Issue 13, 2013
From the journal:

Nanoscale

Synthesis of TiO2 hollow nanofibers by co-axial electrospinning and its superior lithium storage capability in full-cell assembly with olivine phosphate†

X. Zhang,‡ab   V. Aravindan,‡c   P. Suresh Kumar,c   H. Liu,d   J. Sundaramurthy,c   S. Ramakrishna*ae  and  S. Madhavi*bc  

* Corresponding authors

a Department of Mechanical Engineering, National University of Singapore, Singapore 117576, Singapore
E-mail: seeram@nus.edu.sg

b School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
E-mail: Madhavi@ntu.edu.sg

c Energy Research Institute @ NTU (ERI@N), Nanyang Technological University, Research Techno Plaza, 50 Nanyang Drive, Singapore 637553, Singapore
E-mail: aravind_van@yahoo.com

d Department of Chemistry, National University of Singapore, Singapore 117576, Singapore

e Center for Nanofibers and Nanotechnology, National University of Singapore, Singapore 117576

Abstract

We report the formation and extraordinary Li-storage properties of TiO2 hollow nanofibers by co-axial electrospinning in both the half-cell and full-cell configurations. Li-insertion properties are first evaluated as anodes in the half-cell configuration (Li/TiO2 hollow nanofibers) and we found that reversible insertion of ∼0.45 moles is feasible at a current density of 100 mA g−1. The half-cell displayed a good cyclability and retained 84% of its initial reversible capacity after 300 galvanostatic cycles. The full-cell is fabricated with a commercially available olivine phase LiFePO4 cathode under optimized mass loading. The LiFePO4/TiO2 hollow nanofiber cell delivered a reversible capacity of 103 mA h g−1 at a current density of 100 mA g−1 with an operating potential of ∼1.4 V. Excellent cyclability is noted for the full-cell configuration, irrespective of the applied current densities, and it retained 88% of reversible capacity after 300 cycles in ambient conditions at a current density of 100 mA g−1.

Graphical abstract: Synthesis of TiO2 hollow nanofibers by co-axial electrospinning and its superior lithium storage capability in full-cell assembly with olivine phosphate

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Article information

DOI
https://doi.org/10.1039/C3NR01128C
Article type
Paper
Submitted
08 Mar 2013
Accepted
24 Apr 2013
First published
29 Apr 2013

Nanoscale, 2013,5, 5973-5980

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Synthesis of TiO2 hollow nanofibers by co-axial electrospinning and its superior lithium storage capability in full-cell assembly with olivine phosphate

X. Zhang, V. Aravindan, P. S. Kumar, H. Liu, J. Sundaramurthy, S. Ramakrishna and S. Madhavi, Nanoscale, 2013, 5, 5973 DOI: 10.1039/C3NR01128C

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