Improving the capacity of sodium ion battery using a virus-templated nanostructured composite cathode

In this work we investigated an energy-efficient biotemplated route to synthesize nanostructured FePO4 for sodium-based batteries. Self-assembled M13 viruses and single wall carbon nanotubes (SWCNTs) have been used as a template to grow amorphous FePO4 nanoparticles at room temperature (the active composite is denoted as Bio-FePO4-CNT) to enhance the electronic conductivity of the active material. Preliminary tests demonstrate a discharge capacity as high as 166 mAh/g at C/10 rate, corresponding to composition Na0.9FePO4, which along with higher C-rate tests show this material to have the highest capacity and power performance reported for amorphous FePO4 electrodes to date.

M. Moradi, Z. Li, J. Qi, W. Xing, K. Xiang, Y-M. Chiang, and A. M. Belcher
NanoLetters
Volume: 15
Number: 5
Pages: 2917-2921
Date: March, 2015
ICB Affiliated Authors: Angela M Belcher