Atomic substituents effect on boosting desalination performances of Zn-doped NaxCoO2

Zhou, Ruijuan; Li, Jiaxuan; Wei, Wenhui; Li, Xiaoman; Luo, Min

doi:10.1016/j.desal.2020.114695

Cited by 17 publications

(13 citation statements)

References 53 publications

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“…Furthermore, to realize high-performance CDI application, intensive efforts have been focused on Na-ion capture pseudocapacitive electrode materials especially sodium metal oxides/phosphates and various TMCs (e.g., sulfides, nitrides, carbides, and oxides) in the past few years, while little attention has been paid to Cl-ion capture electrodes. [14,21,[41][42][43][44][45][46] Recently, several amazing faradaic alternatives (e.g., AgCl, Bi NCs@CNBs, CoFeCl-layered double hydroxide (LDH), and ZnCo-Cl LDH) to the widely used AC electrodes have been investigated. These alternatives demonstrate prominent Cl ion removal behaviors owing to the efficient Cl ion exchange-promoted redox conversion process.…”

Section: Introductionmentioning

confidence: 99%

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Zhao

Huang

et al. 2022

Advanced Science

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Recently, the rational design and development of efficient faradaic deionization electrodes with high theoretical capacitance, natural abundance, and attractive conductivity have shown great promise for outstanding capacitive deionization (CDI)‐based desalination applications. Herein, the construction of novel FeOOH hybrid heterostructures with Na and Cl dopants (e.g., Na‐FeOOH and Cl‐FeOOH) via a robust hydrothermal strategy is reported, and an asymmetric CDI cell (Na‐FeOOH//Cl‐FeOOH) comprising Na‐FeOOH and Cl‐FeOOH working as the cathode and anode, respectively, is assembled. The multiple coupling effects of the specific structural features (e.g., enriched porosity, hierarchical pore alignment, and highly open crystalline framework), enhanced electrochemical conductivity, and optimized ion‐transfer property endow the FeOOH hybrid electrode with improved electrochemical performance. Impressively, the Na‐FeOOH//Cl‐FeOOH cell demonstrates a superior salt adsorption capacity (SACNaCl) of 35.12 mg g−1 in a 500 mg L−1 NaCl solution, a faster removal rate, and remarkable cycling stability. Moreover, the pseudocapacitive removal mechanism from the synergetic contribution of the Na‐FeOOH cathode and Cl‐FeOOH anode account for the significant desalination promotion of the Na‐FeOOH//Cl‐FeOOH cell.

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Section: Introductionmentioning

confidence: 99%

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Zhao

Huang

et al. 2022

Advanced Science

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“…The SAC of 104.29 mg/g was attributed to highly capacitive and polar surface of the mesoporous rGO/TiONTs composite. Moreover, Zhou, Li, et al (2020) developed Zn doped Na x CoO 2 exhibiting SAC of 125.3 mg/g, which was ascribed to improved electrical and Na‐ion conductivity with the introduction of Zn 2+ ions. Recently, Chen, Xu, Wan, et al (2021) reported the synthesis of carbon‐incorporated 2D Fe 3 O 4 (2D‐Fe 3 O 4 /C) nanoflakes with solvothermal method and pyrolysis process under inert atmosphere.…”

Section: Materials Perspectivementioning

confidence: 99%

“…The electrosorption performance of carbon‐based materials is governed by electrical double layers (EDLs). The electrical double layers and co‐ion expulsion limit the electrosorption in carbon‐based materials (Zhou, Li, et al, 2020, p. 2). The limitations of carbon‐based materials have been resolved by employing faradaic materials involving redox active surfaces (Su et al, 2017), redox active electrolytes (Lee et al, 2018), and ion insertion materials (Lee et al, 2017; Srimuk et al, 2016).…”

