Article
Chemistry, Physical
Sadia Kabir, Tim Van Cleve, Sunilkumar Khandavalli, Samantha Medina, Svitlana Pylypenko, Scott Mauger, Michael Ulsh, K. C. Neyerlin
Summary: This study investigates the impact of local ionomer/platinum interactions and ionomer distribution on ionomer coverage, proton accessibility, and oxygen reduction reaction performance in proton-exchange membrane fuel cells. Different PAA concentrations were found to affect the resulting nanofiber morphology and the ionomer coverage on Pt and carbon within the fibers. Higher PAA concentration resulted in conformal coating of ionomer on the exterior of the fiber, leading to lower overall ionomer coverage, while lower concentration led to uniform distribution of ionomer within the fibers, increasing ionomer coverage and proton accessibility.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Sung Yul Lim, Santiago Martin, Guohua Gao, Yibo Dou, Soren Bredmose Simonsen, Jens Oluf Jensen, Qingfeng Li, Kion Norrman, Shao Jing, Wenjing Zhang
Summary: The expedited conversion of O-2 to H2O with minimal amounts of Pt is crucial for the wide applicability of PEM fuel cells. Developing a process for catalyst management is essential to avoid unnecessary catalyst loss while enhancing Pt utilization, catalytic activity, and durability. The fabrication of self-standing nanofiber electrodes using electrospinning simplifies the operation of cell devices and reduces Pt loss, showing excellent performance due to the synergistic interaction between Pt-Co and Co-N-x nanoparticles.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Sunilkumar Khandavalli, Nisha Sharma-Nene, Sadia Kabir, Samrat Sur, Jonathan P. Rothstein, Kenneth C. Neyerlin, Scott A. Mauger, Michael Ulsh
Summary: The concentration of PAA carrier polymer affects the microstructure and rheological properties of catalyst inks for polymer-electrolyte membrane fuel cells. Both ionomer and PAA stabilize catalyst particles against agglomeration. Increasing PAA concentration enhances particle stability and extensional viscosities of inks, promoting the formation of uniform nanofibers. However, excessive PAA concentration can lead to increased shear viscosities and defective fiber morphologies.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Chemistry, Physical
Sangwon Lee, Jeong Hwa Park, Kang Taek Lee, Young-Wan Ju
Summary: A Ni-Fe fiber anode was designed and fabricated by electrospinning, showing improved anodic activity and resistance to metallic particle coarsening compared to traditional Ni-Fe spherical powder. Single cells using this fiber anode demonstrated higher maximum power densities and lower resistance, suggesting that the introduction of Ni-Fe fiber anode in SOFCs is an effective approach to enhance power generation properties and stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Ceramics
Xiaojiao Zhang, Jiao Li, Lu Wang, Xue Guo, Haibin Sun, Hua Zhang, Qiangqiang Hu
Summary: In this study, perovskite La0.8-xBixSr0.2FeO3-delta (LBSF, x = 0.0-0.5) nanofibers were prepared with great crystallinity by electrospinning method and utilized as cathodes for intermediate temperature solid oxide fuel cells (ITSOFCs). LBSF4 cathode demonstrated the best performance with high polarization resistance and maximum power density. The incorporation of Bi element in LBSF4 improved its catalytic activity, making it promising as a cathode material in IT-SOFCs.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Textiles
Rumbidzai E. Zizhou, Ahmet Cay, E. Perrin Akcakoca Kumbasar, C. Ozgur Colpan
Summary: This study investigated the electrospinning of PVA/Nafion (R) nanofibers and evaluated their stability for use in direct methanol fuel cells under simulated conditions. The thermally stabilized nanofibrous membrane showed good stability against water, methanol, and oxidative effects. The membranes exhibited successful stabilization and sulfonation, preserving the nanofibrous structure even after treatments.
JOURNAL OF INDUSTRIAL TEXTILES
(2021)
Article
Polymer Science
Xingxu Gao, Lei Sheng, Xin Xie, Ling Yang, Yaozong Bai, Haoyu Dong, Gaojun Liu, Tao Wang, Xianli Huang, Jianping He
Summary: In this study, a PVDF nanofiber membrane with high thermal stability was prepared by electrospinning method, and the relationship between nanofiber morphology and electrochemical performance was examined in detail. It was found that the PVDF nanofiber membrane prepared from a spinning solution with a concentration of 24 wt% exhibited better cycling stability and ionic conductivity, indicating its potential for enhancing the safety of high-energy-density batteries.
