Article
Materials Science, Multidisciplinary
Keiichiro Maegawa, Hideaki Nagai, Rajesh Kumar, Mohamed M. Abdel-Galeil, Wai Kian Tan, Atsunori Matsuda
Summary: This research investigates the use of microwave-exfoliated porous graphene oxide nanosheets as nanofillers in polybenzimidazole membranes for high-temperature proton-exchange membrane fuel cells. The composite membranes show improved ionic conductivity, stable cell performance, and high power density, with oxygen-containing functionalities playing a crucial role in the formation of the membrane. The presence of reduced graphene oxide nanosheets enhances proton conductivity and thermal stability, leading to a high-temperature PEMFC with high power density and stability.
MATERIALS CHEMISTRY AND PHYSICS
(2023)
Article
Chemistry, Physical
Ghosh Priyanka, Saibal Ganguly, Kajari Kargupta
Summary: In this study, a composite electrolyte membrane of Polybenzimidazole (PBI) with Phosphosilicate nano-network (PPSN) was developed to enhance the proton conductivity, durability, and power generation of high temperature polymer electrolyte membrane fuel cell (HT-PEMFC). The addition of PPSN resulted in improved water uptake, acid doping level, and peak power generation, while maintaining lower voltage decay compared to the pristine PBI membrane.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Physical
Harilal, Avanish Shukla, Prakash Chandra Ghosh, Tushar Jana
Summary: The study successfully enhanced the structural and mechanical stability of pyridine-bridged oxypolybenzimidazole (PyOPBI) membranes in concentrated phosphoric acid, and significantly improved proton conductivity by incorporating bulky substituents and flexible aryl ether backbones. The membranes exhibited good stability and high proton conductivity at high temperatures, attributed to the bulky pendent groups and flexible backbone, showing promising potential for advanced PBI-based HT-PEM fuel cells.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Engineering, Chemical
Kang Geng, Hongying Tang, Qing Ju, Huidong Qian, Nanwen Li
Summary: A novel symmetric sponge-like porous poly[2,2'-(4,4'-oxybis(1,4-phenylene))-5,5-bibenzimidazolesl (OPBI) membrane for high temperature proton exchange membrane fuel cells was successfully fabricated, showing enhanced proton conductivity and dimensional stability compared to dense membranes. The porous membrane exhibited low gas crossover and high peak power density, despite lower single cell durability due to leaching of PA, making it a promising candidate for high temperature proton exchange membrane fuel cells. Further research is aimed at improving PA retention by adjusting pore size and structure.
JOURNAL OF MEMBRANE SCIENCE
(2021)
Article
Chemistry, Physical
Yilser Devrim, Gizem Nur Bulanik Durmus
Summary: The objective of this work is to examine the polybenzimidazole (PBI)/sulfonated graphene oxide (sGO) membranes as alternative materials for high-temperature proton exchange membrane fuel cell (HT-PEMFC). The proton conductivity of composite membranes was considerably enhanced by the existence of sGO filler. Amongst the PBI/sGO composite membranes, the membrane containing 5 wt. % GO (PBI/sGO-2) showed the highest HT-PEMFC performance. After a long-term performance test for 200 h, the HT-PEMFC performance loss was obtained as 9% and 13% for PBI/sGO-2 and PBI membranes, respectively. The improved HT-PEMFC performance of PBI/sGO composite membranes suggests that PBI/sGO composites are feasible candidates for HT-PEMFC applications.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Engineering, Chemical
Ping-Yen Chen, Tse-Han Chiu, Fan-Jie Lin, Jyh-Chien Chen
Summary: Two novel tetraamines have been synthesized, and polybenzimidazoles with outstanding thermal stability, solubility, and oxidative stability have been prepared. The resulting membranes exhibit excellent tensile strength, proton conductivity, and peak power density, making them promising candidates for high-temperature proton exchange membrane fuel cell (HT-PEMFC) applications.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Arijit Ghorai, Sambit Roy, Sovik Das, Hartmut Komber, Makarand M. Ghangrekar, Brigitte Voit, Susanta Banerjee
Summary: A series of sulfonated polytriazoles were synthesized via copper-induced click polymerization, demonstrating high molecular weight, thermal stability, and proton conductivity, with balanced water management and high oxidative stability. Additionally, the membranes showed a hydrophilic-hydrophobic phase-segregated morphology and comparable performance to Nafion 117 in microbial fuel cells.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Xuan Li, Bo He, Ping Li, Shaokun Tang
Summary: In this study, a series of Schiff-base networks (SNWs) with different contents were in situ synthesized in the SPEEK membrane, and then the composite membranes were soaked in sulfonic acid for improved proton conductivity. The proton conductivity of the SPEEK/S-SNW-15 composite membrane can reach 115.53 mS cm(-1) at 80 degrees C and 100% RH, while also exhibiting satisfactory stability and mechanical properties.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Biochemistry & Molecular Biology
Ji Won Heo, Liangliang An, Min Soo Kim, Duck Hyun Youn, Yong Sik Kim
Summary: A novel zwitterion-substituted lignin (ZL) was synthesized and used to fabricate proton exchange membranes. The incorporation of ZL into Nafion membranes improved their ion exchange capacity, thermal stability, and hydrophilicity. The zwitterionic moieties of ZL enhanced proton transport ability, and ZL also improved the chemical durability and oxidation stability of Nafion membranes, showing potential for fuel cell applications.
