Electrospun polyporous VN nanofibers for symmetric all-solid-state supercapacitors

Zhang, Dandan; Li, Jing; Su, Zhen; Hu, Sanyuan; Li, Heping; Yan, Yunjun

doi:10.1007/s40145-018-0276-2

Cited by 25 publications

(9 citation statements)

References 56 publications

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“…The high-resolution of V 2p spectra (Fig. 2(e)) split into two peaks located at 517.4 eV (V 2p3/2) and 523.9 eV (V 2p1/2), which can be attributed to the trivalent V in the NMVP/C [28,29]. In the case of C (Fig.…”

Section: Resultsmentioning

confidence: 96%

Tuning crystal structure and redox potential of NASICON-type cathodes for sodium-ion batteries

Cao

Zhou

et al. 2020

Nano Res.

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Sodium superionic conductor (NASICON)-type compounds have been regarded as promising cathodes for sodium-ion batteries (SIBs) due to their favorable ionic conductivity and robust structural stability. However, their high cost and relatively low energy density restrict their further practical application, which can be tailored by widening the operating voltages with earth-abundant elements such as Mn. Here, we propose a rational strategy of infusing Mn element in NASICON frameworks with sufficiently mobile sodium ions that enhances the redox voltage and ionic migration activity. The optimized structure of Na 3.5 Mn 0.5 V 1.5 (PO 4 ) 3 /C is achieved and investigated systematically to be a durable cathode (76.6% capacity retention over 5,000 cycles at 20 C) for SIBs, which exhibits high reversible capacity (113.1 mAh•g −1 at 0.5 C) with relatively low volume change (7.6%). Importantly, its high-areal-loading and temperature-resistant sodium ion storage properties are evaluated, and the full-cell configuration is demonstrated. This work indicates that this Na 3.5 Mn 0.5 V 1.5 (PO 4 ) 3 /C composite could be a promising cathode candidate for SIBs.

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Section: Resultsmentioning

confidence: 96%

Tuning crystal structure and redox potential of NASICON-type cathodes for sodium-ion batteries

Cao

Zhou

et al. 2020

Nano Res.

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“…Thus, it is urgent to develop a sustainable and renewable energy storage equipment to effectively store and utilize these energy resources. Among all the energy storage devices, supercapacitors have the potential to be the most promising electrochemical cells in the coming future owing to the superior advantages such as high power density, favorable cyclic performance, rapid charge rates, and safe operation [4][5][6].…”

Section: Introduction mentioning

confidence: 99%

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

et al. 2022

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A series of high-entropy perovskite oxides (HEPOs) La(CoCrFeMnNiAlx)1/(5+x)O3−δ (x = 0.4, 0.5, 0.6, and 0.7) have been synthesized by coprecipitation method combined with calcination process and explored as electrodes for supercapacitors. The crystal structure, microstructure, and elemental composition of HEPOs were investigated by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy-dispersive X-ray spectroscopy (EDS) in detail. The electrochemical properties of HEPOs as supercapacitor electrodes were elucidated. The specific capacitances of HEPOs (x = 0.4, 0.5, 0.6, and 0.7) are 281.84, 353.65, 325.60, and 259.30 F/g at the current density of 1 A/g, respectively. After 2000 cycles, the specific capacitances of HEPOs (x = 0.4, 0.5, 0.6, and 0.7) remain 85.01%, 88.61%, 86.37%, and 91.25%, respectively. Such outstanding electrochemical properties can be attributed to the entropy-stabilized structure caused by mixed six cations in B-site and the Al3+-doping suppressing active ion aggregation during charge—discharge process. This research highlights the potential of HEPOs as electrodes for supercapacitors.

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“…Generally, to enhance the storage performance of VN, strategies such as nanostructuring [ 18 , 19 , 20 , 21 ] and hybridization [ 22 , 23 , 24 ] have been employed. The hybridization approach involves carbon-based hybrids [ 21 , 25 , 26 ] and carbon-free hybrids [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

Xiong

Tan

et al. 2020

Nanomaterials

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Vanadium nitride (VN) shows promising electrochemical properties as an energy storage devices electrode, specifically in supercapacitors. However, the pseudocapacitive charge storage in aqueous electrolytes shows mediocre performance. Herein, we judiciously demonstrate an impressive pseudocapacitor performance by hybridizing VN nanowires with pseudocapacitive 2D-layered MoS2 nanosheets. Arising from the interfacial engineering and pseudocapacitive synergistic effect between the VN and MoS2, the areal capacitance of VN/MoS2 hybrid reaches 3187.30 mF cm−2, which is sevenfold higher than the pristine VN (447.28 mF cm−2) at a current density of 2.0 mA cm−2. In addition, an asymmetric pseudocapacitor assembled based on VN/MoS2 anode and TiN coated with MnO2 (TiN/MnO2) cathode achieves a remarkable volumetric capacitance of 4.52 F cm−3 and energy density of 2.24 mWh cm−3 at a current density of 6.0 mA cm−2. This work opens a new opportunity for the development of high-performance electrodes in unfavorable electrolytes towards designing high areal-capacitance electrode materials for supercapacitors and beyond.

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Electrospun polyporous VN nanofibers for symmetric all-solid-state supercapacitors

Cited by 25 publications

References 56 publications

Tuning crystal structure and redox potential of NASICON-type cathodes for sodium-ion batteries

Tuning crystal structure and redox potential of NASICON-type cathodes for sodium-ion batteries

Inactive Al3+-doped La(CoCrFeMnNiAlx)1/(5+x)O3 high-entropy perovskite oxides as high performance supercapacitor electrodes

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

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