Article
Chemistry, Multidisciplinary
Niraj Kumar, Dhananjay Mishra, Ajit Kumar, Bidyashakti Dash, Rajneesh Kumar Mishra, Junyoung Song, Sung Hun Jin
Summary: This study presents the synthesis and characterization of a novel electrode material for supercapacitor applications, consisting of a clustered heterostructure of indium sulfide (In2S3) and single-walled carbon nanotubes (SWCNTs). The In2S3-SWCNT (INSC) sample was prepared using a facile successive ionic layer adsorption and reaction (SILAR) method, and exhibited higher specific capacitance (258 Fg(-1) at 1 Ag-1) compared to the bare indium sulfide electrode. The enhanced electrochemical performance can be attributed to the synergistic effect between In2S3 and SWCNTs, which improves electron transportation, catalytic nature, and specific capacitance. Moreover, the INSC electrode demonstrates excellent cyclic stability, retaining 96.8% of the initial capacitance after 3000 cycles. These findings suggest the potential of INSC-based supercapacitor devices for next-generation energy storage, especially in flexible applications.
APPLIED SCIENCES-BASEL
(2023)
Article
Electrochemistry
Fang Xu, Qing Xia, Guoping Du, Zhaoyang Fan, Nan Chen
Summary: Developing a sophisticated material architecture to provide mechanical strength, excellent conductivity, and large surface area for TMPs is a pressing need to improve supercapacitor performance. In this study, coral-like interconnected Ni2P nanoparticles dispersed on porous amorphous carbon matrix were reported, showing superior electrochemical performance.
ELECTROCHIMICA ACTA
(2021)
Article
Energy & Fuels
Ozlem Budak, Ozlem Uguz, Atif Koca
Summary: In this study, a one-step electrodeposition method was used to fabricate binder free nickel cobalt oxide and nickel cobalt oxide reduced graphene oxide composite nanosheets, which exhibited excellent electrochemical performance with high specific capacitance and superior stability. Moreover, the potential of the NCO-rGO composite nanosheets in practical applications was demonstrated by constructing an asymmetric supercapacitor.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Multidisciplinary
Shalendra Kumar, Faheem Ahmed, Nagih M. Shaalan, Nishat Arshi, Saurabh Dalela, Keun Hwa Chae
Summary: Fe-doped ZnO nanostructures were prepared using microwave irradiation and investigated for their structural, morphological, magnetic, electronic structural, specific surface area and electrochemical properties as supercapacitor electrodes. The nanocrystalline structures possessed a hexagonal wurtzite structure, with rods and nanosheet-like morphology observed. Fe doping increased the saturation magnetization and specific capacitance, with the highest capacitance observed at 3% doping. The Fe-doped ZnO electrode displayed excellent cyclic stability and is suitable for energy storage applications.
Review
Materials Science, Multidisciplinary
Xudong Liu, Shufan Chen, Zhengwei Xiong, Kailin Li, Yuxin Zhang
Summary: This review presents the development history and charge storage mechanisms of WO3-x-based electrode materials for pseudocapacitors. The various synthesis strategies and the relationship between microstructure and electrochemical performance are highlighted. The device performance and multifunctional applications of WO3-x-based supercapacitors are introduced. Finally, the challenges and future directions for further development of high-performance WO3-x-based supercapacitors are discussed.
PROGRESS IN MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Abdul Rehman Akbar, Adil Saleem, Abdur Rauf, Rashid Iqbal, Muhammad Tahir, Gangqiang Peng, Abdul Sammed Khan, Arshad Hussain, Muhammad Ahmad, Mansoor Akhtar, Mumtaz Ali, Chuanxi Xiong, Quanling Yang, Ghaffar Ali, Fude Liu
Summary: In this study, a dually activated carbon cloth is used as the functional current collector to design a high-performance freestanding asymmetric supercapacitor. The integrated electrode shows exceptional capacitance performance and enhanced areal energy and power density. The device exhibits a broad voltage window and extraordinary cycling stability.
