Exploration of Energy Storage Materials for Water Desalination via Next-Generation Capacitive Deionization

Shi, Wenhui; Gao, Xinlong; Mao, Jing; Qian, Xin; Liu, Wenxian; Wu, Fangfang; Li, Haibo; Zeng, Zhiyuan; Shen, Jiangnan; Cao, Xiehong

doi:10.3389/fchem.2020.00415

Cited by 19 publications

(4 citation statements)

References 103 publications

(87 reference statements)

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“…[6,7] In the past few decades, capacitive desalination (CDI) has drawn great attentions due to the merits of high desalination capacity, low driven energy consumption, environmental-benign, and easy operation. [8][9][10][11][12][13][14][15] In the early stage of CDI development, the salty ions are stored within the electrical double layer (EDL), which is defined as the interface between the stream and the electrode. The CDI process is triggered by introducing the electrostatic force with a low direct electrical potential (<2 V).…”

Section: Introductionmentioning

confidence: 99%

Exploration of the Exceptional Capacitive Deionization Performance of CoMn₂O₄ Microspheres Electrode

Liu

2022

Energy & Environ Materials

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The “battery type” inorganic electrode has been demonstrated the highly efficient sodium ion intercalation capacity for capacitive deionization. In this work, the CoMn2O4 (CMO) microspheres with porous core‐shell structure are prepared via co‐precipitation and followed by annealing. The effects of annealing temperatures on the morphology, pore structure, valence state, and electrochemical behavior of CMO are explored. As electrode for capacitive deionization, the salt removal capacity and current efficiency of optimized AC || CMO device reaches up to 60.7 mg g−1 and 97.6%, respectively, and the capacity retention rate is 74.1% after 50 cycles. Remarkably, both the in‐situ X‐ray diffraction and ex‐situ X‐ray diffraction analysis features that the intercalation/de‐intercalation of sodium ions are governed by (103) and (221) crystal planes of CMO. Accordingly, the density functional theory calculations realize that the adsorption energies of Na+ onto (103) and (221) crystal planes are higher than that of any other crystal planes, manifesting the priorities in adsorption of sodium atoms. Furthermore, the X‐ray photoelectron spectra of pristine and post‐CMO electrode highlights that the reversible conversion of Mn3+/Mn4+ couple is resulted from the intercalation/de‐intercalation of Na+, while this is irreversible for Co3+/Co2+ couple. Beyond that, the CMO electrode has been proven the selectivity removal of Na+ over K+ and Mg2+ in a multi‐cation stream.

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Section: Introductionmentioning

confidence: 99%

Exploration of the Exceptional Capacitive Deionization Performance of CoMn₂O₄ Microspheres Electrode

Liu

2022

Energy & Environ Materials

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“…The existing and well-developed desalination techniques, including thermal distillation and reverse osmosis, are not affordable everywhere due to high energy consumption and operational costs. Capacitive deionization (CDI) is a promising alternative technology with higher energy efficiency and lower cost 2 , 3 .…”

Section: Introductionmentioning

confidence: 99%

Electrochemical investigation of carbon paper/ZnO nanocomposite electrodes for capacitive anion capturing

Chalangar

Björk

Pettersson

2022

Sci Rep

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In this work, we demonstrate an effective anion capturing in an aqueous medium using a highly porous carbon paper decorated with ZnO nanorods. A sol–gel technique was first employed to form a thin and compact seed layer of ZnO nanoparticles on the dense network of carbon fibers in the carbon paper. Subsequently, ZnO nanorods were successfully grown on the pre-seeded carbon papers using inexpensive chemical bath deposition. The prepared porous electrodes were electrochemically investigated for improved charge storage and stability under long-term operational conditions. The results show effective capacitive deionization with a maximum areal capacitance of 2 mF/cm2, an energy consumption of 50 kJ per mole of chlorine ions, and an excellent long-term stability of the fabricated C-ZnO electrodes. The experimental results are supported by COMSOL simulations. Besides the demonstrated capacitive desalination application, our results can directly be used to realize suitable electrodes for energy storage in supercapacitors.

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“…CDI systems have many similarities with electrochemical energy storage devices. [ 39–45 ] Inspired by battery materials, Lee et al. first applied a typical cathode materials of sodium ion batteries in CDI and proposed a novel hybrid CDI system.…”

Section: Introductionmentioning

confidence: 99%

Achieving Enhanced Capacitive Deionization by Interfacial Coupling in PEDOT Reinforced Cobalt Hexacyanoferrate Nanoflake Arrays

et al. 2021

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Capacitive deionization (CDI) as a novel energy and cost‐efficient water treatment technology has attracted increasing attention. The recent development of various faradaic electrode materials has greatly enhanced the performance of CDI as compared with traditional carbon electrodes. Prussian blue (PB) has emerged as a promising CDI electrode material due to its open framework for the rapid intercalation/de‐intercalation of sodium ions. However, the desalination efficiency, and durability of previously reported PB‐based materials are still unsatisfactory. Herein, a self‐template strategy is employed to prepare a Poly(3,4‐ethylenedioxythiophene) (PEDOT) reinforced cobalt hexacyanoferrate nanoflakes anchored on carbon cloth (denoted as CoHCF@PEDOT). With the high conductivity and structural stability achieved by coupling with a thin PEDOT layer, the as‐prepared CoHCF@PEDOT electrode exhibits a high capacity of 126.7 mAh g−1 at 125 mA g−1. The fabricated hybrid CDI cell delivers a high desalination capacity of 146.2 mg g−1 at 100 mA g−1, and good cycling stability. This strategy provides an efficient method for the design of high‐performance faradaic electrode materials in CDI applications.

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Exploration of Energy Storage Materials for Water Desalination via Next-Generation Capacitive Deionization

Cited by 19 publications

References 103 publications

Exploration of the Exceptional Capacitive Deionization Performance of CoMn₂O₄ Microspheres Electrode

Exploration of the Exceptional Capacitive Deionization Performance of CoMn₂O₄ Microspheres Electrode

Electrochemical investigation of carbon paper/ZnO nanocomposite electrodes for capacitive anion capturing

Achieving Enhanced Capacitive Deionization by Interfacial Coupling in PEDOT Reinforced Cobalt Hexacyanoferrate Nanoflake Arrays

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Exploration of Energy Storage Materials for Water Desalination via Next-Generation Capacitive Deionization

Cited by 19 publications

References 103 publications

Exploration of the Exceptional Capacitive Deionization Performance of CoMn2O4 Microspheres Electrode

Exploration of the Exceptional Capacitive Deionization Performance of CoMn2O4 Microspheres Electrode

Electrochemical investigation of carbon paper/ZnO nanocomposite electrodes for capacitive anion capturing

Achieving Enhanced Capacitive Deionization by Interfacial Coupling in PEDOT Reinforced Cobalt Hexacyanoferrate Nanoflake Arrays

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Exploration of the Exceptional Capacitive Deionization Performance of CoMn₂O₄ Microspheres Electrode

Exploration of the Exceptional Capacitive Deionization Performance of CoMn₂O₄ Microspheres Electrode