Flexible electrochromic supercapacitor hybrid electrodes based on tungsten oxide films and silver nanowires

Shen, Liuxue; Du, Lei; Tan, Shaozao; Zang, Zhigang; Zhao, Chuanxi; Mai, Wenjie

doi:10.1039/c6cc01139j

Cited by 380 publications

(98 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Here these symmetrical NDR properties at positive and negative potential may be attributed by the very good reversible charge trapping and detrapping processes of the samples. Commonly tungsten‐based samples mainly its oxides show good electrochemically charge storage nature and electrochromic behavior because of the reversible oxidation state change (+6 and +5) of W atoms governed by the potential variation . Here the reversible charge trapping and detrapping process of WO 3 .H 2 O and WO 3 with varying applied potential may be attributed to the reversible electron gain and loss via bridged O atoms as follows:

…”

Section: Resultsmentioning

confidence: 99%

“…Several studies have demonstrated that the tendency of ion insertion/extraction enhances with increasing the symmetry of crystalline forms, i.e., monoclinic phase < orthorhombic phase < tetragonal phase < cubic phase . Presently, some transition‐metal oxides or conducting polymers are used as active materials for supercapacitors because they all participate in fast Faradic reactions between the active materials and electrolytes . To cope the increasing demand of energy storage, WO 3 is a promising smart material especially as a negative electrode for fabrication of high‐performance electrochemical energy storage devices.…”

Section: Introductionmentioning

confidence: 99%

“…To cope the increasing demand of energy storage, WO 3 is a promising smart material especially as a negative electrode for fabrication of high‐performance electrochemical energy storage devices. It has wide compatibility in both supercapacitors and electrochromic devices, which can be easily visualized between the bleached state and colored state …”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A New Facile Synthesis of Tungsten Oxide from Tungsten Disulfide: Structure Dependent Supercapacitor and Negative Differential Resistance Properties

Mandal

Routh²,

Nandi

2017

Small

View full text Add to dashboard Cite

Tungsten oxide (WO ) is an emerging 2D nanomaterial possessing unique physicochemical properties extending a wide spectrum of novel applications which are limited due to lack of efficient synthesis of high-quality WO . Here, a facile new synthetic method of forming WO from tungsten sulfide, WS is reported. Spectroscopic, microscopic, and X-ray studies indicate formation of flower like aggregated nanosized WO plates of highly crystalline cubic phase via intermediate orthorhombic tungstite, WO H O phase. The charge storage ability of WO is extremely high (508 F g at current density of 1 A g ) at negative potential range compared to tungstite (194 F g at 1 A g ). Moreover, high (97%) capacity retention after 1000 cycles and capacitive charge storage nature of WO electrode suggest its supremacy as a negative electrode of supercapacitors. The asymmetric supercapacitor, based on the WO as a negative electrode and mildly reduced graphene oxide as a positive electrode, manifests high energy density of 218.3 mWhm at power density 1750 mWm , and exceptionally high power density, 17 500 mW m , with energy density of 121.5 mWh m . Furthermore, the negative differential resistance (NDR) property of both WO and WO .H O are reported for the first time and NDR is explained with density of state approach.

show abstract

…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A New Facile Synthesis of Tungsten Oxide from Tungsten Disulfide: Structure Dependent Supercapacitor and Negative Differential Resistance Properties

Mandal

Routh²,

Nandi

2017

Small

View full text Add to dashboard Cite

show abstract

“…Figure 2b represents the CV profiles of BNWs-CFC electrode at scan rates from 5 to 100 mV s −1 , which demonstrated a nearrectangular and symmetric shape. [29][30][31][32][33][34][35] To obtain further insight into the electrochemical performance of the BNWs electrodes, the electrochemical impedance spectroscopy (EIS) result was collected. CV curves of the BNWs-CFC recorded at different scan rates and the corresponding areal capacitance are 40.94, 37.13, 33.78, 30.86, 29.27, 28.02, and 26.93 mF cm −2 at scan rate 5-100 mV s −1 , respectively ( Figure 2c).…”

