Article
Energy & Fuels
A. Cammarata, L. Mastropasqua
Summary: This paper develops analytical equations for calculating the theoretical OCV using the mixed potential theory, using the case of H-2 and CO co-oxidation (or H2O and CO2 co-reduction) in solid oxide cells as a reference case. The results show good agreement with experimental literature data, except for mixtures with relatively large CH4 concentration. A fuel cell polarization model based on the calibration results is also developed to predict the polarization behavior of a SOFC fed with a H-2-H2O-CO-CO2 fuel mixture, indicating that either H-2 or CO may be reduced rather than oxidized via an equivalent water-gas-shift reaction.
FRONTIERS IN ENERGY RESEARCH
(2023)
Article
Biochemistry & Molecular Biology
Laura Navarrete, Chung-Yul Yoo, Jose Manuel Serra
Summary: This work optimized the electrodes and electrolyte of electrochemical cells based on acid salts through different strategies, such as adding epoxy resin to enhance mechanical properties, selecting Ni sponge as active support, and infiltrating oxide nanoparticles to tailor electrode resistance. The selection of a cell supported on the electrode and the addition of an epoxy resin enabled the reduction of electrolyte thickness without compromising mechanical stability.
Article
Chemistry, Physical
L. Almar, N. Bausa, M. Fabuel, S. Escolastico, J. M. Serra
Summary: Four composite materials were investigated as redox-stable electrode backbones, with LSM/BCZY27+Pt/CeO2 showing the best performance. Activation with Pt and CeO2 nanoparticles boosted electrode activity, demonstrating high potential for non-oxidative hydrocarbon conversion.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Jiawei Zhou, Gang Chen, Zhuo Chen, Kai Wei, Guoqing Guan, Shujiang Geng, Abuliti Abudula
Summary: The effects of five different lithium compound electrodes on the electrochemical performance of ceramic fuel cells were studied. The cell with LNCM-811 as the symmetrical electrode showed the highest maximum power density and ionic conductivity. The decrease of Ni content in LNCM resulted in a gradual decrease in power density. The production of a sufficient amount of lithium compound molten salt after reduction is crucial for the outstanding power generation performance of the cell.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Chemistry, Multidisciplinary
Ryo Yonemoto, Rieko Ueda, Akira Otomo, Yutaka Noguchi
Summary: In a light-emitting electrochemical cell (LEC), electrochemical doping facilitates charge injection and recombination emissions, resulting in high electroluminescence (EL) intensity at low driving voltages. In this study, a nanogap LEC (nano-LEC) consisting of a light-emitting polymer (F8BT) and an ionic liquid on a gold nanogap electrode was developed. The device demonstrated high EL intensity and a low threshold voltage at 300K. At low temperatures (<285K), the delayed components of the current and EL were strongly suppressed, indicating the nano-LEC as a promising approach for molecular-scale current-induced light sources.
Article
Chemistry, Multidisciplinary
Ning Wang, Baoyin Yuan, Chunmei Tang, Lei Du, Ruijie Zhu, Yoshitaka Aoki, Weibo Wang, Lixin Xing, Siyu Ye
Summary: This study accelerates the discovery of efficient mixed protonic-electronic conducting oxides by introducing the machine-learning (ML) method and establishing guidelines for rapid and accurate design and development. The experimental results confirmed the predicted data, showing satisfactory electrochemical performances of the PCC with the selected oxide. This research not only developed a promising air electrode for PCC but also opened a new avenue for ML-based development of mixed protonic-electronic conducting oxides.
ADVANCED MATERIALS
(2022)
Review
Nanoscience & Nanotechnology
Aroosa Javed, Paulina Palafox Gonzalez, Venkataraman Thangadurai
Summary: In the 21st century, proton exchange membrane fuel cells (PEMFCs) are a promising source of power generation due to their high efficiency and eco-friendly design. However, the critical component of PEMFCs, proton exchange membranes (PEMs), have drawbacks such as high cost and reduction in proton conductivity at high temperatures. Recent research has focused on modifying PEMs through composite materials to improve their stability and proton conductivity. This article discusses the current developments in membranes for PEMFCs, with emphasis on hybrid membranes based on Nafion, PBI, and other nonfluorinated proton conducting membranes.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Multidisciplinary
Justin C. Bui, Eric W. Lees, Lalit M. Pant, Iryna V. Zenyuk, Alexis T. Bell, Adam Z. Weber
Summary: Electrochemical synthesis using renewable energy to convert feedstocks into chemicals and fuels is promising, but understanding phenomena in porous electrode systems is challenging. Continuum modeling aids in understanding observed behaviors and guiding next-generation device design. Simulating multiscale phenomena in porous electrodes helps understand and improve the performance of electrochemical synthesis devices.
