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Weakly coordinating cationic polymer electrolytes for fast-charging solid-state lithium-metal batteries

Journal of energy Chemistry 2025年第6期105卷 243-251页

作者： Soohyoung Lee Kyeong-Seok Oh Ji Eun Lee Sun-Phil Han Hong-I Kim Sang Kyu Kwak Sang-Young Lee Department of Battery Conflation Engineering Yonsei University Department of Chemical and Biomolecular Engineering Yonsei University School of Energy and Chemical Engineering Ulsan National Institute of Science and Technology (UNIST) UNIST Central Research Facilities Ulsan National Institute of Science and Technology (UNIST) Department of Chemical and Biological Engineering Korea University

Despite the growing interest in fast-cha rging solid-state lithium（Li）-metal batteries（SSLMBs）,their practical implementation has yet to be achieved,primarily due to an incomplete understanding of the disparate and often conflicting requirements of the bulk electrolyte and the electrode-electrolyte ***,we present a weakly coordinating cationic polymer electrolyte（WCPE） specifically designed to regulate the Li+coordination structure,thereby enabling fast-charging *** WCPE comprises an imidazolium-based polycationic matrix combined with a succinonitrile（SN）-based highconcentration *** conventional neutral polymer matrices,the polycationic matrix in the WCPE competes with Li+for interactions with SN,weakening the original coordination between SN and Li+.This modulation of SN-Li+interaction improves both Li+conductivity of the WCPE(σLi+=1.29mS cm-1) and redox kinetics at the electrode-electrolyte ***,SSLMB cells（comprising LiFePO4cathodes and Li-metal anodes） with the WCPE achieve fast-charging capability（reaching over80% state of charge within 10 min）,outperforming those of previously reported polymer electrolytebased SSLMBs.

关键词： Cationic polymer electrolytes Electrode-electrolyte interphase Fast-charging Solid-state lithium-metal batteries Weak coordination

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Carbon-based materials for potassium-ion battery anodes: Storage mechanisms and engineering strategies

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Journal of energy Chemistry 2025年第6期105卷 764-796页

作者： Hyun Chul Kim Hongjung Kim Sung Oh Moon Changshin Jo Ho Seok Park School of Chemical Engineering Sungkyunkwan University (SKKU) Department of Chemical Engineering Pohang University of Science and Technology (POSTECH) Department of Battery Engineering Pohang University of Science and Technology (POSTECH) SKKU Institute of Energy Science and Technology (SIEST) Sungkyunkwan University

Recently,potassium-ion batteries(PIBs) have received significant attention in the energy storage field owing to their high-power output,fast charging capability,natural abundance,and environmental ***,we comprehensively review recent advancements in the design and development of carbon-based anode materials for PIBs anodes,covering graphite,hard carbon,alloy and conversion materials with carbon,and carbon host for K metal *** strategies such as structural engineering,heteroatom-doping,and surface modifications are highlighted to improve electrochemical performances as well as to resolve technical challenges,such as electrode instability,low initial Coulombic efficiency,and electrolyte ***,we discuss the fundamental understanding of potassium-ion storage mechanisms of carbon-based materials and their correlation with electrochemical ***,we present the current challenges and future research directions for the practical implementation of carbon-based anodes to enhance their potential as next-generation energy storage materials for *** review aims to provide our own insights into innovative design strategies for advanced PIB's anode through the chemical and engineering strategies.

关键词： Anode materials Carbon host Carbon materials energy storage Graphite Hard carbon Potassium Potassium-ion batteries

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Stable, efficient inverted perovskite solar cells enabled by the multifunctional ytterbium oxide buffer

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Science China Chemistry 2024年第8期67卷 2423-2424页

作者： Manman Hu Sang Il Seok Department of Energy and Chemical Engineering Ulsan National Institute of Science and TechnologyUlsan 44919Republic of Korea

Significant advancements in single-junction inverted perovskite solar cells (PSCs) have led to power conversion efficiencies (PCEs) exceeding 25% [1]. However, their operational stability under strict conditions falls short compared with commercial solar panels, primarily due to the ion migration. This migration alters the chemical composition within the perovskite layer, increasing the heterogeneity and forming degradation sites [2]. Additionally, ion accumulation at metal interfaces corrodes electrodes, while metal diffusion into perovskite layers further compromises the stability, highlighting critical areas for the improvement in long-term device performance [3,4].

