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Title: Characterization of Resistances of a Capacitive Deionization System

Journal Article · · Environmental Science and Technology
 [1];  [2];  [3];  [2]
  1. Stanford Univ., Stanford, CA (United States); Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
  3. Stanford Univ., Stanford, CA (United States)

Capacitive deionization (CDI) is a promising desalination technology, which operates at low pressure, low temperature, requires little infrastructure, and has the potential to consume less energy for brackish water desalination. However, CDI devices consume significantly more energy than the theoretical thermodynamic minimum, and this is at least partly due to resistive power dissipation. We here report our efforts to characterize electric resistances in a CDI system, with a focus on the resistance associated with the contact between current collectors and porous electrodes. We present an equivalent circuit model to describe resistive components in a CDI cell. We propose measurable figures of merit to characterize cell resistance. We also show that contact pressure between porous electrodes and current collectors can significantly reduce contact resistance. As a result, we propose and test an alternative electrical contact configuration which uses a pore-filling conductive adhesive (silver epoxy) and achieves significant reductions in contact resistance.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1408994
Report Number(s):
LLNL-JRNL-663458; TRN: US1702957
Journal Information:
Environmental Science and Technology, Vol. 49, Issue 16; ISSN 0013-936X
Publisher:
American Chemical Society (ACS)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 103 works
Citation information provided by
Web of Science

References (39)

Review on the science and technology of water desalination by capacitive deionization journal October 2013
Capacitive deionization as an electrochemical means of saving energy and delivering clean water. Comparison to present desalination practices: Will it compete? journal April 2010
Energy consumption in membrane capacitive deionization for different water recoveries and flow rates, and comparison with reverse osmosis journal December 2013
Energy Recovery in Membrane Capacitive Deionization journal April 2013
Energetic performance optimization of a capacitive deionization system operating with transient cycles and brackish water journal April 2013
Optimizing the Energy Efficiency of Capacitive Deionization Reactors Working under Real-World Conditions journal September 2013
Enhanced charge efficiency and reduced energy use in capacitive deionization by increasing the discharge voltage journal May 2015
New testing procedures of a capacitive deionization reactor journal January 2013
Optimization of salt adsorption rate in membrane capacitive deionization journal April 2013
Comparison of salt adsorption capacity and energy consumption between constant current and constant voltage operation in capacitive deionization journal November 2014
The Influence of Conductive Additives and Inter-Particle Voids in Carbon EDLC Electrodes journal July 2010
Analysis of non-uniform charge/discharge and rate effects in porous carbon capacitors containing sub-optimal electrolyte concentrations journal September 2000
Reduction of porous carbon/Al contact resistance for an electric double-layer capacitor (EDLC) journal March 2013
Strategies to reduce the resistance sources on Electrochemical Double Layer Capacitor electrodes journal September 2013
High-performance carbon-based supercapacitors using Al current-collector with conformal carbon coating journal September 2009
Characteristics and performance of 500 F asymmetric hybrid advanced supercapacitor prototypes journal January 2003
Electrochemical Characteristics and Impedance Spectroscopy Studies of Carbon-Carbon Supercapacitors journal January 2003
Modification of Al current collector surface by sol–gel deposit for carbon–carbon supercapacitor applications journal March 2004
Electrochemical modification of active carbon fiber electrode and its application to double-layer capacitor journal June 1996
Manganese-based lithium batteries for hybrid electric vehicle applications journal June 2003
High surface area carbon aerogel monoliths with hierarchical porosity journal July 2008
Impedance-based study of capacitive porous carbon electrodes with hierarchical and bimodal porosity journal November 2013
Capacitive desalination with flow-through electrodes journal January 2012
On porous electrodes in electrolyte solutions—IV journal September 1964
The analysis of electrode impedances complicated by the presence of a constant phase element journal September 1984
Impedance Spectroscopy book January 2005
Technical Note: Concerning the Conversion of the Constant Phase Element Parameter Y 0 into a Capacitance journal September 2001
The Importance of Interphase Contacts in Li Ion Electrodes: The Meaning of the High-Frequency Impedance Arc journal January 2008
Porous glass electroosmotic pumps: theory journal December 2003
Investigation of interfacial capacitance of Pt, Ti and TiN coated electrodes by electrochemical impedance spectroscopy journal August 2002
Experimental limitations in impedance spectroscopy: Part IV. Electrode contact effects journal June 1997
The Electrodeposition of Silver from Supercritical Carbon Dioxide/Acetonitrile journal November 2013
Dynamic Control Over Electronic Transport in 3D Bulk Nanographene via Interfacial Charging journal February 2014
Capacitive Deionization of NaCl and NaNO[sub 3] Solutions with Carbon Aerogel Electrodes journal January 1996
Electrosorption of NaCl Solutions with Carbon Nanotubes and Nanofibers Composite Film Electrodes journal January 2006
Enhanced desalination efficiency in capacitive deionization with an ion-selective membrane journal January 2010
Water Desalination Using Capacitive Deionization with Microporous Carbon Electrodes journal February 2012
Dynamics of removal of organosulfur compounds from diesel by adsorption on carbon aerogels for fuel cell applications journal September 2005
Diffusion in liquid-filled pores of activated carbon. I. Pore volume diffusion journal April 1994

Cited By (6)

Free-Standing Electrodes Derived from Metal-Organic Frameworks/ Nanofibers Hybrids for Membrane Capacitive Deionization journal September 2018
Curved Fragmented Graphenic Hierarchical Architectures for Extraordinary Charging Capacities journal May 2018
Electrokinetic desalination of brackish water and associated challenges in the water and energy nexus journal January 2018
A multiscale-pore ion exchange membrane for better energy efficiency journal January 2018
Interconnected metal oxide CNT fibre hybrid networks for current collector-free asymmetric capacitive deionization journal January 2018
Maximizing Volumetric Removal Capacity in Capacitive Deionization by Adjusting Electrode Thickness and Charging Mode journal January 2018