Hierarchical MoS2-Coated V2O3 composite nanosheet tubes as both the cathode and anode materials for pseudocapacitors

Peng, Huarong; Liu, Tianyu; Li, Yanhong; Wei, Xiujuan; Cui, Xun; Zhang, Yunhuai; Xiao, Peng

doi:10.1016/j.electacta.2018.04.219

Cited by 21 publications

(7 citation statements)

References 47 publications

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“…MoS 2 is a pseudocapacitor electrode material that shows higher intrinsic ionic conductivity than metal oxides [ 41 , 42 ] and its multivalence states are beneficial for higher energy density [ 43 ]. The capacitance of MoS 2 nanostructures originates from its surface redox activity, which accounts for higher pseudocapacitance at a higher rate capability [ 44 ]. Moreover, MoS 2 and other dichalcogenides have previously been proved to have a significantly active site on metal nitride surfaces, which is highly favorable for capacity enhancement and structural stability [ 45 , 46 ].…”

Section: Resultsmentioning

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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Section: Resultsmentioning

confidence: 99%

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

Xiong

Tan

et al. 2020

Nanomaterials

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“…Figure f shows the electrochemical impedance spectroscopy of MoS 2 /carbon nanocomposites and pure MoS 2 . The compressed semicircle relates to the charge transfer resistance, whereas the inclined line is described as Warburg impedance . As can be seen in Figure f, the charge transfer resistance gradually decreases with the increase in carbon content.…”

Section: Resultsmentioning

confidence: 95%

Facile Synthesis of Molybdenum Disulfide/Carbon Nanocomposites in Polyacrylic Acid Hydrogel as Anode for Lithium‐Ion Batteries

et al. 2019

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Molybdenum disulfide (MoS2)/carbon nanocomposites are grown in a polyacrylic acid (PAA) hydrogel system via a facile hydrothermal process and carbonization of PAA by heat treatment under an argon atmosphere. The content of the MoS2 electrode material can be controlled effectively by adjusting the immersing time of the MoS2 precursor with PAA hydrogel. The MoS2/carbon nanocomposites containing MoS2 nanosheets are uniformly embedded in a 3D interconnected network carbon matrix. The unique network structure as a nano/microreactor to produce MoS2 nanosheets contributes to suppressing the aggregation of MoS2 nanosheets and improving the conductivity of nanocomposites. The MoS2/carbon nanocomposites demonstrate a good cycling stability and superior rate performance.

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“…MoS 2 is an excellent candidate for this purpose because of its porous structure, large specific surface area, high chemical stability, good hydrophilicity, and excellent lubricating properties. [22][23][24][25][26] The favorable range of oxidation states of Mo atoms makes MoS 2 suitable for electrosorption capacity through the pseudocapacitor reactions. [25] In this work, we explore the triboelectric properties of an ionic liquid and 2D MoS 2 under light illumination.…”

Section: Introductionmentioning

confidence: 99%

Pseudocapacitance‐Induced Synaptic Plasticity of Tribo‐Phototronic Effect Between Ionic Liquid and 2D MoS₂

Ahmadi,

Abnavi,

Hasani

et al. 2023

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Contact‐induced electrification, commonly referred to as triboelectrification, is the subject of extensive investigation at liquid–solid interfaces due to its wide range of applications in electrochemistry, energy harvesting, and sensors. This study examines the triboelectric between an ionic liquid and 2D MoS2 under light illumination. Notably, when a liquid droplet slides across the MoS2 surface, an increase in the generated current and voltage is observed in the forward direction, while a decrease is observed in the reverse direction. This suggests a memory‐like tribo‐phototronic effect between ionic liquid and 2D MoS2. The underlying mechanism behind this tribo‐phototronic synaptic plasticity is proposed to be ion adsorption/desorption processes resulting from pseudocapacitive deionization/ionization at the liquid–MoS2 interface. This explanation is supported by the equivalent electrical circuit modeling, contact angle measurements, and electronic band diagrams. Furthermore, the influence of various factors such as velocity, step size, light wavelength and intensity, ion concentration, and bias voltage is thoroughly investigated. The artificial synaptic plasticity arising from this phenomenon exhibits significant synaptic features, including potentiation/inhibition, paired‐pulse facilitation/depression, and short‐term memory (STM) to long‐term memory (LTM) transition. This research opens up promising avenues for the development of synaptic memory systems and intelligent sensing applications based on liquid–solid interfaces.

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Hierarchical MoS2-Coated V2O3 composite nanosheet tubes as both the cathode and anode materials for pseudocapacitors

Cited by 21 publications

References 47 publications

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

Facile Synthesis of Molybdenum Disulfide/Carbon Nanocomposites in Polyacrylic Acid Hydrogel as Anode for Lithium‐Ion Batteries

Pseudocapacitance‐Induced Synaptic Plasticity of Tribo‐Phototronic Effect Between Ionic Liquid and 2D MoS₂

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Hierarchical MoS2-Coated V2O3 composite nanosheet tubes as both the cathode and anode materials for pseudocapacitors

Cited by 21 publications

References 47 publications

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

Asymmetric Pseudocapacitors Based on Interfacial Engineering of Vanadium Nitride Hybrids

Facile Synthesis of Molybdenum Disulfide/Carbon Nanocomposites in Polyacrylic Acid Hydrogel as Anode for Lithium‐Ion Batteries

Pseudocapacitance‐Induced Synaptic Plasticity of Tribo‐Phototronic Effect Between Ionic Liquid and 2D MoS2

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Pseudocapacitance‐Induced Synaptic Plasticity of Tribo‐Phototronic Effect Between Ionic Liquid and 2D MoS₂