JOURNAL OF APPLIED POLYMER SCIENCE
(2022)
Article
Energy & Fuels
Chao-Yang Huang, Min-Hsing Chang
Summary: The centrifugal electrospinning method is utilized to fabricate Pt nanowires with good morphology and excellent performance in PEMFC. By optimizing system parameters, the production rate of nanowires is significantly increased, showing better comparability and durability than traditional methods.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Shiquan Guo, Jiaona Wang, Fei Chen, Yaxin Sun, Yuanfeng Liu, Le Wang, Congju Li
Summary: This article reports a scalable synthesis of carbon nanofiber supported hollow beaded nanocage with accessible Co-Nx sites, originated from zeolitic imidazolate frameworks (ZIFs) and polyacrylonitrile (PAN). The modified Co-Nx sites in the formed samples exhibit superior oxygen reduction reaction (ORR) activity, showing promising potential as ORR catalysts for microbial fuel cell (MFC) and direct methanol fuel cell (DMFC). The maximum power densities of MFC decorated with PAN-Co-ZIF-8-C-A and PAN-Co/ZIF-8-C-A achieve 869.6 and 888.3 mW cm-2, which are 1.17 and 1.19 times higher than that of Pt/C. Additionally, the PAN-Co/ZIF-8-C-A modified DMFC exhibits a comparable power density of 23.27 mW cm-2 close to Pt/C electrode (25.63 mW cm-2). The impressive catalytic performances can be attributed to hierarchical porosity, high conductivity, and well-tuned Co-Nx sites.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Nanoscience & Nanotechnology
Hassan Javed, Axel Knop-Gericke, Rik V. Mom
Summary: Potential spikes during start-up and shutdown of fuel cells cause platinum electrocatalyst degradation. In this study, XPS is used to investigate the oxidation states of platinum during fuel cell operation and it is found that a mixed surface oxide is formed at high potentials. The description of platinum oxidation is valid during transient conditions of fuel cell start-up and shutdown.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Applied
Mengzheng Ouyang, Antonio Bertei, Samuel J. Cooper, Yufei Wu, Paul Boldrin, Xinhua Liu, Masashi Kishimoto, Huizhi Wang, Max Naylor Marlow, Jingyi Chen, Xiaolong Chen, Yuhua Xia, Billy Wu, Nigel P. Brandon
Summary: This study quantitatively evaluated the contribution of the dual-phase boundary to MIEC electrodes and proposed a new Ni/CGO fiber-matrix design strategy, demonstrating lower polarization resistance compared to traditional electrodes.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Engineering, Environmental
Suleiman M. Abu-Sari, Bee Chin Ang, Wan Mohd Ashri Wan Daud, Muhamad Fazly Abdul Patah
Summary: This study investigated the effects of sulfur, calcination temperature, and structure on the texture-photoelectronic characters and performance of g-C3N4. S-doped g-C3N4 nanofiber showed a significant improvement in the H2 evolution rate compared to S-doped g-C3N4 bulk. The enhanced photocatalytic activity of SCNF samples was attributed to their unique photoelectronic-texture feature.
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
(2023)
Article
Chemistry, Physical
Naeimeh Rajabalizadeh Mojarrad, Bilal Iskandarani, Adnan Tasdemir, Alp Yurum, Selmiye Alkan Gursel, Begum Yarar Kaplan
Summary: Novel nanofiber-based hybrid proton conducting membranes were fabricated using electrospinning method, with P(VDF-TrFE) as the carrier polymer. The membranes showed superior proton conductivity compared to membranes with PVDF carrier polymer under the same conditions.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Multidisciplinary
Asep Muhamad Samsudin, Michaela Roschger, Sigrid Wolf, Viktor Hacker
Summary: Anion exchange membrane fuel cells (AEMFCs) have gained considerable attention in recent years. This study prepared and characterized polymer composite membranes composed of quaternary ammonium poly(vinyl alcohol) (QPVA) and poly(diallyldimethylammonium chloride) (PDDA). The influence of QPVA/PDDA mass ratios on the membranes and fuel cells was evaluated, and the best performance was achieved with the eQP-PDD0.5 membrane at 80 degrees C.
