Journal of Electrochemical Science and Technology最新文献

{"title":"Morphological Modulation of TiO2 Nanotube via Optimal Anodization Condition for Solar Water Oxidation","authors":"Jiwon Heo, Kai Zhu, Jun‐Seok Ha, S. Kang","doi":"10.33961/jecst.2024.00626","DOIUrl":"https://doi.org/10.33961/jecst.2024.00626","url":null,"abstract":": With the depletion of fossil fuels and the rising global demand for energy, photoelectrochemical (PEC) water splitting presents a promising solution to avert an energy crisis. Titanium dioxide (TiO 2 ), an n - type semiconductor, has gained popularity as a photoanode due to its remarkable PEC properties. Nevertheless, inherent challenges such as a wide band gap (~3.2 eV), charge recombination, and slow oxygen evolution reaction (OER) rates at the surface limit its practical application by constraining light absorption. To overcome these limitations, we have developed TiO 2 nanotubes (NTs) using a facile anodization method. This study examines the impact of anodization growth parameters on solar water oxidation performance. Specifically, TiO 2 NTs with modified anodization time (referred to as TiO 2 -6) showed a 3.5-fold increase in photocurrent density compared to the as-grown TiO 2 NTs. Furthermore, electrochemical analyses, such as electrochemical impedance spectroscopy (EIS), indicated a significant decrease in charge transfer resistance following the adjustment of on-off anodization time. Additionally, the TiO 2 -6 photoanode demonstrated a higher electrochemically active surface area (ECSA) than other samples. Therefore, optimal nanostructuring parameters are crucial for enhancing the PEC properties of TiO 2 NTs. Overall, our findings offer valuable insights for fabricating high-quality TiO 2 NTs photoanodes, contributing to developing efficient PEC systems for sustainable energy production.","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"48 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141807234","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Modified Lithium Borate Buffer Layer for Cathode/Sulfide Electrolyte Interface Stabilization","authors":"Dae Ik Jang, Y. Park","doi":"10.33961/jecst.2024.00591","DOIUrl":"https://doi.org/10.33961/jecst.2024.00591","url":null,"abstract":". All-solid-state rechargeable batteries, using nonflammable sulfide-based solid electrolytes, address lithium-ion battery safety issues while enhancing energy density and operating temperature range. However, the electrochemical stability limitations of sulfide electrolytes present challenges to the interface stability, particularly with oxide-based cathodes. The application of a stable coating layer is known to be effective for stabilizing the cathode/sulfide electrolyte interface. In particular, lithium borate is a promising coating material owing to its cost-effectiveness and efficiency in controlling interfacial reactions. However, lithium borate exhibits oxide characteristics, leading to a difference in the chemical potential of Li + compared to sulfide electrolytes. This discrepancy results in an uneven distribution of Li + ions at the interface, which hinders Li-ion migration during charge and discharge cycles. To address this issue, a lithium borate-coating layer was modified with sulfur via a gaseous reaction involving sulfur. Sulfur-modified lithium borate is expected to reduce the chemical potential difference of Li + and","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"50 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141809690","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Design principles for moisture-tolerant sulfide-based solid electrolytes and associated effect on the electrochemical performance of all-solid-state battery","authors":"Ohmin Kwon, Se Young Kim, Jinyeon Hwang, Jonghyun Han, Seungho Yu, Taeeun Yim, Si Hyoung Oh","doi":"10.33961/jecst.2024.00535","DOIUrl":"https://doi.org/10.33961/jecst.2024.00535","url":null,"abstract":"The grave concern on the safety of Li-ion batteries adopted in commercial electrical vehicles pushes an urgent demand for developing safer all-solid-state batteries (ASSBs), where ion-conducting solid electrolytes play pivotal roles. Much higher conductivity and more ductile nature of sulfide-based electrolytes offers great advantages over conventional oxide materials in terms of manufacturing process difficulty and the battery performance. However, instability of sulfide materials towards atmospheric moisture results in the substantial degradation in the ionic conductivity and the release of hazardous gas. After over a decade of intensive research, various customized strategies based on the specific design rules were developed for each electrolyte to tackle this crucial issue. However, in most cases a moisture tolerance was endowed only after compromising its vital ionic conductivity to some extent. Nevertheless, the actual applications of sulfide electrolytes to ASSBs often lead to improved battery performance by virtue of the interfacial stabilization between oxide-based cathode materials and sulfide-based solid electrolytes. Therefore, it is essential to fully comprehend the critical factors of each atmospheric stabilization technology that potentially affects the eventual battery performance. Herein, we go over the current status of state-of-the-art moisture-stabilizing technologies for each sulfide-based solid electrolyte, summarizing the major effect of each technology on the various aspect of the electrochemical performance upon application. We believe that this review will contribute to achieving effective moisture-stabilization of sulfide-based solid electrolytes, catalyzing the successful commercialization of sulfide-based ASSBs.","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":" 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141678107","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Reuse of the surrounding