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Title: Synergetic effects of K + and Mg 2+ ion intercalation on the electrochemical and actuation properties of the two-dimensional Ti 3 C 2 MXene

Journal Article · · Faraday Discussions
DOI: https://doi.org/10.1039/C6FD00251J · OSTI ID:1408018
ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [1];  [3]; ORCiD logo [1]
  1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Center for Nanophase Materials Science
  2. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States). Materials Science and Technology Division
  3. Drexel Univ., Philadelphia, PA (United States). Dept. of Materials Science and Engineering, A.J. Drexel Nanomaterials Inst.
+ Show Author Affiliations

Two-dimensional materials, such as MXenes, are attractive candidates for energy storage and electrochemical actuators due to their high volume changes upon ion intercalation. Of special interest for boosting energy storage is the intercalation of multivalent ions such as Mg2+, which suffers from sluggish intercalation and transport kinetics due to its ion size. By combining traditional electrochemical characterization techniques with electrochemical dilatometry and contact resonance atomic force microscopy, the synergetic effects of the pre-intercalation of K+ions are demonstrated to improve the charge storage of multivalent ions, as well as tune the mechanical and actuation properties of the Ti3C2MXene. Our results have important implications for quantitatively understanding the charge storage processes in intercalation compounds and provide a new path for studying the mechanical evolution of energy storage materials.

Research Organization:
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1408018
Journal Information:
Faraday Discussions, Journal Name: Faraday Discussions Journal Issue: 1 Vol. 199; ISSN 1359-6640; ISSN FDISE6
Publisher:
Royal Society of ChemistryCopyright Statement
Country of Publication:
United States
Language:
English

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High-Performance Ultrathin Flexible Solid-State Supercapacitors Based on Solution Processable Mo 1.33 C MXene and PEDOT:PSS journal November 2017
The Origin of Electrochemical Actuation of MnO 2 /Ni Bilayer Film Derived by Redox Pseudocapacitive Process journal January 2019
MXene‐Based Composites: Synthesis and Applications in Rechargeable Batteries and Supercapacitors journal February 2019
High Lithium‐Ion Storage Performance of Ti 3 SiC 2 MAX by Oxygen Doping journal May 2019
Surface Modified MXene‐Based Nanocomposites for Electrochemical Energy Conversion and Storage journal May 2019
Applications of 2D MXenes in energy conversion and storage systems journal January 2019
pH-Response of polycation/Ti 3 C 2 T x MXene layer-by-layer assemblies for use as resistive sensors journal January 2020
Mechanochemical engineering of 2D materials for multiscale biointerfaces journal January 2019
A hydrofluoric acid-free synthesis of 2D vanadium carbide (V 2 C) MXene for supercapacitor electrodes journal January 2020

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