A facile strategy for developing uniform hierarchical Na3V2(PO4)2F3@carbonized polyacrylonitrile multi-clustered hollow microspheres for high-energy-density sodium-ion batteries

Liang, Kang; Wang, Shijie; Zhao, Hongshun; Huang, Xiaobing; Ren, Yurong; He, Zhenjiang; Mao, Jing; Zheng, Junchao

doi:10.1016/j.cej.2021.131780

Cited by 50 publications

(34 citation statements)

References 56 publications

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“…The D peak (∼1351 cm –1 ) and G peak (∼1597 cm –1 ) are associated with the sp 2 -type carbon (graphite-like carbon), the I peak (∼1198 cm –1 ) commonly corresponds to the sp 2 –sp 3 bond (disordered graphitic structure), and the D″ peak (∼1496 cm –1 ) is presented with amorphous carbon. Besides the low-content I band and D″ band, the ratio of the peak intensities of the G-band and D-band ( I G / I D ) of Yeast@NMTP/C is 1.20, more than NMTP/C (1.09), indicating that the yeast-derived carbon has higher graphitization and supports high electronic conductivity. − In addition, the FTIR curves in Figure f reveal the characteristic peaks of [PO 4 ] at 1100 cm –1 , and the characteristic absorption peak at about 650 cm –1 corresponds to the vibration of the M–O (M = Mn, Ti) group . To determine the carbon content of materials tested by TGA in the air atmosphere (Figure g), the result shows that the carbon amount of Yeast@NMTP/C (12.3%) is slightly higher than that of NMTP/C (10.95%), attributed to the additional amorphous carbon derived by yeast cell after calcination.…”

Section: Resultsmentioning

confidence: 99%

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Liu

Huang

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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The sodium super ion conductor (NASICON) structure materials are essential for sodium-ion batteries (SIBs) due to their robust crystal structure, excellent ionic conductivity, and flexibility to regulate element and valence. However, the poor electronic conductivity and inferior energy density caused by the nature of these materials have always been obstacles to commercialization. Herein, using yeast as a template to derive NASICON structure Na 3 MnTi(PO 4 ) 3 (NMTP) materials (noted as Yeast@NMTP/C) is presented. The Yeast@NMTP/C material retains the microsphere morphology of the yeast template and not only controls the particle size (around 2 μm) to shorten the Na + diffusion pathways but also improves the electronic conductivity to optimize the electrochemical kinetics. The Yeast@NMTP/C cathode delivers reversible multielectron redox reactions including Ti 4+/3+ , Mn 3+/2+ , and Mn 4+/3+ and exhibits a high capacity of 108.5 mAh g −1 with a 79.2% capacity retention after 1000 cycles at a 2C rate. The sodium storage mechanism of Yeast@NMTP/C reveals that the addition of Ti 4+/3+ redox plays a key role in improving the Na + diffusion kinetics, and both solid-solution and twophase reactions take place during the desodiation and sodiation process. Additionally, the high-rate and long-span cycle performance of Yeast@NMTP/C at 10C is ascribed to contribute to pseudocapacitance.

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Section: Resultsmentioning

confidence: 99%

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Liu

Huang

Zhao

et al. 2021

ACS Appl. Mater. Interfaces

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“…To study the electrochemical reaction kinetics, cyclic voltammetry (CV), and electrochemical impedance spectroscopy (EIS) tests of samples were carried out. All the CV curves of samples presented in Figure a–c have two characteristic redox peaks of NVPF located at ∼3.7/3.6 and ∼4.2/4.1 V, corresponding to two Na + ion de/intercalation from/into the Na2 and Na1 sites in the NVPF crystal, respectively. ,,,− In addition, the typical redox peaks of NVP also appear at about 3.4/3.3 V, ,,,, which further verifies the existence of NVP impurity, and recent studies have also confirmed that NVP impurity is produced due to the fluorine loss in NVPF synthesis. ,, For all the three NVPF samples, except the first CV profiles, the second agrees well with the third, indicating that as a cathode material for NIBs, NVPF has good electrochemical reversibility. Significantly, the second CV profile of NVPF@C-T agrees better with the third, so the NVPF@C-T electrode has the best electrochemical reversibility.…”

Section: Results and Discussionmentioning

confidence: 56%

Synthesis and Electrochemical Performance of Uniform Carbon-Coated Na₃V₂(PO₄)₂F₃ Using Tannic Acid as a Chelating Agent and Carbon Source

Jiang

Zhang

Cui

et al. 2022

ACS Appl. Energy Mater.