关键词： perovskite exceeding stability

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Scalable carbon-patterned layer enhances low-temperature performance of large-format lithium-ion batteries

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Journal of energy Chemistry 2025年第6期105卷 87-95页

作者： Jaejin Lim Siyoung Park Hyobin Lee Seungyeop Choi Gwonsik Nam Kyung-Geun Kim Jaecheol Choi Young-Gi Lee Yong Min Lee Department of Chemical and Biomolecular Engineering Yonsei University Department of Energy Science and Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Department of Battery Engineering Yonsei University Energy Science and Engineering Research Center Daegu Gyeongbuk Institute of Science and Technology (DGIST) Smart Materials Research Section Electronics and Telecommunications Research Institute (ETRI) 218 Gajeongno

With electric vehicles(EVs) emerging as a primary mode of transportation,ensuring their reliable operation in harsh environments is ***,lithium-ion batteries(LIBs) suffer from severe polarization at low temperatures,limiting their operation in cold *** addition,difficulties in discovering new battery materials have highlighted a growing demand for innovative electrode designs that achieve high performance,even at low temperatu *** address this issue,we prepared a thin,resistive,and patterned carbon interlayer on the anode current *** carbon-patterned layer(CPL) serves as a self-heating layer to efficiently elevate the entire cell temperature,thus improving the rate capability and cyclability at low temperatures while maintaining the performance at room ***,we validated the versatile applicability of CPLs to large-format LIB cells through experimental studies and electrochemo-thermal multiphysics modeling and simulations,with the results confirming 11% capacity enhancement in 21,700 cylindrical cells at a 0.5C-rate and-24℃.We expect this electrode design to offer reliable power delivery in harsh climates,thereby potentially expanding the applications of LIBs.

关键词： Carbon-pattern layer Electrode design Lithium-ion batteries Low temperature Self-heating

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Insight into the effect of thick graphite electrodes towards high-performance cylindrical Ni-rich NCA90 Li-ion batteries

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Journal of energy Chemistry 2023年第12期87卷 322-333,I0009页

作者： Nattanon Joraleechanchai Thitiphum Sangsanit Kan Homlamai Purin Krapong Montree Sawangphruk Centre of Excellence for Energy Storage Technology(CEST) Department of Chemical and Biomolecular EngineeringSchool of Energy Science and EngineeringVidyasirimedhi Institute of Science and TechnologyRayong 21210Thailand

This study explored the complex effect of graphite tortuosity on the electrochemical performance of Ni-rich NCA90 Li-ion batteries(LIBs).Different levels of graphite anode tortuosity were analyzed,revealing that low-tortuosity electrodes had better graphite *** in-plane tortuosities of the graphite anode electrodes examined were 1.70,1.94,2.05,and 2.18,while their corresponding through-plane tortuosities were 4.74,6.94,8.19,and ***-operando X-ray diffraction and differential electrochemical mass spectrometry were employed to investigate the charge storage mechanism and gas *** study revealed that while graphite electrode tortuosity impacted the amount of Li present in the lithiated graphite phase due to diffusion constraints,it did not affect gas *** Li-ion utilization in low-tortuosity electrodes was higher than that in high-tortuosity electrodes because of solid-diffusion ***,the galvanostatic intermittent titration technique(GITT) was employed to investigate a lithium-ion diffusion *** results indicate that the lithium-ion diffusion coefficient exhibits a significant difference only during LiC_(6) phase *** also observed that the use of a lower tortuosity electrode leads to improved lithium-ion ***,graphite utilization is influenced by the porous electrode *** tests adhering to UN38.3 guidelines verified battery *** study demonstrated the practical application of optimized NCA90 LIB cells with diverse graphite electrode tortuosities in a high-performance Lamborghini GoKart,paving the way for further advancements in Ni-rich LIB technology.

