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High-Performance Hybrid Supercapacitor Based on Graphene-Wrapped Li4Ti5O12 and Activated Carbon

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Title
High-Performance Hybrid Supercapacitor Based on Graphene-Wrapped Li4Ti5O12 and Activated Carbon
Author(s)
Haegyeom Kim; Kyu-Young Park; Min-Young Cho; Mok-Hwa Kim; Jihyun Hong; Sung-Kyun Jung; Kwang Chul Roh; Kisuk Kang
Publication Date
2014-01
Journal
CHEMELECTROCHEM, v.1, no.1, pp.125 - 130
Publisher
Wiley-VCH Verlag GmbH & Co
Abstract
Hybridizing battery and supercapacitor technologies have the potential to overcome the limitations of the currently prevailing energy-storage systems. Combining high-power capacitive electrodes from supercapacitors with the high-energy intercalation electrodes in lithium-ion batteries provides the opportunity to create a single device that can deliver both high energy and high power. Although energy densities in such hybrid systems easily exceed those found in supercapacitors, the kinetic imbalance between capacitive and intercalation electrodes remains a bottleneck to achieving the desired performance. This imbalance is eliminated through the use of graphene-wrapped Li4Ti5O12 from a simple, one-step process as a high-power anode in a new hybrid supercapacitor. The new hybrid supercapacitors are capable of delivering a high specific energy of up to 50 Whkg1 and can even maintain an energy of approximately 15 Whkg1 at a 20 s charge/discharge rate.
URI
https://pr.ibs.re.kr/handle/8788114/1147
ISSN
2196-0216
Appears in Collections:
Center for Nanoparticle Research(나노입자 연구단) > Journal Papers (저널논문)
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