Abstract
One of the most current trends in applied electrochemistry is the development of solid ionic conductors with electrical, mechanical and optical properties tailored for a specific functional application. Moreover, particular interest exists in materials with low environmental impact and low cost where matters as sustainability and recyclability are considered. In this study, these concerns were considered by developing a solid-state electrolyte based on regenerated cellulose that meets the requirements for application in electrochromic devices. This soft-matter electrolyte exhibits particularly high room temperature ionic conductivity in the range of 6.5 mS cm-1 and Young’s Modulus in the range 3.7 GPa. Optimized electrolyte membranes were applied to inorganic optically active films resulting in all-solid-state electrochromic devices with performances reaching a practical level, retaining its optical modulation characteristics after hundreds of cycles.
Highlights
IntroductionQuasi-solid soft matter and polymer solid-state electrolytes have been subject of extensive research aiming to replace liquid electrolytes in some relevant applications such as ion rechargeable batteries (Amici et al, 2019; Choudhury et al, 2019), fuel cells (Ahn et al, 2020), electrochromic displays/windows (Vidinha et al, 2008; Garino et al, 2013; Fernandes et al, 2014), and electrolytegated transistors (Cunha et al, 2017; Nketia-Yawson et al, 2019)
The crystallinity of cellulose solid electrolyte (CSE)/without sample can be improved by washing it with water, confirming that the decrease in crystallinity resulting from the presence of DMAc/LiCl entrapped in the regenerated films can be mitigated by microwave assisted regeneration
A new fully cellulose-based solid electrolyte functionalized with lithium ions produced by an easy and reproducible synthesis process was presented
Summary
Quasi-solid soft matter and polymer solid-state electrolytes have been subject of extensive research aiming to replace liquid electrolytes in some relevant applications such as ion rechargeable batteries (Amici et al, 2019; Choudhury et al, 2019), fuel cells (Ahn et al, 2020), electrochromic displays/windows (Vidinha et al, 2008; Garino et al, 2013; Fernandes et al, 2014), and electrolytegated transistors (Cunha et al, 2017; Nketia-Yawson et al, 2019). The last are of particular interest when aiming the improvement of the electrical properties through the addition of inorganic fillers (Ramos et al, 2013; Ji et al, 2017; Zhang et al, 2018) and plastic crystals (Fan et al, 2007; Zhang et al, 2017), and/or the mechanical properties that are achieved by the addition of cross-linked UV-curable polyethylene glycol (di)methacrylate [PEG(D)MA] (Gerbaldi et al, 2009; Choudhury et al, 2019) or ethoxylated trimethylolpropane triacrylate (Fan et al, 2018; Liu et al, 2019) Within this context, the increasing demand for low cost and more environmentally friendly and sustainable electrolytes leads to the integration of natural polymer hosts with excellent chemical stability and mechanical properties, such as cellulose and its derivatives (Irimia-Vladu, 2014). Cellulose can dissociate lithium salts, adsorb and retain the organic solvents, and accelerate the migration of lithium ions (Zhang et al, 2013; Du et al, 2019; Zhu et al, 2019)
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