Article
Polymer Science
Polina A. Yurova, Viktoria R. Malakhova, Ekaterina Gerasimova, Irina A. Stenina, Andrey B. Yaroslavtsev
Summary: The low chemical durability of proton exchange membranes limits their lifetime in fuel cells, but introducing ceria nanoparticles can improve performance. Hybrid membranes based on Nafion-117 membrane and sulfonic or phosphoric acid functionalized ceria were synthesized for the first time, with membranes containing sulfonic acid modified ceria showing increased conductivity at 30% RH. Fuel cells using membranes with ceria synthesized from cerium (IV) sulfate exhibited significantly higher peak power density compared to pristine Nafion-117 membranes.
Article
Polymer Science
Kelly M. Meek, Rui Sun, Carl Willis, Yossef A. Elabd
Article
Polymer Science
Tzu-Ling Chen, Rui Sun, Carl Willis, Brian F. Morgan, Frederick L. Beyer, Yossef A. Elabd
Article
Chemistry, Physical
Monica Hwang, Yossef A. Elabd
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Polymer Science
Rui Sun, Yossef A. Elabd
Article
Polymer Science
Rui Sun, Kelly M. Meek, Hoi Chun Ho, Yossef A. Elabd
POLYMER INTERNATIONAL
(2019)
Article
Engineering, Chemical
Patrick M. Lathrop, Zhaoyang Duan, Chen Ling, Yossef A. Elabd, Costas Kravaris
Article
Chemistry, Physical
Yawei Li, Tim Van Cleve, Rui Sun, Ramchandra Gawas, Guanxiong Wang, Maureen Tang, Yossef A. Elabd, Joshua Snyder, K. C. Neyerlin
ACS ENERGY LETTERS
(2020)
Article
Polymer Science
Tzu-Ling Chen, Patrick M. Lathrop, Rui Sun, Yossef A. Elabd
Summary: In this study, styrene-based poly(ionic liquid) (PIL) diblock copolymers and their analogous PIL homopolymers were synthesized with different covalently attached cations and counteranions. Solid polymer electrolytes (SPEs) were prepared by mixing the polymer with corresponding salts under various salt concentrations, and the impacts of lithium salt concentration and cation/anion chemistry on electrochemical, morphological, transport, and physical properties were explored. The results indicate that SPEs with the MIm(+)/FSI- ion pair exhibit the highest conductivity and electrochemical stability compared to other SPEs.
Article
Polymer Science
Rui Sun, Mahesh Agrawal, Kenneth C. Neyerlin, Joshua D. Snyder, Yossef A. Elabd
Summary: This study reports the synthesis of proton-conducting sulfonated poly(ionic liquid) block copolymers (S-PILBCPs) and showcases their potential as ionomers for proton exchange membrane fuel cells (PEMFCs).
Article
Engineering, Chemical
Yifei Yang, Roger Tocchetto, Kevin Nixon, Rui Sun, Yossef A. Elabd
Summary: This study evaluated the performance of sulfonated pentablock terpolymer (NEXAR(R)) membranes with different ion exchange capacities in PEM electrolytic dehumidification. The results showed that NEXAR(R) membranes had higher water removal energy efficiency and water vapor transmission rate compared to the benchmark Nafion membrane, but the higher ion exchange capacity resulted in higher water sorption and lower energy efficiency. Concurrently applied potential resulted in higher water removal energy efficiency. Overall, this study suggests that NEXAR(R) membranes are a promising alternative to Nafion in PEM electrolytic dehumidification.
JOURNAL OF MEMBRANE SCIENCE
(2022)
Article
Polymer Science
Kevin Nixon, Rui Sun, Yossef A. Elabd
Summary: In this study, 3-, 4-, and 6-arm star poly(vinylbenzyl methylimidazolium chloride) were synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization with a core-first approach, resulting in uniform number and length of polymer arms. The effect of initial radical initiator concentration and number of functional groups per multifunctional RAFT agent on polymerization reaction kinetics was investigated. Increasing the initial radical initiator concentration led to faster monomer conversion, while decreasing the number of functional groups per multifunctional RAFT agent resulted in a decrease in the initial rate retardation in reaction kinetics. This work demonstrates a facile method for synthesizing ion-containing star polymers with uniform number and length of polymer arms, showing potential as a new material for electrochemical energy devices due to property enhancements associated with their star polymer architecture.
