Pub Date : 2022-06-30DOI: 10.31613/ceramist.2022.25.2.04
Seokhyun Lee, Jongsik Kim
It is widely accepted that Sb oxide promotes redox cycling feature and SO2 resistance of a catalyst utilized for selective catalytic NOX reduction (SCR) at low temperatures (≤300 ℃). However, promotive roles of Sb oxide have never been explored with the alteration of its crystal phases, which can be crucial to direct the overall acidic/redox characteristics and SCR performance of a catalyst along with its SO2 tolerance. In this regard, while implementing TiO2-supported Mn oxide (Mn) as a model catalyst, we successfully isolated Sb2O3 and Sb2O5 on Mn using wet impregnation and precipitation protocols, leading to produce Mn-Sb-I and Mn- Sb-P, respectively. The resulting catalysts were verified to have comparable acidic properties, yet, exhibit distinct redox traits, as evidenced by the greatest quantity of labile oxygens for Mn-Sb-I (Sb2O3) compared to Mn and Mn-Sb-P (Sb2O5). This leads to significant enhancement of SCR performance and SO2 resistance for Mn-Sb-I over the others.
Sb氧化物促进了低温(≤300℃)选择性催化NOX还原(SCR)催化剂的氧化还原循环特性和抗SO2性能。然而，Sb氧化物的促进作用从未通过改变其晶相进行过探索，这对于指导催化剂的整体酸性/氧化还原特性和SCR性能以及其SO2耐受性至关重要。在这方面，我们将二氧化钛负载的锰氧化物(Mn)作为模型催化剂，通过湿浸渍和沉淀法成功地在锰上分离出Sb2O3和Sb2O5，分别生产出Mn- sb - i和Mn- Sb-P。结果表明，与Mn和Mn- sb - p (Sb2O5)相比，Mn- sb - i (Sb2O3)的不稳定氧含量最多，这证明了所制备的催化剂具有相似的酸性，但具有明显的氧化还原特性。这使得Mn-Sb-I的SCR性能和抗SO2性能显著提高。
{"title":"Inspecting Promotive Functions of Antimony Oxides for NH3-Assisted Selective Catalytic NOX Reduction","authors":"Seokhyun Lee, Jongsik Kim","doi":"10.31613/ceramist.2022.25.2.04","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.2.04","url":null,"abstract":"It is widely accepted that Sb oxide promotes redox cycling feature and SO<sub>2</sub> resistance of a catalyst utilized for selective catalytic NO<sub>X</sub> reduction (SCR) at low temperatures (≤300 ℃). However, promotive roles of Sb oxide have never been explored with the alteration of its crystal phases, which can be crucial to direct the overall acidic/redox characteristics and SCR performance of a catalyst along with its SO<sub>2</sub> tolerance. In this regard, while implementing TiO2-supported Mn oxide (Mn) as a model catalyst, we successfully isolated Sb<sub>2</sub>O<sub>3</sub> and Sb<sub>2</sub>O<sub>5</sub> on Mn using wet impregnation and precipitation protocols, leading to produce Mn-Sb-I and Mn- Sb-P, respectively. The resulting catalysts were verified to have comparable acidic properties, yet, exhibit distinct redox traits, as evidenced by the greatest quantity of labile oxygens for Mn-Sb-I (Sb<sub>2</sub>O<sub>3</sub>) compared to Mn and Mn-Sb-P (Sb<sub>2</sub>O<sub>5</sub>). This leads to significant enhancement of SCR performance and SO<sub>2</sub> resistance for Mn-Sb-I over the others.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"306 1 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73192605","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}
Pub Date : 2022-06-30DOI: 10.31613/ceramist.2022.25.2.03
M. Kwon, Jongyoon Park, Jongkook Hwang
The rapid increase in demand for high-performance lithium ion batteries (LIBs) has prompted the development of high capacity anode materials that can replace/complement the commercial graphite. Transition metal oxides (TMOs) have attracted great attention as high capacity anode materials because they can store multiple lithium ions (electrons) per unit formula via conversion reaction, resulting in high specific capacity (700-1,200 mAh g-1) and volumetric capacity (4,000-5,500 mAh cm-3). In addition, TMOs are cheap, earth-abundant, non-toxic and environmentally friendly. However, there have been no reports of practical LIBs using conversion-based TMO anodes, because of several major problems such as large voltage hysteresis, low initial Coulombic efficiency (large initial capacity loss), low electrical conductivity, and large volume changes (100~200%). This review summarizes the recent progress, challenges and opportunities for TMO anode materials. The conversion reaction mechanism, problems and solutions of TMO anode materials are discussed. Considering iron oxide as a promising candidate, future research directions and prospects for the practical use of TMO for LIB are presented.