Article
Materials Science, Multidisciplinary
Shiyi Luo, Rui Yang, Yuanjing Meng, Kristina Maliutina, Manish Singh, Te-Wei Chiu, Liangdong Fan
Summary: In this work, a one-step low temperature sintering technology was proposed to prepare doped ceria electrolyte-based solid oxide fuel cells (SOFCs) by adding 3 mol% of Li2O sintering aid. Super low temperature sintering allows the direct application of nanoporous Ni-based cermet anode and hierarchical SrNb0.1Fe0.9O3 cathode with improved catalytic activities, which improves SOFC efficiency.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Multidisciplinary
Priscila Cavassin, Isabelle Holzer, Demetra Tsokkou, Olivier Bardagot, Julien Rehault, Natalie Banerji
Summary: Conjugated polymers are increasingly used as mixed ionic-electronic conductors in various electrochemical applications, and this study investigates the impact of morphology on the electrochemical doping and conductivity of poly(3-hexylthiophene) (P3HT). It is found that bipolarons are formed preferentially in the disordered regions of the polymer, while polarons show a preference for ordered domains. The presence of bipolarons enhances the electronic conductivity in the disordered regions but hinders transport in the ordered regions. This work provides significant advances in understanding the relationship between morphology and electrochemical properties of conjugated polymers.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Cyrille Galven, Valerie Albin, Simon Hubert, Virginie Lair, Armelle Ringuede, Marie-Pierre Crosnier-Lopez, Francoise Le Berre
Summary: Two new acentric oxycarbonates Na6Li4MO4(CO3)(4) (M = W and Mo) with promising potential as electrolytes for electrochemical devices were successfully synthesized. The crystal structures of Na6Li4MO4(CO3)(4) (M = W and Mo) were determined to be acentric cubic P-43m space group. The conductivity of both solid and molten phases showed purely ionic behavior and was comparable to classical molten alkali electrolytes.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Pyeong Kang Yoo, Seok Kim
Summary: The Pt-rGO/Fe-MOF composite material showed excellent electrochemical properties, making it a promising catalyst support for direct methanol fuel cells.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2022)
Article
Chemistry, Physical
Yifei Yang, Rui Sun, Yossef A. Elabd
Summary: In this study, a new template-assisted electrospinning/electrospraying (E/E) technique was developed to fabricate organized-structured nanofiber/nanoparticle electrodes with well-defined 3D hexagonal patterned arrays of various sizes. The 80 mm diameter hexagonal patterned electrodes showed higher fuel cell power densities and electrochemical surface areas compared to random electrodes, with improved mechanical stiffness and platinum utilization. The E/E technique provides a versatile platform for investigating the effect of pattern type and size on fuel cell platinum utilization under ultra-low platinum loadings.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2022)
Article
Multidisciplinary Sciences
Zhiming Bao, Biao Xie, Weizhuo Li, Shenghui Zhong, Linhao Fan, Chasen Tongsh, Fei Gao, Qing Du, Mohamed Benbouzid, Kui Jiao
Summary: This study investigates the cause of cell inconsistency in proton exchange membrane (PEM) fuel cells and proposes a mixed-pathway electrode design to reduce the inconsistency. Simulation and analysis show that mixing pathways in the under-rib region of the electrode is more effective in reducing cell inconsistency, with only a 3.3% sacrifice in performance.
Article
Environmental Sciences
Kalimuthu Jawaharraj, Pawan Sigdel, Zhengrong Gu, Govarthanan Muthusamy, Rajesh Kumar Sani, Venkataramana Gadhamshetty
Summary: Photosynthetic microbial fuel cells (pMFCs) offer a promising solution for treating methanol wastewater. This study investigated the methanol oxidation capabilities of Rhodobacter sphaeroides 2.4.1 in pMFCs with a nickel foam electrode modified with plasma-grown graphene. The results showed that the Ni/Gr electrode exhibited enhanced performance, with lower charge transfer resistance and higher power density compared to the control electrodes.
ENVIRONMENTAL RESEARCH
(2022)
