Journal
NANO LETTERS
Volume 15, Issue 5, Pages 2917-2921Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl504676v
Keywords
Sodium ion battery; amorphous FePO4; biotemplated active material; SWCNT; high-power rechargeable battery
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Funding
- Institute for Collaborative Biotechnologies through U.S. Army Research Office [W911NF-09-0001]
- Advanced Research Projects Agency-Energy (ARPA-E), US Department of Energy [DE-AR0000065]
- Basic Energy Science (BES), US Department of Energy [DE-SC0002626]
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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.
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