Facile Method To Synthesize Na-Enriched Na1+xFeFe(CN)6 Frameworks as Cathode with Superior Electrochemical Performance for Sodium-Ion Batteries

Li, Weijie; Chou, Shulei; Wang, Jiazhao; Kang, Yong‐Mook; Wang, Jianli; Liu, Yong; Gu, Qinfen; Liu, Huan; Dou, Shi Xue

doi:10.1021/cm504091z

Cited by 181 publications

(137 citation statements)

References 27 publications

(69 reference statements)

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“…The detailed capacity retention of HCS‐PBMN electrode at different cycles was presented in the Figure c. The capacity fading of electrode mainly occurred in the first 50 cycles, which might have been caused by the formation of surface passivation layer and degeneration of framework structure . After 200 cycles, the capacity fading obviously decreased to about 0.0185% for each cycle.…”

Section: Resultsmentioning

confidence: 98%

A Chemical Precipitation Method Preparing Hollow–Core–Shell Heterostructures Based on the Prussian Blue Analogs as Cathode for Sodium‐Ion Batteries

Huang

Xie

Wang

et al. 2018

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129

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Prussian blue and its analogs are regarded as the promising cathodes for sodium-ion batteries (SIBs). Recently, various special structures are constructed to improve the electrochemical properties of these materials. In this study, a novel architecture of Prussian blue analogs with large cavity and multilayer shells is investigated as cathode material for SIBs. Because the hollow structure can relieve volume expansion and core-shell heterostructure can optimize interfacial properties, the complex structure materials exhibited a highly initial capacity of 123 mA h g and a long cycle life. After 600 cycles, the reversible capacity of the electrode still maintains at 102 mA h g without significant voltage decay, indicating a superior structure stability and sodium storage kinetics. Even at high current density of 3200 mA g , the electrode still delivers a considerable capacity above 52 mA h g . According to the electrochemical analysis and ex-situ measurements, it can be inferred that the enhanced apparent diffusion coefficient and improved insertion/extraction performance of electrode have been obtained by building this new morphology.

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Section: Resultsmentioning

confidence: 98%

A Chemical Precipitation Method Preparing Hollow–Core–Shell Heterostructures Based on the Prussian Blue Analogs as Cathode for Sodium‐Ion Batteries

Huang

Xie

Wang

et al. 2018

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129

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“…Such ultrahigh rate capability is far beyond that of any previously reported PB‐based cathode materials (Figure b, Table S1, Supporting Information). [5b,6,7,9,10,11,12,13,14,15,19] It is also very competitive to other excellent cathode materials, such as transition metal oxides and phosphates. [4,18b,20]…”

Section: Resultsmentioning

confidence: 99%

Prussian Blue@C Composite as an Ultrahigh‐Rate and Long‐Life Sodium‐Ion Battery Cathode

Jiang

Wang

et al. 2016

Adv Funct Materials

359

250

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Rechargeable sodium ion batteries (SIBs) are surfacing as promising candidates for applications in large-scale energy-storage systems. Prussian blue (PB) and its analogues (PBAs) have been considered as potential cathodes because of their rigid open framework and low-cost synthesis. Nevertheless, PBAs suffer from inferior rate capability and poor cycling stability resulting from the low electronic conductivity and defi ciencies in the PBAs framework. Herein, to understand the vacancy-impacted sodium storage and Na-insertion reaction kinetics, we report on an in-situ synthesized PB@C composite as a high-performance SIB cathode. Perfectly shaped, nanosized PB cubes were grown directly on carbon chains, assuring fast charge transfer and Na-ion diffusion. The existence of [Fe(CN) 6 ] vacancies in the PB crystal is found to greatly degrade the electrochemical activity of the Fe LS (C) redox couple via fi rst-principles computation. Superior reaction kinetics are demonstrated for the redox reactions of the Fe HS (N) couple, which rely on the partial insertion of Na ions to enhance the electron conduction. The synergistic effects of the structure and morphology results in the PB@C composite achieving an unprecedented rate capability and outstanding cycling stability (77.5 mAh g −1 at 90 C, 90 mAh g − 1 after 2000 cycles at 20 C with 90% % capacity retention).

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“…[ 7 ] During the past few years, searching for new electrode materials has been on the upsurge and rational modifications were further adopted to optimize the structural stability and enhance the sodium storage property, such as molecular engineering and morphology construction. [ 8–16 ] It is well‐known that copper metal has been widely applied in electronic devices benefiting from low cost and high electronic conductivity. In case of battery field, it can be served as the collector to converge current but not as electrode for energy storage.…”

Section: Figurementioning

confidence: 99%

Manipulating Molecular Structure and Morphology to Invoke High‐Performance Sodium Storage of Copper Phosphide

Liu

Lai

et al. 2020

Advanced Energy Materials

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Copper is used as current collector in rechargeable ion batteries due to its outstanding electronic conductivity and low cost. The intrinsic inactivity of copper, however, makes it a poor candidate for an electrode material without further structural modification. To fully utilize its high electronic conductivity, herein, the incorporation of heterogeneous phosphorus combined with building a unique 3D hollow structure is proposed. The as‐prepared copper phosphide hollow nanocubes deliver a stable capacity of 325 mAh·g−1 at 50 mA·g−1 and fast charging and discharging via pseudocapacitance behavior. The outstanding electrochemical performance is attributed to the synergetic effects of high electronic conductivity of copper and the high sodium storage capability of phosphorus. In addition, this facile synthesis method is also easily scaled up for practical applications. Thus, copper phosphide is a promising anode material for sodium ion batteries.

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Facile Method To Synthesize Na-Enriched Na_1+xFeFe(CN)₆ Frameworks as Cathode with Superior Electrochemical Performance for Sodium-Ion Batteries

Cited by 181 publications

References 27 publications

A Chemical Precipitation Method Preparing Hollow–Core–Shell Heterostructures Based on the Prussian Blue Analogs as Cathode for Sodium‐Ion Batteries

A Chemical Precipitation Method Preparing Hollow–Core–Shell Heterostructures Based on the Prussian Blue Analogs as Cathode for Sodium‐Ion Batteries

Prussian Blue@C Composite as an Ultrahigh‐Rate and Long‐Life Sodium‐Ion Battery Cathode

Manipulating Molecular Structure and Morphology to Invoke High‐Performance Sodium Storage of Copper Phosphide

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