Morphologically Robust NiFe2O4 Nanofibers as High Capacity Li-Ion Battery Anode Material

作者：Cherian Christie Thomas; Sundaramurthy Jayaraman; Reddy M V; Kumar Palanisamy Suresh; Mani Kalaivani; Pliszka Damian; Sow Chorng Haur; Ramakrishna Seeram^*; Chowdari B V R

来源：ACS Applied Materials & Interfaces, 2013, 5(20): 9957-9963.

DOI：10.1021/am401779p

• NiFe2O4
• nanofibers
• electrospinning
• anode
• Li-ion battery
• impedance

In this work, the electrochemical performance of NiFe2O4 nanofibers synthesized by an electrospinning approach have been discussed in detail. Lithium storage properties of nanofibers are evaluated and compared with NiFe2O4 nanoparticles by galvanostatic cycling and cyclic voltammetry studies, both in half-cell configurations. Nanofibers exhibit a higher charge-storage capacity of 1000 mAh g(-1) even after 100 cycles with high Coulmbic efficiency of 100 % between 10 and 100 cycles. Ex situ microscopy studies confirmed that cycled nanofiber electrodes maintained the morphology and remained intact even after 100 charge-discharge cycles. The NiFe2O4 nanofiber electrode does not experience any structural stress and eventual pulverisation during lithium cycling and hence provides an efficient electron conducting pathway. The excellent electrochemical performance of NiFe2O4 nanofibers is due to the unique porous morphology of continuous nanofibers.

• 出版日期2013-10