Asymmetric electrochemical capacitor microdevice designed with vanadium nitride and nickel oxide thin film electrodes

Eustache, Étienne; Frappier, Renaud; Porto, Raúl Lucio; Bouhtiyya, S.; Pierson, J.F.; Brousse, Thierry

doi:10.1016/j.elecom.2012.12.015

Cited by 96 publications

(54 citation statements)

References 20 publications

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“…N-SiNWs electrodes grown by our deposition processes were first characterized in a 3 electrode cell using standard organic based Figure 2(a) depicts the CV of a n-doped silicon wafer. The quasi-rectangular shape of the CV and the linear dependence of current with the scan rate (not shown here) as observed in a previous study 6 seem to indicate that the charge storage mechanism is purely capacitive and not pseudocapacitive as observed for some oxides 25 or nitrides 26,27 thin films. Indeed, the computed capacitance value is quite small for the silicon wafer (6 µF cm ¹2 ), in good agreement with capacitance reported for carbon based electrodes.…”

Section: Porous Siliconsupporting

confidence: 63%

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

et al. 2013

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Highly n-doped silicon nanowires (SiNWs) have been grown by a chemical vapor deposition process and have been investigated as possible electrodes for electrochemical capacitors (ECs) micro-devices. Their performances have been compared to existing literature on the field, which shows the use of SiNWs fabricated via different techniques, SiC coated SiNWs and porous silicon layers. The double layer capacitance of n-doped silicon wafer is ≈6 µF cm −2 in standard organic electrolyte, and this value can be increased by nanostructuration of SiNWs up to 440 µF cm −2 by tuning deposition parameters. Similar values are found in the literature. Symmetrical microdevices based on two identical SiNWs electrodes can be operated in organic based electrolytes within a 1.2 V voltage window. The devices show excellent cycling efficiency over more than 2000 cycles, with capacitance value of 51 µF cm −2 and an energy density of 10 nWh cm −2 (37 µJ cm). The increase of specific surface area by different techniques may drastically boost these values in the near future.

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Section: Porous Siliconsupporting

confidence: 63%

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

et al. 2013

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“…It is worth noting that such performance combined with the simple and reproducible PVD synthesis of VN thin films make them attractive for electrochemical microsupercapacitor applications. 46,47,69,70 The VN pseudocapacitive behavior is thought to be due to surface oxide redox processes. 58 This has been further supported by surface characterization following cycling experiment between 0.0 and −1.2 V. 41,58 However, the fact that the VN was found to be unstable in 1 M KOH for potential more positive than −0.4 V demonstrates that further investigation is needed to confirm that the observed surface oxide was not just the result of some oxidation/degradation process.…”

Section: Discussionmentioning

confidence: 99%

“…Accordingly, several research groups considered materials such as MXenes 29,30 and transition metal nitrides. [31][32][33][34][35][36][37] In the latter class of compounds, molybdenum nitride was firstly investigated 32,33,35,38,39 and in the past decade a great deal of attention has focused on other nitrides with an intensive focus on vanadium nitride 37,[40][41][42][43][44][45][46][47][48][49][50][51][52][53][54][55][56][57][58] as a consequence of the impressive capacitance of 1340 F.g −1 reported for nanosized VN particles in 1 M KOH. 58 Indeed, VN is an interesting electrode material due to this high reported specific capacitance coupled with its close to metallic electronic conductivity (1.18 S.m −1 ), 59 high density (6.13 g.cm −3 ) and high melting point (2619 K).…”

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confidence: 99%

Suitable Conditions for the Use of Vanadium Nitride as an Electrode for Electrochemical Capacitor

Morel

Borjon-Piron

Porto

et al. 2016

J. Electrochem. Soc.

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Vanadium nitride has displayed many interesting characteristics for its use as a pseudocapacitive electrode in an electrochemical capacitor, such as good electronic conductivity, good thermal stability, high density and high specific capacitance. Thin films of VN were prepared by D.C. reactive magnetron sputtering. The electrochemical stability of the films as well as the influence of dissolved oxygen in 1 M KOH electrolyte were investigated. In order to avoid material as well as electrolyte degradation, it was concluded that vanadium nitride should only be cycled between −0.4 and −1.0 V vs. Hg/HgO. After a 24 hours stabilization period, the prepared VN thin film showed an initial capacitance of 19 mF.cm −2 and a capacity retention of 96% after 10000 cycles. Furthermore, dissolved oxygen in the electrolyte was demonstrated to cause self-discharge up to a potential above −0.4 V vs. Hg/HgO, where VN was shown to be unstable. Additionally, the presence of oxygen was shown to shift the open circuit potential of a VN electrode to about 0 V through self-discharge processes. Electrochemical capacitors are currently being developed to complement other energy storage or conversion systems such as batteries and fuel cells. In the past two decades, several electrode materials have been investigated. The mostly studied materials include carbons, 1-8 conducting polymers 9-12 as well as pseudocapacitive 13 transition metal oxides such as ruthenium dioxide 14-18 and manganese dioxide. [19][20][21][22][23][24] In the effort to improve the performance of electrochemical capacitors, a widely used approach has been to develop synthetic methods to develop nanomaterials that are believed to lead to increased energy density and higher rate capability. 14,23,[25][26][27][28] Another approach has been to investigate the charge storage properties of novel materials. Accordingly, several research groups considered materials such as MXenes 29,30 and transition metal nitrides. [31][32][33][34][35][36][37] In the latter class of compounds, molybdenum nitride was firstly investigated 32,33,35,38,39 and in the past decade a great deal of attention has focused on other nitrides with an intensive focus on vanadium nitride 37,40-58 as a consequence of the impressive capacitance of 1340 F.g −1 reported for nanosized VN particles in 1 M KOH. 58 Indeed, VN is an interesting electrode material due to this high reported specific capacitance coupled with its close to metallic electronic conductivity (1.18 S.m −1 ), 59 high density (6.13 g.cm −3 ) and high melting point (2619 K). 59The hypothesis proposed by Choi et al.58 to explain such a high specific capacitance of VN, is that, in addition to electrochemical double layer capacitance, successive fast reversible redox reactions are taking place, involving surface oxide groups and OH − ions from the electrolyte. This hypothesis was supported by the observation of surface oxide via ex-situ XPS 58 and FTIR 41,58 post cycling measurements.While most studies concentrated on new synthesis of VN with the goa...

