High Oxidative Stability Research Articles

Crosslinked polymer electrolytes of high pyridine contents for HT-PEM fuel cells

This report evaluates a new family of pyridine containing aromatic polyether sulfones as polymer electrolytes for high temperature polymer electrolyte membrane fuel cells (HTPEM FCs). The polymers are prepared by high temperature polyetherification reactions, yielding highly soluble polymers even with pyridine contents as high as 90%. Along with the pyridine content, crosslinking density is also tuned, leading to the enhancement of membrane properties such as film integrity, dimensional stability and doping ability in acidic media. The completion of the crosslinking reaction is enabled by a short thermal pre-treatment, preceding the doping step in H3PO4 85%. Both the linear and the crosslinked membranes show high thermal and oxidative stability. Membranes before and after crosslinking are integrated in single cells where their conductivity and performance are monitored, revealing conductivities above 7 × 10−2 S/cm at temperatures higher than 180 °C.

A polycarboxylic/ether composite polymer electrolyte via in situ UV-curing for all-solid-state lithium battery.

A polycarboxylic/ether composite polymer electrolyte derived from two-arm monomer and polyethylene oxide (PEO) was in situ synthesized on the cathode. The composite electrolyte exhibits a high ionic conductivity of 3.6 × 10−5 S cm–1, high oxidation stability, excellent stability towards Li metal and makes Li/LiFePO4 present good cyclic and rate performance at 25°C.

Evaluation of quality parameters and chromatographic, spectroscopic, and thermogravimetric profile of Patauá oil (Oenocarpus bataua)

Abstract The objective of this research was to evaluate the quality parameters and the chromatographic, thermogravimetric, and spectroscopic profile of Pataua oil (Oenocarpus bataua). All analyses were performed according to the Recommended Practices of the American Oil Chemists’ Society (AOCS). The parameters obtained indicate conservation quality standards in accordance with Brazilian legislation. The fatty acid profile shows a predominance of ω-9, ω-6, and ω-3 fatty acids. The thermogravimetric behavior and differential analysis indicated good stability upon gradual temperature increase and the presence of endothermic and exothermic peaks characteristic of thermal and oxidative decomposition at high temperatures only. The spectroscopic profile evidenced long-chain unsaturated fatty acids confirming the fatty acid profile results. It was found that, in general, the Pataua oil has good nutritional and functional quality and high thermal and oxidative stability; therefore it can be considered as a raw material with potential applications in various industries.

Investigation of spray characteristics from waste cooking oil, bio-hydro fined diesel oil (BHD)and n-tridecane in a constant volume chamber

In this study, spray characteristics of waste cooking oil, bio-hydro fined diesel oil and n-tridecane are reported. Bio-hydro fined diesel oil (BHD) is known as a second generation fuel made from bio hydro finning process. The results of chemical properties from the hydro finning process in vegetable oils are nearly the same as diesel oil. BHD has low viscosity and high oxidation stability which is better than the trans-esterification process of biodiesel (FAME). The experiments were conducted in a constant volume chamber in the room temperature for non-evaporating and 400, 500 and 600 K for evaporating. The pressure injections in the room temperature were varied from 50, 100 and 150 MPa. Then, the pressure injection for evaporating was 100 MPa respectively. The results show that the spray tip penetration in non-evaporating and evaporating conditions of waste cooking oil is higher than BHD oil and n-tridecane. Nevertheless, the spray angle of waste cooking oil is smaller than BHD oil and n-tridecane. These results imply due to the high viscosity and density in waste cooking oil.