高性能锂离子电池(LIBs)需求的快速增长，推动了可替代/补充商用石墨的高容量负极材料的发展。过渡金属氧化物(TMOs)作为高容量负极材料备受关注，因为它们可以通过转化反应在单位配方中存储多个锂离子(电子)，从而产生高比容量(700-1,200 mAh g-1)和高容量(4,000-5,500 mAh cm-3)。此外，TMOs价格便宜、储量丰富、无毒、环保。然而，由于存在电压迟滞大、初始库仑效率低(初始容量损失大)、电导率低、体积变化大(100~200%)等几个主要问题，目前还没有使用基于转换的TMO阳极的实际lib的报道。本文综述了TMO阳极材料的最新进展、挑战和机遇。讨论了TMO阳极材料的转化反应机理、存在的问题及解决方法。考虑到氧化铁是一个很有前途的候选材料，展望了TMO在LIB中的应用前景和未来的研究方向。
{"title":"Conversion reaction-based transition metal oxides as anode materials for lithium ion batteries: recent progress and future prospects","authors":"M. Kwon, Jongyoon Park, Jongkook Hwang","doi":"10.31613/ceramist.2022.25.2.03","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.2.03","url":null,"abstract":"The rapid increase in demand for high-performance lithium ion batteries (LIBs) has prompted the development of high capacity anode materials that can replace/complement the commercial graphite. Transition metal oxides (TMOs) have attracted great attention as high capacity anode materials because they can store multiple lithium ions (electrons) per unit formula via conversion reaction, resulting in high specific capacity (700-1,200 mAh g-1) and volumetric capacity (4,000-5,500 mAh cm-3). In addition, TMOs are cheap, earth-abundant, non-toxic and environmentally friendly. However, there have been no reports of practical LIBs using conversion-based TMO anodes, because of several major problems such as large voltage hysteresis, low initial Coulombic efficiency (large initial capacity loss), low electrical conductivity, and large volume changes (100~200%). This review summarizes the recent progress, challenges and opportunities for TMO anode materials. The conversion reaction mechanism, problems and solutions of TMO anode materials are discussed. Considering iron oxide as a promising candidate, future research directions and prospects for the practical use of TMO for LIB are presented.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"51 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76050655","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}
Pub Date : 2022-06-30DOI: 10.31613/ceramist.2022.25.2.02
Insoo Ro
Plastic is widely used in almost every sector of the modern economy owing to its low cost, durability, lightweight, and versatility. The mass use of plastic started in the 1950s and has exponentially increased ever since. Today, the world produces more than 350 million tons of plastic every year. However, of the 8.3 billion metric tons that have been produced, only nine percent have been recycled. The pandemic accelerates the use of single-use plastics for packaging and food delivery, which is intensifying our plastic waste problem. In this study, the latest research trends on the chemical recycling of waste plastics using heterogeneous catalysts will be discussed.
