In situ anchor of Na2Ti3O7 in nitrogen-rich carbon hollow red blood cell-like structure as a 0D-3D hierarchical electrode material for efficient electrochemical desalination

Zhang, Yingying; Feng, Xiaogeng; Wang, Yuejiao; Shan, Wei; Lou, Zhenning; Xiong, Ying

doi:10.1039/d1sc06476b

Cited by 17 publications

(6 citation statements)

References 44 publications

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“…The C 1s spectrum was fitted into four subpeaks, including C=O, C–O/C–N, C=O, and O=C–O at 283.9, 285.5, 287.1, and 288.9 eV [ 33 ], respectively ( Figure 4 b). In addition, the N 1s spectrum ( Figure 4 c) could be fitted into four subpeaks situated at 397.6, 399.5, 400.9, and 403.2 eV, corresponding to pyridine N, pyrrolic N, graphitic N, and oxidized N [ 34 ], respectively. Pyrrolic N can improve the wettability of carbon materials in an aqueous electrolyte.…”

Section: Resultsmentioning

confidence: 99%

Fe2O3 Embedded in N-Doped Porous Carbon Derived from Hemin Loaded on Active Carbon for Supercapacitors

Yang,

Luo,

Wang

et al. 2023

Molecules

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The high power density and long cyclic stability of N-doped carbon make it an attractive material for supercapacitor electrodes. Nevertheless, its low energy density limits its practical application. To solve the above issues, Fe2O3 embedded in N-doped porous carbon (Fe2O3/N-PC) was designed by pyrolyzing Hemin/activated carbon (Hemin/AC) composites. A porous structure allows rapid diffusion of electrons and ions during charge–discharge due to its large surface area and conductive channels. The redox reactions of Fe2O3 particles and N heteroatoms contribute to pseudocapacitance, which greatly enhances the supercapacitive performance. Fe2O3/N-PC showed a superior capacitance of 290.3 F g−1 at 1 A g−1 with 93.1% capacity retention after 10,000 charge–discharge cycles. Eventually, a high energy density of 37.6 Wh kg−1 at a power density of 1.6 kW kg−1 could be delivered with a solid symmetric device.

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Section: Resultsmentioning

confidence: 99%

Fe2O3 Embedded in N-Doped Porous Carbon Derived from Hemin Loaded on Active Carbon for Supercapacitors

Yang,

Luo,

Wang

et al. 2023

Molecules

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“…), [27,32] sodium cobalt oxides (Na x CoO 2 , NCOs, e. g. Na 0.5 CoO 2 , Na 0.71 CoO 2 , etc. ), [46,47] sodium titanates (Na x Ti y O z , NTOs, e. g. Na 2 Ti 3 O 7 ), [48] transition metal nitrides (TMNs, e. g. TiN), [49] transition metal oxynitrides (TMONs, e. g. Ti x O y N z ), [50] polyanionic phosphates (PAPs) & sodium superionic conductor (NASICON) compounds (e. g. Na 2 FeP 2 O 7 , FePO 4 , NbOPO 4 , NaTi 2 (PO 4 ) 3 , Na 3 V 2 (PO 4 ) 3 , Na 3 Fe 2 (PO 4 ) 3 , etc. ), [51][52][53][54][55][56] transition metal dichalcogenides (TMDs, e. g. MoS 2 , SnS 2 , VS 2 , TiS 2 , etc.…”

Section: Charge Efficiency (λ) and Energy Consumption (E)mentioning

confidence: 99%

MXene‐Based Capacitive Deionization–Strong Competitor Among Faradaic Electrode Systems: Current Status and Future Perspectives