Oil from Koelreuteria paniculata Laxm. 1772 as possible feedstock for biodiesel production

The aim of this study was to assess the possibility of using Koelreuteria paniculata oil as feedstock in the biodiesel production. This is an invasive type of ornamental plant often found in urban and peri-urban greenery in several US states, Europe and Serbia. The seed of this plant was used for mechanical and solvent extraction. Application of response surface methodology (RSM) enabled the assessment of solvent extraction process parameters, and their optimal values were determined (solvent to cake ratio 18.9 mL·g−1, extraction time 79.6 min, temperature 70 °C and particulate size 0.5 mm). A well-balanced ratio of fatty acids found in K. paniculata oil makes this feedstock adequate for biodiesel production. Methyl esters produced from K. paniculata oil have high oxidative stability (11.3 h, EN 14112), so it is potentially usable as an additive for improvement of fatty acid methyl ester characteristics regarding their low oxidative stability.

Addition of pumpkin peel extract obtained by supercritical fluid and subcritical water as an effective strategy to retard canola oil oxidation

In the present study, the supercritical fluid extraction (SFE) and subcritical water extraction (SWE) methods were used to obtain the pumpkin peel extract. The obtained extracts were compared together. The results showed that total phenol content in the SFE extract (353.5 mg GA/100 g extract) was higher than the SWE extract (213.6 mg GA/100 g extract). However, carotenoid content was higher in the SWE extract (15.22 mg/100 g extract) compared to the SFE extract (11.48 mg/100 g extract). The extracts were added to canola oil at 400 ppm concentration separately and in combined form (SFE+SWE) and TBHQ was added at 100 ppm. The thermal stability of oil samples at the thermal condition of 180 °C was measured using the Rancimat test, conjugated diene and the polar value. The sample containing the combined SFE and SWE extract had the highest oxidative stability, consequently showing higher performance in preventing oil oxidation during the frying process compared to TBHQ. As a result, pumpkin peel extract can be used as a natural antioxidant in edible oils.

Imidazolium functionalized poly(vinyl alcohol) membranes for direct methanol alkaline fuel cell applications

AbstractIn this study, imidazolium functionalized poly(vinyl alcohol) (PVA) was synthesized by acetalization and direct quaternization reaction. Afterwards, composite anion exchange membranes based on imidazolium‐ and quaternary ammonium‐ functionalized PVA were used for direct methanol alkaline fuel cell applications. 1H NMR and Fourier transform infrared spectroscopy data indicated that imidazole functionalized PVA was successfully synthesized. Inductively coupled plasma mass spectrometry data demonstrated that the imidazolium structure was efficiently obtained by direct quaternization of the imidazole group. Composite anion exchange membranes were fabricated by application of the functionalized PVA solution on the surface of porous polycarbonate (PC) membranes. Fuel cell related properties of all prepared membranes were investigated systematically. The imidazolium functionalized composite membrane (PVA‐Im/PC) exhibited higher ionic conductivity (7.8 mS cm−1 at 30 °C) despite a lower water uptake and ion exchange capacity value compared to that of quaternary ammonium. In addition, PVA‐Im/PC showed the lowest methanol permeation rate and the highest membrane selectivity as well as high alkaline and oxidative stability. Dynamic mechanical analysis results reveal that both composite membranes were mechanically resistant up to 107 Pa at 140 °C. The superior performance of imidazolium functionalized PVA composite membrane compared to quaternary ammonium functionalized membrane makes it a promising candidate for direct methanol alkaline fuel cell applications. © 2020 Society of Chemical Industry

A 4.8 V Reversible Li2CoPO4F/Graphite Battery Enabled by Concentrated Electrolytes and Optimized Cell Design

AbstractElevating the voltage of lithium‐ion batteries (currently 3.8 V) is a simple and pragmatic way to achieve high‐density energy storage. Many so‐called “5 V‐class” cathodes have been discovered over the past decade; however, they have been studied below 5 V (vs. Li/Li+) because of the severe oxidation of electrolytes and other cell components. Here, highly reversible charge‐discharge cycling of Li2CoPO4F/graphite full‐cells up to a cut‐off voltage of 5.2 V is demonstrated for the first time. This result is achieved with synergetic effects of an optimized cell design and a newly designed concentrated electrolyte based on LiBF4, propylene carbonate (PC), and fluoroethylene carbonate (FEC). As an electrolyte design rationale, two important properties of high oxidation stability and anode‐passivation ability are clearly allocated for LiBF4 and FEC, respectively. Besides, all other cell components (e. g., conductive carbon, separator, and binder) are reconsidered and customized for use at >5 V. The new concentrated electrolyte and optimized cell design presented here will pave the way for developing over‐5 V rechargeable batteries.