{"title":"Catalytic Upcycling of Plastic Waste into High Value-added Chemicals","authors":"Insoo Ro","doi":"10.31613/ceramist.2022.25.2.02","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.2.02","url":null,"abstract":"Plastic is widely used in almost every sector of the modern economy owing to its low cost, durability, lightweight, and versatility. The mass use of plastic started in the 1950s and has exponentially increased ever since. Today, the world produces more than 350 million tons of plastic every year. However, of the 8.3 billion metric tons that have been produced, only nine percent have been recycled. The pandemic accelerates the use of single-use plastics for packaging and food delivery, which is intensifying our plastic waste problem. In this study, the latest research trends on the chemical recycling of waste plastics using heterogeneous catalysts will be discussed.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"50 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87334798","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}
Pub Date : 2022-06-30DOI: 10.31613/ceramist.2022.25.2.08
Dong Hyeon Mok, W. Lee, Jongseung Kim, H. Jung, Ho Yeon Jang, S. Moon, Chaehyeon Lee, S. Back
Towards a sustainable energy future, it is essential to develop new catalysts with improved properties for key catalytic systems such as Haber-Bosch process, water electrolysis and fuel cell. Unfortunately, the current state-of-the-art catalysts still suffer from high cost of noble metals, insufficient catalytic activity and long-term stability. Furthermore, the current strategy to develop new catalysts relies on “trial-and-error” method, which could be time-consuming and inefficient. To tackle this challenge, atomic-level simulations have demonstrated the potential to facilitate catalyst discovery. For the past decades, the simulations have become reasonably accurate so that they can provide useful insights toward the origin of experimentally observed improvements in catalytic properties. In addition, with the exponential increase in computing power, high-throughput catalyst screening has become feasible. More excitingly, recent advances in machine learning have opened the possibility to further accelerate catalyst discovery. Herein, we introduce recent applications and challenges of computation and machine learning for catalyst discovery.
{"title":"Computation and Machine Learning for Catalyst Discovery","authors":"Dong Hyeon Mok, W. Lee, Jongseung Kim, H. Jung, Ho Yeon Jang, S. Moon, Chaehyeon Lee, S. Back","doi":"10.31613/ceramist.2022.25.2.08","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.2.08","url":null,"abstract":"Towards a sustainable energy future, it is essential to develop new catalysts with improved properties for key catalytic systems such as Haber-Bosch process, water electrolysis and fuel cell. Unfortunately, the current state-of-the-art catalysts still suffer from high cost of noble metals, insufficient catalytic activity and long-term stability. Furthermore, the current strategy to develop new catalysts relies on “trial-and-error” method, which could be time-consuming and inefficient. To tackle this challenge, atomic-level simulations have demonstrated the potential to facilitate catalyst discovery. For the past decades, the simulations have become reasonably accurate so that they can provide useful insights toward the origin of experimentally observed improvements in catalytic properties. In addition, with the exponential increase in computing power, high-throughput catalyst screening has become feasible. More excitingly, recent advances in machine learning have opened the possibility to further accelerate catalyst discovery. Herein, we introduce recent applications and challenges of computation and machine learning for catalyst discovery.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"57 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-06-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89110150","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}
Pub Date : 2022-03-31DOI: 10.31613/ceramist.2022.25.1.07
Gwang-Hee Lee, Jin‐Wook Lee
In recent years, perovskite solar cells (PSCs) have been considered as a game changer for next-generation photovoltaic industry. A surge of attention originates from unprecedentedly rapid enhancement in power conversion efficiency (PCE) to reach over 25%, being competitive with commercialized silicon solar cells. The charge transporting layer, in particular, an electron transport layer (ETL) is one of the key components for high-performance PSCs. The ETL affords efficient extraction of the photo-generated electrons from the perovskite layer, which are subsequently transferred to transparent conduct oxide electrode. Tin oxide (SnO2) is one of the most attractive materials for the ETL due to its wide band gap, high optical transmission, high carrier mobility and high chemical stability. Moreover, the facile low temperature deposition process of SnO2 layer is suitable for mass production as well as versatile applications such as flexible devices. Regardless of excellent intrinsic properties, however, quality of the functional layer and resulting device performance is largely affected by the fabrication process of the material. In this study, we review the studies to utilize the SnO2 ETL for PSCs by adopting various fabrication processes, ultimately to improve efficiency and stability of the PSCs.