Section: Electrochemical Characterization Of Bnws-cfc Electrodementioning

confidence: 99%

Boron Element Nanowires Electrode for Supercapacitors

Xue

Gan

Huang

et al. 2018

Advanced Energy Materials

View full text Add to dashboard Cite

attention as ideal energy storage devices owing to their excellent power density, high safety, quick charging/discharging, and good cycling stability. [7][8][9][10][11][12][13] A research frontier is to develop flexible supercapacitors with good electrochemical and mechanical performance, where the integration of flexibility in supercapacitors is of great importance for powering various flexible electronics and enabling applications in multifunctional flexible electronics. [11,[14][15][16][17] Notably, the electrode material is the most crucial component for a supercapacitor, which directly determines the performance of supercapacitors. Electrical double-layer capacitors (EDLCs) suffer from the low specific capacitance which constitutes a huge obstacle for increasing the energy density, whereas pseudocapacitors possess the higher specific capacitance but are confined by relatively poor cycling stability and long discharging time. [1,14,18] So far, intensive efforts are aimed at improving the performance of supercapacitor based on traditional active materials including carbon-based material, transitional metal-based material, and conducting polymers. [1][2][3][4]7,8,19] Although some novel materials, including sulfides, selenides, etc., have been proposed to be supercapacitive materials, the pursuit of new categories of active materials as electrodes of supercapacitors remains a great challenge. [20][21][22] Recently, Jiang and co-workers theoretically predicted the superior capacitive performance of 2D boron sheets, which exhibit specific capacitance on the order of 400 F g −1 owing to their metallicity and low weight, suggesting boron element might be a potential electrode material of supercapacitors. [23] Unfortunately, so far, the desired experimental work on any materials based on boron element for supercapacitor has not been reported.Herein, we report a new category of supercapacitor materials: boron element nanowires (BNWs). Single-crystal BNWs were synthesized through a cost-effective chemical vapor deposition (CVD) method. Surprisingly, the as-prepared BNWs demonstrate high stability and promising capacitance in all alkaline, neutral, and acid aqueous electrolytes. Especially, in an H 2 SO 4 electrolyte, the BNWs on a carbon fiber cloth (CFC) substrate achieved a capacitance up to 60.2 mF cm −2 . Moreover, to understand the mechanism of capacitance in BNWs-CFCs, we studied the electrochemically charge/discharge processes of BNWs-CFC electrodes in three different electrolytes, which reveals different The pursuit of new categories of active materials as electrodes of supercapacitors remains a great challenge. Herein, for the first time, elemental boron as a superior electrode material of supercapacitors is reported, which exhibits significantly high capacitances and excellent rate performance in all alkaline, neutral, and acidic electrolytes. Notably, boron nanowire-carbon fiber cloth (BNWs-CFC) electrodes achieve a capacitance up to 42.8 mF cm −2 at a scan rate of 5 mV s −1 and 60.2 mF cm −2 at a current d...

show abstract

“…Its primary reason is the surface reactivity in the SC electrode, which is usually much faster as compared with the intercalation or redox process of the counter electrode. [29][30][31][32] As a typical 2D nanomaterial, 33 graphene possesses ultrahigh surface ratio; 34,35 therefore, the surface properties of graphene have potential to critically impact its electrochemical competence. [20][21][22][23] Graphene has become a dominating phenomenon in the energy storage research due to its outstandingly superlative properties 24,25 .…”

Section: Introductionmentioning

confidence: 99%

All graphene electrode for high‐performance asymmetric supercapacitor

et al. 2019

View full text Add to dashboard Cite

Electrode imbalance" is one of the major issues that hinders the potential performance of asymmetric supercapacitors (ASCs), which arises mainly due to the huge dissimilarities of the electrodes microstructures. Herein, an "allgraphene" electrode system is designed by simple chemo-thermal modification of graphene oxide. Chemically functionalized graphene (FG) cathode and two anodes based on thermally reduced graphene oxide (TrGO) and iodine-doped graphene (IG) prepared via simple synthetic routes, followed by assembling into ASCs. The ASC comprising FG cathode-IG anode delivers phenomenally high energy-power (E-P) density (91 W h kg −1 and 424.95 W kg −1 ) and a good capacitance retention after 10 000 cycles. This outcome is accredited to the similar chemistry of electrodes resulting in a minimal electrode imbalance.The developed scheme has capacity to be employed as all-graphene hybrid energy storage system outputting enhanced performance and cyclic stability.asymmetric supercapacitor, all-graphene electrode system, functionalized graphene, iodinedoped graphene, ultra-high energy density

show abstract

Flexible electrochromic supercapacitor hybrid electrodes based on tungsten oxide films and silver nanowires

Cited by 380 publications

References 23 publications

A New Facile Synthesis of Tungsten Oxide from Tungsten Disulfide: Structure Dependent Supercapacitor and Negative Differential Resistance Properties

A New Facile Synthesis of Tungsten Oxide from Tungsten Disulfide: Structure Dependent Supercapacitor and Negative Differential Resistance Properties

Boron Element Nanowires Electrode for Supercapacitors

All graphene electrode for high‐performance asymmetric supercapacitor

Contact Info

Product

Resources

About