Thermally and Oxidatively Stable Polymer Electrolyte for Lithium Batteries Enabled By Phthalate Plasticization

Solid-state lithium batteries are desirable alternatives to lithium ion batteries given their high theoretical energy densities associated with Li metal anodes and the potentially superior safety from the elimination of flammable liquid electrolytes. Compelling ceramic lithium conductors with ionic conductivities surpassing those of conventional liquid electrolytes have been developed, but they suffer from high fabrication and processing costs. Moreover, achieving intimate solid-solid contact at the electrolyte-electrode interface is challenging. Polymer electrolytes are alternative materials that offer processing ease and the ability to fully infiltrate and wet composite electrodes. Poly(ethylene oxide) (PEO) mixed with lithium salt is the archetypical polymer electrolyte and solid-state cells using LiFePO4 cathode and lithium metal anode have been successfully commercialized. However, a significant limitation of PEO is its low oxidative stability, which restricts its application to lower voltage cathode (e.g. LiFePO4). Thus, polymer electrolytes with higher oxidative stabilities are desperately needed. In previous work, our group investigated hydrogenated nitrile butadiene rubber (HNBR) as a candidate for high-voltage application because of its superior oxidative stability of 5.3 V vs. Li/Li+. This polymer readily dissolves lithium bis(trifluoromethane)sulfonimide (LiTFSI) salt and has a high lithium transference number (0.59 compared to 0.37 for PEO). However, HNBR-LiTFSI suffers from low ionic conductivity (3.6×10-8 S·cm-1 at 20°C), which severely limits transport in full solid-state cells. In this work, phthalates were employed as the plasticizer to increase the conductivity of the HNBR-based electrolyte. FTIR shows that phthalates not only enhance the segmental mobility of the polymer chains but also coordinate with Li+ and participate in the solvation of lithium salt. Phthalates have a broad liquid-phase window preventing potential phase separation in the polymer electrolyte and evaporation at elevated temperatures. Their low HOMOs (e.g. -10.7 eV for di-ethyl-phthalate) should translate to higher oxidative resistance. A series of di-alkyl-phthalate homologues differing in the length of the alkyl branches were investigated in this report. Plasticized polymer electrolytes were prepared by blending HNBR-LiTFSI and a given amount of phthalate in acetone solution, and then casting into a mold and evaporating the volatile acetone. The plasticized electrolyte can withstand 159°C without significant evaporation; the decomposition of HNBR occurs at over 400°C even in a pure O2 environment. The conductivity of HNBR-LiTFSI with di-ethyl-phthalate (up to 20 wt.%) was 7.3×10-7 S·cm-1 at 20°C and 4.4×10-5 S·cm-1 at 70°C. The electrochemical oxidative stability of both HNBR-LiTFSI and plasticized-HNBR-LiTFSI was assessed by linear sweep voltammetry. The oxidation potential was reduced from 5.3 V to 5.2 V vs. Li/Li+ after introducing phthalates. Electrochemical impedance analysis showed that a resistive interface developed between HNBR-based electrolytes and lithium, indicating a chemical incompatibility between HNBR and lithium metal. However, this problem was readily addressed through a laminated electrolyte structure where a layer of PEO/LiTFSI physically separated plasticized HNBR/LiTFSI from direct contact with lithium metal. The effectiveness of this structure was confirmed by over 2000 hours of reversible galvanostatic cycling of symmetric lithium metal electrodes at 70°C.

