Journal of electrochemical science and technology最新文献

The Effect of Obstacle Number, Shape and Blockage Degree in Flow Field of PEMFC on its Performance PEMFC 流场中的障碍物数量、形状和堵塞程度对其性能的影响

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-12-11 DOI: 10.33961/jecst.2023.00535

Zongxi Zhang, Xiang Fan, Wen-Wen Lu, Jian Yao, Zhike Sui

{"title":"The Effect of Obstacle Number, Shape and Blockage Degree in Flow Field of PEMFC on its Performance","authors":"Zongxi Zhang, Xiang Fan, Wen-Wen Lu, Jian Yao, Zhike Sui","doi":"10.33961/jecst.2023.00535","DOIUrl":"https://doi.org/10.33961/jecst.2023.00535","url":null,"abstract":"Proton exchange membrane fuel cell (PEMFC) has received extensive attention as it is the most common hydrogen energy utilization device. This research not only investigated the effect of obstacle number and shape on PEMFC performance, but also studied the effect of the blockage degree in the channel of PEMFC on its performance. It was found that compared with traditional scheme, longitudinally distributed obstacles scheme can significantly promote reactants transfer to catalyst layer, and the blockage degree in the channel effect PEMFC performance most. The scheme with 10 rectangular obstacles in single channel and 60% channel blockage had the best output performance and the most uniform distribution of reactants and products. Obstacle height distribution can significantly affect PEMFC performance, the blockage degree in the whole basin was large, particularly as the channel was blocked to higher degree in region 2 and region 3, higher net power density and better mass transfer effect can be obtained. Among them, the fuel cell with the blockage degree of 40%, 60% and 60% in region 1, region 2 and region 3 have the best PEMFC output performance and mass transfer, the net power density was 29.8% higher than that of traditional scheme.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":"25 7","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139010590","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Temperature-Dependent Mn Substitution Effect on LiNiO2 锰对 LiNiO2 的温度替代效应

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-12-11 DOI: 10.33961/jecst.2023.00787

Seungjae Jeon, Sk. Khaja Hussain, Jin Ho Bang

引用次数: 0

Revolutionizing Energy Storage: Exploring Processing Approaches and Electrochemical Performance of Metal-Organic Frameworks (MOFs) and Their Hybrids 能源存储的革命性变革：探索金属有机框架 (MOF) 及其混合体的加工方法和电化学性能

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-11-30 DOI: 10.33961/jecst.2023.00619

Wajahat Khalid, M. R. Abdul Karim, M. Marwat

{"title":"Revolutionizing Energy Storage: Exploring Processing Approaches and Electrochemical Performance of Metal-Organic Frameworks (MOFs) and Their Hybrids","authors":"Wajahat Khalid, M. R. Abdul Karim, M. Marwat","doi":"10.33961/jecst.2023.00619","DOIUrl":"https://doi.org/10.33961/jecst.2023.00619","url":null,"abstract":"The text highlights the growing need for eco-friendly energy storage and the potential of metal-organic frameworks (MOFs) to address this demand. Despite their promise, challenges in MOF-based energy storage include stability, reproducible synthesis, cost-effectiveness, and scalability. Recent progress in supercapacitor materials, particularly over the last decade, has aimed to overcome these challenges. The review focuses on the morphological characteristics and synthesis methods of MOFs used in supercapacitors to achieve improved electrochemical performance. Various types of MOFs, including monometallic, binary, and tri-metallic compositions, as well as derivatives like hybrid nanostructures, sulfides, phosphides, and carbon composites, are explored for their energy storage potential. The review emphasizes the quest for superior electrochemical performance and stability with MOF-based materials. By analyzing recent research, the review underscores the potential of MOF-based superca-pacitors to meet the increasing demands for high power and energy density solutions in the field of energy storage.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":" 10","pages":""},"PeriodicalIF":3.7,"publicationDate":"2023-11-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139197426","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Electrodeposition of Ni–W/Al2O3 Nano-Composites and the Influence of Al2O3 Incorporation on Mechanical and Corrosion Resistance Behaviours 电沉积Ni-W /Al2O3纳米复合材料及Al2O3结合机械和耐腐蚀行为

4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-10-06 DOI: 10.33961/jecst.2023.00577

