Heterointerface optimization in a covalent organic framework-on-MXene for high-performance capacitive deionization of oxygenated saline water

Zhang, Shuaihua; Xu, Xingtao; Liu, Xiaohong; Yang, Qian; Shang, Ningzhao; Zhao, Xiaoxian; Zang, Xiaohuan; Wang, Chun; Wang, Zhi; Shapter, Joseph G.; Yamauchi, Yusuke

doi:10.1039/d1mh01882e

Cited by 107 publications

(51 citation statements)

References 47 publications

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“…[ 3,4 ] However, traditional carbon electrodes exhibit poor desalination capacity (less than 20 mg NaCl g −1 ) and sluggish rate capability (slower than 1 mg NaCl g −1 min −1 ). [ 5 ] Other non‐carbon candidates, including transition metal oxide (e.g., TiO 2 , Na x MnO 2 , V 2 O 5 , MnO 2 ), [ 6,7,8 ] Prussian blue analogs (e.g., Na 2 CoFe(CN) 6 , FeFe(CN) 6 , Na 2 CuFe(CN) 6 ), [ 9,10 ] polyanionic phosphates (e.g., amorphous FePO 4 , NaTi 2 (PO 4 ) 3 , Na 3 V 2 (PO 4 ) 3 ), [ 11,12 ] MXenes (e.g., Ti 3 C 2 T x ), [ 13 ] and transitional metal dichalcogenides (e.g., MoS 2 , TiS 2 ), [ 8,14 ] usually suffer from high material cost, low intrinsic conductivity, and poor cycling durability resulting from significant volume change, leading to being far from practical application in CDI process. As a consequence, it is very urgent to exploit high‐performance electrodes for advancing CDI systems.…”

Section: Introductionmentioning

confidence: 99%

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Liang

Liu

Zhang

et al. 2022

Adv Funct Materials

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Developing high‐performance defect‐rich carbon materials with abundant accessible active sites is exceedingly vital for electrochemical water desalination, but this still remains a significant challenge. Herein, a reverse‐defect‐engineering strategy is reported to synthesize high edge‐nitrogen‐doped nanotube‐like carbon through the annealing process of protonated g‐C3N4 under H2 atmosphere. The hydrogen bonds interaction between the proton and nitrogen atoms performs a crucial role in regulating nitrogen configurations. The nitrogen‐doped carbon obtained from HCl pretreatment (HCl‐NC) reduces the proportion of graphitic N and exhibits a high ratio of pyrrolic N to pyridinic N. Thus, the resulting synergetic structure of high edge‐type N and small graphitic carbon nanodomains ensures more accessible active sites and fast charge‐transfer kinetics simultaneously, contributing to high desalination capacity (100.3 mg g−1 at 1.2 V), fast time‐average specific adsorption rate (1.7 mg g−1 min−1), low energy consumption (82.9 kJ molNaCl−1), and superior cyclic stability (no signs of performance decay after long‐term cycling). The Na+‐intercalation mechanism and structure‐response relationship of HCl‐NC are revealed by the electrochemical quartz crystal microbalance with dissipation monitoring and density functional theory calculations, respectively. This study provides a novel idea to modulate the nanotube‐like, nitrogen‐containing configurations for engineering carbon nanomaterials for advanced electrochemical applications.

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Section: Introductionmentioning

confidence: 99%

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Liang

Liu

Zhang

et al. 2022

Adv Funct Materials

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“…

Porous nanomaterials are one of the most attractive classes of materials for the investigation of applications in energy storage, water treatment, adsorption/separation, and catalysis. [1][2][3][4][5] A variety of processing/ synthetic methods have been developed to extend the class of porous nanomaterials by establishing morphology and structure control. [6][7][8][9] Of these methods, electrospun carbonaceous nanofibers (ECNFs) are an important subfamily of nanostructured carbons having several advantageous properties, including good mechanical flexibility, controllable morphology, high yield ratio, and environmental friendliness, [10][11][12] leading to their investigation in recent years as electrode materials for flexible supercapacitors.

