Article
Chemistry, Physical
Suguru Kato, Shoji Takada, Sotaro Fuchigami
Summary: In this study, a particle smoother (PS) method was developed to integrate molecular dynamics simulations with asynchronous HS-AFM movie data, which reproduced the dynamic behavior of a target molecule better than the previous particle filter method.
JOURNAL OF CHEMICAL THEORY AND COMPUTATION
(2023)
Article
Nanoscience & Nanotechnology
Yumi H. Ikuhara, Xiang Gao, Kazuaki Kawahara, Craig A. J. Fisher, Akihide Kuwabara, Ryo Ishikawa, Hiroki Moriwake, Yuichi Ikuhara
Summary: In this report, changes in epitaxial LiMn2O4 thin films during the initial charge-discharge cycles were analyzed to gain insights into its electrochemical behavior. The study found that defect-rich LiMn2O4 surfaces significantly contribute to the increased resistivity of the battery, while sequences of stacking faults impede Li-ion migration, resulting in capacity fading. These findings highlight the importance of minimizing defect formation in spinel cathodes to improve cycle performance.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Chemistry, Physical
Sergey Yu. Luchkin, Maria A. Kirsanova, Dmitry A. Aksyonov, Svetlana A. Lipovskikh, Victoria A. Nikitina, Artem M. Abakumov, Keith J. Stevenson
Summary: Li-rich layered metal oxides have been extensively studied as potential positive electrode materials for Li-ion batteries. This research investigates the cycling-driven electrochemical activation process in Li-rich materials, which leads to an increase in reversible capacity. The activation process involves oxidation and reduction reactions, with the rate being influenced by the cycling rate.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Analytical
Andreas Karg, Sebastian Goedrich, Philipp Dennstedt, Nicolas Helfricht, Markus Retsch, Georg Papastavrou
Summary: Scanning electrochemical microscopy (SECM) is a versatile technique for monitoring electrochemical reactions on a highly resolved local scale. This research presents a novel approach to implement a three-electrode setup for SECM in any fluid cell, allowing for high-resolution imaging and equivalent electrochemical performance to macroscopic electrodes.
Article
Chemistry, Analytical
Luke Oduor Otieno, Bernard Ouma Alunda, Jaehyun Kim, Yong Joong Lee
Summary: Improving the imaging rate of a high-speed atomic force microscope requires specialized hardware and software, with ongoing efforts to enhance general applications. A compact HS-AFM scan-head design with minimal Z-scanner loading is presented in this study as an efficient solution for faster imaging.
Article
Electrochemistry
Adrien Mocaer, Francoise Pillier, Alain Pailleret
Summary: Thickness variations of PEDOT thin films under potential conditioning were studied using electrochemical atomic force microscopy. The research showed that PEDOT films can switch from anion exchange behavior to cation exchange behavior through electrochemical aging, suggesting that ion exchange behaviors of PEDOT can be modulated by potential cycling.
ELECTROCHIMICA ACTA
(2021)
Article
Polymer Science
Xiaobin Liang, Makiko Ito, Ken Nakajima
Summary: In this study, atomic force microscopy nanomechanics were used to visualize the nanoscale stress distribution in carbon black-reinforced isoprene rubber vulcanizates at different elongations, revealing the stress concentrations in the protofibrous structure formed around the CB filler. The relationship between local nanoscale stress distribution and macroscopic tensile properties was established based on microscopic stress distribution and spatial structure, providing insights into the microscopic reinforcement mechanism of carbon black-containing rubber composites.
Article
Electrochemistry
Jialong Wang, Md Monirul Islam, Scott W. Donne
Summary: This study describes a modified Swagelok electrochemical cell to characterize individual electrode behavior in the non-aqueous Li-LiMn2O4 system. The outcomes include variations in lithium negative electrode potential with applied current, lithium corrosion and passivation in the electrolyte, and LiMn2O4 dissolution with cycling, revealing Mn(III) as the dissolution product. The application of this technique to other systems, such as electrode materials and electrolytes, is also discussed.
ELECTROCHIMICA ACTA
(2021)
Article
Nanoscience & Nanotechnology
Xiaobin Liang, Takashi Kojima, Makiko Ito, Naoya Amino, Haonan Liu, Masataka Koishi, Ken Nakajima
Summary: In situ atomic force microscopy (AFM) nanomechanical technique was used to directly visualize the micromechanical behaviors of polymer nanocomposites during compressive strain. The stress distribution image of carbon black (CB)-filled rubber at the nanoscale was obtained for the first time, revealing the microscopic reinforcement mechanisms and heterogeneous deformation behaviors. The stress concentrations near the CB particles formed a network structure which acted as the key reinforcement mechanism. The finite-element method (FEM) simulations reproduced the heterogeneity in stress distribution, confirming the insights provided by the AFM experiments.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Review
Chemistry, Physical
Chunlei Yang, Tianhui Su, Yanbo Hua, Liming Zhang
Summary: This review summarizes the latest results of electrochemical scanning probe microscopy techniques in studying the interfacial properties of electrocatalysts and photoelectrodes, and offers some perspectives on future research directions.
