Lithium-ion capacitors with 2D Nb2CTx (MXene) - carbon nanotube electrodes

Byeon, Ayeong, Glushenkov, Alexey M., Anasori, Babak, Urbankowski, Patrick, Li, Jingwen, Byles, Bryan W., Blake, Brian, Van Aken, Katherine L., Kota, Sankalp, Pomerantseva, Ekaterina, Lee, Jae W., Chen, Ying and Gogotsi, Yury 2016, Lithium-ion capacitors with 2D Nb2CTx (MXene) - carbon nanotube electrodes, Journal of power sources, vol. 326, pp. 686-694, doi: 10.1016/j.jpowsour.2016.03.066.

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Title Lithium-ion capacitors with 2D Nb2CTx (MXene) - carbon nanotube electrodes
Author(s) Byeon, Ayeong
Glushenkov, Alexey M.
Anasori, Babak
Urbankowski, Patrick
Li, Jingwen
Byles, Bryan W.
Blake, Brian
Van Aken, Katherine L.
Kota, Sankalp
Pomerantseva, Ekaterina
Lee, Jae W.
Chen, YingORCID iD for Chen, Ying
Gogotsi, Yury
Journal name Journal of power sources
Volume number 326
Start page 686
End page 694
Total pages 9
Publisher Elsevier
Place of publication Amsterdam, The Netherlands
Publication date 2016-09-15
ISSN 0378-7753
Summary There is a growing interest to hybrid energy storage devices, such as lithium-ion capacitors, in which battery-type electrodes are combined with capacitor-type ones. It is anticipated that the energy density (either gravimetric or volumetric) of lithium-ion capacitors is improved if pseudocapacitive or fast insertion materials are used instead of conventional activated carbon (AC) in the capacitor-type electrode. MXenes, a new family of two-dimensional transition metal carbides, demonstrate metallic conductivity and fast charge-discharge behavior that make them suitable for this application. In this study, we move beyond single electrodes, half-cell studies and demonstrate three types of hybrid cells using Nb2CTx-carbon nanotube (CNT) films. It is shown that lithiated graphite/Nb2CTx-CNT, Nb2CTx-CNT/LiFePO4 and lithiated Nb2CTx-CNT/Nb2CTx-CNT cells are all able to operate within 3 V voltage windows and deliver capacities of 43, 24 and 36 mAh/g (per total weight of two electrodes), respectively. Moreover, the polarity of the electrodes can be reversed in the symmetric Nb2CTx-CNT cells from providing a positive potential between 0 and 3 V to a negative one from -3 to 0 V. It is shown that the volumetric energy density (50-70 Wh/L) of our first-generation devices with MXene electrodes exceeds that of a lithium titanate/AC capacitor.
Language eng
DOI 10.1016/j.jpowsour.2016.03.066
Field of Research 100708 Nanomaterials
100712 Nanoscale Characterisation
030604 Electrochemistry
Socio Economic Objective 850602 Energy Storage (excl. Hydrogen)
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2016, Elsevier B.V.
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Document type: Journal Article
Collections: Institute for Frontier Materials
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