Article
Energy & Fuels
Toru Uenishi, Masaya Ibe
Summary: Electrically transforming CO2 into useful chemicals is a key strategy for carbon-neutral recycling. However, existing catalysts for CO2 electrolysis lack activity, stability, and selectivity. This study evaluated the effect of surface area on the performance of CO2 electrolysis cells using an anionic membrane electrode assembly, providing guidelines for improving catalytic performance and promoting carbon neutrality efforts.
Article
Chemistry, Physical
Kan Huang, Oscar Morales-Collazo, Zhichao Chen, Tangqiumei Song, Liang Wang, Honghong Lin, Joan F. Brennecke, Hongfei Jia
Summary: The study suggests that the cation structure of ionic liquids has a greater influence on the oxygen reduction reaction activity than the anion structure. Ionic liquid modification can significantly enhance the performance of proton exchange membrane fuel cells in both kinetic and high current density regions.
Article
Chemistry, Physical
Toru Uenishi, Rui Imoto
Summary: To optimize the cathode catalyst layer of MEAs for polymer electrolyte fuel cells, a data-driven model was developed using the physical properties of the catalyst layer to predict performance. Automated feature extraction through image processing and measurement data from electron microscopy images and XRD eliminated variation due to differences among analysts. A sensitivity analysis using the data-driven model revealed that diffusion in the interparticle voids and intra-particle diffusion of carbon aggregates were the key factors for performance improvement.
JOURNAL OF POWER SOURCES
(2023)
Review
Chemistry, Physical
Jujia Zhang, Jin Zhang, Haining Wang, Yan Xiang, Shanfu Lu
Summary: High-temperature polymer electrolyte membrane fuel cells (HT-PEMFCs) have unique advantages, but the control of phosphoric acid content is crucial for their performance. The distribution and migration of phosphoric acid in the electrodes are influenced by various factors, requiring precise regulation in order to construct high-performance HT-PEMFCs.
ACTA PHYSICO-CHIMICA SINICA
(2021)
Article
Nanoscience & Nanotechnology
Qing Gong, Chenzhao Li, Yadong Liu, Jan Ilavsky, Fei Guo, Xuan Cheng, Jian Xie
Summary: The rational design of catalyst layers in a membrane electrode assembly is crucial for high-performance polymer electrolyte membrane fuel cells. This study found that the solvent composition significantly affects the pore structure and performance of the catalyst layer, with the appropriate pore structure and enlarged catalyst/ionomer interface leading to improved MEA performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jingwen Zhang, Hualong Ma, Jun Ma, Meixue Hu, Qihao Li, Sheng Chen, Tianshu Ning, Chuangxin Ge, Xi Liu, Li Xiao, Lin Zhuang, Yixiao Zhang, Liwei Chen
Summary: Alkaline polymer electrolyte fuel cells (APEFCs) are essential energy conversion devices for future renewable energy structures, but their overall performance and long-term stability need improvement. This study presents a fabrication method of a cone-shaped array on the surface of an alkaline polymer electrolyte membrane to improve the overall device performance.
ACTA PHYSICO-CHIMICA SINICA
(2023)
Article
Chemistry, Physical
Soonyong So, Keun-Hwan Oh
Summary: In this study, catalyst ink was prepared using a dispersant with an HLB value of 17. The effects of ionomer-catalyst agglomerate size on ink rheological properties, CL microstructure, and electrochemical performance were investigated. The results showed that the smallest agglomerate size and low PDI were obtained with 1 wt% dispersant content, resulting in well-dispersed ink. The MEA based on the 1 wt% CL exhibited the highest performance due to increased number of channels and back pressure.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Toru Uenishi, Rui Imoto
Summary: Fuel cells using green hydrogen produced from renewable energy are important for carbon dioxide recycling. To optimize the structure of the cathode catalyst layer and improve the performance of polymer electrolyte fuel cells, we conducted a study combining image analysis, numerical analysis, and electrochemical approaches to analyze diffusion characteristics.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Physical
Jinhyuk Lim, Jung Woo Shim, Dong Joon Kim, Jong Seon Park, Junmo Koo, Joon Hyung Shim
Summary: The study demonstrates that coating a zirconia protective layer on the platinum catalyst through atomic layer deposition (ALD) can enhance the performance of polymer electrolyte membrane fuel cells. The analysis shows that even a few ALD cycles can effectively suppress catalyst aggregation and decrease deterioration rate, leading to improved stability and performance of the fuel cell catalysts.
