Article
Chemistry, Applied
Nopparat Sangtong, Thanyalak Chaisuwan, Sujitra Wongkasemjit, Hatsuo Ishida, Wikrom Redpradit, Kessara Seneesrisakul, Uthen Thubsuang
Summary: This study developed an electrode material based on activated biocarbon from rubber wood sawdust waste using alkali activating agents. The impact of alkali metal atom sizes on pore structure was studied, as well as the influence of standard reduction potentials on electrochemical performance. The activated biocarbons showed microporous or mesoporous characteristics depending on the alkali activating agent used, with different specific surface areas and capacitance values.
MICROPOROUS AND MESOPOROUS MATERIALS
(2021)
Article
Thermodynamics
Jie Cheng, Sheng-Chun Hu, Guo-Tao Sun, Kang Kang, Ming-Qiang Zhu, Zeng-Chao Geng
Summary: By treating cotton stalk using one-step and two-step activation processes, activated carbons with varying specific surface areas, mesopores pore volumes, and specific capacitances were synthesized. Biomass-derived activated carbons exhibited better electrochemistry characteristics compared to biochar-derived activated carbons, making them promising materials for advanced energy storage applications in supercapacitors.
Article
Chemistry, Physical
Sedahmed Osman, Raja Arumugam Senthil, Junqing Pan, Lulu Chai, Yanzhi Sun, Yufeng Wu
Summary: In this study, hierarchically activated porous carbon (APC) was synthesized and its surface structures and electrochemical performance were systematically studied under different activation conditions. The APC electrode exhibited high specific capacitances, excellent rate capacity, and very-long cyclic life, demonstrating its potential for large-scale application in energy storage systems.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2021)
Article
Energy & Fuels
Monojit Mondal, Dipak Kumar Goswami, Tarun Kanti Bhattacharyya
Summary: The study focuses on synthesizing activated porous carbon using a high-temperature controlled heating process in an inert atmosphere with bio-waste materials' KOH activation process. The activated porous carbon exhibits high specific surface area, specific capacitance, and long cycle stability, making it a prospective candidate for new functional materials in energy storage applications.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Chemistry, Applied
T. Manimekala, R. Sivasubramanian, S. Karthikeyan, Gnanaprakash Dharmalingam
Summary: Biomass-derived activated carbon prepared from peanut shells was used as an electrode material for supercapacitors. The material showed high specific capacitance and cycling stability after activation. The properties of the material were characterized using various techniques, and its electrochemical behavior and performance were studied.
JOURNAL OF POROUS MATERIALS
(2023)
Review
Engineering, Environmental
Shashank Sundriyal, Vishal Shrivastav, Hong Duc Pham, Sunita Mishra, Akash Deep, Deepak P. Dubal
Summary: This review focuses on the development of electrode materials for supercapacitors using bio-wastes, highlighting the influence of different precursors on surface characteristics and the surface modification methods. The supercapacitive properties of activated carbons derived from various feedstocks are systematically summarized, and future challenges and directions for research in this area are discussed.
RESOURCES CONSERVATION AND RECYCLING
(2021)
Article
Chemistry, Physical
Tingting Yang, Yufang Cao, Yingying Yu, Dapeng Liu, Yuyan Ma, Huili Fu, Zhengpeng Yang, Dandan Liu, Yongyi Zhang
Summary: A novel compact carbon paper electrode with high conductivity and porosity has been designed in this study. This electrode addresses the issues of traditional porous activated carbon electrodes and maintains excellent performance even at high charging rates, showing great potential for practical applications.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Analytical
E. Elanthamilan, B. Catherin Meena, N. Renuka, M. Santhiya, Joshua George, E. P. Kanimozhi, J. Christy Ezhilarasi, J. Princy Merlin
Summary: This study presents a facile method to convert walnut shells into porous activated carbon for supercapacitor applications. It was found that activated carbon obtained at different activation temperatures exhibited variations in performance, with the sample produced at 800 degrees Celsius showing the highest specific capacitance and cycle stability.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2021)
Article
Energy & Fuels
Jialian Chen, Yuting Lin, Jinling Liu, Dandan Wu, Xin Bai, Denglong Chen, Hongzhou Li
Summary: Nitrogen doping can improve the electrochemical properties of activated carbon, but excessive doping may decrease the specific surface area. The nitrogen-doped shaddock peel-based activated carbon prepared in this study exhibited excellent mass specific capacity and cycling stability in potassium hydroxide electrolyte.
