Article
Engineering, Multidisciplinary
Thomas Heil, Andreas Jossen
Summary: The study approximates the dynamics of the ZARC element and its parameter influence using fundamental equivalent circuits, introducing two different approaches using RC circuits. Both methods depend on three parameters and demonstrate a decrease in total capacitance with growing deviations from the behavior of an RC circuit.
MEASUREMENT SCIENCE AND TECHNOLOGY
(2021)
Article
Chemistry, Physical
Vikas Yadav, Anjan Das, C. Krishnamurthy, Manu Jaiswal
Summary: Graphene oxide (GO) membranes with hierarchical microstructure have been studied under controlled humidity levels. Water content in the interlayer spaces and the voids between crystalline lamellae in GO membranes was quantified using dynamic vapor sorption and AC impedance response methods. The study reveals that water is primarily absorbed in the interlayer spaces at low humidity, while the fraction of water in the void spaces increases with humidity. The dielectric constant of confined water is estimated to be greater than 17, and the conductivity increases significantly within a narrow range of water content. The findings suggest a percolative process for protons and distinct behavior of confined water in hydrophilic and hydrophobic environments.
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
(2022)
Article
Electrochemistry
Anis Allagui, Ahmed S. Elwakil
Summary: The capacitance of capacitive energy storage devices cannot be directly measured, but can be estimated from the input and output signals expressed in the time or frequency domains. In this study, Tikhonov's regularization method is used to solve this problem by adding damping to each SVD component, effectively filtering out components corresponding to small singular values and obtaining a stable solution.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Johannes Hunger, Jan Schaefer, Patrick Ober, Takakazu Seki, Yongkang Wang, Leon Praedel, Yuki Nagata, Mischa Bonn, Douwe Jan Bonthuis, Ellen H. G. Backus
Summary: Understanding the collective behavior of ions at charged surfaces is crucial for geological and electrochemical processes. In this study, sum-frequency generation (SFG) spectroscopy was used to investigate the symmetry-breaking of water molecules at a charged silica surface in contact with different alkaline metal chloride solutions. The results demonstrate that the water response varies with the cation, with LiCl showing a significantly enhanced SFG response compared to CsCl. Further analysis indicates that the effect of different salts on the optical response is indirectly mediated by the reorganization of interfacial water.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Nanoscience & Nanotechnology
Zhongzheng Huang, Junku Liu, Tianfu Zhang, Yuanhao Jin, Jiaping Wang, Shoushan Fan, Qunqing Li
Summary: The study showed that graphene/HfO2/Si photodetector has a stronger interfacial gating effect compared to graphene/SiO2/Si. The high efficiency was attributed to the higher interface state density at the HfO2/Si interface and the higher dielectric constant of the HfO2 layer. By utilizing the interfacial gating mechanism, fast response, high photoresponsivity, and ultrabroadband photodetection were achieved simultaneously, offering potential for electronic and optoelectronic applications.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Rui Li, Daochuan Jiang, Peng Du, Chenbo Yuan, Xiaoyu Cui, Qichen Tang, Jian Zheng, Yecheng Li, Ke Lu, Xiaodi Ren, Shan Gao, Xiaowen Zhan
Summary: Solid electrolytes hold promise for high-energy metallic sodium anodes, but the poor contact between sodium and the solid electrolyte limits the performance of solid-state sodium-metal batteries (SSSMBs). In this study, a Pb/C interlayer strategy is introduced to improve the wetting behavior of Na3Zr2Si2PO12 (NZSP) solid electrolyte. The modified NZSP exhibits excellent wetting properties at low temperature and a negligible interfacial resistance, leading to a longer cycle life. In addition, the study explores the effect of the negative/positive capacity ratio on the performance of SSSMBs and demonstrates the dual functions of the Pb/C interlayer in stabilizing the anode interface and improving sodium utilization.
Article
Chemistry, Physical
Yifeng Zhang, Hui Huang, Xiaowei Ning, Chengwei Li, Zeng Fan, Lujun Pan
Summary: Graphene is a promising electrode material for electrical double-layer capacitors, but the dominant hydrogen evolution reaction (HER) in the negative voltage window limits the energy density. Introducing a co-solvent electrolyte of dimethyl sulfoxide (DMSO) in water has been shown to suppress HER, but the role of DMSO in expanding the negative voltage window needs further explanation. Using molecular dynamics simulations, we found that DMSO replaces part of water molecules on the electrode surface, leading to a passivation layer that reduces HER activity. The amount of Na center dot H2O, which exhibits high HER activity, is related to the operating negative voltage window. Our work provides new insights into the mechanism of co-solvent electrolyte in expanding the negative voltage window.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Yifeng Zhang, Hui Huang, Xiaowei Ning, Chengwei Li, Zeng Fan, Lujun Pan
Summary: Understanding the interaction between electrode and electrolyte interface is essential for electrochemical energy storage devices. This study focuses on the graphene/aqueous electrolyte interface and reveals the relationship between the response of interfacial water molecules and the operating voltage window. It is found that nitrogen dopants can effectively broaden the negative voltage window, providing new insights and strategies for improving the electrochemical performance of electrochemical double-layer capacitors.
