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Title: Influences from solvents on charge storage in titanium carbide MXenes

Journal Article · · Nature Energy
ORCiD logo [1];  [1];  [1];  [2];  [3];  [4]; ORCiD logo [5];  [1];  [1];  [1];  [6]; ORCiD logo [5]; ORCiD logo [7]; ORCiD logo [1]
  1. Drexel Univ., Philadelphia, PA (United States)
  2. Université Paul Sabatier, Toulouse (France); Sichuan University, Chengdu (China)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Univ. of Tennessee, Knoxville, TN (United States)
  4. Murata Manufacturing Co., Ltd, Nagaokakyo-shi, Kyoto (Japan)
  5. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
  6. National Inst. of Standards and Technology (NIST), Gaithersburg, MD (United States); Univ. of Maryland, College Park, MD (United States)
  7. Université Paul Sabatier, Toulouse (France); Réseau sur le Stockage Electrochimique de l’Energie (RS2E), Amiens (France)

We report that pseudocapacitive energy storage in supercapacitor electrodes differs significantly from the electrical double-layer mechanism of porous carbon materials, which requires a change from conventional thinking when choosing appropriate electrolytes. Here we show how simply changing the solvent of an electrolyte system can drastically influence the pseudocapacitive charge storage of the two-dimensional titanium carbide, Ti3C2 (a representative member of the MXene family). Measurements of the charge stored by Ti3C2 in lithium-containing electrolytes with nitrile-, carbonate- and sulfoxide-based solvents show that the use of a carbonate solvent doubles the charge stored by Ti3C2 when compared with the other solvent systems. We find that the chemical nature of the electrolyte solvent has a profound effect on the arrangement of molecules/ions in Ti3C2, which correlates directly to the total charge being stored. Finally, having nearly completely desolvated lithium ions in Ti3C2 for the carbonate-based electrolyte leads to high volumetric capacitance at high charge–discharge rates, demonstrating the importance of considering all aspects of an electrochemical system during development.

Research Organization:
Energy Frontier Research Centers (EFRC) (United States). Fluid Interface Reactions, Structures and Transport Center (FIRST); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
AC05-00OR22725
OSTI ID:
1502529
Journal Information:
Nature Energy, Vol. 4, Issue 3; ISSN 2058-7546
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 263 works
Citation information provided by
Web of Science

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Cited By (19)

Knittable and Washable Multifunctional MXene‐Coated Cellulose Yarns journal September 2019
Solvation‐Involved Nanoionics: New Opportunities from 2D Nanomaterial Laminar Membranes journal December 2019
Porous g‐C 3 N 4 and MXene Dual‐Confined FeOOH Quantum Dots for Superior Energy Storage in an Ionic Liquid journal November 2019
Electrochemical Behavior of Ti 3 C 2 T x MXene in Environmentally Friendly Methanesulfonic Acid Electrolyte journal August 2019
Advances on three‐dimensional electrodes for micro‐supercapacitors: A mini‐review journal March 2019
Ti 2 CT x MXene‐based all‐optical modulator journal December 2019
“HOT” Alkaline Hydrolysis of Amorphous MOF Microspheres to Produce Ultrastable Bimetal Hydroxide Electrode with Boosted Cycling Stability journal October 2019
An Ultrafast Conducting Polymer@MXene Positive Electrode with High Volumetric Capacitance for Advanced Asymmetric Supercapacitors journal December 2019
Plate-to-Layer Bi2MoO6/MXene-Heterostructured Anode for Lithium-Ion Batteries journal September 2019
Achieving high energy density and high power density with pseudocapacitive materials journal October 2019
La 3+ :Ni–Cl oxyhydroxide gels with enhanced electroactivity as positive materials for hybrid supercapacitors journal January 2020
Microscopic dynamics in room-temperature ionic liquids confined in materials for supercapacitor applications journal January 2020
Low electronegativity Mn bulk doping intensifies charge storage of Ni 2 P redox shuttle for membrane-free water electrolysis journal January 2020
Energy storage: The future enabled by nanomaterials journal November 2019
Interfacial Dissociation of Contact-Ion-Pair on MXene Electrodes in Concentrated Aqueous Electrolytes journal January 2019
MXenes as High-Rate Electrodes for Energy Storage journal July 2020
Stumbling through the Research Wilderness, Standard Methods To Shine Light on Electrically Conductive Nanocomposites for Future Healthcare Monitoring journal November 2019
Interlayer gap widened α-phase molybdenum trioxide as high-rate anodes for dual-ion-intercalation energy storage devices journal March 2020
Predicting the pseudocapacitive windows for MXene electrodes with voltage-dependent cluster expansion models preprint January 2021

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