JOURNAL OF ENERGY STORAGE
(2021)
Article
Energy & Fuels
Wenhao Peng, Zilong Su, Jiajun Wang, Shuji Li, Kaixuan Chen, Ningning Song, Shiping Luo, Aijuan Xie
Summary: Spherical MnCoOx and MnCoOx-multi-walled carbon nanotubes (MnCoOx-MWCNTs) composites were synthesized and used as electrode materials for supercapacitors. The properties of different MnCoOx samples with various Co/Mn molar ratios and MnCoOx-MWCNTs samples with different MWCNTs qualities were evaluated using various electrochemical test methods. The results showed that the MnCoOx-MWCNTs composite with a Co/Mn molar ratio of 1:1 and 0.1 g MWCNTs exhibited a high discharge capacitance of 930.00 F g(-1) at a current density of 1.0 A g(-1). The specific capacitance retention rate of the optimal MnCoOx-MWCNTs composite remained at 88.2% after 5000 cycles at a current density of 8.0 A g(-1). Therefore, the MnCoOx-MWCNTs composite shows great potential as an electrode material for supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Green & Sustainable Science & Technology
Sheng-Chun Hu, Jie Cheng, Wu-Ping Wang, Guo-Tao Sun, Li-Le Hu, Ming-Qiang Zhu, Xiao-Hua Huang
Summary: This study investigates the performance of activated carbons prepared from lacquer wood through one-step and two-step activation processes at different temperatures in supercapacitor applications. The results show that the AC generated through the one-step activation process at 400 degrees Celsius exhibits superior specific surface area compared to those from the two-step activation method. Additionally, biomass-derived ACs demonstrate better electrochemical properties than those derived from charcoal. The study suggests that LW-derived ACs are promising electrodes for high-performance supercapacitors, providing valuable guidance for their industrial application.
Review
Chemistry, Multidisciplinary
Fitri Aulia Permatasari, Muhammad Alief Irham, Satria Zulkarnaen Bisri, Ferry Iskandar
Summary: The translated paragraph introduces carbon-based quantum dots (C-QDs) as materials for supercapacitors, with superior optoelectronic properties and great application potential, in either bare electrode or composite form to enhance supercapacitor performances. The review also highlights the latest progress and application prospects of C-QDs in the field of supercapacitors.
Article
Materials Science, Multidisciplinary
Raman Devi, Vinay Kumar, Sunil Kumar, Avnish Kumar Sisodiya, Ajay Kumar Mishra, Anushree Jatrana, Ashwani Kumar, Paul Singh
Summary: Green nanotechnology aims to address global sustainability issues by recycling industrial and bio-wastes to produce functional carbonaceous nanomaterials. In this study, activated carbon (AC) was synthesized from walnut shell through a hydrothermal decomposition approach. The synthesized AC exhibited a high specific surface area of 408.8 m2/g and excellent specific capacitance of 204F/g at 1 A/g current density, with good cyclability up to 10,000 cycles.
Article
Chemistry, Physical
Jingrui Huang, Xiaoru Meng, Guangzhao Zhu, Yihang Song, Shoupu Zhu, Ming Chen, Qi Li, Yue Zhou, Meng -Chang Lin
Summary: Thermally oxidized activated carbon (TOAC), acidified activated carbon (AAC), and thermally deoxygenized AC (TAC) were prepared. TOAC showed the highest oxygen content and specific surface area among the three types of activated carbon. TOAC exhibited a significantly higher capacitance than AC, AAC, and TAC, indicating the synergistic effect of anchoring oxygen and large specific surface area on capacitance performance. The oxygen content enhanced the wettability between electrode and electrolyte, while the large specific surface area facilitated ions adsorption and ionic diffusion and transport.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
B. Said, O. Bacha, Y. Rahmani, N. Harfouche, H. Kheniche, D. Zerrouki, H. Belkhalfa, A. Henni
Summary: In this study, activated carbon was produced from date seeds by hydrothermal treatment and KOH chemical activation for supercapacitor electrode materials. The activated biomass samples were characterized by SEM, EDX, FTIR, and XRD. The results showed a homogeneous and microporous structure without larger pores. The prepared activated carbon exhibited excellent electrochemical performance with a maximum specific capacity of 179 Fg-1 at 5 mVs-1 and the highest discharge capacity of 159 Fg-1 at 0.2 Ag-1. The electrodes showed good stability after 5500 galvanic charge and discharge cycles. The prepared electrodes have promising electrochemical performances for energy storage applications.
INORGANIC CHEMISTRY COMMUNICATIONS
(2023)
Review
Chemistry, Physical
Qianyu Hu, Kunfeng Chen, Fei Liu, Mengying Zhao, Feng Liang, Dongfeng Xue
Summary: This paper provides an overview of the application and challenges of machine learning in materials prediction. Taking solid-state electrolytes as an example, it outlines the general process of machine learning in materials prediction and reviews recent approaches and specific applications. The paper also highlights the obstacles caused by disciplinary span and aims to raise awareness among materials scholars about the application of machine learning in materials prediction.
