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Title: Effect of glycine functionalization of 2D titanium carbide (MXene) on charge storage

Journal Article · · Journal of Materials Chemistry. A
DOI:https://doi.org/10.1039/C7TA11347A· OSTI ID:1435210
 [1]; ORCiD logo [2];  [2]; ORCiD logo [2];  [3]; ORCiD logo [3]; ORCiD logo [2]
  1. Drexel Univ., Philadelphia, PA (United States). A.J. Drexel Nanomaterials Inst.; Huazhong Univ. of Science and Technology, Wuhan (China). School of Optical and Electronic Information
  2. Drexel Univ., Philadelphia, PA (United States). A.J. Drexel Nanomaterials Inst.
  3. Huazhong Univ. of Science and Technology, Wuhan (China). School of Optical and Electronic Information

Restacking of two-dimensional (2D) flakes reduces the accessibility of electrolyte ions and is a problem in energy storage and other applications. Organic molecules can be used to prevent restacking and keep the interlayer space open. In this paper, we report on a combined theoretical and experimental investigation of the interaction between 2D titanium carbide (MXene), Ti3C2Tx, and glycine. From first principle calculations, we presented the functionalization of glycine on the Ti3C2O2 surface, evidenced by the shared electrons between Ti and N atoms. To experimentally validate our predictions, we synthesized flexible freestanding films of Ti3C2Tx/glycine hybrids. X-ray diffraction and X-ray photoelectron spectroscopy confirmed the increased interlayer spacing and possible Ti–N bonding, respectively, which agree with our theoretical predictions. Finally, the Ti3C2Tx/glycine hybrid films exhibited an improved rate and cycling performances compared to pristine Ti3C2Tx, possibly due to better charge percolation within expanded Ti3C2Tx.

Research Organization:
Drexel Univ., Philadelphia, PA (United States); Huazhong Univ. of Science and Technology, Wuhan (China); Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES); Chinese Scholarship Council (CSC)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1435210
Journal Information:
Journal of Materials Chemistry. A, Vol. 6, Issue 11; ISSN 2050-7488
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 73 works
Citation information provided by
Web of Science

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Cited By (9)

Microstructure and surface control of MXene films for water purification journal September 2019
Review of MXenes as new nanomaterials for energy storage/delivery and selected environmental applications journal October 2018
Inkjet Printing of Self-Assembled 2D Titanium Carbide and Protein Electrodes for Stimuli-Responsive Electromagnetic Shielding journal June 2018
3D Ti 3 C 2 T x aerogels with enhanced surface area for high performance supercapacitors journal January 2018
Two-dimensional materials for miniaturized energy storage devices: from individual devices to smart integrated systems journal January 2018
MXene‐Based Composites: Synthesis and Applications in Rechargeable Batteries and Supercapacitors journal February 2019
Interaction of single- and double-stranded DNA with multilayer MXene by fluorescence spectroscopy and molecular dynamics simulations journal January 2019
Tunable Magnetic Response in 2D Materials via Reversible Intercalation of Paramagnetic Ions journal May 2019
MXene-Conducting Polymer Asymmetric Pseudocapacitors journal December 2018

Figures / Tables (4)