Review
Materials Science, Multidisciplinary
Si-yu Zhang, Yue-ran Li, Tao Xing, Hai-yan Liu, Zhao-bin Liu, Zhong-tao Li, Ming-bo Wu
Summary: This paper reviews the recent progress in using polyanions as solid electrolytes for all-solid-state lithium batteries. It elaborates on the ion transport mechanisms within polyanionic crystals and in the electrode/electrolyte interlayer. The principles and methods to improve lithium-ion transport in polyanionic electrolytes are summarized, along with various surface modification methods to enhance the stability and processability of the electrode/electrolyte interfaces. Furthermore, the paper outlines the necessary developments in processing and equipment for the fabrication of all-solid-state batteries, and discusses the trends towards the practical use of polyanions in these batteries.
NEW CARBON MATERIALS
(2022)
Review
Chemistry, Multidisciplinary
Syed Atif Pervez, Milad Madinehei, Nima Moghimian
Summary: This article discusses the role of graphene-based materials in improving the electrochemical performance of solid-state batteries, highlighting how they can address the challenges faced by solid-state batteries by improving Li+ ion kinetics and enhancing stability.
Article
Energy & Fuels
Adrian Calborean, Olivia Bruj, Cristian Morari
Summary: This study explores the fabrication of two different metallic grid structures to improve the economic and electrical performance of lead-acid batteries in the automotive industry. The characterization of these structures was carried out using Electrochemical Impedance Spectroscopy. The results showed that the leaf-shaped battery had better performance than the hexagonal model. The analysis of degradation slope and degradation speed indicated that the rectangular model had better current uniformity.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Energy & Fuels
Hualan Wang, Risheng Liu, Xue Liu, Langyuan Wu, Yan Li, Xiaogang Zhang
Summary: The study demonstrates that the SiO2 embedded graphene hybrid is an effective strategy to enhance the overall electrochemical properties of supercapacitors, allowing for better utilization of the electric double layer capacitance of graphene and pseudocapacitance of polyaniline.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Multidisciplinary
Guanjie Lu, Menghong Li, Peng Chen, Weikang Zheng, Zuguang Yang, Ronghua Wang, Chaohe Xu
Summary: A composite lithium anode (CLA) was designed and prepared to solve the obstacles of huge interfacial resistance and growth of detrimental Li dendrites in solid-state lithium metal batteries (SSLMBs). The CLA significantly improved the intrinsic ionic diffusion capability of the lithium anode and simultaneously enhanced the wettability of the anode towards solid-state electrolyte, resulting in a robust and high ionic conductive solid-state interface. The SSLMB with the CLA achieved excellent cycling performance and high-rate capability, demonstrating its potential for high-performance solid-state Li metal batteries.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Review
Chemistry, Multidisciplinary
Jinmeng Sun, Yuhang Liu, Lei Liu, Jingxuan Bi, Siying Wang, Zhuzhu Du, Hongfang Du, Ke Wang, Wei Ai, Wei Huang
Summary: Lithium-sulfur batteries are promising candidates for next-generation energy storage with superior energy density. The sluggish deposition of Li2S, which contributes to 75% of the overall capacity, remains a formidable challenge. Efforts have been made to optimize the interface for efficient Li2S deposition, but a comprehensive overview and understanding are still lacking.
ADVANCED MATERIALS
(2023)
Article
Engineering, Biomedical
Binying Yang, Jia Xu, Shao Hu, Boning You, Qing Ma
Summary: This study used Electrical Impedance Spectroscopy to investigate the effect of lead exposure on mouse blood, revealing changes in electrical properties of blood cells compared to healthy blood. These changes included decreased cell count, amplitude and phase characteristics of electrical impedance, increased characteristic frequencies, and altered impedance of plasma, erythrocyte membrane, and hemoglobin.
BIOMEDICAL ENGINEERING ONLINE
(2021)
Article
Nanoscience & Nanotechnology
Alessandro Grillo, Antonio Di Bartolomeo, Francesca Urban, Maurizio Passacantando, Jose M. Caridad, Jianbo Sun, Luca Camilli
ACS APPLIED MATERIALS & INTERFACES
(2020)
Article
Chemistry, Multidisciplinary
Jianbo Sun, Giacomo Giorgi, Maurizia Palummo, Peter Sutter, Maurizio Passacantando, Luca Camille
Article
Physics, Applied
Jianbo Sun, Maurizio Passacantando, Maurizia Palummo, Michele Nardone, Kristen Kaasbjerg, Alessandro Grillo, Antonio Di Bartolomeo, Jose M. Caridad, Luca Camilli
PHYSICAL REVIEW APPLIED
(2020)
Article
Chemistry, Physical
Sara Postorino, Jianbo Sun, Saskia Fiedler, Laurent O. Lee Cheong Lem, Maurizia Palummo, Luca Camilli
Article
Physics, Applied
Jianbo Sun, Luca Camilli, Jose M. Caridad, Jaime E. Santos, Yuxin Liu
APPLIED PHYSICS LETTERS
(2020)
Article
Physics, Applied
Antonio Di Bartolomeo, Alessandro Grillo, Filippo Giubileo, Luca Camilli, Jianbo Sun, Daniele Capista, Maurizio Passacantando
Summary: GeAs nanoflakes show potential as cold cathodes for electron emission, with field emission occurring at an approximate turn-on field of 80 V µm(-1)Acm(-2). Light exposure or electron beam can decrease their p-type conduction ability.
JOURNAL OF PHYSICS D-APPLIED PHYSICS
(2021)