(Invited) Solid Halide Electrolytes for All-Solid-State Lithium Ion Batteries

In order to realize all-solid-state batteries (ASSBs) with high energy density and high-rate charging/discharging capability that surpass conventional LIBs, development of solid electrolytes (SEs) is one of the utmost remaining issues. The difficulty is that SEs need to satisfy stringent requirements particularly for large scale applications; not only high ionic conductivity, but also high electrochemical stability, chemical stability, and deformability. However, neither sulfide nor oxide SEs satisfy all these requirements by themselves so far.Here, we propose that, considering the electronic and chemical nature of halide anions, halide solid electrolytes (HSEs) have potential to satisfy all the above requirements, and demonstrated that HSEs are indeed suited as an SE material for ASSB application [Ref].The lithium ionic conductivity of cold-pressed powders of the HSEs we developed surpassed 1 mS/cm at room temperature without any additional grain-boundary resistance. Such high ionic conductivity was realized even with close-packed anion sublattices whose ion pathways are unlike those of sulfide or oxide SEs, indicating that the design consideration for ionic conductors varies depeding on the material systems. The bulk-type ASSBs using these new HSE materials exhibited excellent charge/discharge performance with 4 V class cathode active materials without any extra coating; the initial coulomb efficiency over 94% and low interfacial resistance to be less than 10 Ωcm2, indicating high oxidation stability of HSE materials. Moreover, by appropriate selection of cation/anion pairs, electrochemical stability of HSE can be improved so that HSE can work with the anode active materials with Li-metal potential such as graphite.All these characteristics of halide materials clearly indicate that HSEs are promising candidate for ASSB application, in addition to sulfides and oxides, for large scale deployment.[Ref] T. Asano et al., Adv. Mater. 2018, 30, 1803075.

“Positive-negative-negative”: a colloidal delivery system for bioactive compounds

An uncommon “positive-negative-negative” (PNN) colloidal delivery system is made via depositing highly negatively-charged alginate onto the surface of a bilayer emulsion, where the primary and secondary layers are positively and negatively-charged, respectively. The physicochemical and oxidative stabilities, flow behavior, encapsulation efficiency and release profile of curcumin were investigated and compared to those of the primary emulsion and two bilayer emulsions using electrophoresis, light scattering, confocal microscopy, rheology, colorimetry, SPME headspace GC-MS, and UV–visible spectroscopy. At pH 7, the curcumin which was encapsulated using the PNN colloidal delivery system possessed the highest chemical stability compared to all systems tested, with, significantly, the lowest degradation rate per day. The PNN delivery system also showed the greatest physical stability over 21 days of storage period at pH 3 and 5. The PNN colloidal system showed a moderate shear-thinning behavior at pH 5 and 7, while following a typical Herschel-Bulkley flow model at pH 3. The PNN system showed the oxidative stability in the order: pH 7˃pH 5˃pH 3; with the highest oxidative stability at pH 5 compared to the other systems tested. The PNN colloidal delivery system also showed 98.6% encapsulation efficiency at pH 3, in addition to a significantly higher curcumin release kinetics at pH 7, compared to the other systems, indicating improved pH-triggered properties of this system. Overall, the findings of this study suggest that the “positive-negative-negative” system is a more effective pH-targeted delivery system, with higher physicochemical stability over 21 days of storage, than primary and common “positive-negative” bilayer emulsions.