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Carbon-coated Na3V2(PO4)2F3 (NVPF@C) composites are prepared using tannic acid as a chelating agent and carbon source via a sol–gel process-assisted solid-state reaction for the first time. When introducing tannic acid in two steps, a complete and uniform carbon coating layer can be successfully fabricated because the tannic acid added in the second step can repair the discontinuous and uneven coating obtained by the first coating. This uniform carbon layer can not only effectively improve the electronic conductivity of NVPF and accelerate Na+-ion diffusion but also prevent NVPF from being corroded by the electrolyte. As a result, the carbon-coated NVPF composite prepared by introducing tannic acid in two steps has a higher initial capacity (124.5 mAh g–1 at 0.2 C) and a better cycle stability (94.8% capacity retention ratio over 300 cycles at 10 C) compared to pristine NVPF and another carbon-coated NVPF composite prepared by introducing tannic acid in one step. Therefore, this work not only finds a cheap chelating agent for the sol–gel process but also develops an effective strategy for coating materials with poor electronic conductivity.

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“…On basis of a comprehensive summary (Figure d), to the best of our knowledge, this is the best rate capability among recently reported NVPF/C composites for SIBs, ,,,− further demonstrating its advancement for ultrafast Na storage. Remarkably, the cycling performance of NVPFC-NS is outstanding as well.…”

Section: Resultsmentioning

confidence: 60%

Amylopectin-Assisted Fabrication of In Situ Carbon-Coated Na₃V₂(PO₄)₂F₃ Nanosheets for Ultra-Fast Sodium Storage

Zhang

Song

Tang

et al. 2022

ACS Appl. Mater. Interfaces

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Na3V2(PO4)2F3 is one of the most studied polyanion type cathode materials for sodium-ion batteries (SIBs) and offers great promises. However, the inferior rate capability induced by its sluggish diffusion of electrons and ions greatly limits the practical application of electrode materials in SIBs. Herein, we develop an efficient method to fabricate in situ carbon-coated Na3V2(PO4)2F3 nanosheets by using cost-effective amylopectin. The amylopectin not only could induce the nucleation of Na3V2(PO4)2F3 along its backbone to form a 2D nanostructure, but also act as a source of amorphous carbon for in situ coating on the active material surface. The composite exhibits extraordinary rate capability (104 mA h g–1 at 40 C, 51 mA h g–1 at 150 C) and desirable cycling stability. Such satisfactory achievements, especially the superior rate performance, should be ascribed to its unique 2D nanostructure which shortens the Na+ diffusion length, and the in situ carbon coating endows the composites with effective electron transport. Even applied to full cells, the obtained devices still display an exceptionally high energy density (94.8 W h kg–1), high power density (7295 W kg–1), and excellent cyclic stability.

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A facile strategy for developing uniform hierarchical Na3V2(PO4)2F3@carbonized polyacrylonitrile multi-clustered hollow microspheres for high-energy-density sodium-ion batteries

Cited by 50 publications

References 56 publications

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Synthesis and Electrochemical Performance of Uniform Carbon-Coated Na₃V₂(PO₄)₂F₃ Using Tannic Acid as a Chelating Agent and Carbon Source

Amylopectin-Assisted Fabrication of In Situ Carbon-Coated Na₃V₂(PO₄)₂F₃ Nanosheets for Ultra-Fast Sodium Storage

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A facile strategy for developing uniform hierarchical Na3V2(PO4)2F3@carbonized polyacrylonitrile multi-clustered hollow microspheres for high-energy-density sodium-ion batteries

Cited by 50 publications

References 56 publications

Yeast Template-Derived Multielectron Reaction NASICON Structure Na3MnTi(PO4)3 for High-Performance Sodium-Ion Batteries

Yeast Template-Derived Multielectron Reaction NASICON Structure Na3MnTi(PO4)3 for High-Performance Sodium-Ion Batteries

Synthesis and Electrochemical Performance of Uniform Carbon-Coated Na3V2(PO4)2F3 Using Tannic Acid as a Chelating Agent and Carbon Source

Amylopectin-Assisted Fabrication of In Situ Carbon-Coated Na3V2(PO4)2F3 Nanosheets for Ultra-Fast Sodium Storage

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About

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Yeast Template-Derived Multielectron Reaction NASICON Structure Na₃MnTi(PO₄)₃ for High-Performance Sodium-Ion Batteries

Synthesis and Electrochemical Performance of Uniform Carbon-Coated Na₃V₂(PO₄)₂F₃ Using Tannic Acid as a Chelating Agent and Carbon Source

Amylopectin-Assisted Fabrication of In Situ Carbon-Coated Na₃V₂(PO₄)₂F₃ Nanosheets for Ultra-Fast Sodium Storage