Article
Environmental Sciences
Vijay Jaswal, J. Rajesh Banu, K. N. Yogalakshmi
Summary: Nano-bedecking of electrode with TiO2 nanoparticles improved power generation and current density in microbial fuel cells (MFCs). Compared to uncoated cathode, a carbon cloth coated with 0.50 mg cm-2 TiO2 nanoparticles showed significantly higher current and power density. The TiO2 modified cathode also increased the removal efficiency of chemical oxygen demand (COD) and nitrogen compounds.
Article
Chemistry, Multidisciplinary
Fandi Ning, Jiaqi Qin, Xiong Dan, Saifei Pan, Chuang Bai, Min Shen, Yali Li, Xuwei Fu, Shi Zhou, Yangbin Shen, Wei Feng, Yecheng Zou, Yi Cui, Yujiang Song, Xiaochun Zhou
Summary: The use of ordered catalyst layers, such as the ordered Nafion array, has shown great potential in reducing catalyst loading and improving fuel cell performance. By optimizing the Nafion solvent, thermal annealing temperature, and stripping mode, a 40 nm diameter ordered Nafion array (D40) was successfully prepared, providing abundant proton transfer channels and a large area for catalyst loading. The fuel cells with D40 demonstrated significantly higher peak power densities and reduced catalyst loading compared to those without the array.
Article
Chemistry, Physical
Ryota Meguro, Hirokazu Ishitobi, Ryo Suto, Toru Mitsuyoshi, Kaito Uehara, Yoshihiro Otsuka, Nobuyoshi Nakagawa
Summary: The performance of free-standing graphene oxide (GO) membranes in fuel cells can be significantly improved by oxidation and modification with vinilsulfonic acid, leading to increased proton conductivity and durability. Specifically treated GOhvsi membrane showed very high in-plane proton conductivities at 30 degrees C and achieved high maximum power densities in H-2-O-2 fuel cells.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Nagendra Prasad Cheluri, Tharanikkarasu Kannan
Summary: The goal of this study is to introduce a new aromatic bulky six-membered sulfo-napthalimide pendant groups into the poly(-oxybenzimidazole) (POBI) main chain. The sulfonated POBI membrane with pendant PDDDBIS groups (SPOBI-100) exhibited a high proton conductivity, outperforming Nafion-117. Moreover, an H2/O2 PEM fuel cell fabricated with the SPOBI-100 membrane achieved superior performance compared to Nafion 117 under the same testing conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
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
Materials Science, Multidisciplinary
Heung Soo Lee, Dong Seok Kim, Dong-Joo Kim, Jae Ho Yang, Ji-Hae Yoon, Yang-Hyun Koo, Kun Woo Song
Summary: The thermal performance of composite UO2 fuel pellets can be significantly improved by adding microsized Mo plates to enhance thermal conductivity, especially when Mo plates are arranged parallel to the main heat transfer flow direction. The enhanced thermal conductivity of UO2 - 3 vol% Mo microplate fuel pellets can reduce the maximum pellet temperature by 149 degrees C compared to conventional UO2 pellets under a linear heat generation rate of 200 W/cm.
JOURNAL OF NUCLEAR MATERIALS
(2021)
Article
Chemistry, Physical
Zhixiang Lian, Feng Chen, Xingbao Song, Dongliang Liao, Kaiping Peng
Summary: In this study, LSZG electrolyte materials were successfully synthesized using the sol-gel method, with smaller particle size and enhanced sintering properties compared to solid-state materials. The LSZG-SG electrolyte showed higher proton conductivity in a humid H+ environment and the addition of a barrier layer inhibited lithium-ion conduction. Solid oxide fuel cells based on LSZG-SG electrolyte demonstrated an open-circuit voltage of 1.0 V and a maximum power density of 17 mW cm(-2) at 600 degrees C.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Biochemistry & Molecular Biology
Sunil Chauhan, Ankit Kumar, Soumya Pandit, Anusha Vempaty, Manoj Kumar, Bhim Sen Thapa, Nishant Rai, Shaik Gouse Peera
Summary: The current study investigated the development and application of lithium-doped zinc oxide impregnated polyvinyl alcohol proton exchange membrane separator in a single-chambered microbial fuel cell. Physiochemical analysis was performed to characterize the synthesized Li-doped ZnO. The optimized PVA-ZnO-Li separator showed higher power generation and improved proton conductivity in the MFC.