Article
Materials Science, Multidisciplinary
Monica Hwang, Muizz O. Karenson, Yossef A. Elabd
ACS APPLIED POLYMER MATERIALS
(2019)
Review
Chemistry, Physical
Yossef A. Elabd
MOLECULAR SYSTEMS DESIGN & ENGINEERING
(2019)
Meeting Abstract
Chemistry, Multidisciplinary
Yossef Elabd, Kelly Meek, Rui Sun, Monica Hwang, Tzu-Ling Chen, Carl Willis
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Meeting Abstract
Chemistry, Multidisciplinary
Rui Sun, Yossef Elabd
ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY
(2018)
Article
Electrochemistry
Abdul Qayoom Mugheri, Shaista Khan, Ali Asghar Sangah, Aijaz Ahmed Bhutto, Muhammad Younis Laghari, Nadeem Ahmed Mugheri, Asif Ali Jamali, Arsalan Ahmed Mugheri, Nagji Sodho, Abdul Waheed Mastoi, Aftab Kandhro
Summary: Green hydrogen has the potential to transition to a pollution-free energy infrastructure. This study proposes a solution to produce hydrogen during the photoelectrochemical process, offering greater stability and control over chemical reactions. Techno-economic assessments show the efficiency and economic feasibility of co-producing value-added chemicals to enhance green hydrogen production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Danpeng Cheng, Wuxin Sha, Qigao Han, Shun Tang, Jun Zhong, Jinqiao Du, Jie Tian, Yuan-Cheng Cao
Summary: LiNixCoyMn1-x-yO2 (NCM) is a critical cathode material for lithium-ion batteries in electric vehicles. The aging of cathode/electrolyte interfaces leads to capacity degradation and long-term cycle instability. A novel neural network model called ACGNet is developed to predict electrochemical stability windows of crystals, allowing for high-throughput screening of coating materials. LiPO3 is identified as a promising coating material with high oxidation voltage and low cost, which significantly improves the cycle stability of NCM batteries. This study demonstrates the accuracy and potential of machine learning in battery materials.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
P. Mohana, R. Yuvakkumar, G. Ravi, S. Arunmetha
Summary: This study successfully fabricates a non-noble CuO/NiO/rGO nanocomposite and investigates its electrocatalytic performance for oxygen evolution reaction in alkaline environment. The experimental results demonstrate that the electrocatalyst exhibits high activity and good stability, offering a new synthetic approach for sustainable energy production.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Qiong Qu, Jing Guo, Hongyu Wang, Kai Zhang, Jingde Li
Summary: In this study, a bifunctional electrode host design consisting of carbon nanofibers implanted ordered porous Co-decorated Al2O3 supported on carbon nanotube film (CNTF) was proposed to address the shuttling effect of lithium polysulfides (LiPSs) and dendrite formation of metal lithium anode in lithium-sulfur (Li-S) batteries. The electrode exhibited excellent conductivity, efficient confinement of LiPSs, and catalytic conversion performance, resulting in high initial capacity and good capacity retention during cycling. As an anode, the electrode showed excellent Li+ diffusion performance and uniform lithium growth behavior, achieving a dendrite-free lithium electrode. The flexible pack cell assembled from these electrodes delivered a specific capacity of 972 mAh g(-1) with good capacity retention.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Hong Zhang, Jin-Peng Yu, Chen Chen, Cheng-Yong Shu, Guang-Yu Xu, Jie Ren, Kai Cui, Wen-Fang Cai, Yun-Hai Wang, Kun Guo
Summary: Spray coating of acetylene black nanoparticles onto stainless steel mesh can enhance its biofilm formation ability and current density, making it a promising electrode material for microbial electrochemical systems. The spray coating method is simple, cost-effective, and suitable for large-size stainless steel electrodes.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Binpeng Hou, Jingjin Chen, Li-Hong Zhang, Xiaowen Shi, Zizhong Zhu
Summary: The electrochemical performance of Li1.20Mn0.44Ni0.32Co0.04O2 and its oxygen-deficient phase Li1.20Mn0.44Ni0.32Co0.04O1.83 was studied through first-principles calculations. The results show that the oxygen-deficient phase has a higher theoretical capacity but lower voltage platform and higher chemical activity compared to the pristine phase.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Yating Du, Sayoko Shironita, Daisuke Asakura, Eiji Hosono, Yoshitsugu Sone, Yugo Miseki, Eiichi Kobayashi, Minoru Umeda