M. Ramaprakash, R. Nivethida, A. Muthukrishnan, A. Jerom Samraj, M. G. Neelavannan, N. Rajasekaran

{"title":"Electrodeposition of Ni–W/Al2O3 Nano-Composites and the Influence of Al2O3 Incorporation on Mechanical and Corrosion Resistance Behaviours","authors":"M. Ramaprakash, R. Nivethida, A. Muthukrishnan, A. Jerom Samraj, M. G. Neelavannan, N. Rajasekaran","doi":"10.33961/jecst.2023.00577","DOIUrl":"https://doi.org/10.33961/jecst.2023.00577","url":null,"abstract":"Ni–W/Al 2 O 3 nano-composites were electrodeposited on mild steel substrate for mechanical and corrosion resistance applications. This study focused on the preparation of Ni–W/Al 2 O 3 nano-composite coating with various quantity of Al 2 O 3 incorporations. The addition of Al 2 O 3 in the electrolytes were varied from 1–10 g/L in electrolytes and the Al 2 O 3 incorporation in Ni–W/Al 2 O 3 nano-composite coatings were obtained from 1.82 to 13.86 wt.%. The incorporation of Al 2 O 3 in Ni–W alloy matrix influenced the grain size, surface morphology and structural properties were observed. The distributions of Al 2 O 3 particle in alloy matrix were confirmed using electron microscopy (FESEM and TEM) and EDAX mapping analysis. The crystal structure informations were studied using X-ray diffraction method and it confirms that the deposits having cubic crystal structure. The better corrosion rate (0.87 mpy) and microhardness (965 HV) properties were obtained for the Ni–W/Al 2 O 3 nano-composite coating with 13.86 wt.% of Al 2 O 3 incorporations.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-10-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135303328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Surface Engineering of GaN Photoelectrode by NH3 Treatment for Solar Water Oxidation 氮化镓光电极NH3处理太阳能水氧化的表面工程

4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-09-27 DOI: 10.33961/jecst.2023.00339

Soon Hyung Kang, Jun-Seok Ha

{"title":"Surface Engineering of GaN Photoelectrode by NH3 Treatment for Solar Water Oxidation","authors":"Soon Hyung Kang, Jun-Seok Ha","doi":"10.33961/jecst.2023.00339","DOIUrl":"https://doi.org/10.33961/jecst.2023.00339","url":null,"abstract":"Photoelectrochemical (PEC) water splitting is a vital source of clean and sustainable hydrogen energy. Moreover, the large-scale H 2 production is currently necessary, while long-term stability and high PEC activity still remain important issues. In this study, a GaN-based photoelectrode was modified by an additional NH 3 treatment (900°C for 10 min) and its PEC behavior was monitored. The bare GaN exhibited a highly crystalline wurtzite structure with the (002) plane and the optical bandgap was approximately 3.2 eV. In comparison, the NH 3 -treated GaN film exhibited slightly reduced crystallinity and a small improvement in light absorption, resulting from the lattice stress or cracks induced by the excessive N supply. The minor surface nanotexturing created more surface area, providing electroactive reacting sites. From the surface XPS analysis, the formation of an N-Ga-O phase on the surface region of the GaN film was confirmed, which suppressed the charge recombination process and the positive shift of E FB . Therefore, these effects boosted the PEC activity of the NH 3 -treated GaN film, with J values of approximately 0.35 and 0.78 mA·cm –2 at 0.0 and 1.23 V RHE , respectively, and an onset potential (V on ) of −0.24 V RHE . In addition, there was an approximate 50% improvement in the J value within the highly applied potential region with a positive shift of V on . This result could be explained by the increased nanotexturing on the surface structure, the newly formed defect/trap states correlated to the positive V on shift, and the formation of a GaO x N 1-x phase, which partially blocked the charge recombination reaction.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135537016","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Degradation Mechanisms of a Li–S Cell using Commercial Activated Carbon 商用活性炭降解锂电池的机理研究

4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-09-20 DOI: 10.33961/jecst.2023.00451

Norihiro Togasaki, Aiko Nakao, Akari Nakai, Fujio Maeda, Seiichi Kobayashi, Tetsuya Osaka