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
(2023)
Article
Polymer Science
Tushar Kanti Maiti, Jitendra Singh, Subrata Kumar Maiti, Jagannath Majhi, Arihant Ahuja, Manjinder Singh, Anasuya Bandyopadhyay, Gaurav Manik, Sujay Chattopadhyay
Summary: In this study, the introduction of sulfonic acid functionalized graphene oxide (SGO) into Perfluorosulfonic acid (PFSA) membranes improved the glass transition temperature (Tg), mechanical properties, proton conductivity, and single-cell performance. The loading of SGO increased the Tg and modulus of PFSA composite membranes, leading to enhanced proton conductivity and fuel cell performance.
EUROPEAN POLYMER JOURNAL
(2022)
Article
Chemistry, Physical
Vartika Sharma, Prashant Upadhyay, Nehal H. Rathod, Jeet Sharma, Sarthak Mishra, Savan K. Raj, Vimal Kishore, Vaibhav Kulshrestha
Summary: Sol-gel modified sulfonated poly(ether ether ketone) (SPEEK) organosilane-based composite proton exchange membranes were investigated for their suitability in direct methanol fuel cells (DMFCs). The addition of aminopropyl trimethoxysilane (APTES) in different concentrations improved the physico and electrochemical performances of the composite membranes by inducing H-bonding interactions between free -NH2 and -SO3H groups. The Si-SPEEK membrane showed potential as an alternate for DMFCs.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Fatima C. Teixeira, Ana de Sa, Antonio P. S. Teixeira, V. M. Ortiz-Martinez, A. Ortiz, I Ortiz, C. M. Rangel
Summary: The study focused on the development of new Nafion membranes by incorporating aryl- or azaheteroaromatic bisphosphonate compounds as dopants, resulting in enhanced proton conductivity properties compared to commercial Nafion membranes. These doped membranes showed improved performance in fuel cells at different temperatures, with a maximum power output of around 383 mW cm(-2) at 70 degrees C. The membranes also demonstrated potential advantages in restricting gas crossover, as indicated by higher open circuit potentials compared to Nafion membranes under the same conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Hua Tong, Wenjing Hu, Min Fu, Chunli Yang, Zetian Tao
Summary: Nickel-doped barium ferrate with triple conducting ability is developed as cathodes for proton-conducting solid oxide fuel cells (H-SOFCs), showing impressive electrochemical performance at intermediate temperatures. The high electrocatalytic capacity of the nickel-doped barium ferrate cathode is attributed to its significant proton conductivity, which is enhanced by the presence of nickel and the regulated composition and structure of the composite cathode.
Article
Materials Science, Multidisciplinary
Mohammad Bagher Karimi, Fereidoon Mohammadi, Khadijeh Hooshyari, Shokoufeh Jalilzadeh
Summary: The aim of this study is to reduce the tortuosity of proton conductive pathways within polymer electrolyte membranes for anhydrous PEM fuel cells. By incorporating microsize chopped fibers, modified nanosilica, and a deep eutectic solvent into the Nafion matrix, the proton conductive pathways are extended and the conductivity is greatly improved. The measurements show that the Nafion/DES composite membrane with 5 wt% short fibers and 2 wt% nanosilica exhibits super proton conductivity and promising fuel cell performance.