Article
Chemistry, Physical
Fandi Ning, Zhi Chai, Xiong Dan, Pei Liu, Qinglin Wen, Saifei Pan, Can He, Yali Li, Hanqing Jin, Wei Li, Pengpeng Xu, Jiafan Chen, Jun Wei, Xiaochun Zhou
Summary: An integrated gas diffusion electrode (GDE) with high conductivity was prepared through skin electroplating, which showed excellent performance in a self-breathing fuel cell. Moreover, skin electroplating provided an effective strategy to improve the specific power density of other energy devices.
Article
Chemistry, Physical
Haoyu Wu, Tianchi Zhou, Bin Wang, Jinli Qiao
Summary: In this work, a novel viscose-based proton exchange membrane (PEM) was fabricated through cationic modification and dyeing treatment. The as-prepared membrane exhibited high proton conductivity and water uptake, making it suitable for applications in fuel cells and other energy-related fields.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Physical
S. Meenakshi, Kapil Sonkar, Sachin Chugh, Rajesh Badhe, G. S. Kapur, S. S. V. Ramakumar
Summary: Membrane Electrode Assembly (MEA) in a Polymer Electrolyte Membrane Fuel Cell (PEMFC) is crucial for the performance of the fuel cell system. This study investigates the degradation of a stack operated MEA and characterizes it using electrochemical and physical methods. The results show that the MEA assembly decomposes at specific temperatures for the Nafion membrane, carbon-supported catalyst, and carbon-based GDL. The degradation is evidenced by the decrease of electrocatalyst surface area and the migration of catalyst particles.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Chemistry, Physical
Subir Paul, Sang-June Choi, Hee Jin Kim
Summary: The incorporation of high-proton-conductive Co-tri MOF improved the proton conductivity of Aquivion (R), resulting in an enhanced cell performance and a 66% increase in proton conductivity compared to the pristine membrane. The effect of Co-tri MOF on the structural morphology and thermal properties of the Aquivion (R) membrane was also investigated.
Review
Materials Science, Multidisciplinary
Junming Dai, Yu Zhang, Gang Wang, Yongbing Zhuang
Summary: High-temperature proton exchange membrane (HT-PEM) fuel cells have more advantages than low-temperature PEM fuel cells, with high conductivity, low humidity operation conditions, adequate mechanical properties, and competitive costs. Currently, phosphoric acid-doped polybenzimidazole is the most successful polymer material for application in HT-PEMs.
SCIENCE CHINA-MATERIALS
(2022)
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
Electrochemistry
Andrei Kulikovsky
Summary: A model for PEMFC cathode impedance is developed, and the transient response of catalyst layer proton conductivity to cell current density variation is analyzed. The results show that this transient conductivity leads to the formation of a low-frequency inductive loop in the Nyquist spectrum.