JOURNAL OF POWER SOURCES
(2023)
Review
Chemistry, Applied
Joao Pedro Aguiar dos Santos, Fernando Cesar Rufino, Joao I. Yutaka Ota, Rodolfo C. Fernandes, Rafael Vicentini, Cesar J. B. Pagan, Leonardo Morais Da Silva, Hudson Zanin
Summary: In this paper, the essential aspects of experimental supercapacitor characterization using well-known electrochemical methods are discussed. The authors address the issue of misreported procedures and results in many publications, which often lack crucial information about the electrochemical analytical apparatus and its configuration. The consequences of this lack of information are highlighted, and fundamental concepts of various electrochemical analytical methods are explained. The importance of correct setup and data analysis in obtaining reliable results for supercapacitors is emphasized.
JOURNAL OF ENERGY CHEMISTRY
(2023)
Article
Energy & Fuels
Shijie Li, Tao Xing, Yilin Wang, Pengwei Lu, Weixue Kong, Shenao Li, Xiaomin Su, Xinkuan Wei
Summary: The effects of experimental parameters on the pore structure characteristics of sargassum-based activated carbon were studied through orthogonal experiments. The activated carbons showed developed pore structure and large specific surface area, reaching 3,122 m(2)/g. The gravimetric capacitance and specific surface area of SACs exhibited a good linear relationship under similar material properties and pore size distribution.
FRONTIERS IN ENERGY RESEARCH
(2021)
Article
Engineering, Environmental
Jiayu Wang, Fengxiang Zhang, Zhen Xu, Wei Hu, Haihui Jiang, Libin Liu, Ligang Gai
Summary: Gallium oxynitride (GON) is emerging as an efficient component in the field of energy storage and conversion, with its structure closely related to its physi-/electrochemical properties. By controlling the preparation conditions, the performance of GON can be tuned, and it can maintain a high capacitance retention after long-term cycling tests.
CHEMICAL ENGINEERING JOURNAL
(2021)
Article
Chemistry, Multidisciplinary
Nuha A. Alhebshi, Numan Salah, Humair Hussain, Yousef N. Salah, Jian Yin
Summary: This study demonstrates the conversion of biomass waste from date palm fronds into activated carbon with a hierarchical porous nanostructure, which exhibits high specific surface area and specific capacitance in supercapacitor applications.
Article
Chemistry, Physical
Jiaqi Shen, Xiaozhen Chen, Peng Wang, Feng Zhou, Lei Lu, Rongfang Wang, Vladimir Linkov, Shan Ji
Summary: A new material for supercapacitors, HPZC, loaded with a unique porous structure and a 2D material, demonstrates high power and energy densities with improved charge/mass transport efficiency. This study paves the way for designing transition metal carbodiimide materials as potential electrodes in asymmetric supercapacitors.
APPLIED SURFACE SCIENCE
(2021)
Article
Nanoscience & Nanotechnology
Syedah Afsheen Zahra, Babak Anasori, Muhammad Z. Iqbal, Florent Ravaux, Mohammednoor Al Tarawneh, Syed Rizwan
Summary: The study reports V2CTx MXene and multiwall carbon nanotube composites as electrode materials for hybrid energy storage devices, showing excellent electrochemical performance and good cyclic stability.
