No abstract

The role of renewable energy is crucial for energy sustainability and depends upon the energy storage devices and their technical progress. The batteries prove themselves as reliable, efficient, and environmentally friendly energy storage devices. However, limitations such as safety issues, low energy density, leakage, etc. In view of that, solid-state electrolytes are the most promising alternative to liquid electrolytes because of their higher safety factor and potential for enough energy density. In contrast, these solid electrolytes also have limitations of low ionic conductivity and a higher interfacial resistance compared to conventional electrolytes. To overcome the mentioned limitations, the doping of filler materials in the electrolyte during synthesis is proven as one of the favorable techniques. The filler materials not just improve the ionic conductivity of the electrolyte but also enhance the thermal and mechanical stability. Furthermore, to decrease the interfacial resistance, the electrolyte should have good mechanical strength and a higher surface area. In this context, the use of microporous coordination polymers is proven to be the most practical and effective approach. The main aim of this work is to highlight the recent advancement in the applicability of porous polymers for solid-state electrolytes and to also provide the major benefits and limitations of porous material-based solid electrolytes. Along with this, a brief description of ultramodern porous coordination polymers is also included in this article.

The demand for solid polymer electrolytes is increasing continuously because of their better mechanical properties, stability, and strength while compared with liquid or gel electrolytes. However, the polymers are having poor ionic conductivity that can be improved by adding ionic salt during solid electrolyte production. Further, not all the electrolytes are compatible with polymers also the concentration of ionic salt beyond some limit not only decrease the ionic conductivity of solid electrolyte but also decrease the strength as well. In the present work, the mixture of two different polymers (10% PEO and 90% PVDF) is selected as the parent polymer for the production of solid polymer electrolytes. Mg(NO3)2 is used as ionic salt to increase the ionic conductivity and other properties of electrolytes. The concentration of Mg(NO3)2 is taken in 10%, 15%, and 20% (w%w) to the parent polymer, and the effects are analyzed on ionic conductivity. It is found that the addition of Mg(NO3)2 improves the ionic conductivity of electrolytes with a higher rate initially but the rate of increase of ionic conductivity decreases after 15%. Further, better thermal conduction and other properties are observed for the electrolyte having a 15% Mg(NO3)2 concentration. The detailed results are given in the present work.