MACROMOLECULAR MATERIALS AND ENGINEERING
(2022)
Article
Materials Science, Ceramics
Nur Wardah Norman, Mahendra Rao Somalu, Andanastuti Muchtar, Nurul Akidah Baharuddin, S. A. Muhammed Ali, Abul Kalam Azad, Jarot Raharjo, Deni Shidqi Khaerudini, Nigel P. Brandon
Summary: Proton-conducting Sr0.6Ba0.4Ce0.9M0.1O3-8 (M = In, Pr, Ga) electrolytes without Zr were synthesized using the glycine-nitrate process for intermediate-temperature solid oxide fuel cell (SOFC) applications. The electrolyte powders were analyzed for thermal decomposition and crystalline structure. The morphological structure, chemical stability, and proton conductivity of the electrolyte pellets were examined. It was determined that Sr0.6Ba0.4Ce0.9In0.1O3-8 is the best electrolyte in terms of sinterability, chemical stability, and proton conductivity.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Medicinal
P. Muthuraja, M. Himesh, S. Prakash, U. Venkatasubramanian, P. Manisankar
EUROPEAN JOURNAL OF MEDICINAL CHEMISTRY
(2018)
Article
Chemistry, Physical
P. Muthuraja, S. Prakash, A. Susaimanickam, P. Manisankar
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2018)
Article
Materials Science, Multidisciplinary
N. Subbulakshmi, S. Radha Krishnan, V. M. Shanmugam, P. Subramanian
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2019)
Article
Biochemistry & Molecular Biology
P. Muthuraja, V. Veeramani, S. Prakash, M. Himesh, U. Venkatasubramanian, P. Manisankar
BIOORGANIC CHEMISTRY
(2019)
Article
Chemistry, Physical
D. Murugesan, S. Prakash, N. Ponpandian, P. Manisankar, C. Viswanathan
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
(2019)
Article
Chemistry, Multidisciplinary
Veeramani Vairaperumal, Muthuraja Perumal, Prakash Sengodu, Saravanakumar Shanumuganthan, Manisankar Paramasivam
Article
Materials Science, Multidisciplinary
S. Prakash, J. Anandha Raj, P. Muthuraja, G. Paruthimal Kalaignan, P. Manisankar
Article
Biotechnology & Applied Microbiology
A. Lakshman Kumar, M. Eashwar, G. Sreedhar, S. Vengatesan, V Prabu, V. M. Shanmugam
Article
Chemistry, Physical
P. Subramanian, K. Juliet Sheela, S. Radha Krishnan, V. M. Shanmugam
JOURNAL OF MOLECULAR STRUCTURE
(2020)
Article
Engineering, Electrical & Electronic
Govindhasamy Murugadoss, Manavalan Rajesh Kumar, Vellaiah Maruthiah Shanmugam
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
(2020)
Review
Chemistry, Applied
Sakamuri Sarath Babu, P. Muthuraja, Pooja Yadav, Purushothaman Gopinath
Summary: Aryl diazonium salts are important organic compounds widely used as arylating agents in photoredox catalysis due to their low redox potential, broad substrate scope, and atom economy. They have been successfully used to introduce aryl groups in many organic transformations and serve as good alternatives for aryl halides and other aryl organometallic reagents. New reactions using aryl diazonium salts are continually emerging, with recent developments in photoredox arylations and their applications being highlighted in this review.
ADVANCED SYNTHESIS & CATALYSIS
(2021)
Article
Chemistry, Physical
Rajaram Rajamohan, Perumal Muthuraja, Chandramohan Govindasamy, Sivakumar Allur Subramanian, Sung Jae Kim, Mani Murali Krishnan, Kuppusamy Murugavel, Yong Rok Lee
Summary: This study focuses on improving the photostability of 2-phenylbenzimidazole-5-sulfonic acid (PBS), one of the leading sunscreen agents, by forming inclusion complexes (IC) with methyl-beta-cyclodextrin (MCD). The IC shows maintained photostability for up to four hours of UV exposure and has potential in promoting its cosmetic application as a UVB sunscreen, as evidenced by biocompatibility tests.
JOURNAL OF MOLECULAR LIQUIDS
(2023)
