of Composite Materials and Structures, Harbin Institute of Technology, Harbin 150001, China
  • Received:2019-11-11 Online:2020-04-10 Published:2020-02-21
  • Contact: Xiaoxu LIU,Yao LI E-mail:xiaoxuliu@sust.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(51761135123);the China Postdoctoral Science Foundation(2018M630339);the College Students’ Innovation and Entrepreneurship Training Program of Heilongjiang Province, China(201810219033)

摘要:

以氧化石墨烯为原料, 高温下自组装得到高结晶的三维交联石墨烯纳米纤维. 扫描电子显微镜和透射电子显微镜观测结果表明, 三维石墨烯纳米纤维为实心结构, 直径小于100 nm, 石墨烯片层有序排列卷曲, 具有较高的结晶度. 电化学性能研究结果表明, 该纳米纤维作为锂离子电池负极材料时, 展现出较高的首次库仑效率(72.4%)与储锂容量(0.1C倍率下容量为692.7 mA·h/g)、 良好的倍率性能(20C倍率下容量为373.3 mA·h/g)及优异的循环稳定性(1000次循环后容量保持率为84.1%).

关键词: 三维交联石墨烯, 纳米纤维, 锂离子电池

Abstract:

High crystalline 3D cross-linked graphene nanofibers(3DCGNs) were self-assembled from graphene oxide at high temperature. SEM and TEM tests show that the 3DCGNs have solid-core structure with a diameter less than 100 nm. The layers of graphene are arranged in order, with higher crystallinity. The material served as a negative electrode for lithium ion battery and exhibited excellent electrochemical properties, such as high first Coulombic efficiency(72.4%) and storage lithium capacity(692.7 mA·h/g at 0.1C), good rating performance(373.3 mA·h/g at 20C) and outstanding cycling stability(capacity retention of 84.1% after 1000 cycles) and so on. This research also adds new ideas for the preparation of graphene-based electrode materials.

Key words: 3D cross-linked graphene, Nanofibers, Lithium ion battery

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