Dubey

2023

ChemistrySelect

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Capacitive deionization (CDI) of brackish water is emerging as a sustainable and energy efficient desalination processes to mitigate the excessive demand of freshwater. Despite that the porous carbon is prime choice in the conventional CDI; its electrostatic interaction‐based limited salt adsorption capacity (SAC, up to 25 mg g−1) has driven the research interest to explore various Faradaic electrodes for attaining maximum SAC (>100 mg g−1) in supplementation with the other desalination metrics. MXene is one of the newly discovered intercalation‐type pseudocapacitive nanostructures, which promised an excellent desalination performance due to its intriguing properties, such as tuneable interlayer spacing, high electrical conductivity, hydrophilicity, and structural integrity. Furthermore, its compositing/heterostructuring with other electro‐active components significantly improves the desalination activity. This article provides a systematic overview of the MXene‐based electrodes utilized in CDI along with the one‐to‐one comparison with other Faradaic systems. Materials design, structure, cell architecture, desalination metrics‐based performance evaluation, and underlying driving forces behind the salty ions removal activity are the main emphasis of discussion to realize MXene‐based efficient CDI desalination. Lastly, the key issues and perspectives of MXene‐based electrode systems are put forward towards new developments and real time implication.

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“…Due to the rapid development of the global economy and serious environmental pollution, the insufficiency of the per capita water resources and the shortage of freshwater resources is increasingly urgent in the 21st century. , Therefore, the development of high efficiency and low energy consumption deionization technology is of great significance in solving the shortage of freshwater resources. At present, the commonly used seawater desalination technology is usually composed of reverse osmosis, electrodialysis, thermal distillation, and so on. , Nevertheless, these processes have some inherent problems, such as complex equipment, secondary pollution, and high costs.…”

Section: Introductionmentioning

confidence: 99%

Prussian Blue/Carbon Nanofiber Amalgamated Conductive Scaffolds for Capacitive Deionization

Wang,

Ma,

Wang

et al. 2024

ACS Appl. Nano Mater.

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Capacitive deionization (CDI) is an emerging technique of seawater desalination technology with high efficiency and low energy consumption. Prussian blue (PB) is considered to be an excellent candidate for CDI intercalation electrode materials due to its spacious three-dimensional ion diffusion channels and available low-cost raw materials. However, the agglomerate tendency and inferior electronic conductivity of PB are the main factors which lead to lower capacity and poor cycling stability. Herein, a Prussian blue nanoparticle/carbon nanofiber (PB/CNF) composite material was synthesized by electrospinning and coprecipitation for capacitive deionization. The conductive CNFs bridged the PB nanoparticles with a size of ca. 50 nm to form a 3D conductive network structure, which can boost the diffusion kinetics of salt ions and electrons simultaneously in the PB/CNF electrode. The ion storage process by the combination of capacitance-controlled and diffusion-controlled behaviors allows the PB/CNF-5 composite to achieve a salt adsorption capacity (SAC) of 51.81 mg g −1 in a 500 mg L −1 NaCl solution at 1.4 V, and it has excellent cycle stability for 80 cycles. Remarkably, it also shows an excellent salt adsorption performance of 97.35 mg g −1 in a 3000 mg L −1 NaCl solution. Overall, the strategy of antiaggregation and enhanced electronic conductivity not only improved the desalination performance of PB nanoparticles but also provided a technical guideline for nanometer-sized materials and helped to facilitate better CDI electrode design.

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In situ anchor of Na₂Ti₃O₇ in nitrogen-rich carbon hollow red blood cell-like structure as a 0D-3D hierarchical electrode material for efficient electrochemical desalination

Abstract: Reasonable design of structure and complementary compounding of electrode materials is helpful to enhance capacitive deionization (CDI) performance. Herein, a novel 0D-3D hierarchical electrode materials containing of Na2Ti3O7 nanoparticles anchored...

Cited by 17 publications

References 44 publications

Fe2O3 Embedded in N-Doped Porous Carbon Derived from Hemin Loaded on Active Carbon for Supercapacitors

Fe2O3 Embedded in N-Doped Porous Carbon Derived from Hemin Loaded on Active Carbon for Supercapacitors

MXene‐Based Capacitive Deionization–Strong Competitor Among Faradaic Electrode Systems: Current Status and Future Perspectives

Prussian Blue/Carbon Nanofiber Amalgamated Conductive Scaffolds for Capacitive Deionization

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