JOURNAL OF POWER SOURCES
(2021)
Article
Electrochemistry
Nancy N. Kariuki, Andrew T. Haug, Jae H. Park, Matthew J. Lindell, Deborah J. Myers
Summary: Ultra-small angle X-ray scattering technique was used to investigate the effects of carbon support type, presence of platinum, and ionomer loading on the microstructure of polymer electrolyte fuel cell catalyst layers. It was found that carbon type, platinum presence, and ionomer loading significantly impact carbon agglomeration, which in turn affects electrode performance.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Chemistry, Physical
Yannick Garsany, Robert W. Atkinson, Benjamin D. Gould, Rachel Martin, Laetitia Dubau, Marian Chatenet, Karen E. Swider-Lyons
Summary: The use of a dual-layer cathode catalyst layer improves the performance of proton exchange membrane fuel cells by boosting maximum power regardless of carbon porosity directionality. At 25% relative humidity, a 20% performance boost is realized with dual-layer cathode CLs. Electrochemical impedance spectroscopy results show that dual-layer catalyst layers aid in water management and reduce kinetic activity losses of the Pt.
JOURNAL OF POWER SOURCES
(2021)
Article
Green & Sustainable Science & Technology
Jae Hyeok Lee, Junmo Koo, Gwon Deok Han, Jun Woo Kim, Hyung Jong Choi, Joon Hyung Shim
Summary: This study evaluates the performance and stability of Pt cathodes treated by infiltrating CeOx onto their surfaces in polymer electrolyte membrane fuel cells. It finds that adjusting the concentration of CeOx on the surface of Pt enhances the catalytic performance of Pt and improves the stability of Pt. The cells using CeOx-Pt cathodes show significantly lower degradation rates compared to cells using untreated Pt cathodes due to the preservation of electrochemically active sites.
INTERNATIONAL JOURNAL OF PRECISION ENGINEERING AND MANUFACTURING-GREEN TECHNOLOGY
(2021)
Article
Electrochemistry
Arturo Sanchez-Ramos, Jeff T. Gostick, Pablo A. Garcia-Salaberri
Summary: Under low Pt loading, maximizing the maximum power density can be achieved by using relatively thin catalyst layers with high carbon volume fraction. Under high Pt loading, higher porosity and pore radius are beneficial despite thicker ionomer films.
JOURNAL OF THE ELECTROCHEMICAL SOCIETY
(2022)
Article
Electrochemistry
Fengmin Du, Tuan Anh Dao, Andreas Bauer, Michael Obermaier, Thomas J. Schmidt, Alin Orfanidi
Summary: This study aims to understand the relationship between carbon corrosion and performance degradation in polymer electrolyte membrane fuel cells. A simplified model is developed to simulate the performance changes during carbon corrosion. The results show that the model accurately describes the voltage losses at different stages of corrosion and reveals the adverse effects of characterization tests on electrochemical active surface area.
ELECTROCHIMICA ACTA
(2022)
Article
Nanoscience & Nanotechnology
Junmo Koo, Heon Jun Jeong, Wonjoon Choi, Joon Hyung Shim
Summary: Platinum-carbon nanotube (CNT) catalysts were evaluated as cathode catalysts for polymer electrolyte membrane fuel cells. Pt catalysts were fabricated using atomic layer deposition on bare or O2 plasma treated CNTs. The morphology of the Pt particles differed on the two types of CNT supports, leading to differences in electrochemical and fuel cell performance. Factors other than geometric features also influenced fuel cell performance.
