Gel polymer electrolytes (GPEs) hold tremendous potential for advancing high-energy-density and safe rechargeable solid-state batteries, making them a transformative technology for advancing electric vehicles. GPEs offer high ionic conductivity and mechanical stability, enabling their use in quasi-solid-state batteries that combine solid-state interfaces with liquid-like behavior. Various GPEs based on different materials, including flame-retardant GPEs, dendrite-free polymer gel electrolytes, hybrid solid-state batteries, and 3D printable GPEs, have been developed. Significant efforts have also been directed toward improving the interface between GPEs and electrodes. The integration of gel-based electrolytes into solid-state electrochemical devices has the potential to revolutionize energy storage solutions by offering improved efficiency and reliability. These advancements find applications across diverse industries, particularly in electric vehicles and renewable energy. This review comprehensively discusses the potential of GPEs as solid-state electrolytes for diverse battery systems, such as lithium-ion batteries (LiBs), lithium metal batteries (LMBs), lithium–oxygen batteries, lithium–sulfur batteries, zinc-based batteries, sodium–ion batteries, and dual-ion batteries. This review highlights the materials being explored for GPE development, including polymers, inorganic compounds, and ionic liquids. Furthermore, it underscores the transformative impact of GPEs on solid-state batteries and their role in enhancing the performance and safety of energy storage devices.

An overview of recent advancements in anion exchange membranes (AEMs) and their performance in water electrolysis is provided, and the progress of an electrocatalyst for anion exchange membrane water electrolysis (AEMWE) is also discussed.

Centella asiatica (CA) is a medicinal plant widely used in the East, with many of its phytoconstituents remaining unexplored. In this study, compounds were extracted and identified from C. asiatica to determine its medicinal properties. Phytochemical screening was conducted on shoot, callus, and cell suspension extracts, revealing the presence of tannins, flavonoids, terpenoids, saponins, and steroids in all three cultures, with no alkaloids detected. IC50 values were determined to evaluate the antioxidant activity of the extracts, with the highest value observed for cell suspension culture (20 µg/mL), followed by shoot culture (19 µg/mL), and then callus extract (10 µg/mL), with ascorbic acid as the standard at an IC50 value of 26.25 µg/mL. Finally, density functional theory was used to analyze the structure–activity relationships of the identified compounds from C. asiatica extract. The results suggest that ultrasonic-assisted extraction yielded the highest recovery and antioxidant activity, with a scavenging activity of 79%. This study provides valuable insights into the phytochemical composition and antioxidant potential of C. asiatica, which may have implications for its use in traditional medicine and future drug development.

Selective laser sintering (SLS) is an additive manufacturing process that has shown promise in the production of medical devices, including hip cups, knee trays, dental crowns, and hearing aids. SLS-based 3D-printed dosage forms have the potential to revolutionise the production of personalised drugs. The ability to manipulate the porosity of printed materials is a particularly exciting aspect of SLS. Porous tablet formulations produced by SLS can disintegrate orally within seconds, which is challenging to achieve with traditional methods. SLS also enables the creation of amorphous solid dispersions in a single step, rather than the multi-step process required with conventional methods. This review provides an overview of 3D printing, describes the operating mechanism and necessary materials for SLS, and highlights recent advances in SLS for biomedical and pharmaceutical applications. Furthermore, an in-depth comparison and contrast of various 3D printing technologies for their effectiveness in tissue engineering applications is also presented in this review.

Tendril-like functional carbon helices (TLFCHs) was successfully prepared directly from Parthenium hysterophorus using a solvothermal method employing a deep eutectic solvent as both soft template and catalyst. TLFCHs showed significant potential as a host for an enzyme without compromising the catalytic activity.

Solvothermal carbon (STC) has emerged as an exciting functional material for diverse applications. However, designing STCs with tunable properties (for instance shape, chemical functionalities, and surface acidity) for on-demand applications is challenging. Herein, a novel strategy was developed to engineer advanced STCs with different architectures using a glucose-based eutectic system and FeSO₄ under solvothermal conditions. The resulting materials were characterized using different analytical tools, which confirmed the formation of STCs with a defined shape (sheets or spheres depending on the reaction conditions), high surface area (26–175 m² g⁻¹), and highly oxygenated (O/C ratio = 0.41–0.55) functionalities. The nanoscale H-bonding network present in the eutectic system plays a role in the formation of enhanced oxygen functionalities; whereas, the existence of Fe-salt facilitates the construction of a sheet-like morphology with improved surface acidity. Taking advantage of their remarkably high carboxyl content (62.6–87.8 mmol g⁻¹) and Fe-doping (0.11–0.56%), the STCs were successfully employed as microcleaners for the selective removal of cationic pollutants (organic dyes and drugs) and as a catalyst for dye degradation. Under the optimized conditions, the obtained STC showed >95% removal efficiency for cationic pollutants with 90% selectivity (compared to anionic pollutants), high flux and rejection (flux = 603 L m⁻² h⁻¹ and rejection = 96%) and superior adsorptive capacity (q_m = 689.7 mg g⁻¹, which is 3–16 fold higher than that reported for hydrothermal carbon). Both the adsorbed dye and drug were successfully desorbed from the STCs and degraded completely by Fenton catalysis, while the adsorbent maintained >90% removal efficiency during five cycles; thus, demonstrating their utility as active microcleaners. Further, the resulting STCs showed potential as carbocatalysts for the facile reduction of nitrobenzene to aniline with 95% conversion efficiency and 63% yield, and therefore, can also be envisaged as effective carbocatalysts for sustainable catalysis.