powder used as a Na-source in the fabrication of sodium-beta–alumina solid electrolyte by vapor-phase conversion method","authors":"Do-Young Go, Ha Young Kim, Keeyoung Jung, Sungki Lim","doi":"10.33961/jecst.2024.00374","DOIUrl":"https://doi.org/10.33961/jecst.2024.00374","url":null,"abstract":"","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"72 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141111831","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Orientational Relationship Between the Solid-Electrolyte Interphase and Li4Ti5O12 Electrode in Hybrid Aqueous Electrolytes","authors":"Tae-Young Ahn, Eunji Yoo, Dongkyu Kim, Jae-Seong Yeo, Junghun Lee, Miseon Park, Wonjun Ahn, Hyeyoung g Shin, Yusong g Choi","doi":"10.33961/jecst.2024.00416","DOIUrl":"https://doi.org/10.33961/jecst.2024.00416","url":null,"abstract":"Lithium-ion (Li-ion) batteries are key to modern society, but they pose safety risks because of thermal runaway and ignition. In this study, we explored the use of hybrid aqueous electrolytes to enhance the safety and performance of Li-ion batteries, focusing on the solid-electrolyte interface (SEI) formed on lithium titanate (Li 4 Ti 5 O 12 ; LTO) electrodes. To achieve this, we employed high-resolution transmission electron microscopy (HRTEM) and density functional theory (DFT) calculations to analyze the microstructure and stability of the SEI layer. Further, we prepared LTO and LiMn 2 O 4 (LMO) electrodes, assembled full cells with hybrid aqueous electrolytes, and carried out electrochemical testing. The HRTEM analysis revealed the epitaxial growth of a LiF SEI layer on the LTO electrode, which has a coherent lattice structure that enhances electrochemical stability. The DFT calculations confirmed the energetic favorability of the LiF-LTO interface, indicating strong adhesion and potential for epitaxial growth. The full cell demonstrated excellent discharge performance, showing a notable improvement in coulombic efficiency after the initial cycle and sustained capacity over 100 cycles. Notably, the formation of a dense, crystalline LiF SEI layer on the LTO electrode is crucial for preventing continuous side reactions and maintaining mechanical stability during cycling. The experimental results, supported by the DFT results, highlight the importance of the orientational relationship between the SEI and the electrode in improving battery performance. The integration of experimental techniques and computational simulations has led to the development of an LTO/LMO full cell with enhanced discharge capabilities and stability. The study provides insights into the growth mechanisms of the SEI layer and its impact on battery performance, demonstrating the potential of hybrid aqueous electrolytes in advancing lithium-ion battery technology. The findings affirm the viability of this approach for optimizing next-generation Li-ion batteries, which can promote the development of safer and more reliable energy storage solutions.","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"71 16","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141121786","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A Functional N/S doped-Carbon Electrode from a Carbonized Bagasse Activated with Water Vapor","authors":"Fitria Rahmawati, Ainaya Febi Amalia, Arikasuci Fitonna Ridassepri, Jun Nakamura, Younki Lee","doi":"10.33961/jecst.2024.00017","DOIUrl":"https://doi.org/10.33961/jecst.2024.00017","url":null,"abstract":"This research used solid waste from sugarcane production, named bagasse, as raw material for a functional carbon electrode. The bagasse was carbonized to produce carbon powder and, following activation with water vapor at 700 o C. The activated carbon was doped with N and S to improve its electrochemical properties by treating it with thiourea precursor and heating it at 850 o C under nitrogen flow to produce N/S doped-carbon (NSCE). The produced carbon was then characterized to understand the specific diffraction pattern, molecular vibrations, and surface morphology. The result found that the NSCE showed two broad diffraction peaks at 23 o and 43 o , corresponding to [002] and [100] crystal planes following JCPDS75-1621. FTIR spectra showed some O-H, C-H, C-O, and C=C peaks. Peaks of C=N, C-N, and S-H demonstrate the presence of N/S within the NSCE. Raman analysis revealed that N/S doping caused structure defects within the single C6 layer networks, providing carbon vacancies ( 𝑉 𝐶 •••• ) because of C replacement by N ( 𝑁 𝐶  ) and S ( 𝑆 𝐶  ). Meanwhile, XPS analysis showed N/S introduction to the C network by revealing peaks at 168.26 eV and 169.55 eV, corresponding to S2p 3/2 and S2p 1/2 , and 171. 95 eV corresponds to C-SO 3 -C, indicating the presence of S within the thiol group attached to the carbon. Meanwhile, N1s are revealed at 402.4 eV and 405.5 eV, confirming pyrrolic nitrogen (N-5) and quaternary nitrogen (N-Q). The electrochemical analysis found that the reaction within the prepared-NSCE/NaClO 4 /Na was reversible, with an onset potential of 0.1 V vs. Na/Na + , explaining the intercalation and deintercalation of sodium ions. The sodium battery full cell showed an excellent battery performance with an initial charging-discharging capacity of 720 mAh/g and 570 mAh/g, respectively, at 0.2C. Meanwhile, a cycling test showed the average Coulombic Efficiency of 84.4 % and capacity retention of 57 % after 50 cycles.","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"12 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140660150","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Voltammetry of Constant Phase Elements: Analyzing Scan Rate Effects","authors":"Hyeonsu Je, Byoung-Yong Chang","doi":"10.33961/jecst.2024.00318","DOIUrl":"https://doi.org/10.33961/jecst.2024.00318","url":null,"abstract":"Here we introduce a new method for characterizing the constant phase element (CPE) in electrochemical