SCRIPTA MATERIALIA
(2023)
Article
Chemistry, Physical
Hyunuk Kim, Young-Ju Lee, Gu-Gon Park, Seok-Hee Park, Yoon-Young Choi, Yoonjong Yoo
Article
Chemistry, Multidisciplinary
Didem C. Dogan, Sun-Mi Hwang, Eun-Hwa Jang, Sung-Dae Yim, Young-Jun Sohn, Sung-Hyun Kim, Tae-Hyun Yang, Gu-Gon Park
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2015)
Article
Chemistry, Physical
Jue Hu, Kurian A. Kuttiyiel, Kotaro Sasaki, Dong Su, Tae-Hyun Yang, Gu-Gon Park, Chengxu Zhang, Guangyu Chen, Radoslav R. Adzic
Article
Chemistry, Multidisciplinary
Young Jin Sa, Chiyoung Park, Hu Young Jeong, Seok-Hee Park, Zonghoon Lee, Kyoung Taek Kim, Gu-Gon Park, Sang Hoon Joo
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2014)
Article
Chemistry, Physical
Hyunuk Kim, Young-Ju Lee, Dong-Chul Lee, Gu-Gon Park, Yoonjong Yoo
Article
Chemistry, Physical
K. K. Poornesh, Young-Jun Sohn, Gu-Gon Park, Tae-Hyun Yang
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2012)
Article
Chemistry, Applied
YongMan Choi, Kurian A. Kuttiyiel, Joselito P. Labis, Kotaro Sasaki, Gu-Gon Park, Tae-Hyun Yang, Radoslav R. Adzic
TOPICS IN CATALYSIS
(2013)
Article
Multidisciplinary Sciences
Jae Yeong Cheon, Taeyoung Kim, YongMan Choi, Hu Young Jeong, Min Gyu Kim, Young Jin Sa, Jaesik Kim, Zonghoon Lee, Tae-Hyun Yang, Kyungjung Kwon, Osamu Terasaki, Gu-Gon Park, Radoslav R. Adzic, Sang Hoon Joo
SCIENTIFIC REPORTS
(2013)
Article
Chemistry, Physical
Jahowa Islam, Sang-Kyung Kim, Eunjik Lee, Gu-Gon Park
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2019)
Article
Chemistry, Physical
Jahowa Islam, Sang-Kyung Kim, Kyoung-Hee Kim, Eunjik Lee, Gu-Gon Park
Summary: By coating carbon support with silica, the durability of platinum electrocatalyst to potential cycling can be enhanced. Silica-coated catalysts show better stability, especially in terms of carbon corrosion and platinum particle aggregation.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2021)
Article
Chemistry, Physical
Iksung Lim, Eunjik Lee, Hyun-Uk Park, Jeongyun Jang, Namgee Jung, Tae-Hyun Yang, Sung-Dae Yim, Gu-Gon Park
Summary: The development of highly active and durable electrocatalysts is crucial for the commercialization of polymer electrolyte fuel cells (PEFCs). Core-shell nanoparticles, especially ternary Pt-based ones, have shown promising potential in maximizing Pt utilization and catalytic performance for the sluggish oxygen reduction reaction (ORR). Additionally, post-heat treatment under different gas atmospheres can significantly influence the structural characteristics and catalytic activity of the electrocatalysts.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Multidisciplinary
Didem C. Dogan, Jiye Choi, Min Ho Seo, Eunjik Lee, Namgee Jung, Sung-Dae Yim, Tae-Hyun Yang, Gu-Gon Park
Summary: This study investigates the catalytic performance of Pt nanoparticles supported on MPTO and carbon for ORR, emphasizing the superior catalytic activity and durability of Pt/MPTO due to strong metal-support interaction. By increasing the specific surface area of MPTO, the interaction effect between Pt nanoparticles and MPTO is enhanced, showing potential for the long-term operation of fuel cells.
Article
Chemistry, Physical
Eunjik Lee, Dong-Je Lee, Yujin Kim, Changki Kim, Yongmin Kwon, Hyunjoon Lee, Iksung Lim, Byoeng-Seon An, Tae-Hyun Yang, Gu-Gon Park
Summary: Platinum-based intermetallics are efficient electrocatalysts due to their high catalytic activity and durability. This study developed a facile and efficient synthesis method for intermetallic PtFe@Pt core-shell nanoparticles using ultrasound-assisted coating. The resulting nanoparticles exhibited superior oxygen reduction reaction performance, enhancing the commercial viability of polymer electrolyte fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Kurian A. Kuttiyiel, Shyam Kattel, Shaobo Cheng, Ji Hoon Lee, Lijun Wu, Yimei Zhu, Gu-Gon Park, Ping Liu, Kotaro Sasaki, Jingguang G. Chen, Radoslav R. Adzic
ACS APPLIED ENERGY MATERIALS
(2018)
Proceedings Paper
Electrochemistry
Didem C. Dogan, Sun-Mi Hwang, Sung-Dae Yim, Young-Jun Sohn, Tae-Hyun Yang, Gu-Gon Park
POLYMER ELECTROLYTE FUEL CELLS 13 (PEFC 13)
(2013)
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)