关键词： Li-ion batteries Tortuosity Ni-rich NCA90 cathode On-line gas detection In-operando XRD

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Surface modification of Himalayan nettle fibre with chemical treatments for potential reinforcement in polymer composites

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Biomass Conversion and Biorefinery 2025年 1-21页

作者： Mudoi, Manash Protim Sinha, Shishir Department of Chemical Engineering Indian Institute of Technology Uttarakhand Roorkee247667 India Department of Chemical Engineering University of Petroleum and Energy Studies Uttarakhand Dehradun248007 India

Among different natural fibres, Himalayan nettle is gaining importance as reinforcement, an alternative to synthetic fibre, for polymer composite synthesis due to its wide availability, low price, and sustainable production. In this study, untreated (raw) and chemically treated nettle fibres were characterized by standard testing methods to find the best chemical type and concentration for surface modification, as there is not a single chemical treatment equally effective for all kinds of natural fibre. Alkali (3 and 5%), silane (1 and 3%), and hydrogen peroxide (3 and 5%) solutions were used for chemical treatment. The fibres were characterized by compositional analysis, XRD, FTIR, SEM, AFM, single fibre mechanical strength, and physical properties like diameter and fibre density. Among all chemical treatments, 3% alkali–treated fibre showed the maximum tensile strength (571.06 MPa), high cellulose content (83.8 wt%), high crystallinity index (82.55%), lower crystallite size (11.25 nm), highest roughness parameters (788 nm Rmax), lower fibre width, lowest microfibril angle, and higher elongation at break. The tensile strength of 571.06 MPa observed for 3% alkali–treated fibre was significantly high and suitable for reinforcement with polymer matrices. The 3% alkali–treated fibre exhibited the lowest weight loss (61.0%) in 2nd stage thermal degradation and the maximum residual weight (24.31%) at 800°C, indicating improved thermal stability than the other studied fibre samples. Thus, this study justifies the suitability of the 3% alkali treatment for surface modification of the nettle fibre to be utilized in polymer composite synthesis. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2025.

关键词： chemical modification

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Hybrid improper ferroelectricity in a Sicompatible CeO_(2)/HfO_(2) artificial superlattice

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npj Computational Materials 2024年第1期10卷 111-118页

作者： Pawan Kumar Jun Hee Lee Department of Energy Engineering School of Energy and Chemical EngineeringUlsan National Institute of Science and Technology(UNIST)Ulsan44919Republic of Korea Graduate School of Semiconductor Materials and Devices Engineering Ulsan National Institute of Science and Technology(UNIST)Ulsan44919Republic of Korea

Hybrid improper ferroelectrics(HIFS),characterized by ferroelectric polarization arising from the rotation of two symmetry inequivalent antiferrodistortive modes,exhibit exotic properties such as T-independent dielect... 详细信息

关键词： polarization ferroelectric Hybrid

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Computational study of the performance of a solar dryer for improvement in the shelf life of the food materials

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Environmental Science and Pollution Research 2024年第23期31卷 34550-34557页

作者： Sengar, Mukul Singh, Dhananjay Mishra, Pradeep Kumar Singh, Deepak Giri, Balendu Shekher Department of Chemical Engineering Institute of Engineering & ampTechnology UP Lucknow India Department of Chemical Engineering Indian Institute of Technology BHU UP Varanasi India Department of Sustainability University of Petroleum and Energy Studies UK Dehradun India

In this study, the thermal and drying characteristics of a thin layer food sample were investigated. An indirect type, simple, efficient, and economically feasible solar dryer was fabricated and used for food preservation. However, a dynamic model of a fabricated solar dryer was also presented to gain a better insight into the drying and thermal actions. This model consists of thermal modeling of the drying chamber, solar collector, and solar-dried food sample. The law of conservation of energy was applied to evaluate the temperature at different sections of the solar dryer with respect to drying time. All listed model equations were solved in the MATLAB environment. This study helps to examine the influence of solar radiation on the collector plate temperature, drying chamber temperature, food sample temperature, and performance parameters such as thermal efficiency with respect to drying time. Model data was found in good agreement with experimental data within a 4% error. It is concluded that the drying of food material is affected by air temperature, the collector temperature, mode of heat transfer, and material characteristics such as dimension and mass of the food sample. © The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature 2024.

