Facile synthesis of Co 3 V 2 O 8 nanoparticle arrays on Ni foam as binder-free electrode with improved lithium storage properties

Yang, Li; Kong, Ling‐Bin; Liu, Mao‐Cheng; Zhang, Wei-Bin; Kang, Long

doi:10.1016/j.ceramint.2016.10.058

Cited by 18 publications

(6 citation statements)

References 49 publications

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“…This observation is consistent with the similar slopes, δ values, between the two interlayers of the plots between the real part of impedance spectra and angular frequency, Z’ vs ω –1/2 (ω = 2πf), as shown in Figure S7b. The Warburg factor (δ) is known to be inversely proportional to the diffusion coefficient of Li + ion . More importantly, the WN chemically adsorbed polysulfides, reducing both the interfacial resistance and the charge-transfer resistance .…”

Section: Resultsmentioning

confidence: 99%

“…The Warburg factor (δ) is known to be inversely proportional to the diffusion coefficient of Li + ion. 50 More importantly, the WN chemically adsorbed polysulfides, reducing both the interfacial resistance and the charge-transfer resistance. 20 Consequently, the R ct value sharply decreased from 24 to 0.89 Ω after the interdiction of a WN/CC interlayer, thanks to the enhanced surface reactions.…”

Section: Resultsmentioning

confidence: 99%

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Tungsten Nitride/Carbon Cloth as Bifunctional Electrode for Effective Polysulfide Recycling

Wang

Luo

Zhang

et al. 2019

ACS Appl. Energy Mater.

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The inevitable dissolution, diffusion, and migration of polysulfides cause an irreversible loss of active material, leading to poor cyclic performance in lithium sulfur batteries. Herein, a freestanding tungsten nitride nanorod/carbon cloth (WN/CC) interlayer is prepared by hydrothermal growth to function as both current collector and physicochemical barrier to soluble lithium polysulfides (Li2S x ). The cells containing a dual-functional interlayer deliver a significantly improved initial discharge capacity of 1337 mAh g–1 with a reversible capacity of 814.2 mAh g–1 after 500 cycles at 100 mA g–1. The enhanced electrochemical performance is attributed to the highly adsorptive WN nanorods grown on conductive CC to entrap polysulfides, leading to effective recycling of active materials. The density functional theory (DFT) calculations prove important roles of the WN (200) surface in entrapping polysulfides through their strong adsorption energies (3.21–4.67 eV) with Li2S x and S8. The potential of the dual-functional WN/CC composite interlayer in improving the electrochemical performance of lithium sulfur batteries has not been reported previously.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Tungsten Nitride/Carbon Cloth as Bifunctional Electrode for Effective Polysulfide Recycling

Wang

Luo

Zhang

et al. 2019

ACS Appl. Energy Mater.

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“…Although many efforts have been devoted to solving the volume expansion of Ni 3 S 2 during Na + insertion/extraction processes, the design of different nanostructures is still an effective way to alleviate obstacles mentioned above and improve the Na + storage performance. Self-standing one-dimensional (1D) nanostructure can provide enough buffer spaces to accommodate the large volume expansion through the rapid Na + sodiation/desodiation processes. − Compared to the traditional Ni 3 S 2 electrodes using the coating method, the design of Ni 3 S 2 nanowires directly grown on the current collector exhibits a good adhesion behavior and better point contacts, leading to excellent structural stability.…”

Section: Introductionmentioning

confidence: 99%

Hierarchically Interconnected Ni₃S₂ Nanofibers as Binder-Free Electrodes for High-Performance Sodium-Ion Energy-Storage Devices

Liu

Yang

et al. 2019

ACS Appl. Nano Mater.

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Direct growth of hierarchically interconnected Ni3S2 nanofibers as binder-free electrodes for high-performance sodium (Na+)-ion batteries was demonstrated by a facile one-step hydrothermal method on a nickel (Ni) foam. The hierarchically interconnected Ni3S2 nanofibers can effectively relieve volume expansion of Ni3S2 and shorten diffusion paths of Na+ ions that can enhance the high electronic conductivity during the electrochemical reaction, yielding high specific capacitance, excellent cycling stability, and outstanding rate capability. As a result, a high discharge specific capacity of 584.2 mAh g–1 at a current density of 0.2 A g–1 in the first sodiation process with a capacity retention of 91.9% after 100 cycles (retains 536.9 mAh g–1) can be achieved. The asymmetric Na+-ion capacitor based on the hierarchically interconnected Ni3S2 nanofibers as binder-free anode materials and the activated carbon as a cathode material exhibits high energy and power density. Interestingly, the conversion reaction mechanism of Na+-ion storage in the hierarchically interconnected Ni3S2 nanofibers was also investigated by the ex situ X-ray diffraction studies, suggesting a promising material as the binder-free electrode for advanced Na+-ion energy storage.

