能源化学(英文) ›› 2014, Vol. 23 ›› Issue (3): 301-307.DOI: 10.1016/S2095-4956(14)60151-0

• ARTICLES • 上一篇    下一篇

Electrospun CuFe2O4 nanotubes as anodes for high-performance lithium-ion batteries

Shengjie Penga, Linlin Lia,b, Madhavi Srinivasanb   

  1. a. School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798;
    b. TUM-CREATE Center for Electromobility, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459
  • 收稿日期:2013-11-27 修回日期:2013-12-24 出版日期:2014-05-24 发布日期:2014-05-25
  • 通讯作者: Shengjie Peng, Madhavi Srinivasan
  • 基金资助:

    This work was supported by funding from the National Research Foundation, Clean Energy Research Project (Grant Number: NRF2009EWT-CERP001- 036).

Electrospun CuFe2O4 nanotubes as anodes for high-performance lithium-ion batteries

Shengjie Penga, Linlin Lia,b, Madhavi Srinivasanb   

  1. a. School of Materials Science and Engineering, Nanyang Technological University, Singapore, 639798;
    b. TUM-CREATE Center for Electromobility, Nanyang Technological University, 62 Nanyang Drive, Singapore, 637459
  • Received:2013-11-27 Revised:2013-12-24 Online:2014-05-24 Published:2014-05-25
  • Supported by:

    This work was supported by funding from the National Research Foundation, Clean Energy Research Project (Grant Number: NRF2009EWT-CERP001- 036).

摘要: Herein, we report on the synthesis and lithium storage properties of electrospun one-dimensional (1D) CuFe2O4 nanomaterials. 1D CuFe2O4 nanotubes and nanorods were fabricated by a single spinneret electrospinning method followed by thermal decomposition for removal of polymers from the precursor fibers. The as-prepared CuFe2O4 nanotubes with wall thickness of ~50 nm presented diameters of ~150 nm and lengths up to several millimeters. It was found that phase separation between the electrospun composite materials occured during the electrospinning process, while the as-spun precursor nanofibers composed of polyacrylonitrile (PAN), polyvinylpyrrolidone (PVP) and metal salts might possess a core-shell structure (PAN as the core and PVP/metal salts composite as the shell) and then transformed to a hollow structure after calcination. Moreover, as a demonstration of the functional properties of the 1D nanostructure, CuFe2O4 nanotubes and nanorods were investigated as anodes for lithium ion batteries (LIBs). It was demonstrated that CuFe2O4 nanotubes not only delivered a high reversible capacity of ~816 mAh·g-1 at a current density of 200 mA·g-1 over 50 cycles, but also showed superior rate capability with respect to counterpart nanorods. Probably, the enhanced electrochemical performance can be attributed to its high specific surface areas as well as the unique hollow structure.

关键词: electrospinning, ferrite salts, one-dimensional structures, nanotubes, lithium ion batteries

Abstract: Herein, we report on the synthesis and lithium storage properties of electrospun one-dimensional (1D) CuFe2O4 nanomaterials. 1D CuFe2O4 nanotubes and nanorods were fabricated by a single spinneret electrospinning method followed by thermal decomposition for removal of polymers from the precursor fibers. The as-prepared CuFe2O4 nanotubes with wall thickness of ~50 nm presented diameters of ~150 nm and lengths up to several millimeters. It was found that phase separation between the electrospun composite materials occured during the electrospinning process, while the as-spun precursor nanofibers composed of polyacrylonitrile (PAN), polyvinylpyrrolidone (PVP) and metal salts might possess a core-shell structure (PAN as the core and PVP/metal salts composite as the shell) and then transformed to a hollow structure after calcination. Moreover, as a demonstration of the functional properties of the 1D nanostructure, CuFe2O4 nanotubes and nanorods were investigated as anodes for lithium ion batteries (LIBs). It was demonstrated that CuFe2O4 nanotubes not only delivered a high reversible capacity of ~816 mAh·g-1 at a current density of 200 mA·g-1 over 50 cycles, but also showed superior rate capability with respect to counterpart nanorods. Probably, the enhanced electrochemical performance can be attributed to its high specific surface areas as well as the unique hollow structure.

Key words: electrospinning, ferrite salts, one-dimensional structures, nanotubes, lithium ion batteries