Review
Chemistry, Multidisciplinary
Xiangfei Sun, Kunfeng Chen, Feng Liang, Chunyi Zhi, Dongfeng Xue
Summary: This article reviews the material design and manufacturing technology of different micro-supercapacitors (MSCs) in recent years, along with the integration of their devices to achieve target applications. The future development directions and challenges of MSCs are also critically discussed.
FRONTIERS IN CHEMISTRY
(2022)
Article
Engineering, Electrical & Electronic
Ming Li, Xin Xia, Kunpeng Li, Shuxian Wu, Jie Zou, Kunfeng Chen, Gongbin Tang
Summary: SAW resonators based on 36 degrees YX-LiTaO3/SiO2/4H-SiC multilayer substrates are fabricated in this work to effectively suppress acoustic energy leakage. By using interdigital transducers (IDT) with a tilted angle, a multilayer resonator with transverse mode suppression is achieved. The results show that the multilayer resonator exhibits extremely high Bode-Q and impedance ratio, and achieves a high figure of merit.
IEEE ELECTRON DEVICE LETTERS
(2022)
Review
Materials Science, Multidisciplinary
Guoqiang Shi, Dongfeng Xue
Summary: Functional materials exhibit diverse performances due to degrees of freedom in the lattice framework. Research on quantum materials can provide insights into multiscale processes. Understanding the sources of properties of functional materials from multiple degrees of freedom is crucial for their design.
PROGRESS IN NATURAL SCIENCE-MATERIALS INTERNATIONAL
(2022)
Article
Physics, Applied
Feng Liu, Kunfeng Chen, Chao Peng, Dongfeng Xue
Summary: This study investigates the multiscale behaviors of sapphire crystal growth along different crystal directions through theoretical and experimental studies. The results show that the growth behavior of sapphire along the c-axis is more complex compared to that along the a- and m-axes, involving solid-liquid and solid-solid transformations. Moreover, an abrupt change in the interfacial structure inhibits the transformation of liquid Al2O3 into α-Al2O3 along the c-axis.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Chun Cai, Dantong Zhang, Qi Zhang, Kunfeng Chen, Wenchao Hua, Chao Peng, Dongfeng Xue
Summary: The stability of lattice oxygen and transition metal sites in LiNi0.8Co0.1Mn0.1O2 (NCM811) cathode were systematically explored, and the importance of manganese was demonstrated. The effects of lithium vacancies on lattice oxygen and transition metal were investigated through vacancy formation energy, unpaired spins, and net charge. This study provides insights into oxygen release and transition metal dissolution in Ni-rich NCM811.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Editorial Material
Multidisciplinary Sciences
Feng Liu, Kunfeng Chen, Dongfeng Xue
Summary: Large-size crystals are essential in various fields, but their preparation remains difficult. Making breakthroughs in the theory and technology of large-size crystal growth is one of the top challenges in science and technology. Artificial intelligence is expected to play a significant role in achieving fast and large-size crystal growth.
Article
Chemistry, Multidisciplinary
Fei Liu, Mengying Zhao, Kunfeng Chen, Mei Hu, Dongfeng Xue
Summary: This work demonstrates that Ce3+-regulated CoNi-LDHs significantly enhance the kinetics of electron transfer and ion motion by increasing layer positive charges and weakening O-H bonds. The addition of Ce3+ also decreases the energy barrier of proton diffusion and increases the hole carrier concentration, resulting in high rate capacitance and fast charge storage kinetics.
Article
Chemistry, Multidisciplinary
Xianjie Zhang, Feng Liu, Kunfeng Chen, Guilin Zhuang, Chao Peng, Dongfeng Xue
Summary: Investigating the liquid structure of yttrium aluminum garnet (YAG) at high temperatures is significant for various fields, and molecular dynamic simulations were used to study the structure of YAG within a certain temperature range and to grow a YAG single crystal. The coordination number and bond length between cations and anions changed after melting, which can be explained by Pauling's third rule. In the liquid YAG, the coordination number decreased and the main structural units were AlO4 and YO7, which provided insight into phase selection and enabled rapid growth of YAG using the Czochralski method.
Proceedings Paper
Engineering, Electrical & Electronic
Ming Li, Xin Xia, Kunpeng Li, Shuxian Wu, Kunfeng Chen, Jie Zou, Gongbin Tang
Summary: SAW devices based on multilayer substrate offer excellent solution for higher performance filters in the RF industry due to their high-quality factors, small temperature coefficient of frequency, and high stability. In this study, SAW resonators based on a multilayer substrate were simulated and fabricated, achieving a spurious free response and high figure of merit through careful selection of material thickness and calculation of power flow angle.
2022 IEEE MTT-S INTERNATIONAL MICROWAVE WORKSHOP SERIES ON ADVANCED MATERIALS AND PROCESSES FOR RF AND THZ APPLICATIONS, IMWS-AMP
(2022)