{"title":"Recent Advances on Tin Oxide Electron Transport Layer for High-Performance Perovskite Solar Cells","authors":"Gwang-Hee Lee, Jin‐Wook Lee","doi":"10.31613/ceramist.2022.25.1.07","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.1.07","url":null,"abstract":"In recent years, perovskite solar cells (PSCs) have been considered as a game changer for next-generation photovoltaic industry. A surge of attention originates from unprecedentedly rapid enhancement in power conversion efficiency (PCE) to reach over 25%, being competitive with commercialized silicon solar cells. The charge transporting layer, in particular, an electron transport layer (ETL) is one of the key components for high-performance PSCs. The ETL affords efficient extraction of the photo-generated electrons from the perovskite layer, which are subsequently transferred to transparent conduct oxide electrode. Tin oxide (SnO2) is one of the most attractive materials for the ETL due to its wide band gap, high optical transmission, high carrier mobility and high chemical stability. Moreover, the facile low temperature deposition process of SnO2 layer is suitable for mass production as well as versatile applications such as flexible devices. Regardless of excellent intrinsic properties, however, quality of the functional layer and resulting device performance is largely affected by the fabrication process of the material. In this study, we review the studies to utilize the SnO2 ETL for PSCs by adopting various fabrication processes, ultimately to improve efficiency and stability of the PSCs.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"44 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74179632","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}
Pub Date : 2022-03-31DOI: 10.31613/ceramist.2022.25.1.02
Seungkyu Kim, Sanghan Lee
Decoration of metal-organic frameworks (MOFs) is emerging as attractive co-catalysts for effective photoelectrochemical (PEC) water oxidation. In this work, we report Bi-based MOF nanoparticle decorated BiVO 4 thin film via a multi-step immersion process for efficient PEC water oxidation. Bi-MOF on the surface improves active sites and promotes surface charge transport under PEC reaction. The PEC performance of our Bi-MOF/BiVO 4 electrode is 2 times higher than that of the bare BiVO4 sample. In addition, the operation stability was significantly improved and its value is retained even after 24 h. These results reveal that Bi-based MOF decoration is an attractive strategy to improve the surface kinetics and stability as a co-catalyst and passivation layer for efficient water oxidation.
{"title":"Bi-Based Metal-Organic Framework Decorated BiVO4 Photoelectrode for Photoelectrochemical Water Splitting","authors":"Seungkyu Kim, Sanghan Lee","doi":"10.31613/ceramist.2022.25.1.02","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.1.02","url":null,"abstract":"Decoration of metal-organic frameworks (MOFs) is emerging as attractive co-catalysts for effective photoelectrochemical (PEC) water oxidation. In this work, we report Bi-based MOF nanoparticle decorated BiVO 4 thin film via a multi-step immersion process for efficient PEC water oxidation. Bi-MOF on the surface improves active sites and promotes surface charge transport under PEC reaction. The PEC performance of our Bi-MOF/BiVO 4 electrode is 2 times higher than that of the bare BiVO4 sample. In addition, the operation stability was significantly improved and its value is retained even after 24 h. These results reveal that Bi-based MOF decoration is an attractive strategy to improve the surface kinetics and stability as a co-catalyst and passivation layer for efficient water oxidation.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"2020 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90662901","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}
Pub Date : 2022-03-31DOI: 10.31613/ceramist.2022.25.1.03
Sangbaek Park
All-solid-state batteries are attractive energy storage devices with high stability and energy density due to their non-flammable solid electrolytes that can utilize lithium and allow cells to be stacked directly in series. It is essential to develop superior solid interfaces for its commercialization by improving the interfacial stability and kinetics. However, complex interfacial phenomena in both solid electrolyte/cathode and solid electrolyte/anode make the interfacial problem of all-solid-state batteries difficult to solve. To overcome this issue, the origins of high resistance and low stability at solid interfaces have been widely explored and alternatives have been proposed accordingly. In this paper, the main methodologies and recent advances for solving the solid electrolyte/electrode interface problems will be reviewed in the chemical, electrochemical, and mechanical aspects.