Summary: This study investigates the effect of high- and low-temperature environments on the charge-discharge performance of a Li-ion battery. The deterioration mechanisms of the battery at different temperatures are analyzed through various characterization techniques. The results indicate that the battery performance deteriorates more significantly at a low-temperature environment of 5 degrees C compared to higher temperatures. The understanding of the deterioration mechanisms can contribute to the development of safer battery usage methods.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Si-Si Shi, Zhi-Xiang Yuan, Fei Zhang, Ping Chen
Summary: In this study, a new nano-electrocatalyst was prepared, which exhibited superior electrocatalytic activity for the reduction of NO2- to ammonia in a neutral electrolyte, potentially due to the synergistic enhancement between Co3O4-x and Co.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Berna Dalkiran, Havva Bekirog
Summary: This study reports the use of deep eutectic solvents (DES) based on ethylene glycol and urea as low-cost and green electrolytes for enhancing electrochemical detection of natural antioxidants. The study successfully developed a disposable and effective electrochemical sensing platform for simultaneous determination of ascorbic acid (AA) and gallic acid (GA) using NaOH nanorods on a pencil graphite electrode. The proposed electrode showed improved analytical performance, with higher peak currents and shifted oxidation potentials in DES compared to BR buffer medium.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Sijun Ren, Jianguo Huang
Summary: In this study, a novel bio-inspired nanofibrous WO3/carbon composite was synthesized using a facile hydrothermal method. The three-dimensional network structure of the composite alleviated the volume expansion of WO3 nanorods and enhanced the charge-transport kinetics. The optimized composite exhibited superior lithium storage properties.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Zhilong Zheng, Yu Chen, Hongxia Yin, Hengbo Xiao, Xiangji Zhou, Zhiwen Li, Ximin Li, Jin Chen, Songliu Yuan, Junjie Guo, Haibin Yu, Zhen Zhang, Lihua Qian
Summary: This study found that interstitial Zn cations in CoMoO4 can modulate the dissolution kinetics of Mo cations and improve the OER performance. The interstitial Zn cations can prevent the dissolution of Co cations at high potential, enhancing the durability of the catalyst.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Xiaobo Lin, Shern R. Tee, Debra J. Searles, Peter T. Cummings
Summary: Molecular dynamics simulations using the constant potential method were used to investigate the charging dynamics and charge storage of supercapacitors. The simulations revealed that the water-in-salt electrolyte exhibited the highest charge storage and significantly higher capacitance on the negative electrode. The varying contributions of different electrode regions to supercapacitor performance were also demonstrated.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Wiktoria Lipinska, Vita Saska, Katarzyna Siuzdak, Jakub Karczewski, Karol Zaleski, Emerson Coy, Anne de Poulpiquet, Ievgen Mazurenko, Elisabeth Lojou
Summary: The spatial distribution of enzymes on electrodes is important for bioelectrocatalysis. In this study, controlled spatial distribution of gold nanoparticles on Ti nanodimples was achieved. The efficiency of enzymatic O2 reduction was found to be influenced by the size of the gold nanoparticles and their colocalization with TiO2. The highest stability of enzymatic current was observed with the largest gold nanoparticles.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Tariq M. Al-Hejri, Zeenat A. Shaikh, Ahmed H. Al-Naggar, Siddheshwar D. Raut, Tabassum Siddiqui, Hamdan M. Danamah, Vijaykumar V. Jadhav, Abdullah M. Al-Enizi, Rajaram S. Mane
Summary: This study explores a promising self-growth approach for the synthesis of nickel hydroxide (Ni(OH)2) nanosponge-balls on the surface of a nickel-foam (NiF) electrode. The modified NiF electrode, named Ni(OH)2@NiF, shows distinctive nanosponge-ball morphology and demonstrates excellent energy storage capability and electrocatalytic performance in both hydrogen and oxygen evolution reactions.
ELECTROCHIMICA ACTA
(2024)
Article
Electrochemistry
Rafael Del Olmo, Gregorio Guzman-Gonzalez, Oihane Sanz, Maria Forsyth, Nerea Casado
Summary: The use of Lithium-Ion Batteries (LIBs) is becoming increasingly extensive, and it is important to optimize the devices to achieve their maximum practical specific capacity. In this study, mixed ionic-electronic conducting (MIEC) binders based on PEDOT:PSS and PEDOT: PDADMA-TFSI were developed for Li-ion cathodes, and their performance was compared with conventional formulations. The influence of electrode formulations, including the addition of conducting carbon and an Organic Ionic Plastic Cristal (OIPC), was also analyzed. The proposed binders showed improved performance compared to conventional formulations with different electrolyte types and active materials.
ELECTROCHIMICA ACTA
(2024)
