In-situ constructing Na3V2(PO4)2F3/carbon nanocubes for fast ion diffusion with high-performance Na+-storage

Li, Yunsha; Liang, Xinghui; Chen, Guilin; Zhong, Wentao; Deng, Qiang; Zheng, Fenghua; Yang, Chenghao; Liu, Meilin; Hu, Junhua

doi:10.1016/j.cej.2019.123952

Cited by 64 publications

(38 citation statements)

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“…Generally, the b-value close to 0.5 indicates an ion diffusion control step, while the b-value of about 1.0 represents a surface adsorption/desorption control process. [11,36] As demonstrated in Figure S27, Supporting 1:…”

Section: (4 Of 11)mentioning

confidence: 96%

“…The polarization demonstrated by the Li-doped cathode materials is less than that of NMO, indicating highly reversible reactions. [36] The initial discharge capacities of the four samples are similar (≈116 mA h g -1 ), but the spinel LiMn 2 O 4 with more Na-ion diffusion pathways would induce more active sites for the migration of Na + , thereby increasing the capacity during the first few cycles. [37] Figure 3a shows the differential capacity (dQ/dV) plots of the first four cycles of NMO in Na-ion half cells which can be deconvoluted into more than six reversible redox peaks, involving multi-step Mn 3+ /Mn 4+ reactions, consistent with the charge/discharge profiles and cyclic voltammetry (CV) curves ( Figure S16, Supporting Information).…”

Section: (4 Of 11)mentioning

confidence: 99%

“…For N[ML]O sample, in which Li ions are doped into the Mn vacancies and used as pillars, the cycling stability boosts to 82.6% after 300 cycles, but its capacity is relatively poor (88.3 mA h g -1 (Figure 3f) show several plateaus and steps, signaling various phase transformations, while the stable voltage platforms indicate low electrochemical polarization and excellent capacity retention. [36] Moreover, the [NL][ML]O demonstrates an optimal Coulombic efficiency of 99.8%, indicating that effective Li substitution not only improves the structural stability and capacity output of Na 0.44 MnO 2 materials but also enhances the reversibility of the cell reactions (Figure 3g).…”

Section: (4 Of 11)mentioning

confidence: 99%

“…Here, k 1 v represents the capacitive contribution, while k 2 v 1/2 represents the diffusion-controlled contribution, where k 1 and k 2 are constants that can be obtained by fitting i/v 1/2 and v 1/2 . [11,16] The quantitative calculation of the capacitance contribution of the Moreover, the average D Na can also be calculated using the Randles-Sevcik relation based on the best linear fit of the i p (peak current) and v 1/2 (square root of the scan rate), [16,36] as shown in Figure 5d and Figure S30, Supporting Information. The higher the slope, the greater the D Na .…”

Section: (4 Of 11)mentioning

confidence: 99%

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Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Liang

Kim

Jung

et al. 2020

Adv Funct Materials

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Sodium manganese oxides as promising cathode materials for sodium‐ion batteries (SIBs) have attracted interest owing to their abundant resources and potential low cost. However, their practical application is hindered due to the manganese disproportionation associated with Mn3+, resulting in rapid capacity decline and poor rate capability. Herein, a Li‐substituted, tunnel/spinel heterostructured cathode is successfully synthesized for addressing these limitations. The Li dopant acts as a pillar inhibiting unfavorable multiphase transformation, improving the structural reversibility, and sodium storage performance of the cathode. Meanwhile, the tunnel/spinel heterostructure provides 3D Na+ diffusion channels to effectively enhance the redox reaction kinetics. The optimized [Na0.396Li0.044][Mn0.97Li0.03]O2 composite delivers an excellent rate performance with a reversible capacity of 97.0 mA h g–1 at 15 C, corresponding to 82.5% of the capacity at 0.1 C, and a promising cycling stability over 1200 cycles with remarkable capacity retention of 81.0% at 10 C. Moreover, by combining with hard carbon anodes, the full cell demonstrates a high specific capacity and favorable cyclability. After 200 cycles, the cell provides 105.0 mA h g–1 at 1 C, demonstrating the potential of the cathode for practical applications. This strategy might apply to other sodium‐deficient cathode materials and inform their strategic design.

