Advanced Gel Polymer Electrolyte for Lithium-Ion Polymer Batteries

Abstract

We report improved performance of Li-ion polymer batteries through advanced gel polymer electrolytes (GPEs). Compared to solid and liquid electrolytes, GPEs are advantageous as they can be fabricated in different shapes and geometries; also ionic properties are significantly superior to that of solid and liquid electrolytes. We have synthetized GPE in form of membranes by trapping ethylene carbonate and propylene carbonate in a composite of polyvinylidene fluoride and N-methylpyrrolidinore. By applying phase-transfer method, we synthetized membranes with micro-pores, which led to higher ionic conductivity. The proposed membrane is to be modified further to have higher capacity, stronger mechanical properties, and lower internal resistance. In order to meet those requirements, we have doped the samples with gold nanoparticles (AuNPs) to form nanoparticle-polymer composites with tunable porosity and conductivity. Membranes doped with nanoparticles are expected to have higher porosity, which leads to higher ion mobility; and improved electrical conductivity. Four-point-probe measurement technique was used to measure the sheet resistance of the membranes. Morphology of the membranes was studied using electron and optical microscopies. Cyclic voltammetry and potentiostatic impedance spectroscopy were performed to characterize electrochemical behavior of the samples as a function of weight percentage of embedded AuNPs.

In Situ Preparation of Crosslinked Polymer Electrolytes for Lithium Ion Batteries: A Comparison of Monomer Systems

“…1 H nuclear magnetic resonance (NMR) spectra were recorded on an Avance III 500 Spectrometer (Bruker Corp. Billerica, MA, USA) at ambient temperature ( 1 H NMR: 500 MHz, 13 C NMR: 126 MHz). For all samples, dimethyl sulfoxide (DMSO-d 6 ) was used as solvent.…”

“…Furthermore, liquid electrolytes with standard chemistry and electrochemical stabilities up to 3.5 V vs. Li/Li + cannot be applied in electrochemical systems using high voltage electrodes (e.g., lithium nickel manganese oxide LiNi 0.5 Mn 1.5 O 4 (LNMO) with an electrochemical stability up to 4.5 V vs. Li/Li + ). Therefore, the development of safer electrolytes has been intensively pursued following different concepts that are summarized in a number of excellent reviews [ 3 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 ]. The concepts included (i) replacement of moisture-sensitive salts with less sensitive conducting salts, e.g., salts with non-coordinating anions with extensive charge delocalization, such as lithium bis(trifluoromethane sulfonyl)imide (LiTFSI) [ 9 , 15 , 16 ]; (ii) substitution of the flammable organic liquids by non-flammable ionic liquids [ 8 , 17 , 18 , 19 , 20 , 21 , 22 ] with negligible vapor pressure [ 23 , 24 ]; (iii) incorporation of conducting salts into a swollen polymer (gel electrolytes) [ 20 , 25 , 26 , 27 ]; (iv) incorporation of conducting salts into dry polymers to yield solid polymer electrolytes, often reported with poly(ethylene oxide) (PEO) as the matrix to yield solid state electrolytes (SSE) [ 28 , 29 ]; (v) substitution of salts with polymers with ionic sites (often polymeric ionic liquids, PIL) [ 7 , 8 , 12 , 30 , 31 , 32 , 33 , 34 , 35 , 36 , 37 ]; (vi) complete replacement of organics by Garnet-type ceramics [ 38 ...…”

Kajian Aplikasi Bahan Dengan Konduktivitas Listrik Tinggi Untuk Meningkatkan Unjuk Kerja Baterai Ion Litium

“…Untuk meningkatkan unjuk kerja pada arus yang besar, dapat digunakan beragam alternatif perekat misalnya kitosan dan polypyrrole. Kitosan mempunyai konduktivitas lebih tinggi dari pada PVdF, karena memiliki gugus fungsi amine di setiap monomernya [65]. Sedangkan polypyrrole memiliki gugus berbasiskan unsur nitrogen yang kuat di setiap monomernya [66].…”

Preparation and characterization of polymer blend electrolyte membranes based on lithium acetate‐complexed carboxymethyl cellulose (CMC) and carboxymethyl chitosan (CMCh) blend

“…Recently, lithium‐ion batteries have been the most preferred energy storage device 1 offering many advantages such as being rechargeable, high energy density, lightweight, having minimal memory effect, and long life cycle 2 . Lithium‐ion batteries have 4 crucial components namely anode, cathode, separator, and electrolyte 3 . The lithium‐ion batteries field researchers now focus on the physical parameters and safety increasing.…”

“…2 Lithium-ion batteries have 4 crucial components namely anode, cathode, separator, and electrolyte. 3 The lithium-ion batteries field researchers now focus on the physical parameters and safety increasing.…”