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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Indonesian Journal of Chemistry Makara Journal of Science Environmental and Materials Bulletin of Chemical Reaction Engineering & Catalysis Sainsmat : Jurnal Ilmiah Ilmu Pengetahuan Alam
Iman Abdullah
Department Of Chemistry, Faculty Of Mathematics And Natural Science, Universitas Indonesia, Depok 16424, Indonesia
Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Energy Engineering Physics

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Increasing energy density of vanadium redox flow batteries: A comprehensive review Sabeel Ahmed; Iman Abdullah; Yuni Krisyuningsih Krisnandi
Environmental and Materials Vol. 3 No. 2: (December) 2025
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v3i2.2025.1828

Abstract

Background: Vanadium Redox Flow Batteries (VRFBs) represent a leading energy storage technology for renewable integration due to their long cycle life, high safety, and flexible scalability. However, their low energy density and high cost continue to limit widespread adoption. This study aims to synthesize and critically evaluate recent advances in enhancing VRFB performance through innovations in electrode materials, electrolyte chemistry, and membrane design. Methods: This study adopts a comprehensive literature review approach, analyzing theoretical and experimental research published in recent years. The review focuses on advancements in nanostructured electrode surfaces, optimized electrolyte formulations, and functional hybrid membranes. Theoretical insights from materials science and electrochemistry were integrated to establish the correlation between structure, performance, and efficiency. Findings: The reviewed studies reveal that nanostructured and heteroatom-doped electrodes enhance redox kinetics and minimize side reactions, while optimized electrolytes with mixed acids and stabilizers improve vanadium solubility and thermal stability. Hybrid polymer–inorganic membranes effectively reduce vanadium ion crossover and maintain high proton conductivity, thereby increasing coulombic and energy efficiencies. Collectively, these advancements improve power output, reduce self-discharge, and enhance long-term cycling performance, moving VRFBs closer to economic feasibility. Conclusion: Advancements in material design and system optimization are pivotal in overcoming the limitations of conventional VRFBs. Continued research on scalable, low-cost materials, electrolyte recycling, and hybrid integration will further promote sustainable energy storage. Novelty/Originality of this article: This review uniquely integrates material-level and system-level perspectives, offering a holistic understanding of how innovations across components collectively advance high-efficiency, cost-effective, and environmentally sustainable VRFB technology for next-generation renewable energy systems.
Modifikasi Lapisan Difusi dengan Pengikat Silang N,N’Metilenbisakrilamida(MBA) pada Sistem DGT Berbasis Gel dengan Adsorben TiO2 untuk Penentuan Konsentrasi Fosfat di Lingkungan Akuatik Asep Saefumillah; Dhania Dwi Aprianti; Iman Abdullah; Inna Husna
SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam Vol. 2 No. 2 (2013): Volume 2 Nomor 2 (September 2013)
Publisher : Fakultas Matematika dan Ilmu Pengetahuan Alam Universitas Negeri Makassar

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Abstract

High phosphate concentrations in aquatic environments can cause algal bloom that canresult serious problem in aquatic ecosystems. As such, the determination techniques ofphosphate which reflect its bioavailability need to be available in order to know the levelof phosphate concentration in aquatic ecosystem. One of effective method that is currentlyused in the determination of phosphate bioavailability in aquatic environments is aDiffusive Gradient in Thin Films (DGT) technique with TiO2 as a binding layer. In thisresearch, the crosslinking modification of polyacrylamide gel was used as a diffusive gelsin DGT system to improve the selectivity of the orthophosphate adsorption. Thecrosslinker that used for modification is N, N'-methylenebisacrylamide (MBA). Diffusioncoefficient with concentration of crosslinking degree of variation was found that thediffusion coefficient is inversely proportional to the concentration of cross linker. Test ofselectivity DGT diffusive gels with crosslinking MBA done through the calculation of totalphosphate levels in both systems with a competing organic phosphorus compound in theform of phytic acid anions and humic acids. The calculation is done using the systemdeployment within 24 hours and the concentration of crosslinking variation MBA (0,05%,0,2% and 0.3%). Obtained through these calculations show that the diffusive gelcrosslinking MBA with a concentration of 0.3% gave the best selectivity towardsorthophosphate anion. This has been proven through experimental research by usingorganic phosphate as competing species. Concentration of phytic acid and humic acidadsorbed on these systems tend to stagnate despite its concentration increases. This provesthat the diffusive gel MBA 0,3% have skipped a certain threshold in both the organic acids; was only of 28,753μg for phytic acid and 33,177 μg for humic acid. Based on this study itcan be concluded that the degree can be used as a crosslinking on diffusive polyacrylamidegels in DGT system. The use of crosslinked diffusive material can also provide phosphatebioavailability concentration measurements that are more accurate because it is moreselective towards amount of orthophosphate and limting organic phosphate diffused asphytic acid and humic acid which can interfere with analysis of the levels oforthophosphate.
Co-Authors adawiah adawiah, adawiah Agustino Zulys Ahmed, Sabeel Anita Nur Ramadhani Arnia Putri Pratama Asep Saefumillah Dhania Dwi Aprianti Dita Arifa Nurani Fadhilla, Rizkha Fahriansyah, Irsan Inna Husna Khatrin, Irena Mabuchi, Takuya Nasruddin Nasruddin Octaviani, Savitri Putri Nurul Amalia Rahayu, Dyah Utami Cahyaning Riri Andriyanti Riwandi Sihombing Riwandi Sihombing, Riwandi Sabeel Ahmed Savitri Octaviani Soleh Kosela Suminta, Tiara Amalia Uwin Sofyani Widayanti Wibowo Yuni K. Krisnandi Yuni Krisyuningsih Krisnandi Yuni Krisyuningsih Krisnandi