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“…During the first discharge cycle, a reduction peak at around 1.41 V can be attributed to the conversion of Co 3 V 2 O 8 into CoO accompanied by the formation of Li x V 2 O 5 . In the next step, Li x V 2 O 5 gets further lithiated to form Li x + y V 2 O 5, which appears as a cathodic peak at 1.12 V. A strong cathodic peak observed at 0.65 V is assigned to the reduction of CoO to elemental Co and the formation of Li 2 O, which is known as the solid electrolyte interface (SEI) . A weak cathodic peak at 0.02 V is attributed to Li–Co alloy formation in the presence of Li + ions.…”

Section: Resultsmentioning

confidence: 99%

“…16 In the next step, Li x V 2 O 5 gets further lithiated to form Li x+y V 2 O 5, which appears as a cathodic peak at 1.12 V. A strong cathodic peak observed at 0.65 V is assigned to the reduction of CoO to elemental Co and the formation of Li 2 O, which is known as the solid electrolyte interface (SEI). 35 A weak cathodic peak at 0.02 V is attributed to Li−Co alloy formation in the presence of Li + ions. All the anodic peaks correspond to subsequent reversible electrochemical reactions with a slight negative shift in the first two cathodic peaks.…”

Section: Morphology and Structural Characterizationmentioning

confidence: 99%

Chalcogenide Dopant-Induced Lattice Expansion in Cobalt Vanadium Oxide Nanosheets for Enhanced Supercapacitor Performance

Sharma

Gupta

Sharma

et al. 2021

ACS Appl. Energy Mater.

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We explore the effect of sulfur doping in Co 3 V 2 O 8 on the electrochemical performance of supercapacitors in terms of enhanced lattice spacing, electrochemical surface area (ECSA), electronic conductivity, and density of states. The sulfur-doped Co 3 V 2 O 8 (S-Co 3 V 2 O 8 ) nanosheets were grown in situ as a binderfree synthesis on nickel foam by the hydrothermal method. The electrochemical performance was analyzed in an aqueous alkaline electrolyte where the S-Co 3 V 2 O 8 electrode exhibited a specific capacity of 410 mAh/g at 2 A/g with enhanced rate capability and capacity retention of 94.2% at 5 A/g specific currents after 4000 cycles, whereas the undoped Co 3 V 2 O 8 electrode exhibited a specific capacity of 337.8 mAh/g at 2 A/g. The high capacity of S-Co 3 V 2 O 8 is attributed to the enhanced ECSA (by ∼45%) and improved electrical conductivity (by ∼22%) upon doping with sulfur. Furthermore, these results corroborated with density functional theory results. The calculations suggest an increase in lattice parameters and the introduction of additional density of states near the valence-band edge due to the doping of sulfur, resulting in a decrease in charge-transfer resistance. An asymmetric supercapacitor was fabricated, using S-Co 3 V 2 O 8 nanosheets as the cathode and activated carbon as the anode, which shows a high specific capacity (or capacitance) value of 485 mAh/g, an energy density of 36.4 W h/kg, and a power density of 740 W/kg at 2 A/g with 98.4% specific capacity retention after 4000 consecutive charge−discharge cycles. Furthermore, the analysis was extended in a nonaqueous medium for Li-ion storage where S-Co 3 V 2 O 8 exhibits a specific capacity of 994 mA h/g and a specific energy density of 828 W h/kg at 1 A/g making it a promising candidate for future high-energy storage systems. The concept of doping is extended to other chalcogenide (e.g., selenium) doping (Se-Co 3 V 2 O 8 ), which also shows improved device performance and makes this a versatile approach for high-performance devices.

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Facile synthesis of Co 3 V 2 O 8 nanoparticle arrays on Ni foam as binder-free electrode with improved lithium storage properties

Cited by 18 publications

References 49 publications

Tungsten Nitride/Carbon Cloth as Bifunctional Electrode for Effective Polysulfide Recycling

Tungsten Nitride/Carbon Cloth as Bifunctional Electrode for Effective Polysulfide Recycling

Hierarchically Interconnected Ni₃S₂ Nanofibers as Binder-Free Electrodes for High-Performance Sodium-Ion Energy-Storage Devices

Chalcogenide Dopant-Induced Lattice Expansion in Cobalt Vanadium Oxide Nanosheets for Enhanced Supercapacitor Performance

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Facile synthesis of Co 3 V 2 O 8 nanoparticle arrays on Ni foam as binder-free electrode with improved lithium storage properties

Cited by 18 publications

References 49 publications

Tungsten Nitride/Carbon Cloth as Bifunctional Electrode for Effective Polysulfide Recycling

Tungsten Nitride/Carbon Cloth as Bifunctional Electrode for Effective Polysulfide Recycling

Hierarchically Interconnected Ni3S2 Nanofibers as Binder-Free Electrodes for High-Performance Sodium-Ion Energy-Storage Devices

Chalcogenide Dopant-Induced Lattice Expansion in Cobalt Vanadium Oxide Nanosheets for Enhanced Supercapacitor Performance

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Hierarchically Interconnected Ni₃S₂ Nanofibers as Binder-Free Electrodes for High-Performance Sodium-Ion Energy-Storage Devices