Article
Materials Science, Ceramics
Shiju Yang, Libing Qian, Yunjie Ping, Haoliang Zhang, Jingjing Li, Bangyun Xiong, Pengfei Fang, Chunqing He
Summary: This study investigated the impact of vacancy defects on the physical-chemical properties of Bi2O3 powders used as supercapacitor electrodes. It was found that the h-Bi2O3 sample with more V'''BiVO++V'''(Bi) defects exhibited better cycle stability and rate performance, attributed to the insertion/extraction process of K+ ions in the surface defects. Furthermore, the high concentration of V'''BiVO++V'''(Bi) defects in the h-Bi2O3 electrode led to improved conductivity and higher specific energy density in an asymmetric supercapacitor configuration.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Maziar A. Farshadnia, Ali A. Ensafi, K. Zarean Mousaabadi, B. Rezaei
Summary: A spongy nanostructure of graphene oxide was synthesized and combined with CoNi2S4 and MoS2 nanocomposites to enhance the performance of the final nanocomposite, showing improved specific capacitance, stability, and energy/power density for supercapacitor application.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Review
Nanoscience & Nanotechnology
Yongpeng Ma, Xiubo Xie, Wenyue Yang, Zhipeng Yu, Xueqin Sun, Yuping Zhang, Xiaoyang Yang, Hideo Kimura, Chuanxin Hou, Zhanhu Guo, Wei Du
Summary: This study summarizes recent advances in transition metal oxides as electrodes for high-performance supercapacitors in different dimensions, highlighting the importance of the relationship between structure and property in designing and synthesizing high-performance transition metal oxide-based supercapacitor electrodes.
ADVANCED COMPOSITES AND HYBRID MATERIALS
(2021)
Review
Energy & Fuels
Ming Zhang, Yanshuo Liu, Dezhi Li, Xiaoli Cui, Licheng Wang, Liwei Li, Kai Wang
Summary: With the increasing application scope and scale of lithium-ion batteries, real-time and accurate monitoring of its state of health plays an important role in ensuring the healthy and stable operation of an energy storage system. Recently, electrochemical impedance spectroscopy has been developed to estimate the state of health quickly and accurately online by measuring battery impedance in a wide frequency range. This paper summarizes the latest impedance spectroscopy measurement technology and its application in estimating the health state of lithium-ion batteries, filling the gap in this aspect and contributing to the further development of this technology.
Article
Energy & Fuels
Jia Wei, Wei Shi, Jingrou Ran, Jing Pu, Jiyang Li, Kai Wang
Summary: This study measured the lifecycle carbon emissions of buildings in 30 Chinese provinces and investigated the drivers and spatial effects of carbon emissions in the building sector. The findings showed a high concentration of carbon emissions in the east and a low concentration in the west of China, along with significant spatial autocorrelation and opposite spatial spillover effects in the materialization and operation stages. Specific policy recommendations were made to help the building sector achieve carbon peaking and neutrality goals.
Article
Thermodynamics
Junjie Teng, Kai Wang, Shaolong Zhu, Shiran Bao, Xiaoqin Zhi, Xiaobin Zhang, Limin Qiu
Summary: This paper evaluates the application effects of three methods for converting hydrogen ortho-para hydrogen saturation on the hydrogen liquefaction process, as well as differences in temperature distribution, conversion heat consumption, and energy consumption indicators. The optimization results show that the continuous conversion method can complete the hydrogen liquefaction process with the lowest energy consumption, reducing energy consumption by 21.8% and 28.7% compared to adiabatic and isothermal conversion methods, respectively. Thermochemical analysis results show that the exergy consumption associated with dissipating conversion heat is lowest for the continuous conversion method, followed by adiabatic conversion, and the highest for isothermal conversion.
Article
Computer Science, Artificial Intelligence
Tianfei Zhou, Fatih Porikli, David J. Crandall, Luc Van Gool, Wenguan Wang
Summary: Video segmentation is crucial in various practical applications such as enhancing visual effects in movies, understanding scenes in autonomous driving, and creating virtual background in video conferencing. Deep learning-based approaches have shown promising performance in video segmentation. This survey comprehensively reviews two main research lines - generic object segmentation and video semantic segmentation - by introducing their task settings, background concepts, need, development history, and challenges. Representative literature and datasets are also discussed, and the reviewed methods are benchmarked on well-known datasets. Open issues and opportunities for further research are identified, and a public website is provided to track developments in this field: https://github.com/tfzhou/VS-Survey.
