Journal
NANO LETTERS
Volume 12, Issue 11, Pages 5664-5668Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl302819f
Keywords
Grid energy storage; Na-ion battery; cathodes material; amorphous FePO4
Categories
Funding
- University of Maryland College Park
- Army Research Office [W911NF1110231]
- Ellen Williams Distinguished Postdoctoral Fellowship
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Sodium ion batteries (SIBs) are promising candidates for the applications of large-scale energy storage due to their cost-effective and environmental friendly characteristics. Nevertheless, it remains a practical challenge to find a cathode material of SIBs showing ideal performance (capacity, reversibility, etc). We report here a nanocomposite material of amorphous, porous FePO4 nanoparticles electrically wired by single-wall carbon nanotubes as a potential cathode material for SIBs. The hydrothermally synthesized nanocomposite shows excellent cell performance with unprecedented Cycling stability and reversibility. The discharge capacity of as high as 120 mAh/g is delivered at a 0.1 C rate (10 mA/g). The capacity retentions are about 70 mAh/g, 60 mAh/g, and 55 mAh/g at higher currents of 20 mA/g, 40 mA/g, and 60 mA/g, respectively. Even at a 1 C rate (100 mA/g), a capacity of about 50 mAh/g is still retained after 300 cycles. With a simple synthetic procedure, cost-effective chemicals, and desirable cell performance, this method offers a highly promising candidate for commercialized cathode materials of SIBs.
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