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“…To date, three major types of materials have been reported as the electrode materials for ES, including carbonaceous materials, [6][7][8] conducting polymers [9][10][11] and transition metal oxides/hydroxides. [12][13][14] Of these various materials, transition metal oxides have attracted significant attention, due to they can achieve much higher capacity of storage charge than carbonaceous materials and better cycling performance than polymer materials. Hydrous RuO 2 exhibiting the remarkable pseudocapacitive behavior was recognized as the best electrode materials, but the high cost and toxicity hinder its widely commercial application.…”

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confidence: 99%

Construction of Three-Dimensional Homogeneous NiCo₂O₄Core/Shell Nanostructure as High-Performance Electrodes for Supercapacitors

Liu

Zhang

Yang

et al. 2015

J. Electrochem. Soc.

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A novel three-dimensional homogeneous NiCo 2 O 4 core/shell nanowire arrays were first fabricated via a facile synthesis strategy on nickel foam as advanced binder-free electrodes. The structure and morphology of the as-synthesized samples have been characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Energy dispersive X-ray spectrometry (EDS) and transmission electron microscopy (TEM). This novel NiCo 2 O 4 /NiCo 2 O 4 core/shell nanowire arrays exhibited superior electrochemical performances, including high specific capacitance of 2041 F g −1 at current density of 5 mA cm −2 , excellent rate performance with a capacitance retention of 88% as the current density increases from 5 to 50 mA cm −2 and good long-term cyclic stability. These outstanding electrochemical characteristics are mainly attributed to the superstructure, which provides a large number of electroactive sites for redox reaction, shortens the ion diffusion paths and enhances the morphological stability in the electrochemical process. Electrochemical supercapacitors (ES) are considered as a kind of important next-generation devices in the energy storage field because of their many advantages of high rate performance, suitable ratio between power density and energy density, long life cycle. 1-5As we know, electrode materials play a key role in determinating the performance of ES. Therefore, recent studies have been concentrated on developing appropriate materials with ideal characteristics of high surface area, good electrical conductivity and cycle stability for high-performance ES. To date, three major types of materials have been reported as the electrode materials for ES, including carbonaceous materials, 6-8 conducting polymers 9-11 and transition metal oxides/hydroxides. 12-14Of these various materials, transition metal oxides have attracted significant attention, due to they can achieve much higher capacity of storage charge than carbonaceous materials and better cycling performance than polymer materials. Hydrous RuO 2 exhibiting the remarkable pseudocapacitive behavior was recognized as the best electrode materials, but the high cost and toxicity hinder its widely commercial application. 15,16 In order to reduce the cost of precious metal use, great efforts have been made to investaging cheaper transition metal oxides with high rate and quasi-reversible of electrochemistry reaction and environmental friendliness to replace RuO 2 , such as MnO 2 , V 2 O 5 , Co 3 O 4 , ZnO, SnO 2 , NiO and their composites. [17][18][19][20][21][22][23] Recently, spinel nickel cobaltite (NiCo 2 O 4 ) has been proposed as a very potential alternative for electrode materials of ES, because its distinguished features of low cost and toxicity, high electrochemical response capacity, environmental friendliness and natural abundance. Moreover, compared to single-component oxides of cobalt oxide and nickel oxide, NiCo 2 O 4 can provide both nickel and cobalt ions for rich redox reactions, so it is expected to achieve higher capacitance and e...

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Asymmetric electrochemical capacitor microdevice designed with vanadium nitride and nickel oxide thin film electrodes

Cited by 96 publications

References 20 publications

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

Suitable Conditions for the Use of Vanadium Nitride as an Electrode for Electrochemical Capacitor

Construction of Three-Dimensional Homogeneous NiCo₂O₄Core/Shell Nanostructure as High-Performance Electrodes for Supercapacitors

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Asymmetric electrochemical capacitor microdevice designed with vanadium nitride and nickel oxide thin film electrodes

Cited by 96 publications

References 20 publications

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

Highly N-doped Silicon Nanowires as a Possible Alternative to Carbon for On-chip Electrochemical Capacitors

Suitable Conditions for the Use of Vanadium Nitride as an Electrode for Electrochemical Capacitor

Construction of Three-Dimensional Homogeneous NiCo2O4Core/Shell Nanostructure as High-Performance Electrodes for Supercapacitors

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Product

Resources

About

Construction of Three-Dimensional Homogeneous NiCo₂O₄Core/Shell Nanostructure as High-Performance Electrodes for Supercapacitors