IEEE TRANSACTIONS ON PATTERN ANALYSIS AND MACHINE INTELLIGENCE
(2023)
Article
Engineering, Biomedical
Jiawen Wang, Ziqing Cheng, Duanjing Chen, Guangyue Li, Jie Chen, Kai Wang, Ling Xu, Jiao Huang
Summary: Magnesium phosphate cement (MPC) has been modified to be porous by using calcium carbonate and citric acid as foaming agents. The resulting MPC with 3% CaCO3/CA showed improved physicochemical properties and enhanced biocompatibility. In animal experiments, 3%CaCO3/CA-MPC exhibited better bone regeneration compared to the blank group, and slightly lower regeneration compared to the Bio-Oss(R) group. This study suggests that porous MPC foamed with calcium carbonate and CA is a promising material for bone regeneration.
JOURNAL OF THE MECHANICAL BEHAVIOR OF BIOMEDICAL MATERIALS
(2023)
Article
Engineering, Mechanical
Kai Wang, Lihua Yang, Haoze Wang, Xilong Ji, Kaidi Zhu
Summary: This paper investigates the dynamic response of offset-elliptical journal bearings (OEJBs) under the conditions of journal misalignment and sudden load. A hydrodynamic model is developed and validated for the transient analysis of the OEJBs. The study reveals that the misalignment and dynamic load have a significant impact on the transient performance of OEJBs.
PROCEEDINGS OF THE INSTITUTION OF MECHANICAL ENGINEERS PART J-JOURNAL OF ENGINEERING TRIBOLOGY
(2023)
Article
Energy & Fuels
Kai Wang, Qian Wang, Lianglin Zou, Ying Su, Kunhao Liu, Wei Li, Kexin Zhang, Haiyu Wang, Jifeng Song
Summary: Daylighting system using optical fiber to concentrate and transmit sunlight is a promising technology for utilizing solar energy. This study developed a sunlight concentrating and transmitting system using plastic optical fibers and addressed the issue of overheating. By filtering out infrared light, the developed filter system ensured the safe operation of the plastic optical fibers. Experiments showed that the system can work at a concentration level of about 4300 suns, demonstrating the feasibility of using low-cost plastic optical fibers for highly concentrated daylighting system.
Article
Multidisciplinary Sciences
Zhenqi Gu, Jiale Ma, Feng Zhu, Ting Liu, Kai Wang, Ce-Wen Nan, Zhenyu Li, Cheng Ma
Summary: In this study, the role of space-charge layers in Li0.33La0.56TiO3, a solid electrolyte, was investigated through experimental and computational methods. Contrary to previous assumptions, it was found that the actual space-charge layers are Li-excess instead of Li-deficient. The efficient ion transport in these Li-excess layers excluded them as potential bottlenecks, identifying Li-depleted grain-boundary cores as the major cause of the large resistance.
NATURE COMMUNICATIONS
(2023)
Article
Engineering, Multidisciplinary
Xiaofei Yu, Ning Ma, Lei Zheng, Licheng Wang, Kai Wang
Summary: With the developments in information technology, advanced computer and information technology have been applied in the field of music. Artificial Intelligence (AI), as a product of rapid development, brings new elements to music education. This paper analyzes the advantages of AI in music education, summarizes its application, and discusses its future prospects. By combining intelligent technology and on-site teaching, AI addresses the lack of personalization in traditional education and increases students' interest in learning.
Article
Engineering, Multidisciplinary
Xiaofei Yu, Yanke Li, Xiaonan Li, Licheng Wang, Kai Wang
Summary: This paper proposes a new dynamic redundant battery management algorithm based on the existing fault-tolerant structure of a lithium battery pack. By adjusting the internal configuration according to the SOC of each battery and dynamically allocating the power supply battery, it effectively extends the battery working time and improves energy utilization.
