Ultrahigh Desalinization Performance of Asymmetric Flow-Electrode Capacitive Deionization Device with an Improved Operation Voltage of 1.8 V

Flow-electrode capacitive deionization (FCDI) is an emerging desalinization technology for high-concentration saline water treatment. However, in practical cases the operation voltage of FCDI is usually limited by the decomposition potential of water (1.23 V), which does harm the desalinization performance of FCDI. To address this issue, here for the first time we propose a novel asymmetric FCDI (AFCDI) device by using an activated carbon (AC)/MnO2 suspension as the positive electrode and AC suspension as the negative electrode. In AFCDI, the operation voltage can be improved to be 1.8 V, and a high salt removal efficiency of 78% is achieved in 0.1 M NaCl solution within 2 h, much higher than that for conventional FCDI (59%). To the best of knowledge, this value is also much higher than those for other FCDI devices reported previously. The present work may provide a promising high-performance desalinization device for high-concentration saline water treatment.

[1]  Jeyong Yoon,et al.  CDI ragone plot as a functional tool to evaluate desalination performance in capacitive deionization , 2015 .

[2]  Chao Pan,et al.  Hierarchical activated carbon nanofiber webs with tuned structure fabricated by electrospinning for capacitive deionization , 2012 .

[3]  J. Chen,et al.  Cellulose Framework Directed Construction of Hierarchically Porous Carbons Offering High-Performance Capacitive Deionization of Brackish Water , 2016 .

[4]  Lijun He,et al.  The study of capacitive deionization behavior of a carbon nanotube electrode from the perspective of charge efficiency. , 2015, Water science and technology : a journal of the International Association on Water Pollution Research.

[5]  Y. Liu,et al.  Enhanced capacitive deionization performance of graphene by nitrogen doping. , 2015, Journal of colloid and interface science.

[6]  Zhuo Sun,et al.  Electrosorptive desalination by carbon nanotubes and nanofibres electrodes and ion-exchange membranes. , 2008, Water research.

[7]  Saeid Eslamian,et al.  Water transfer as a solution to water shortage: A fix that can Backfire , 2013 .

[8]  Wangwang Tang,et al.  Fluoride and nitrate removal from brackish groundwaters by batch-mode capacitive deionization. , 2015, Water research.

[9]  Linda Zou,et al.  Using mesoporous carbon electrodes for brackish water desalination. , 2008, Water research.

[10]  Yong Liu,et al.  Review on carbon-based composite materials for capacitive deionization , 2015 .

[11]  Yuping Wu,et al.  Enhanced capacitive desalination of MnO2 by forming composite with multi-walled carbon nanotubes , 2016 .

[12]  E. Wang,et al.  Nanostructured materials for water desalination , 2011, Nanotechnology.

[13]  Wangwang Tang,et al.  Faradaic Reactions in Water Desalination by Batch-Mode Capacitive Deionization , 2016 .

[14]  Matthias Wessling,et al.  Single module flow-electrode capacitive deionization for continuous water desalination , 2015 .

[15]  P. M. Biesheuvel,et al.  In situ spatially and temporally resolved measurements of salt concentration between charging porous electrodes for desalination by capacitive deionization. , 2014, Environmental science & technology.

[16]  Volker Presser,et al.  Review on the science and technology of water desalination by capacitive deionization , 2013 .

[17]  Marc A. Anderson,et al.  Capacitive deionization as an electrochemical means of saving energy and delivering clean water. Comparison to present desalination practices: Will it compete? , 2010 .

[18]  Gang Wang,et al.  Ultrasound-assisted preparation of electrospun carbon fiber/graphene electrodes for capacitive deionization: Importance and unique role of electrical conductivity , 2016 .

[19]  Joonwon Lim,et al.  Nitrogen-doped carbon nanotubes and graphene composite structures for energy and catalytic applications. , 2014, Chemical communications.

[20]  Juan G. Santiago,et al.  Capacitive desalination with flow-through electrodes , 2012 .

[21]  Sheng Dai,et al.  Hierarchical ordered mesoporous carbon from phloroglucinol-glyoxal and its application in capacitive deionization of brackish water , 2010 .

[22]  Zheng Ling,et al.  Sulfonated Graphene as Cation‐Selective Coating: A New Strategy for High‐Performance Membrane Capacitive Deionization , 2015 .

[23]  Tingting Yan,et al.  Three-dimensional macroporous graphene architectures as high performance electrodes for capacitive deionization , 2013 .

[24]  Yong Liu,et al.  Facile synthesis of novel graphene sponge for high performance capacitive deionization , 2015, Scientific Reports.

[25]  M. Elimelech,et al.  The Future of Seawater Desalination: Energy, Technology, and the Environment , 2011, Science.