关键词： Solar energy

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A review on WO_(3)-based composite photocatalysts:synthesis,catalytic mechanism and diversified applications

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Rare Metals 2024年第8期43卷 3441-3459页

作者： Xue Zhang Zi-Qi Zhang Yan-Dong Sun Xiao-Jia Ma Feng-Xian Jin Fang-Yuan Zhang Wei-Guang Han Bo-Xiong Shen Sheng-Qi Guo College of Energy and Environmental Engineering Hebei University of TechnologyTianjin 300401China Department of Food and Chemical Engineering Liuzhou Institute of TechnologyLiuzhou 545616China

Photocatalysis as an emerging "green" energy conversion technology has attracted domestic and international *** technology uses semiconductor photocatalysts to convert solar energy into directly usable chemical energy,showing great potential for application in environmental pollutant purification and clean energy production,with broad development *** many semiconductor materials,tungsten trioxide(WO_(3)) is favored by researchers in the field of photocatalysis because of its good visible light response and excellent valence band hole oxidation ***,a large number of photocatalysts based on WO_(3),in particular W03-based composite photocatalysts,have been reported,and their applications cover a wide range of *** order to promote the development of WO_(3)-based photocatalysts and provide a reference for colleagues,we present a systematic summary of the applications and research progress of W03-based composites in the field of photocatalysis in recent *** from the structural properties of WO_(3)itself,this article summarizes the preparation methods and structure-activity relationships of WO_(3)-based composite ***,it introduces the current application status of existing WO_(3)-based composite photocatalysts in CO_(2) reduction,hydrogen production,nitrogen fixation,and pollutant ***,the development prospects were analyzed.

关键词： WO_(3)-based composite photocatalysts Intrinsic characteristic Preparation method Reaction mechanism Applications

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Enhancing electrochemo-mechanical properties of graphite-silicon anode in all-solid-state batteries via solvent-induced polar interactions in nitrile binders

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Journal of energy Chemistry 2025年第6期105卷 514-524页

作者： Jaecheol Choi Cheol Bak Ju Young Kim Dong Ok Shin Seok Hun Kang Yong Min Lee Young-Gi Lee Smart Materials Research Section Electronics and Telecommunications Research Institute (ETRI) Department of Semiconductor and Advanced Device Engineering University of Science and Technology (UST) Department of Energy Science & Engineering Daegu Gyeongbuk Institute of Science and Technology (DGIST) Department of Battery Engineering Yonsei University Department of Chemical and Biomolecular Engineering Yonsei University

All-solid-state batteries（ASSBs） with sulfide-type solid electrolytes（SEs） are gaining significant attention due to their potential for the enhanced safety and energy *** the slurry-coating process for ASSBs,nitrile rubber（NBR） is primarily used as a binder due to its moderate solubility in non-polar solvents,which exhibites minimal chemical reactivity with sulfide ***,the NBR binder,composed of butadiene and acrylonitrile units with differing polarities,exhibits different chemical compatibility depending on the subtle differences in polarity of ***,we systematically demonstrate how the chemical compatibility of solvents with the NBR binder influences the performance of *** is found to activate the acrylonitrile units,inducing an elongated polymer chain configuration in the binder solution,which gives an opportunity to strongly interact with the solid components of the electrode and the current ***,selecting anisole as a solvent for the NBR binder enables the fabrication of a mechanically robust graphite-silicon anode,allowing ASSBs to operate at a lower stacking pressure of 16 *** approach achieves an initial capacity of 480 mAh g-1,significantly higher than the 390 mAh g-1achieved with the NBR/toluene binder that has less chemical ***,internal stress variations during battery operation are monitored,revealing that the enhanced mechanical properties,achieved through acrylonitrile activation,effectively mitigate internal stress in the graphite/silicon composite anode.

关键词： Solid-state batteries Nitrile rubber Solvents Silicon Sulfide solid electrolytes

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