{"title":"Degradation Mechanisms of a Li–S Cell using Commercial Activated Carbon","authors":"Norihiro Togasaki, Aiko Nakao, Akari Nakai, Fujio Maeda, Seiichi Kobayashi, Tetsuya Osaka","doi":"10.33961/jecst.2023.00451","DOIUrl":"https://doi.org/10.33961/jecst.2023.00451","url":null,"abstract":"In lithium–sulfur (Li–S) batteries, encapsulation of sulfur in activated carbon (AC) materials is a promising strategy for preventing the dissolution of lithium polysulfide into electrolytes and enhancing cycle life, because instead of solid–liquid– solid reactions, quasi-solid-state (QSS) reactions occur in the AC micropores. While a high weight fraction of sulfur in S/ AC composites is essential for achieving a high energy density of Li–S cells, the deterioration mechanisms under such conditions are still unclear. In this study, we report the deterioration mechanisms during charge–discharge cycling when the discharge products overflow from the AC. Analysis using scanning electron microscopy and energy-dispersive X-ray spectrometry confirms that the sulfur in the S/AC composites migrates outside the AC as cycling progresses, and it is barely present in the AC after 20 cycles, which corresponds to the capacity decay of the cell. Impedance analysis clearly shows that the electrical resistance of the S/AC composite and the charge-transfer resistance of QSS reactions significantly increase as a result of sulfur migration. On the other hand, the charge–discharge cycling performance under limited-capacity conditions, where the discharge products are encapsulated inside the AC, is extremely stable. These results reveal the degradation mechanism of a Li–S cell with micro-porous carbon and provide crucial insights into the design of a S/AC composite cathode and its operating conditions needed to achieve stable cycling performance.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":"84 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136312773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Effect of Zinc Addition in Filler Metal on Sacrificial Anode Cathodic Protection of Fin-Tube Aluminum Heat Exchanger 填充金属加锌对翅片管铝换热器牺牲阳极阴极保护的影响

4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-09-15 DOI: 10.33961/jecst.2023.00374

Yoon-Sik So, Eun-Ha Park, Jung-Gu Kim

引用次数: 0

Enhancement of Quick-Charge Performance by Fluoroethylene Carbonate additive from the Mitigation of Electrode Fatigue During Normal C-rate Cycling 氟碳酸乙烯添加剂在正常C倍率循环过程中对电极疲劳的缓解提高了快充性能

4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-09-15 DOI: 10.33961/jecst.2023.00661

Tae Hyeon Kim, Sang Hyeong Kim, Sung Su Park, Min Su Kang, Sung Soo Kim, Hyun-seung Kim, Goojin Jeong

{"title":"Enhancement of Quick-Charge Performance by Fluoroethylene Carbonate additive from the Mitigation of Electrode Fatigue During Normal C-rate Cycling","authors":"Tae Hyeon Kim, Sang Hyeong Kim, Sung Su Park, Min Su Kang, Sung Soo Kim, Hyun-seung Kim, Goojin Jeong","doi":"10.33961/jecst.2023.00661","DOIUrl":"https://doi.org/10.33961/jecst.2023.00661","url":null,"abstract":"The quick-charging performance of SiO electrodes is evaluated with a focus on solid electrolyte interphase (SEI)- reinforcing effects. The study reveals that the incorporation of fluoroethylene carbonate (FEC) into the SiO electrode significantly reduced the electrode fatigue, which is from the the viscoelastic properties of the FEC-derived SEI film. The impact of FEC is attributed to its ability to minimize the mechanical failure of the electrode caused by additional electrolyte decomposition. This beneficial outcome arises from volumetric stain-tolerant characteristics of the FEC-derived SEI film, which limited exposure of the bare SiO surface during 0.5 C-rate cycling. Notably, FEC greatly improves Li deposition during quick-charge cycles following aging at 0.5 C -rate cycling due to its ability to maintain a strong electrical connection between active materials and the current collector, even after extended cycling. Given these findings, we assert that mitigating SEI layer deterioration, which compromises the electrode structure, is vital. Hence, enhancing the interfacial attributes of the SiO electrode becomes crucial for maintaining kinetic efficiency of battery system.","PeriodicalId":15542,"journal":{"name":"Journal of electrochemical science and technology","volume":"138 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135437239","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical Analysis of the Effect of a Three-Dimensional Baffle Structure with Variable Cross-Section on the Parallel Flow Field Performance of PEMFC 变截面三维折流板结构对PEMFC平行流场性能影响的数值分析

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-09-04 DOI: 10.33961/jecst.2023.00437

Xuejian Pei, Fa-yi Yan, Jian Yao, He Lu

引用次数: 0

Author Correction: UV-cured Polymer Solid Electrolyte Reinforced using a Ceramic-Polymer Composite Layer for Stable Solid-State Li Metal Batteries 作者更正:使用陶瓷-聚合物复合层增强的uv固化聚合物固体电解质用于稳定的固态锂金属电池

IF 3.7 4区工程技术

Journal of electrochemical science and technology Pub Date : 2023-08-31 DOI: 10.33961/jecst.2022.00829.e1

Hye-Min Choi, S. Jun, Jinhong Lee, Myung-Hyun Ryu, Hyeyoung Shin, Kyu-Nam Jung

引用次数: 0