…”

mentioning

confidence: 99%

Embedding Metal–Organic Frameworks for the Design of Flexible Hybrid Supercapacitors by Electrospinning: Synthesis of Highly Graphitized Carbon Nanofibers Containing Metal Oxide Nanoparticles

Zhu²,

et al. 2022

Small Structures

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Electrospun carbonaceous fibers have emerged as promising electrode materials for application in energy storage devices. However, their relatively poor electrical conductivity (due to their amorphous carbon structures) and low capacitive performance lead to poor prospects for their further application. Herein, a universal synthesis of highly graphitized carbon nanofibers, containing various metal oxide nanoparticles (e.g., Fe2O3, NiO), by the pyrolysis of metal–organic framework (MOF)‐embedded electrospun nanofibers, is reported. The resulting carbon nanofibers exhibit large mesopore volumes, contain large quantities of Faradic metal oxide nanoparticles, and are highly graphitized. The fibers also have excellent mechanical flexibility, provide fast ion transfer characteristics, and a large pseudocapacitance combined with excellent electrical conductivity, leading to large specific capacitances. Consequently, asymmetric flexible hybrid supercapacitors assembled from Fe2O3‐embedded highly graphitized carbon nanofibers (FOCNF) and NiO‐embedded highly graphitized carbon nanofibers (NOCNF) exhibit a high energy density of 43.1 Wh kg−1 at a power density of 412.5 W kg−1 and possess excellent flexibility (capacitance retention of 94.4% at 180° bending and 96.2% at 30° twisting) with superior cycling stability. This strategy provides a new MOF‐based approach for the design and synthesis of multifunctional flexible carbonaceous materials and might lead to their further application in flexible energy storage devices.

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“…The detected Ti−O peak (458.5 eV) associated with the formation of TiO 2 can be ascribed to the possible interaction between MXene and the quinone groups of the AQ‐COF in the MXene@COF‐15 heterostructure (Figure S4a). The C 1s spectra of MXene@COF‐15 heterostructure can be divided to five peaks centered at 281.8, 282.3, 284.8, 286.2, and 287.0 eV, assigned to the C−Ti, Ti−C−O, C−C, C−O, and C=O bonds, respectively (Figure S4b) [39] . The doublet peak at 399.7 and 403.2 eV in N 1s spectra of MXene@COF‐15 heterostructure could be assigned to the C−N and N−O units, respectively, which can also be detected in the N 1s spectra of AQ‐COF (Figure S4c and S4d) [40] .…”

Section: Resultsmentioning

confidence: 99%

Covalent‐Induced Heterostructure of Covalent‐Organic Frameworks and MXene as Advanced Electrodes with Motivated Pseudocapacitance Performance

et al. 2022

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Heterostructures based on covalent organic frameworks (COFs) and conductive materials have attracted more attentions to effectively apply COF‐related materials for supercapacitor. Here, the as‐prepared amino‐modified Ti3C2 MXene nanosheets are adopted to support the in‐situ growth of anthraquinone‐based COFs (AQ‐COF) to fabricate the heterostructures of COFs uniformly dispersed on surface of MXene, based on the covalent interaction between terminal C=O groups of COFs and amino units of MXene. Besides, the morphology and porous structures of COF@MXene heterostructures are optimized by controlling the amounts of MXene nanosheets. Combining the superiority from the two‐dimensional structure with high conductivity of MXene and porous structure with abundant redox‐active groups inherited from AQ‐COF, the COF@MXene‐15 heterostructure electrode delivers large surface area with optimal porous structures, leading to the maximally‐activated C=O units for charge‐storage and capacitance‐controlled electrochemical kinetics. Improved specific capacitance (290 F g−1 at 0.5 A g−1) and rate capability can be achieved for the COF@MXene‐15 heterostructure as the electrode for supercapacitor in Na2SO4 electrolyte. It is the first time to report the heterostructure of COFs and MXene as the electrode for supercapacitor, and this work would promote further application of COFs and related materials for other energy‐storage systems.

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Heterointerface optimization in a covalent organic framework-on-MXene for high-performance capacitive deionization of oxygenated saline water

Abstract: Capacitive deionization (CDI) provides a promising option to provide affordable freshwater with simultaneously storing energy, but its scale application is usually limited owing to the poor performance of conventional materials...

Cited by 107 publications

References 47 publications

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

A Reverse‐Defect‐Engineering Strategy toward High Edge‐Nitrogen‐Doped Nanotube‐Like Carbon for High‐Capacity and Stable Sodium Ion Capture

Embedding Metal–Organic Frameworks for the Design of Flexible Hybrid Supercapacitors by Electrospinning: Synthesis of Highly Graphitized Carbon Nanofibers Containing Metal Oxide Nanoparticles

Covalent‐Induced Heterostructure of Covalent‐Organic Frameworks and MXene as Advanced Electrodes with Motivated Pseudocapacitance Performance

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