Rechargeable Aqueous Electrochromic Batteries Utilizing Ti‐Substituted Tungsten Molybdenum Oxide Based Zn2+ Ion Intercalation Cathodes
Top Cited Papers
- 25 February 2019
- journal article
- research article
- Published by Wiley in Advanced Materials
- Vol. 31 (15), e1807065
- https://doi.org/10.1002/adma.201807065
Abstract
Batteries are used in every facet of human lives. Desirable battery architectures demand high capacity, rechargeability, rapid charging speed, and cycling stability, all within an environmentally friendly platform. Many applications are limited by opaque batteries; thus, new functionalities can be unlocked by introducing transparent battery architectures. This can be achieved by incorporating electrochromic and energy storage functions. Transparent electrochromic batteries enable new applications, including variable optical attenuators, optical switches, addressable displays, touch screen devices, and most importantly smart windows for energy‐efficient buildings. However, this technology is in the incipient state due to limited electrochromic materials having satisfactory optical contrast and capacity. As such, triggering electrochromism via Zn2+ intercalation is advantageous: Zn is abundant, safe, easily processed in aqueous electrolytes and provides two electrons during redox reactions. Here, enhanced Zn2+ intercalation is demonstrated in Ti‐substituted tungsten molybdenum oxide, yielding improved capacity and electrochromic performance. This technique is employed to engineer cathodes exhibiting an areal capacity of 260 mAh m−2 and high optical contrast (76%), utilized in the fabrication of aqueous Zn‐ion electrochromic batteries. Remarkably, these batteries can be charged by external voltages and self‐recharged by spontaneously extracting Zn2+, providing a new technology for practical electrochromic devices.Keywords
Funding Information
- Natural Sciences and Engineering Research Council of Canada (CRDPJ 509210‐17)
- Alberta Innovates
This publication has 56 references indexed in Scilit:
- Something from Nothing: Enhancing Electrochemical Charge Storage with Cation VacanciesAccounts of Chemical Research, 2012
- A Nanostructured Electrochromic SupercapacitorNano Letters, 2012
- Suppression of the coffee-ring effect by shape-dependent capillary interactionsNature, 2011
- High rate capabilities Fe3O4-based Cu nano-architectured electrodes for lithium-ion battery applicationsNature Materials, 2006
- Template‐Free Synthesis and Assembly of Single‐Crystalline Tungsten Oxide Nanowires and their Gas‐Sensing PropertiesAngewandte Chemie, 2005
- Template‐Free Synthesis and Assembly of Single‐Crystalline Tungsten Oxide Nanowires and their Gas‐Sensing PropertiesAngewandte Chemie, 2005
- Designing PbSe Nanowires and Nanorings through Oriented Attachment of NanoparticlesJournal of the American Chemical Society, 2005
- Electrochemical formation of oxygen-deficient molybdenum oxideApplied Surface Science, 1993
- Chemical intercalation of magnesium into solid hostsJournal of Materials Chemistry, 1991
- Nonaqueous Electrochemistry of Magnesium: Applications to Energy StorageJournal of the Electrochemical Society, 1990