Journal article
Bipolar carbide-carbon high voltage aqueous lithium-ion capacitors
Nano energy, v 56, pp 151-159
Feb 2019
Featured in Collection : UN Sustainable Development Goals @ Drexel
Abstract
MXenes - two-dimensional (2D) transition metal carbides and nitrides - are an emerging class of high rate pseudocapacitive materials due to their combination of fast surface redox reactions with metallic conductivity. The ability of MXenes to spontaneously intercalate aqueous cations, broadens the scope for developing metal-ion capacitors beyond the protic electrolytes. In this study, 2D titanium carbide (MXene) free-standing films are employed to evaluate the dependence of electrochemical performance in aqueous Li and Na-ion electrolytes. By contrast, high surface area porous nanoscale carbide derived carbon (nano-CDC) is employed as a surface electrosorbing electrode at anodic potentials. Both, 2D MXene and zero-dimensional (0D) nano-CDC, with contrasting charge storage mechanisms and complementary potential windows of operation, enable the construction of an aqueous Li-ion capacitor with a 2 V voltage window of operation. This asymmetric device shows high rate capability (71% retention from 10 to 1000 mV s−1) and good cycling stability with 99.3% retention after 10,000 cycles. Furthermore, we demonstrate here the design of flexible bipolar carbide-carbon devices.
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•A titanium carbide (MXene)-porous carbide derived carbon based asymmetric aqueous Li-ion capacitor was fabricated.•The widest operating voltage window of 2 V was achieved for MXene devices.•The as assembled devices showed flexibility, ratability and long-term cycle stability.•Bipolar carbide-carbon devices were demonstrated with optimal volumetric performance.
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Details
- Title
- Bipolar carbide-carbon high voltage aqueous lithium-ion capacitors
- Creators
- Jianmin Li - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USANarendra Kurra - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAMykola Seredych - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAXing Meng - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USAHongzhi Wang - State Key Laboratory for Modification of Chemical Fibers and Polymer Materials, College of Materials Science and Engineering, Donghua University, Shanghai 201620, PR ChinaYury Gogotsi - A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering, Drexel University, Philadelphia, PA 19104, USA
- Publication Details
- Nano energy, v 56, pp 151-159
- Publisher
- Elsevier
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Materials Science and Engineering
- Web of Science ID
- WOS:000455264600016
- Scopus ID
- 2-s2.0-85057101462
- Other Identifier
- 991014970030904721
UN Sustainable Development Goals (SDGs)
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- Collaboration types
- Domestic collaboration
- International collaboration
- Web of Science research areas
- Chemistry, Physical
- Materials Science, Multidisciplinary
- Nanoscience & Nanotechnology
- Physics, Applied