Journal article
Maximizing ion accessibility in MXene-knotted carbon nanotube composite electrodes for high-rate electrochemical energy storage
Nature communications, v 11(1), pp 6160-6160
01 Dec 2020
PMID: 33268791
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
Improving the accessibility of ions in the electrodes of electrochemical energy storage devices is vital for charge storage and rate performance. In particular, the kinetics of ion transport in organic electrolytes is slow, especially at low operating temperatures. Herein, we report a new type of MXene-carbon nanotube (CNT) composite electrode that maximizes ion accessibility resulting in exceptional rate performance at low temperatures. The improved ion transport at low temperatures is made possible by breaking the conventional horizontal alignment of the two-dimensional layers of the MXene Ti
3
C
2
by using specially designed knotted CNTs. The large, knot-like structures in the knotted CNTs prevent the usual restacking of the Ti
3
C
2
flakes and create fast ion transport pathways. The MXene-knotted CNT composite electrodes achieve high capacitance (up to 130 F g
−1
(276 F cm
−3
)) in organic electrolytes with high capacitance retention over a wide scan rate range of 10 mV s
−1
to 10 V s
−1
. This study is also the first report utilizing MXene-based supercapacitors at low temperatures (down to −60 °C).
Improving the accessibility of ions in the electrodes of electrochemical energy storage devices is vital for charge storage and rate performance. Here, the authors report a new type of MXene-carbon nanotube composite electrode that maximizes ion accessibility, resulting in high rate performance at low temperatures.
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Details
- Title
- Maximizing ion accessibility in MXene-knotted carbon nanotube composite electrodes for high-rate electrochemical energy storage
- Creators
- Xiang Gao - 430074 Wuhan, P R ChinaXuan Du - 430074 Wuhan, P R ChinaTyler S Mathis - Philadelphia, PA 19104 USAMengmeng Zhang - 430074 Wuhan, P R ChinaXuehang Wang - Philadelphia, PA 19104 USAJianglan Shui - 100083 Beijing, P R ChinaYury Gogotsi - Philadelphia, PA 19104 USAMing Xu - 430074 Wuhan, P R China
- Publication Details
- Nature communications, v 11(1), pp 6160-6160
- Publisher
- Nature Publishing Group UK; London
- Grant note
- ;
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering; A.J. Drexel Nanomaterials Institute
- Web of Science ID
- WOS:000598902200004
- Scopus ID
- 2-s2.0-85097025487
- Other Identifier
- 991014969878704721
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Materials Science, Multidisciplinary