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Title: First-Principles Modeling of Sodium Ion and Water Intercalation into Titanium Disulfide Interlayers for Water Desalination

Journal Article · · Chemistry of Materials

Recent experiments revealed the possibility of using titanium disulfide (TiS2) as the cathode material in capacitive deionization (CDI) devices for water desalination. Although it performed stably up to 70 cycles with a salt removal capacity of 14 mg/g (corresponding to a sodium ion removal capacity of 35.8 mg/g) at high molar concentration (600 mM NaCl), the maximum capacity of TiS2 as a CDI electrode was much lower (~70 mAh/g) than as a supercapacitor (239 mAh/g). Understanding why the ion capacities of these two configurations of the same material differ will entail elucidating detailed charge/discharge mechanisms at the atomic scale. Here, we present density functional theory simulations of sodium intercalation into TiS2 interlayers in order to gain such understanding. We systematically investigated TiS2 stacking patterns and ion intercalation sites, energetics of the intercalated compounds, and phase transformation during sodium intercalation. The calculated structural evolution and capacitance–voltage curve agree quite well with previous measurements. We conclude that the different maximum capacities of TiS2 measured in aqueous and dry environments originate from weaker interlayer interactions with respect to shear strain after ~33% intercalation of Na+–H2O pairs, which is detrimental to the mechanical stability of TiS2. In conclusion, this study sheds light on the underlying mechanisms of ion intercalation into layered materials and contributes to understanding requirements for future design and optimization of CDI electrode materials for water desalination.

Research Organization:
Princeton Univ., NJ (United States)
Sponsoring Organization:
USDOE Office of Science (SC), Basic Energy Sciences (BES)
Grant/Contract Number:
SC0019394
OSTI ID:
1808323
Journal Information:
Chemistry of Materials, Vol. 32, Issue 24; ISSN 0897-4756
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English

References (50)

The Future of Seawater Desalination: Energy, Technology, and the Environment journal August 2011
Four billion people facing severe water scarcity journal February 2016
State-of-the-art of reverse osmosis desalination journal October 2007
Faradaic reactions in capacitive deionization (CDI) - problems and possibilities: A review journal January 2018
Faradaic Electrodes Open a New Era for Capacitive Deionization journal October 2020
Charge-transfer materials for electrochemical water desalination, ion separation and the recovery of elements journal April 2020
Review on the science and technology of water desalination by capacitive deionization journal October 2013
Electrosorption of Inorganic Salts from Aqueous Solution Using Carbon Aerogels journal July 2002
Desalting by Means of Porous Carbon Electrodes journal January 1971
Novel Graphene-Like Electrodes for Capacitive Deionization journal November 2010
Capacitive deionization of NaCl solutions using carbon nanotube sponge electrodes journal January 2011
Reduced graphene oxide and activated carbon composites for capacitive deionization journal January 2012
Surface charge enhanced carbon electrodes for stable and efficient capacitive deionization using inverted adsorption–desorption behavior journal January 2015
Graphene-based materials for capacitive deionization journal January 2017
Low Energy Desalination Using Battery Electrode Deionization journal September 2017
Three-Dimensional Graphene/Metal Oxide Nanoparticle Hybrids for High-Performance Capacitive Deionization of Saline Water journal August 2013
Ion Removal Performance, Structural/Compositional Dynamics, and Electrochemical Stability of Layered Manganese Oxide Electrodes in Hybrid Capacitive Deionization journal September 2018
Unveiling two-dimensional TiS 2 as an insertion host for the construction of high energy Li-ion capacitors journal January 2017
TiS 2 as an Advanced Conversion Electrode for Sodium-Ion Batteries with Ultra-High Capacity and Long-Cycle Life journal September 2018
Tracking the Chemical and Structural Evolution of the TiS 2 Electrode in the Lithium-Ion Cell Using Operando X-ray Absorption Spectroscopy journal June 2018
In Situ Electron Microscopy Investigation of Sodiation of Titanium Disulfide Nanoflakes journal July 2019
Titanium Disulfide: A Promising Low-Dimensional Electrode Material for Sodium Ion Intercalation for Seawater Desalination journal November 2017
In Situ Tracking of Partial Sodium Desolvation of Materials with Capacitive, Pseudocapacitive, and Battery-like Charge/Discharge Behavior in Aqueous Electrolytes journal September 2018
Tracking sodium migration in TiS 2 using in situ TEM journal January 2019
Strain-induced semimetal-to-semiconductor transition and indirect-to-direct band gap transition in monolayer 1T-TiS 2 journal January 2015
Structural stability and intriguing electronic properties of two-dimensional transition metal dichalcogenide alloys journal January 2017
Structural chemistry of layered materials and their intercalates journal January 1980
Physical properties of first-row transition metal dichalcogenides and their intercalates journal January 1980
The formation of 1T and 2H titanium disulfide by deintercalation of NaxTiS2 journal January 1984
Efficiency of ab-initio total energy calculations for metals and semiconductors using a plane-wave basis set journal July 1996
Efficient iterative schemes for ab initio total-energy calculations using a plane-wave basis set journal October 1996
Projector augmented-wave method journal December 1994
From ultrasoft pseudopotentials to the projector augmented-wave method journal January 1999
Strongly Constrained and Appropriately Normed Semilocal Density Functional journal July 2015
Versatile van der Waals Density Functional Based on a Meta-Generalized Gradient Approximation journal October 2016
Angle-resolved photoemission studies of the band structure of Ti Se 2 and Ti S 2 journal January 1980
Etude comparative des composés TiX2 (X = S, Se, Te). Structures de TiTe2 et TiSeTe journal September 1981
A high pressure x-ray diffraction study of titanium disulfide journal December 2008
The impact of charge transfer and structural disorder on the thermoelectric properties of cobalt intercalated TiS 2 journal January 2016
Special points for Brillouin-zone integrations journal June 1976
A fast and robust algorithm for Bader decomposition of charge density journal June 2006
Improved grid-based algorithm for Bader charge allocation journal January 2007
A grid-based Bader analysis algorithm without lattice bias journal January 2009
Phase Transformations in TiS 2 during K Intercalation journal July 2017
Ab Initio Study of the Sodium Intercalation and Intermediate Phases in Na 0.44 MnO 2 for Sodium-Ion Battery journal March 2012
Computational understanding of Li-ion batteries journal March 2016
First-Principles Prediction of Vacancy Order-Disorder and Intercalation Battery Voltages in Li x CoO 2 journal July 1998
Cation and vacancy ordering in Li x CoO 2 journal January 1998
Ordering in Lix(Ni0.5Mn0.5)O2 and its relation to charge capacity and electrochemical behavior in rechargeable lithium batteries journal October 2004
Ab initiomolecular dynamics for liquid metals journal January 1993