Novel transition-metal-free cathode for high energy and power sodium rechargeable batteries
- Authors
- Kim, Haegyeom; Park, Young-Uk; Park, Kyu-Young; Lim, Hee-Dae; Hong, Jihyun; Kang, Kisuk
- Issue Date
- Mar-2014
- Publisher
- ELSEVIER SCIENCE BV
- Keywords
- Sodium; Batteries; Electrochemistry; Energy storage; Graphite
- Citation
- NANO ENERGY, v.4, pp.97 - 104
- Indexed
- SCIE
SCOPUS
- Journal Title
- NANO ENERGY
- Volume
- 4
- Start Page
- 97
- End Page
- 104
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/187524
- DOI
- 10.1016/j.nanoen.2013.12.009
- ISSN
- 2211-2855
- 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 similar to 500W h kg(-1) without noticeable capacity decay after 300 cycles. Furthermore, it can retain an energy of similar to 100 W h kg(-1) at a power of 55 kW kg(-1) (less than 10-s charge/discharge), which is the highest among cathodes for Na ion batteries. This transition-metalfree high-performance cathode is expected to lead to the development of low-cost and high-performance Na rechargeable batteries.
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