{"title":"Recent Advances in Interface Engineering for All-Solid-State Batteries","authors":"Sangbaek Park","doi":"10.31613/ceramist.2022.25.1.03","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.1.03","url":null,"abstract":"All-solid-state batteries are attractive energy storage devices with high stability and energy density due to their non-flammable solid electrolytes that can utilize lithium and allow cells to be stacked directly in series. It is essential to develop superior solid interfaces for its commercialization by improving the interfacial stability and kinetics. However, complex interfacial phenomena in both solid electrolyte/cathode and solid electrolyte/anode make the interfacial problem of all-solid-state batteries difficult to solve. To overcome this issue, the origins of high resistance and low stability at solid interfaces have been widely explored and alternatives have been proposed accordingly. In this paper, the main methodologies and recent advances for solving the solid electrolyte/electrode interface problems will be reviewed in the chemical, electrochemical, and mechanical aspects.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"30 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90828501","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}
Pub Date : 2022-03-31DOI: 10.31613/ceramist.2022.25.1.01
Jong Chan Hyun, Y. Choi, Y. S. Yun
Carbon materials have large numbers of redox-active sites for alkali-ion storage, such as Stone-Wales, vacancy, edge, and pseudo-edge defect sites as well as extrinsic defects. The topological defects can be a redox host in anodic voltage regions, while the extrinsic defects can store alkali ions in a cathodic voltage range. Therefore, carbon materials can be a great candidate for both anode and cathode for alkali ion batteries. In this study, alkali ion storage behaviors of different carbon materials, highly defective graphene-based nanosheet (GNS), well-ordered graphite nanoplate (GNP), hard carbon series samples, and nanoporous pyropolymers which are a kind of carbon materials including numerous defects, are reviewed, and their potentials as both anode and cathode for alkali ion batteries are discussed.
{"title":"Carbon/Pyropolymer-based Electrode Materials for Alkali Ion Storage","authors":"Jong Chan Hyun, Y. Choi, Y. S. Yun","doi":"10.31613/ceramist.2022.25.1.01","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.1.01","url":null,"abstract":"Carbon materials have large numbers of redox-active sites for alkali-ion storage, such as Stone-Wales, vacancy, edge, and pseudo-edge defect sites as well as extrinsic defects. The topological defects can be a redox host in anodic voltage regions, while the extrinsic defects can store alkali ions in a cathodic voltage range. Therefore, carbon materials can be a great candidate for both anode and cathode for alkali ion batteries. In this study, alkali ion storage behaviors of different carbon materials, highly defective graphene-based nanosheet (GNS), well-ordered graphite nanoplate (GNP), hard carbon series samples, and nanoporous pyropolymers which are a kind of carbon materials including numerous defects, are reviewed, and their potentials as both anode and cathode for alkali ion batteries are discussed.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"16 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"89767073","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}
Pub Date : 2022-03-31DOI: 10.31613/ceramist.2022.25.1.05
Semin Kang, Jungkyu Kwon, C. Jeong, Sung-In Mo, J. Oh, Sangwoo Ryu
During the fabrication of crystalline silicon solar cells, kerf-loss caused by the wire-sawing of silicon ingots to produce thin wafers inevitably limits the reduction of electricity production cost. To avoid the kerf-loss, direct growth of crystalline silicon wafers of 50-150 μm with a porous separation layer that can be mechanically broken during the exfoliation process, has been widely investigated. However, several issues including flattening of the surface after the exfoliation remain unsolved. In this work an alternative method that utilizes a water-soluble Sr3Al2O6 (SAO) sacrificial layer inserted between the mother substrate and the grown crystalline silicon layers is introduced. Polycrystalline silicon layers were grown on SAO/Si by plasma-enhanced CVD process and silicon membranes could be successfully obtained after the dissolution of SAO in the water. Same process could be applied to obtain flexible amorphous silicon membranes. Further research is being conducted to increase the size of the exfoliated wafer, which expects to reduce the production cost of crystalline silicon solar cells effectively.