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Section: (4 Of 11)mentioning

confidence: 96%

Section: (4 Of 11)mentioning

confidence: 99%

Section: (4 Of 11)mentioning

confidence: 99%

Section: (4 Of 11)mentioning

confidence: 99%

See 2 more Smart Citations

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Liang

Kim

Jung

et al. 2020

Adv Funct Materials

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“…The NVPF nano‐cubes with the in‐situ carbon coating were prepared by the facile‐modified solid phase synthesis, which eases the Na diffusion and improves the charge transfer kinetics. The nano‐cubes display a capacity of 107.7 mAh/g at 10 C while the first charging capacity is 137.4 mAh/g (Y. Li, Liang, et al, 2020). Yang et al synthesized the nitrogen doped graphene encapsulated NVPF with the sol‐gel route, which shows a capacity of 108.6 mAh/g at 5 C and 101.6 mAh/g at 10 C with a capacity retention of 96.5% (X. Yang, Wang, & Zhen, 2020).…”

Section: Phosphate Cathode Materialsmentioning

confidence: 99%

A comprehensive review on recent advances of polyanionic cathode materials in Na‐ion batteries for cost effective energy storage applications

Sapra

Pati

Dwivedi

et al. 2021

WIREs Energy & Environment

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Sustainable and efficient energy storage devices are crucial to meet the soaring global energy demand. In this context, Na‐ion batteries (NIBs) have emerged as one of the excellent alternatives to the Li‐ion batteries, due to the uniform geographical distribution, abundance, cost‐effectiveness, comparable operating voltage as well as similar intercalation chemistry. However, due to larger size of Na and other related issues, a subtle strategy of research is required for the development of electrode materials for NIBs to enhance overall electrochemical performance. Here, we provide a comprehensive review on recent advances of polyanionic cathode materials for NIBs for cost effective and large scale energy storage applications. Owing to their great thermal and chemical stability, high redox potential (inductive effect), and rich structural diversity, polyanionic cathodes have been considered potential candidates in recent years. We cover a large number of polyanionic materials and conclude with the strategies to improve the energy and power density of NIB. This article is categorized under: Energy Research & Innovation > Science and Materials Energy and Development > Science and Materials Energy and Transport > Science and Materials

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Localized Electron Density Redistribution in Fluorophosphate Cathode: Dangling Anion Regulation and Enhanced Na‐Ion Diffusivity for Sodium‐Ion Batteries

Wang

Kang

et al. 2021

Adv Funct Materials

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Polyanionic transition metal polyphosphate (TMPO)-type Na 3 V 2 (PO 4 ) 2 O 2 F (NVPO 2 F) is promising as cathode for large-scale sodium-ion batteries (SIBs) on account of its considerable capacity and highly stable structure. However, the redox of transition metal and phase transitions along with the (de) intercalation of Na + lead to its slow kinetics and inferior rate performance. Herein, chlorine (Cl) is applied as a heteropical dopant to obtain Cl-doped NVPO 2 F (NVPO 2−x Cl x F) cathode material for SIBs. Density functional theory investigation reveals that Cl doping tunes the localized electronic density and structure in NVPO 2 F lattice, causing the electron redistribution on vanadium center and dangling anions. Hence, the NVPO 2−x Cl x F cathode exhibits a revised redox behavior of vanadium for Na + extraction/insertion, increases Na + diffusion rate, as well as lowers charge transfer resistance. A Na + storage mechanism of reversible transformations between three phases and V 4+ /V 5+ redox couple for NVPO 2−x Cl x F cathode is verified. The NVPO 2−x Cl x F cathode reveals a high rate capacity of ≈63 mAh g −1 at 30C and great cycle stability over 1000 cycles at 10C. More importantly, outstanding rate property (314 Wh kg −1 at 5850 W kg −1 ) and cycling capability are obtained for the NVPO 2−x Cl x F//3DC@Se full cell. This study demonstrates a brand-new strategy to prepare advanced cathode materials for superior SIBs.

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In-situ constructing Na3V2(PO4)2F3/carbon nanocubes for fast ion diffusion with high-performance Na+-storage

Cited by 64 publications

References 64 publications

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

Lithium‐Substituted Tunnel/Spinel Heterostructured Cathode Material for High‐Performance Sodium‐Ion Batteries

A comprehensive review on recent advances of polyanionic cathode materials in Na‐ion batteries for cost effective energy storage applications

Localized Electron Density Redistribution in Fluorophosphate Cathode: Dangling Anion Regulation and Enhanced Na‐Ion Diffusivity for Sodium‐Ion Batteries

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