Hydrated tungsten oxide nanosheet electrodes for broadband electrochromism and energy storage
| Autor: | Gayathri P.T.G., Biswapriya Deb, S. S. Shaiju, R. Remya |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment business.industry Materials Science (miscellaneous) Energy Engineering and Power Technology Pulse duration 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Energy storage 0104 chemical sciences Fuel Technology Nuclear Energy and Engineering Electrochromism Modulation Electrode Optoelectronics 0210 nano-technology business Voltage Power density Nanosheet |
| Zdroj: | Materials Today Energy. 10:380-387 |
| ISSN: | 2468-6069 |
| DOI: | 10.1016/j.mtener.2018.09.006 |
| Popis: | We combined an extremely efficient energy saving function with electrochemical energy storage by assembling an electrochromic multifunctioning smart glass (MSG) using crystalline nanosheets of WO3·H2O. Unlike the previous standards, this all-solid-state device employed a single pure-phase active layer for visual and near-infrared (NIR) modulation (350–1600 nm). We demonstrated that the modulation bandwidth could be preselected (full range or NIR) by controlling the pulse duration of the applied voltage (−2.8 V). The prototype exhibited an outstanding IR modulation efficiency (IRME, normalized) of ∼63%, a solar modulation efficiency (SME, normalized) ∼54% with high coloration efficiency (97.8 cm2 C−1 at 600 nm). The electrode was characterized by an exceptional volumetric capacitance of ∼173 Fcm−3 that transpired to a significant 28.7 Fcm−3 in the all-solid prototypes (operational voltage range ±2.5 V). At a galvanostatic discharge current density of 0.1 mAcm−2, we obtained the highest volumetric energy density of 85.7 mWhcm−3 with a power density ∼3.57 Wcm−3 making it well suitable as an input power source. The device showed good stability (1000 continuous cycles) and recoverable degradations over a period of one year. This unique and high-performing practical all-solid system is a big advancing for the realization of multifunctional smart windows and facades. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|
Full Text from ScienceDirect