systems using cyclic voltammetry (CV), presenting an alternative to the conventional electrochemical impedance spectroscopy (EIS) approach. While CV is recognized for its diagnostic capabilities in electrochemical analysis, it traditionally encounters difficulties in accurately measuring CPE systems due to a lack of clear linearity with scan rates, unlike capacitors. Our research demonstrates a linear relationship between current and scan rate on a log-log plot, enabling the calculation of n and Y 0 values for CPE from the slopes of these linear relationships. For validation of our method, it is applied to two kinds of capacitors and the results agree with those measured by EIS. Although EIS is known to be accurate in measuring CPE systems, our alternative approach offers a","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"42 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140672607","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Empirical Capacity Degradation Model for a Lithium-Ion Battery Based on Various C-Rate Charging Conditions","authors":"Dong Hyun Kim, Juhyung Lee, Kyungseop Shin, Kwang-Bum Kim, Kyung Yoon Chung","doi":"10.33961/jecst.2024.00241","DOIUrl":"https://doi.org/10.33961/jecst.2024.00241","url":null,"abstract":"Lithium - ion batteries are widely used in many applications due to their high energy density, high efficiency, and excellent cycle ability. Once an unknown Li - ion battery is reusable, it is important to measure its lifetime and state of health. The most favorable measurement method is the cycle test, which is accurate but time - and capacity - consuming. In this study, instead of a cycle test, we present an empirical model based on the C - rate test to understand the state of health of the battery in a short time. As a result, we show that the partially accelerated charge/discharge condition of the Li - ion battery is highly effective for the degradation of battery capacity, even when half of the charge/discharge conditions are the same. This observation provides a measurable method for predicting battery reuse and future capacity degradation.","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"2 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140712836","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bulk heterojunction solar cell using Ru dye attached PCBM","authors":"Il-Su Park, Jae-Keun Hwang, Yongseok Jun, Donghwan Kim","doi":"10.33961/jecst.2024.00262","DOIUrl":"https://doi.org/10.33961/jecst.2024.00262","url":null,"abstract":"Ru dye (Z-907) is a crucial photosensitizing material in dye-sensitized solar cells (DSSCs). To enhance the utilization of Ru dye’s photosensitizing properties in bulk heterojunction solar cells, a method was developed to synthesize phenyl-C61-butyric acid methyl ester (PCBM) nanoparticles that are chemically linked to Ru dye. PCBM contains a methoxy (-OCH 3 ) group, whereas Ru dye incorporates a carboxyl group (-COOH) within its molecular structure. By exploiting these complementary functional groups, a successful bond between Ru dye and PCBM was established through an anhydride functional group. The coupling of PCBM with Ru dye results in a modification of the energy levels, yielding lower LUMO (3.8 eV) and HOMO (6.1 eV) levels, compared with the LUMO (3.0 eV) and HOMO (5.2 eV) levels of Ru dye alone. This configuration potentially facilitates efficient electron transfer from Ru dye to PCBM, alongside promoting hole transfer from Ru dye to the conducting polymer. Consequently, the bulk heterojunction solar cells incorporating this Ru dye-PCBM","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"7 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140714958","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Elucidating electrochemical energy storage performance of unary, binary, and ternary transition metal phosphates and their composites with carbonaceous materials for supercapacitor applications","authors":"M. R. Abdul Karim, Waseem Shehzad, Khurram Imran Khan, Ehsan ul Haq, Yousaf Haroon","doi":"10.33961/jecst.2024.00024","DOIUrl":"https://doi.org/10.33961/jecst.2024.00024","url":null,"abstract":"Transition metal compounds (TMCs) are being researched as promising electrode materials for electrochemical energy storage devices (supercapacitors). Among TMCs, transition metal phosphates (TMPs) have good, layered structures owing to open framework and protonic exchange capability among different layers, good surface area due to engrossed porosity, rich active redox reaction sites owing to octahedral structure and variable valance metallic ions. Hence TMPs become more ideal for supercapacitor electrode materials compared to other TMCs. However, TMPs have got some issues like low conductivity, rate performance, stability, energy, and power densities. But these problems can be addressed by making their composites with carbonaceous materials e.g., carbon nanotubes (CNTs), graphene oxide (GO), graphitic carbon (GC) etc. A few factors like high surface area, excellent electrical conductivity of carbon materials and variable valence metal ions in TMPs caused great enhancement in their electrochemical performance. This article tries to discuss and compare the published data, majorly in last decade, regarding the electrochemical energy storage potential of pristine unary, binary, and ternary TMPs and their hybrid composites with carbonaceous materials (CNTs, GOs/rGOs/, GC etc.). The electrochemical performance of the hybrids has been reported to be higher than the pristine counterparts. It is hoped that the current review will open a new gateway to study and explore the high performance TMPs based supercapacitor materials.","PeriodicalId":506716,"journal":{"name":"Journal of Electrochemical Science and Technology","volume":"25 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140726996","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}