Section: Introductionmentioning

confidence: 99%

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Datar

Mane

Jha

2022

Water Environment Research

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Capacitive deionization is an emerging and rapidly developing electrochemical technique for water desalination across the globe with exponential growth in publications. There are various architectures and materials being explored to obtain utmost electrosorption performance. The symmetric architectures consist of the same material on both electrodes, while asymmetric architectures have electrodes loaded with different materials. Asymmetric architectures possess higher electrosorption performance as compared with that of symmetric architectures owing to the inclusion of either faradaic materials, redox‐active electrolytes, or ion specific pre‐intercalation material. With the materials perspective, faradaic materials have higher electrosorption performance than carbon‐based materials owing to the occurrence of faradaic reactions for electrosorption. Moreover, the architecture and material may be tailored in order to obtain desired selectivity of the target component and heavy metal present in feed water. In this review, we describe recent developments in architectures and materials for capacitive deionization and summarize the characteristics and salt removal performances. Further, we discuss recently reported architectures and materials for the removal of heavy metals and radioactive materials. The factors that affect the electrosorption performance including the synthesis procedure for electrode materials, incorporation of additives, operational modes, and organic foulants are further illustrated. This review concludes with several perspectives to provide directions for further development in the subject of capacitive deionization. Practitioner Points Capacitive deionization (CDI) is a rapidly developing electrochemical water desalination technique with exponential growth in publications. Faradaic materials have higher salt removal capacity (SAC) because of reversible redox reactions or ion‐intercalation processes. Combination of CDI with other techniques exhibits improved selectivity and removal of heavy metals. Operational parameters and materials properties affect SAC. In future, comprehensive experimentation is needed to have better understanding of the performance of CDI architectures and materials.

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“…For example, doped Zn 2+ ions can improve the electron conductivity, and doped Ca 2+ ions can enhance the capacity. 36,37 However, simultaneously boosting the ion and electron transfer remains a major challenge. In order to enhance the specific capacity and improve the cycling stability of Na x MO 2 , preintercalation of the electrode has been adopted as an effective method to improve the electrochemical performance by introducing the guest species including inorganic ion or organic molecules into the host interlayer.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Previous works have demonstrated that desalination capacity can be enhanced by controlling the sodium content through chemical and electrochemical preactivation. , Our team has proved that a doped heteroatom strategy between the interlayer and slab is an effective way to improve the electrochemical characteristics for CDI application. For example, doped Zn 2+ ions can improve the electron conductivity, and doped Ca 2+ ions can enhance the capacity. , However, simultaneously boosting the ion and electron transfer remains a major challenge. In order to enhance the specific capacity and improve the cycling stability of Na x MO 2 , preintercalation of the electrode has been adopted as an effective method to improve the electrochemical performance by introducing the guest species including inorganic ion or organic molecules into the host interlayer .…”

Section: Introductionmentioning

confidence: 99%

Enhanced Desalination Capacity and Stability of Alkylamine-Modified Na_0.71CoO₂ for Capacitive Deionization

Zhou

Wang

Wei

et al. 2021

ACS Sustainable Chem. Eng.

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Simultaneously regulating the physical properties and chemical environment of interlayer is a critical need for enhancing the capacity and stability of layered electrode materials in energy and environmental applications. Herein, the intercalation of n-alkylamine with different alkyl chain lengths to the structure of layered Na 0.71 CoO 2 (NCO) for application in capacitive deionization is reported. The amine intercalation via acid−base reaction routes allows the expansion of layer spacing of NCO, increase the active site of Na + ions storage, reduce the diffusion energy barrier of Na + ions, improve the electronic conductivity, and suppress the structural deformation of NCO upon the desodiation/sodiation processes. Benefiting from these features, the n-propylamine-intercalated NCO delivered a high capacity of 88.9 mg g −1 and a comparable energy consumption of 0.54 kW h kg −1 . A combination of mechanism analyses and density functional theory calculations demonstrated that the synergistic effects of electrical and ionic conductivity account for the enhanced properties. Our work provides a strategy for engineering the interlayer to enable high capacity and cycling stability, which offers guidance for the design of preintercalated electrode materials.

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Atomic substituents effect on boosting desalination performances of Zn-doped NaxCoO2

Cited by 17 publications

References 53 publications

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Enhanced Desalination Capacity and Stability of Alkylamine-Modified Na_0.71CoO₂ for Capacitive Deionization

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Atomic substituents effect on boosting desalination performances of Zn-doped NaxCoO2

Cited by 17 publications

References 53 publications

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Efficient and Durable Sodium, Chloride‐doped Iron Oxide‐Hydroxide Nanohybrid‐Promoted Capacitive Deionization of Saline Water via Synergetic Pseudocapacitive Process

Recent progress in materials and architectures for capacitive deionization: A comprehensive review

Enhanced Desalination Capacity and Stability of Alkylamine-Modified Na0.71CoO2 for Capacitive Deionization

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Enhanced Desalination Capacity and Stability of Alkylamine-Modified Na_0.71CoO₂ for Capacitive Deionization