Article
Electrochemistry
Chen Cai, Gary M. Koenig
Summary: To increase the energy and power density of batteries, engineering the electrode structure can provide improvements. Sintered electrodes can achieve high areal loadings, but may face electronic and/or ionic transport limitations as loadings and thicknesses increase.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Yanxue Guan, Juan Qin, Xinyue Guo, Zongjia Li, Haoran Guo, Miaomiao Zhang, Bailin Zhang, Jilin Tang
Summary: This study investigated the morphological evolution and nanomechanical property changes of Ni-Al LDH nanosheets during potential cycling using in situ electrochemical atomic force microscopy. The results showed that the Ni/Al molar ratio affected the dissolution rate and hardness of Ni-Al LDH nanosheets, with slower dissolution rate being beneficial for improving the electrochemical performance.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Umit Celik, Kuebra Celik, Ihsan Kehribar, Suleyman Celik, Mehmet Z. Baykara
Summary: Forming a fundamental understanding of tribological processes on the atomic scale has the potential to revolutionize the control of friction and wear in macroscopic mechanical systems. However, current methods for studying tribology at the nanoscale, such as atomic force microscopy, are limited in scanning speed compared to macroscopic mechanical processes. In this study, a new method combining atomic force microscopy with quartz crystal microbalance measurements is proposed for high-speed nanoscale tribology.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Changhyo Sun, Sang-Jin Ko, Soonho Jung, Chenxi Wang, Donghwa Lee, Jung-Gu Kim, Yunseok Kim
Summary: This study developed a method for differentiating local microstructures on low carbon steel based on multiple physical properties at the nanoscale combined with machine learning techniques. The analysis of corrosion behavior according to the identified local microstructures and obtained physical properties potentially provides a powerful tool for identifying and visualizing features of data. This approach could be expanded to electrochemical systems with more complex microstructures.
APPLIED SURFACE SCIENCE
(2021)
Correction
Automation & Control Systems
Linlin Li, Jie Huang, Sumeet S. Aphale, LiMin Zhu
Summary: The affiliations of authors Linlin Li, Jie Huang, and Sumeet S. Aphale have been corrected in the above-mentioned article.
IEEE-ASME TRANSACTIONS ON MECHATRONICS
(2021)
Article
Microscopy
Z. Bi, W. Cai, Y. Wang, G. Shang
JOURNAL OF MICROSCOPY
(2018)
Article
Chemistry, Multidisciplinary
Zhuanfang Bi, Jiaxiong Wu, Shan Yang, Liu Li, Peifa Yang, Yang Shang, Guangyi Shang
Article
Optics
Lin Sun, Benfeng Bai, Xiaoxia Meng, Tong Cui, Guangyi Shang, Jia Wang
Article
Chemistry, Multidisciplinary
Peifa Yang, Zhuanfang Bi, Yang Shang, Ke Chen, Yaowen Liang, Xiao Li, Guangyi Shang
Summary: The evolution of the mechanical properties of LiMn2O4 during charge/discharge cycles is examined at the nanoscale using bimodal atomic force microscopy. The study reveals that the topographic change and elastic modulus degradation of the LiMn2O4 films occur simultaneously and irreversibly, with a dramatic decrease in elastic modulus observed within the first 10 cycles. The reasons for elastic modulus degradation are discussed in relation to nanoscale phenomena and macroscopic measurement results.
Article
Chemistry, Multidisciplinary
Xiaoxia Meng, Zhuanfang Bi, Pengtao Lou, Guangyi Shang
Summary: This study investigates the relationship between surface structure evolution and capacity fading of LiMn2O4 electrode material using an improved operando Raman system. By measuring a series of real-time Raman spectra, the inherent correlation between electrode potential/Li content and surface structure changes is revealed. The causes of capacity fading are discussed using experimental data and theoretical calculations.
Article
Nanoscience & Nanotechnology
Ya Lu, Zhuanfang Bi, Guangyi Shang
Summary: Detection of trace carbendazim in agricultural products or environment is challenging but important. A sensitive and recyclable SERS substrate based on a three-dimensional cactus-like Ag nanoparticles/CuO/Cu2O nanocomposite (CACN) has been developed, which has excellent sensitivity, reproducibility, and recyclability.
ACS APPLIED NANO MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Peifa Yang, Zhuanfang Bi, Guangyi Shang
Summary: In this study, the morphological evolution of Spinel LiMn2O4 submicron-sized particles during over-discharging was successfully tracked using home-made electrochemical high-speed atomic force microscopy (EC-HS-AFM). The formation of nanoscale wrinkle-like and step-like structures on the particle surface was observed, which could be resulted from the complex stresses during the phase transformation. The correlation between the over-discharge-induced surface morphology changes and the irreversibility of Li-ion insertion/extraction as well as capacity fading was established.