ELECTROCHEMISTRY COMMUNICATIONS
(2022)
Article
Engineering, Electrical & Electronic
Nguyen Viet Long, Yong Yang, Cao Minh Thi, Le Hong Phuc, Masayuki Nogami
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Engineering, Electrical & Electronic
Nguyen Viet Long, Yong Yang, Cao Minh Thi, Le Hong Phuc, Le Trong Lu, Masayuki Nogami
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Engineering, Electrical & Electronic
Nguyen Viet Long, Yong Yang, Cao Minh Thi, Le Hong Phuc, Masayuki Nogami
JOURNAL OF ELECTRONIC MATERIALS
(2017)
Article
Optics
Ho Van Tuyen, Takamasa Nonaka, Ken-ichi Yamanaka, Pham Minh Chau, Nguyen Thi Quy Hai, Vu Xuan Quang, Masayuki Nogami
JOURNAL OF LUMINESCENCE
(2017)
Article
Chemistry, Multidisciplinary
Masayuki Nogami, Vu Xuan Quang, Takamasa Nonaka, Tadashi Shimizu, Shinobu Ohki, Kenzo Deguchi
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
(2017)
Article
Materials Science, Ceramics
Masayuki Nogami, Nguyen Thi Thai An, Vu Xuan Quang, Yuichi Kato, Yoriko Matsuoka
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2018)
Article
Chemistry, Physical
Masayuki Nogami, Vu Xuan Quang, Shinobu Ohki, Kenzo Deguchi, Tadashi Shimizu
JOURNAL OF PHYSICAL CHEMISTRY B
(2018)
Article
Materials Science, Multidisciplinary
Nguyen Viet Long, Yong Yang, Cao Minh Thi, Le Hong Phuc, Vu Phi Tuyen, Masayuki Nogami
Review
Materials Science, Ceramics
Masayuki Nogami, Xuan Hung Le, Xuan Quang Vu
JOURNAL OF NON-CRYSTALLINE SOLIDS
(2019)
Article
Optics
Vu Phi Tuyen, Vu Xuan Quang, Phan Van Do, Luong Duy Thanh, Nguyen Xuan Ca, Vu Xuan Hoa, Le Van Tuat, Le Anh Thi, Masayuki Nogami
JOURNAL OF LUMINESCENCE
(2019)
Article
Engineering, Electrical & Electronic
Pham Thi Minh Chau, Nguyen Thi Quy Hai, Vu Xuan Quang, Ho Van Tuyen, Masayuki Nogami
JOURNAL OF ELECTRONIC MATERIALS
(2019)
Article
Materials Science, Multidisciplinary
Masayuki Nogami, Le Xuan Hung, Ho Van Tuyen, Vu Xuan Quang
JOURNAL OF MATERIALS SCIENCE
(2019)
Article
Materials Science, Multidisciplinary
Ho Van Tuyen, Masayuki Nogami, Le Xuan Hung
Article
Crystallography
Nguyen Thi Nhat Hang, Yong Yang, Nguyen Quang Thanh Nam, Masayuki Nogami, Le Hong Phuc, Nguyen Huu Tri, Ho Van Cuu, Nguyen Viet Long
Summary: We successfully prepared gold nanoparticles with different shapes and crystal structures using modified polyol methods and design of experiments. The research indicates that the modified polyol methods are of great importance for the practical applications of gold nanoparticles. Additionally, we experimentally discussed the critical nucleation, growth, and formation processes of gold nanoparticles in modified polyol methods and design of experiments.
Article
Materials Science, Ceramics
Masayuki Nogami, Vu Xuan Quang, Ho van Tuyen, Le Xuan Hung
Summary: Rare-earth doped glasses have shown potential applications in light-emitting devices. However, developing silicate glasses with excellent photoluminescence performance remains difficult. In this study, we investigated the reduction of rare-earth ions in doped glasses through heating in a hydrogen gas atmosphere or X-ray irradiation. We successfully synthesized Al2O3-SiO2 glasses doped with Sm3+ and Eu3+ ions, which exhibited strong photoluminescence. The Sm3+ and Eu3+ ions were reduced to their divalent states when heated in hydrogen gas, while only Sm3+ ions were reduced to Sm2+ ions when irradiated with X-rays. It was also found that the reduced Sm2+ ions in the glass could easily be oxidized to Sm3+ ions by heating in air. The fast redox reaction between Sm3+ and Sm2+ ions makes the Sm3+-doped Al2O3-SiO2 glasses suitable for X-ray therapy and sensor applications.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2022)