Effects of double emulsion (W1/O/W2) containing encapsulated Murraya koenigii berries extract on quality characteristics of reduced-fat meat batter with high oxidative stability

Double emulsion (DE, W1/O/W2) was prepared using table oil as lipid phase and Murraya koenigii berry (MKB) extract was encapsulated in the internal aqueous phase (W1). Reduced-fat meat batter formulated with this DE showed higher (P < 0.05) emulsion stability, cooking yield, hardness and lightness values whereas shrinkage and redness values were lower (P < 0.05) in comparison to the control samples. The addition of DE led to an increase in the Gʹ (elastic modulus), G″ (viscous modulus), and η* (complex viscosity) values. The samples with encapsulated MKB extract showed lower (P < 0.01) TBARS values in comparison to samples with non-encapsulated extract. The encapsulation of MKB extract prolonged (P < 0.01) the antioxidative effect. The addition of MKB extract had no negative effect on the microstructural (SEM) properties. Overall, the use of DE with encapsulated MKB extract, as a fat replacer, could be a viable strategy for development of reduced-fat meat products with higher oxidative stability which can be maintained for a longer time.

A New Class of Ionically Conducting Fluorinated Ether Electrolytes with High Electrochemical Stability.

Increasing battery energy density is greatly desired for applications such as portable electronics and transportation. However, many next-generation batteries are limited by electrolyte selection because high ionic conductivity and poor electrochemical stability are typically observed in most electrolytes. For example, ether-based electrolytes have high ionic conductivity but are oxidatively unstable above 4 V, which prevents the use of high-voltage cathodes that promise higher energy densities. In contrast, hydrofluoroethers (HFEs) have high oxidative stability but do not dissolve lithium salt. In this work, we synthesize a new class of fluorinated ether electrolytes that combine the oxidative stability of HFEs with the ionic conductivity of ethers in a single compound. We show that conductivities of up to 2.7 × 10-4 S/cm (at 30 °C) can be obtained with oxidative stability up to 5.6 V. The compounds also show higher lithium transference numbers compared to typical ethers. Furthermore, we use nuclear magnetic resonance (NMR) and molecular dynamics (MD) to study their ionic transport behavior and ion solvation environment, respectively. Finally, we demonstrate that this new class of electrolytes can be used with a Ni-rich layered cathode (NMC 811) to obtain over 100 cycles at a C/5 rate. The design of new molecules with high ionic conductivity and high electrochemical stability is a novel approach for the rational design of next-generation batteries.

Extraction of polyunsaturated fatty acids to reduce the iodine number of biodiesel products

In the last ten years, Indonesia has succeeded in realizing the production and commercialization of oxygenated biofuel/bioethanol and bioethanol, even has applied mixing biodiesel into diesel to up to 20%-volume (or known as a B20 mixture). This success has at least helped reduce imports of fuel oil (BBM) such as diesel and gasoline, but no more than 20%. The rest (i.e., at least 80%) must still be imported and will cause severe pressure on the country’s balance of payments because the current volume of fuel imports is no less than 50% of domestic needs. The quality of Indonesian biodiesel products generally still has a high cloud point and low oxidation stability. Diesel engine fuel consists of a mixture of methyl ester fatty acids (FAME: Fatty Acids Methyl Ester). Many constituent components are limited or not large (consist of 7-14 carbons). The essential constituents are the methyl esters of lauric, myristic, palmitic, stearic, oleic, linoleic, and linolenic acids. Methyl esters of polyunsaturated fatty acids (linoleic, linolenic, eleostearic) are inferior because they have a low cetane number and low oxidative stability. While methyl esters of saturated fatty acids have a superior demonic rate but have a high melting point (bad, higher than the requirements given by SNI). Related to the amount of unsaturated fat in biodiesel, it can reduce the quality of biodiesel, such as acid numbers, moisture content, and the emergence of sludge. Based on the current condition of biodiesel quality, to improve the quality of biodiesel produced can be done by reducing the number of unsaturated fats present in the biodiesel product. The initial step that has to be done is separation biodiesel products into saturated biodiesel with the characteristic iodine number <30-40 and unsaturated biodiesel with an iodine number > 70 through a fractionation process. Extraction was carried out using AgNO3 with variations in the ratio of biodiesel feed to solvents. The best ratio of biodiesel:AgNO3 to eliminate the levels of polyunsaturated free fatty acids in biodiesel products is 1:2 with an iodine value of 47.38 gr I2/(100 gr oil)

Regioselective Synthesis of Methyl-Substituted Adamantanes for Promoting Oxidation Stability of High-Density Fuels

Alkyl-adamantane fuels have drawn tremendous attention for aerospace vehicles due to their high density and high oxidation stability. Here we reported a regioselective route to synthesize methyl-su...