[26]  Volker Presser,et al.  Capacitive deionization in organic solutions: case study using propylene carbonate , 2016 .

[27]  Sungil Jeon,et al.  Ion storage and energy recovery of a flow-electrode capacitive deionization process , 2014 .

[28]  Choonsoo Kim,et al.  Hybrid capacitive deionization to enhance the desalination performance of capacitive techniques , 2014 .

[29]  Peng Liang,et al.  Enhanced desalination performance of membrane capacitive deionization cells by packing the flow chamber with granular activated carbon. , 2015, Water research.

[30]  Chia-Hung Hou,et al.  Improved performance in capacitive deionization of activated carbon electrodes with a tunable mesopore and micropore ratio. , 2015 .

[31]  Xin Gao,et al.  Modification of Carbon Xerogel Electrodes for More Efficient Asymmetric Capacitive Deionization , 2013 .

[32]  Zhuo Sun,et al.  Novel nitrogen doped graphene sponge with ultrahigh capacitive deionization performance , 2015, Scientific Reports.

[33]  Juan G. Santiago,et al.  Two-Dimensional Porous Electrode Model for Capacitive Deionization , 2015 .

[34]  Matthias Wessling,et al.  Batch mode and continuous desalination of water using flowing carbon deionization (FCDI) technology , 2014 .

[35]  Miao Wang,et al.  Capacitive neutralization deionization with flow electrodes , 2016 .

[36]  Volker Presser,et al.  Carbon flow electrodes for continuous operation of capacitive deionization and capacitive mixing energy generation , 2014 .

[37]  Volker Presser,et al.  Water desalination via capacitive deionization : What is it and what can we expect from it? , 2015 .

[38]  N. Liu,et al.  ZIF-8 Derived, Nitrogen-Doped Porous Electrodes of Carbon Polyhedron Particles for High-Performance Electrosorption of Salt Ions , 2016, Scientific Reports.

[39]  Sung Jae Kim,et al.  Direct seawater desalination by ion concentration polarization. , 2010, Nature nanotechnology.

[40]  Kelsey B. Hatzell,et al.  Capacitive deionization concept based on suspension electrodes without ion exchange membranes , 2014 .

[41]  Liyi Shi,et al.  Three-dimensional hierarchical porous carbon with a bimodal pore arrangement for capacitive deionization , 2012 .

[42]  Kelsey B. Hatzell,et al.  Effect of oxidation of carbon material on suspension electrodes for flow electrode capacitive deionization. , 2015, Environmental science & technology.

[43]  Jianmao Yang,et al.  Facile fabrication of porous carbon nanofibers by electrospun PAN/dimethyl sulfone for capacitive deionization , 2015 .

[44]  T. Baumann,et al.  Characterization of Resistances of a Capacitive Deionization System. , 2015, Environmental science & technology.

[45]  L. Zou,et al.  Carbon nanotube/graphene composite for enhanced capacitive deionization performance , 2013 .

[46]  Khalil Abdelrazek Khalil,et al.  Hollow carbon nanofibers as an effective electrode for brackish water desalination using the capacitive deionization process , 2014 .

[47]  François Béguin,et al.  Optimisation of an asymmetric manganese oxide/activated carbon capacitor working at 2 V in aqueous medium , 2006 .

[48]  Y. Gogotsi,et al.  Composite manganese oxide percolating networks as a suspension electrode for an asymmetric flow capacitor. , 2014, ACS applied materials & interfaces.

[49]  Xin Gao,et al.  Surface charge enhanced carbon electrodes for stable and efficient capacitive deionization using inverted adsorption–desorption behavior , 2015 .

[50]  Zhiyong Tang,et al.  Three‐Dimensional Graphene/Metal Oxide Nanoparticle Hybrids for High‐Performance Capacitive Deionization of Saline Water , 2013, Advanced materials.

[51]  Linda Zou,et al.  Novel graphene-like electrodes for capacitive deionization. , 2010, Environmental science & technology.

[52]  Peng Liang,et al.  Coupling ion-exchangers with inexpensive activated carbon fiber electrodes to enhance the performance of capacitive deionization cells for domestic wastewater desalination. , 2013, Water research.

[53]  Liyi Shi,et al.  Three-dimensional graphene-based hierarchically porous carbon composites prepared by a dual-template strategy for capacitive deionization , 2013 .

[54]  P. M. Biesheuvel,et al.  Resistance identification and rational process design in Capacitive Deionization. , 2016, Water research.

[55]  Moon Hee Han,et al.  Desalination via a new membrane capacitive deionization process utilizing flow-electrodes , 2013 .

[56]  Doron Aurbach,et al.  Enhanced Charge Efficiency in Capacitive Deionization Achieved by Surface-Treated Electrodes and by Means of a Third Electrode , 2011 .