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Novel transition-metal-free cathode for high energy and power sodium rechargeable batteries

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Title
Novel transition-metal-free cathode for high energy and power sodium rechargeable batteries
Author(s)
Kim H.; Park Y.-U.; Park K.-Y.; Lim H.-D.; Hong J.; Kisuk Kang
Publication Date
2014-03
Journal
NANO ENERGY, v.4, no., pp.97 - 104
Publisher
Elsevier BV
Abstract
A low-cost and high-performance energy storage device is a key component for sustainable energy utilization. Recently, sodium (Na) ion batteries have been highlighted as a possible competitor to lithium (Li) ion batteries due to their potential merit in the cost effectiveness. Na resources are earth-abundant, and Na electrochemistry shares many similarities with Li. However, their relatively low energy/power densities and unreliable cycle stability need to be addressed. Herein, we propose a novel high-performance cathode for Na rechargeable batteries based on mass-scalable functionalized graphite nanoplatelets. This new class cathode material can deliver a high energy of ~500Whkg-1 without noticeable capacity decay after 300 cycles. Furthermore, it can retain an energy of ~100Whkg-1 at a power of ~55kWkg-1 (less than 10-s charge/discharge), which is the highest among cathodes for Na ion batteries. This transition-metal-free high-performance cathode is expected to lead to the development of low-cost and high-performance Na rechargeable batteries. © 2013 Elsevier Ltd.
URI
https://pr.ibs.re.kr/handle/8788114/1095
ISSN
2211-2855
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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