Ag-fiber/graphene hybrid electrodes for highly flexible and transparent optoelectronic devices

Transparent conducting electrodes (TCEs) have attracted considerable attention towards the development of flexible optoelectronic devices. In this study, mixed-dimensional TCEs are fabricated based on the two-dimensional graphene and one-dimensional electrospun metal fiber that can address the shortcomings of each electrode. In comparison with other TCEs, the Ag fiber/graphene hybrid electrodes exhibited a highly stable morphology (67% lower peak-to-valley ratio), low sheet resistance (approximately 11 Ω/sq), high transmittance (approximately 94%), high oxidation stability with excellent flexibility, and outstanding chemical stability. The multiple functionalities of the transparent and flexible hybrid structure highlight its potential for applications in emerging electronics and highly stable optoelectronics.

Effect of Chemical Structure and Degree of Branching on the Stability of Proton Exchange Membranes Based on Sulfonated Polynaphthylimides.

Hydrolytic stability and oxidative stability are the core properties of sulfonated polynaphthylimides (SPIs) as proton exchange membranes. The chemical structure of SPIs directly influences the performance. Herein, three different series of branched SPIs were designed and prepared using 1,3,5-tris (2-trifluoromethyl-4-aminophenoxy) benzene as a trifunctional monomer and three non-sulfonated diamine monomers, such as 4,4′-oxydianiline (ODA), 2,2-bis[4-(4-aminophenoxy)phenyl]hexafluoropropane (6FODA), and 4,4′-(9-fluorenylidene)dianiline (BFDA). The effect of the chemical structure and degree of branching on SPIs properties is discussed. The results showed that by controlling the chemical structure and degree of branching, the chemical stability of SPIs changed significantly. SPI-6FODA with two ether linkages and a hydrophobic CF3 group has higher hydrolytic stability than SPI-ODA with only one ether linkage. In addition, with the increase of the introduced B3 monomer, the oxidation stability of SPI-6FODA has been greatly improved. We successfully synthesized SPIs with a high hydrolytic stability and oxidative stability.

The encapsulation of curcumin by whey protein: Assessment of the stability and bioactivity

AbstractAimsThe aims of the present work were to encapsulate curcumin in denaturated whey protein isolate and investigate the physicochemical and morphological properties of whey protein isolate‐based nanoparticles (WPI‐NPs).MethodsScanning electron microscopy (SEM) was used to investigate the morphological properties of WPI‐NPs. The crystalline structure of the developed NPs was evaluated by using an X‐ray diffraction technique. Antiradical activity of pure and loaded curcumin was also tested. in vitro release of curcumin into the simulated stomach and small intestine was evaluated. The stability of pure and encapsulated curcumin against pH and oxidation was compared.ResultsWPI‐NPs had a spherical shape‐like structure with smooth surface. The encapsulation efficiency of curcumin in WPI‐NPs was found to be 93.1%, demonstrating that the encapsulation system used in the present work was effective to entrap curcumin molecules. WPI‐NPs showed more stability at pH 7, indicating that the developed system is suitable for application of beverages with neutral pH. Furthermore, the encapsulation of curcumin into nanoparticles led to improvement of the oxidation stability of curcumin from 10% to 70%. The developed nanoparticles improved the release of curcumin in the simulated gastrointestinal tract. The release of curcumin in simulated gastric medium was low, but in the intestine, most of the curcumins were released in the early hours. The release of curcumin followed non‐Fickian mechanism in the intestine and stomach environment.ConclusionThe developed encapsulation system can be introduced as a viable strategy to improve the bioavailability of curcumin.Practical ApplicationsConsidering the diverse biological activity of curcumin and high oxidation stability of WPI‐NPs, the developed nanoparticles can be used as a valuable additive compound in food and pharmaceutical systems, especially in beverages with neutral pH.