{"title":"Polycrystalline Silicon Membranes for Solar Cells Fabricated Using Water-soluble Sacrificial Layers","authors":"Semin Kang, Jungkyu Kwon, C. Jeong, Sung-In Mo, J. Oh, Sangwoo Ryu","doi":"10.31613/ceramist.2022.25.1.05","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.1.05","url":null,"abstract":"During the fabrication of crystalline silicon solar cells, kerf-loss caused by the wire-sawing of silicon ingots to produce thin wafers inevitably limits the reduction of electricity production cost. To avoid the kerf-loss, direct growth of crystalline silicon wafers of 50-150 μm with a porous separation layer that can be mechanically broken during the exfoliation process, has been widely investigated. However, several issues including flattening of the surface after the exfoliation remain unsolved. In this work an alternative method that utilizes a water-soluble Sr3Al2O6 (SAO) sacrificial layer inserted between the mother substrate and the grown crystalline silicon layers is introduced. Polycrystalline silicon layers were grown on SAO/Si by plasma-enhanced CVD process and silicon membranes could be successfully obtained after the dissolution of SAO in the water. Same process could be applied to obtain flexible amorphous silicon membranes. Further research is being conducted to increase the size of the exfoliated wafer, which expects to reduce the production cost of crystalline silicon solar cells effectively.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"53 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90976129","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}
Pub Date : 2022-03-31DOI: 10.31613/ceramist.2022.25.1.06
Minjeong Kim, J. Koo, Minjeong Kang, Juah Song, Chunjoong Kim
Development of lithium-ion rechargeable batteries with high energy storage capability are required in timely manner. Recently, it has been experimentally and computationally proven that oxides with the disordered rock salt structure can be charged and discharged in the Li-ion battery system. In particular, the high entropy disordered rock salt cathode has unique structure property, where both Li-ion and transition metal are randomly located on the cation sites. Such disordering in metal sites can migrate the Li-ion in a percolating way albeit with sluggish kinetics. Therefore, the high entropy disordered rock salt structure has attracted great attention due to its high energy density and stable structure. In this paper, we introduce a simple and effective strategy in the selection of transition metals for high entropy cathodes to achieve desired electrochemical properties.
{"title":"Research Trend in Rock Salt Structured High Entropy Cathode","authors":"Minjeong Kim, J. Koo, Minjeong Kang, Juah Song, Chunjoong Kim","doi":"10.31613/ceramist.2022.25.1.06","DOIUrl":"https://doi.org/10.31613/ceramist.2022.25.1.06","url":null,"abstract":"Development of lithium-ion rechargeable batteries with high energy storage capability are required in timely manner. Recently, it has been experimentally and computationally proven that oxides with the disordered rock salt structure can be charged and discharged in the Li-ion battery system. In particular, the high entropy disordered rock salt cathode has unique structure property, where both Li-ion and transition metal are randomly located on the cation sites. Such disordering in metal sites can migrate the Li-ion in a percolating way albeit with sluggish kinetics. Therefore, the high entropy disordered rock salt structure has attracted great attention due to its high energy density and stable structure. In this paper, we introduce a simple and effective strategy in the selection of transition metals for high entropy cathodes to achieve desired electrochemical properties.","PeriodicalId":9738,"journal":{"name":"Ceramist","volume":"2 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83635863","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}
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