Article
Computer Science, Artificial Intelligence
Wenqi Wang, Run Wang, Lina Wang, Zhibo Wang, Aoshuang Ye
Summary: Deep neural networks have achieved remarkable success in various tasks, but they are vulnerable to adversarial examples in both image and text domains. Adversarial examples in the text domain can evade DNN-based text analyzers and pose threats to the spread of disinformation. This paper comprehensively surveys the existing studies on adversarial techniques for generating adversarial texts and the corresponding defense methods, aiming to inspire future research in developing robust DNN-based text analyzers against known and unknown adversarial techniques.
IEEE TRANSACTIONS ON KNOWLEDGE AND DATA ENGINEERING
(2023)
Article
Engineering, Electrical & Electronic
Ming Zhang, Wanli Wang, Guoting Xia, Licheng Wang, Kai Wang
Summary: In this study, a self-powered electronic skin (SPES) based on a piezoelectric nanogenerator (PENG) was designed to achieve gesture recognition and tracking by sensing external pressure stimulation. The equivalent behavior trigger of intelligent robots and SPES can be realized through feedback control of the closed-loop system. SPES and HRPS have small perceptual errors, and wireless transmission equipment enables remote signal feedback and behavior control of intelligent robots, which is advantageous in a flexible environment.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Chemistry, Physical
Chaoyue Shi, Shaolong Zhu, Chuancong Wan, Shiran Bao, Xiaoqin Zhi, Limin Qiu, Kai Wang
Summary: A composite thermal insulation system combining variable-density multi-layer insulation (VDMLI), vapor-cooled shields (VCS), and para-ortho hydrogen (P-O) conversion is proposed for long-term storage of liquid hydrogen. The study focuses on reducing heat leak and maximizing thermal insulation performance. Various design considerations are explored, and the results indicate significant reductions in heat leak with the use of VCS and catalysts.
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
(2023)
Article
Engineering, Electrical & Electronic
Ming Zhang, Wanli Wang, Guoting Xia, Licheng Wang, Kai Wang
Summary: A self-powered electronic skin (SPES) based on a piezoelectric nanogenerator (PENG) was designed to enable gesture recognition and tracking in human-machine interaction (HMI). The SPES and Robot Hall Rotary Position Sensor (HRPS) have small perceptual errors and can achieve wireless transmission for remote signal feedback and behavior control.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Review
Energy & Fuels
Shuhui Cui, Saleem Riaz, Kai Wang
Summary: This paper discusses the characteristics and applications of lithium-ion capacitors, as well as their aging mechanisms and life prediction techniques. The study analyzes factors such as cell composition, electrode charge state, temperature, and electrolyte deterioration to propose different models for lifespan prediction. It also introduces techniques for cycle testing and accelerated aging experiments.
Article
Electrochemistry
Wenhai Tan, Youfeng Zhang, Yichen Zhang, Yanbo Ma, Chao Zhao, Yinling Wang
Summary: This study synthesized Co3O4/CC cathode materials with excellent performance for aqueous zinc-ion batteries by varying the reactant concentration. The Co3O4/CC nanowires exhibited uniform distribution, regular surface, and small size on the carbon cloth. The battery assembled with Co3O4/CC material synthesized at a reactant concentration ratio of 2:1 showed better performance, with high discharge specific capacity and capacity retention rate.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Article
Electrochemistry
T. Salahuddin, Iqra Kousar, Mair Khan, M. Munawwar Iqbal Ch
Summary: This paper investigates the dynamics of fluid motion powered by cilia within a curved channel and examines the chemical reactions occurring in the presence of electro-osmotic impact. The findings offer insights into various flow characteristics and present a method for simulating non-Newtonian fluid models in three dimensions. Additionally, the model has potential applications in the development of micro-vascular chips, which could be crucial for diagnosing blood-related issues.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
Review
Electrochemistry
Ahmed Abou-Shady
Summary: Soil electrokinetic (SEK) is a significant technology with various applications in fields such as soil remediation, pollutant removal, and water regulation. This review summarizes the recent advancements in SEK, focusing on electrode modifications and material additives, and suggests future research directions.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2024)