Bio-based Algae Oil: an oxidation and structural analysis.

In search of natural components, vegetal oils are increasingly becoming more popular in cosmetics. However, high oxidation instability, presence of potential allergens and synthetic anti-oxidants have limited their applications so far. Therefore, a need exists for a natural emollient with high oxidation stability. In this work, we report on a novel sustainably produced triglyceride containing primarily three monounsaturated oleic acid chains, dubbed 'Bio-Based Algae Oil' hereafter, as a natural emollient for cosmetic formulations. To produce Bio-Based Algae Oil, simple sugars are converted into triglyceride oils using microalgae fermentation with minimal environmental impact. Bio-Based Algae Oil was compared to other commonly used triglyceride-based emollients in the skincare industry in terms of thermal/oxidation stability, composition and moisturizing properties. Oxidation stability of emollients was compared using Rancimat and pressurized differential scanning calorimetry (PDSC) techniques. Fatty acid composition of each oil was analysed using proton nuclear magnetic resonance (1 H-NMR) and gas chromatography (GC) techniques to correlate unsaturation level of each oil to its oxidation stability. We also conducted an in vivo moisturizing study in which skin hydration level of human subjects was compared before and after application of emollient up to 24h. Results showed that Bio-Based Algae Oil was the most stable emollient in thermal and oxidation stability studies given its low unsaturation and high anti-oxidant content determined by 1 H-NMR and GC techniques. It also provided the highest skin hydration level when applied on skin demonstrating its efficacy as a moisturizing emollient in cosmetic formulations. Compositional analysis of Bio-Based Algae revealed that it is a triglyceride containing primarily three monounsaturated oleic acid chains with very low polyunsaturated fatty acid content resulting in high oxidation stability and consequently prolonged shelf-life. Given its sustainability, high oxidation stability and skin health benefits such as moisturization demonstrated during an in vivo study, we envision to utilize Bio-Based Algae Oil in many cosmetic formulations across skincare, suncare and bath and shower markets.

Highly conductive divalent fluorosulfonyl imide based electrolytes improving Li-ion battery performance: Additive potentiating electrolytes action

Imide-based electrolyte salts are crucial in lithium-ion battery (LIB) research, due to their high oxidative capacity, thermal performance, and cycling stability. LIBs with imide electrolytes exhibit slow charge-discharge (CD) capacity and high efficiency, even though most of these electrolytes show low ionic conductivity (σ). Herein, we have synthesized two highly conductive and pure divalent imide electrolytes, lithium sulfonylbis(fluorosulfonyl)imide (LiSFSI) and lithium (1,3-phenylenedisulfonyl)bis(fluoro sulfonyl)imide (LiPDSFSI), for LIBs application. Compared to LiPDSFSI electrolyte, the LiSFSI imide electrolyte with mixed solvent ethylene carbonate (EC) and dimethyl sulfoxide (DMSO) (75:25 v/v) exhibits better electrochemical stability, σ, transference number (tL+), cycling stability, and high specific capacity of 142 mAhg−1 with the full cell battery configuration of LiFePO4/electrolytes/graphite at 0.1 C. Additionally, lithium bis(fluoro-sulfonyl)imide (LiFSI) (20%), as additive, improve their performance substantially. The results demonstrate that the LiSFSI electrolyte with LiFSI additive shows maximum σ (8.9 mS/cm at 30 °C), tLi+ (0.64), and anodic stability (5.47 V), which concurrently delivers high efficiency and improves specific capacity to 156 mAhg−1 with excellent capacity retention (99.93%) after 500 CD cycles with the full cell LiFePO4/electrolytes/graphite battery system.