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Solid-State Electrolytes for Lithium-Ion Batteries
Published in Prasanth Raghavan, Fatima M. J. Jabeen, Ceramic and Specialty Electrolytes for Energy Storage Devices, 2021
Jabeen Fatima M. J., P. P. Abhijith, N. S. Jishnu, Das Akhila, Neethu T.M. Balakrishnan, Jou-Hyeon Ahn, Prasanth Raghavan
Polymer electrolytes are promising candidates for next-generation energy storage devices. The current generation relies on electronic gadgets that are powered using energy storage devices. Among these energy storage devices, lithium-ion batteries have a key role owing to their enhanced energy density. In the current era, society is being mobilized by lithium-ion batteries, from health trackers to electric vehicles. As a major energy storage device used in our day-to-day life, the safety of lithium-ion batteries is of primary concern, hence major research interest is focused on electrolytes. Gel polymer electrolytes overcome the demerits of conventional liquid electrolytes. The ionic conductivity of the liquid electrolyte is high but safety issues have been raised due to development of thermal energy inside the LIBs during the continuous charge-discharge cycling, the battery lead to firing. The use of polymeric electrolytes overcomes these issues but conductivity is decreased. The improvement in properties such as ionic conductivity, glass transition temperature, and degree of crystallinity will enhance the performance of electrolytes for efficient energy storage devices.
Poly(Vinylidene Fluoride- co-Hexafluoropropylene) (PVdF-co-HFP)-Based Gel Polymer Electrolyte for Lithium-Ion Batteries
Published in Prasanth Raghavan, Fatima M. J. Jabeen, Polymer Electrolytes for Energy Storage Devices, 2021
Akhila Das, Neethu T. M. Balakrishnan, N. S. Jishnu, Jarin D. Joyner, Jou-Hyeon Ahn, Fatima M. J. Jabeen, Prasanth Raghavan
Polymer electrolytes are electrolytic materials which have a wide range of applications in electrochemical energy storage materials. These materials are synthesized by the dissolution of lithium salts in high-molecular-weight polymers. There are different techniques for the synthesis of polymer electrolytes, including (a) solvent casting [17], (b) phase inversion [18, 19], (c) plasticizer extraction and (d) electro-spinning [20]. Plasticizer extraction is a preparation method in which plasticizers are added to improve the mechanical and thermal properties of the polymer matrix. These matrices provide nanoscale pore sizes, having lower porosity (~50%). This technique is a complex process and is expensive, compared with other techniques. Later, advanced synthetic techniques, such as phase-inversion and electrospinning processes, were also introduced, which resulted in greater porosity and conductivity. Detailed explanation of solution-casting, phase-inversion and electrospinning techniques, and their effects on the electrochemical properties of PVdF-co-HFP are discussed in the subsequent sections.
Qualitative Fourier Transform Infrared Spectroscopic Analysis of Polyether-Based Polymer Electrolytes
Published in Chin Hua Chia, Chin Han Chan, Sabu Thomas, Functional Polymeric Composites, 2017
Siti Rozana Bt. Abdul Karim, Chin Han Chan
The demand for electronic devices such as cell phones, laptops, tablets, etc., with high performance is on the rise nowadays. In order to fabricate energy storage that can support the performance of these devices, extensive researches have been carried out academically and industrially with the ultimate goal to produce better and higher performance lithiumion rechargeable batteries. Polymer electrolyte is a membrane separator between the cathode and the anode of a rechargeable battery. Basically, there are three types of polymer electrolytes, viz., the gel polymer electrolytes (GPEs), liquid polymer electrolytes (LPEs), and solid polymer electrolytes (SPEs).
Structural, electrical and dielectric studies of PVA based NaNO3 Polymer electrolytes for battery applications
Published in International Journal of Ambient Energy, 2023
M. Gnana Kiran, NK. Jyothi, M.C. Rao, S.K. Babu, P. Pardhasaradhi, G.R.K. Prasad, M.P. Rao, K. Samatha
Polymer electrolytes show excellent outputs in such devices as rechargeable batteries in many applications. For the past few decades, a detailed investigation has been running on Lithium-ion batteries. These are used in communication and computer peripherals and battery vehicles. Rechargeable batteries are mainly available in two types (1) solid type and (2) liquid type. Many advantages are seen in solid batteries over liquid types. High energy density and flexibility are some of the benefits of solid batteries. The main advantage of the solid battery is that it avoids the leakage problem. Polymer electrolytes have been used to prepare solid type batteries. Polymer electrolytes are generally designed in three ways: (1) Dry-type electrolytes, (2) Gel-type electrolytes and (3) Composite type electrolytes. In this investigation, polymer electrolytes are synthesised by the dry type method.
The use of fibre reinforced polymer composites for construction of structural supercapacitors: a review
Published in Advanced Composite Materials, 2023
Jayani Anurangi, Madhubhashitha Herath, Dona T.L. Galhena, Jayantha Epaarachchi
In summary, it is clear that the conflict between the mechanical properties and ionic conductivity of structural electrolytes has become a challenging issue in the development of SSCs [17]. Bicontinuous polymer electrolytes mixed with ionic liquid and inorganic salts have attracted great interest in recent years as this has shown comparatively high ionic conductivity. However, the addition of a high proportion of ionic liquid may inversely affect the load-bearing capabilities. In addition, it has been found that the addition of nanofillers in an optimum amount to the structural electrolyte simultaneously enhances the electrical and mechanical properties. Therefore, more research is essential to find the optimum composition of the bicontinuous polymer electrolytes and evaluate suitable materials for infusion into the epoxy mixture to enhance the multifunctional performance of structural electrolytes in terms of ionic conductivity and mechanical robustness.
Structural and electrical properties of CdS nanocomposite solid films for electrolyte applications
Published in Soft Materials, 2022
The combination of polymer and inorganic materials constitutes the solid polymer electrolyte nanostructure. Polymer electrolyte nanocomposites are studied by researchers intensively due to the formation of new materials, which combine the structural, optical, electrical and mechanical properties.[1,2] Many inorganic semiconducting materials show variety of properties when used with host polymer. Dissolving inorganic salts in polymer, providing a space for ion transportation in solid electrolyte and hence it is called solid polymer electrolyte. The key factors such as interaction between the inorganic salt and the host polymer, ease of making it as a thin film, forming a good electrode/electrolyte contact, etc., can be improved by adding some inorganic salts in host polymers. To improve the quality of the solid polymer electrolytes, some nano inorganic fillers are used. It will improve the electrolyte properties and its mechanical strength. Also, the fillers with high dielectric constant are preferable with the host polymer to overcome the ion-ion association in polymer electrolytes. Adding inorganic materials not only improves the conductivity but also the stability of the polymer.[3,4]