Article
Materials Science, Multidisciplinary
Monika Michalska, Mariusz Andrzejczuk, Agnieszka Krawczynska, Agata Roguska, Kostiantyn Nikiforow, Patrycja Zurek, Andrzej Sikora, Pavlina Peikertova
Summary: In this study, lithium titanium oxide (Li4Ti5O12) particles were surface-modified with 1-5% wt. of multi-walled carbon nanotubes (MWCNT) using a new low temperature method. Various analytical techniques were applied to characterize the materials, revealing that the crystal structure of LTO was not affected by MWCNT modification. The electrochemical analysis showed that the LTO powder modified with 1%wt. of MWCNT exhibited the best electrochemical performance, retaining over 98% of its specific capacity after 50 cycles of charge/discharge processes at a current rate of 1 C.
DIAMOND AND RELATED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Wenhao Peng, Kaixuan Chen, Shuji Li, Jiajun Wang, Zilong Su, Ningning Song, Chen Zhang, Shiping Luo, Aijuan Xie
Summary: In this study, spherical spinel NiMn2O4 was in-situ grown on MWCNT using solvothermal method, and NiMn2O4/MWCNT-1.0 was prepared by sol-gel method for comparison. The effect of preparation methods and MWCNT content on the specific capacitance of the composite was investigated. The results showed that NiMn2O4/MWCNT-1.0 composite prepared by solvothermal method with an addition of 1.0 g MWCNT exhibited the highest specific capacitance, energy density, and power density. The combination of NiMn2O4 and MWCNT significantly improved the diffusion coefficient of OH- ions, and the diffusion coefficient of NiMn2O4/MWCNT-1.0 prepared by solvothermal method was about 320 times that of sol-gel method. The capacitance retention rate after 5000 cycles was approximately 64%.
DIAMOND AND RELATED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Duan-Chao Wang, Hou-Yong Yu, Zhaofeng Ouyang, Dongming Qi, Ying Zhou, Anqi Ju, Ziheng Li, Yiwen Cao
Summary: In this study, composite fibers with chain-ring structures were prepared by connecting cellulose nanofiber (CNF) and multi-walled carbon nanotubes (MWCNT) covalently, solving the problems of MWCNT aerogel formation and phase separation during compounding. The resulting aerogels exhibited mechanical resilience and chain-ring fibers, enabling high compression resistance and application in flexible supercapacitors and sensors.
Article
Energy & Fuels
Puja De, Debabrata Mandal, Sudipta Biswas, Abhishek Kumar, Surbhi Priya, Brajesh Kumar Dubey, Alok Kumar Srivastava, Amreesh Chandra
Summary: The slow kinetic nature and poor cycling performance of bulk Na2Ti3O7 (NTO) can be improved by fabricating hierarchical nanostructures. The interconnected 1D nanotubular particles show a much higher electrochemical performance compared to 2D flakes or 3D pillar-like morphologies. High-performance Na-ion supercapacitors can be fabricated using these materials.
Article
Chemistry, Multidisciplinary
Arkady N. Redkin, Alena A. Mitina, Eugene E. Yakimov
Summary: Significant progress has been made in the performance of supercapacitors through the development of composite electrodes that combine various charge storage mechanisms. This study proposes a new method for preparing composite binder-free MnO2/MWCNT/Al electrodes for supercapacitors, which demonstrated excellent charge/discharge characteristics and stability to multiple cycles.
Article
Chemistry, Physical
Wenhao Peng, Zilong Su, Kaixuan Chen, Jiajun Wang, Bowen Chen, Shixin Jiang, Jinyang Yan, Shiping Luo, Aijuan Xie
Summary: Supercapacitors have emerged as a promising energy storage device due to their unique advantages, and the choice of suitable electrode materials plays a crucial role in improving their performance. In this study, a series of CuFexMn2-xO4-MWCNT-y spinel composites were successfully synthesized via a solvothermal method. The CuFe0.4Mn1.6O4-MWCNT-3 modified electrode demonstrated the highest specific capacitance of 656.7 F.g(-1) at a current density of 1.0 A.g(-1), with good cycling stability of 80.6% capacitance retention after 5000 cycles at a current density of 8.0 A.g(-1). Moreover, the CuFe0.4Mn1.6O4-MWCNT-3//activated carbon (AC) asymmetric supercapacitor exhibited a higher capacitance of 104.0 F.g(-1) at 1.0 A.g(-1), with a maximum energy density of 30.43 Wh.kg(-1) and power density of 3500 W.kg(-1). These results suggest that the CuFe0.4Mn1.6O4-MWCNT-3 composite holds great potential for energy storage applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Physical
Arkady N. Redkin, Alena A. Mitina, Eugene E. Yakimov, Evgeny N. Kabachkov
Summary: The study utilized a novel CVD technique to directly grow multiwall carbon nanotubes on aluminum foil, and achieved a significant increase in the specific capacity of MWCNTs through simple electrochemical oxidation, further improving the performance of MWCNT/Al electrodes. The modified electrodes showed excellent stability and capacitance, making them a promising electrode material for supercapacitors.
Article
Physics, Applied
Toton Haldar, Utkarsh Kumar, B. C. Yadav, V. V. Ravi Kanth Kumar
Summary: The study synthesized multiwall carbon nanotubes using a modified CVD method at different temperatures, investigated their structural and magnetic properties using various characterization techniques, and found that growth temperature and acid functionalization affect the diameter and density of nanotubes.
JOURNAL OF APPLIED PHYSICS
(2021)
Article
Nanoscience & Nanotechnology
Haojie Li, Wenchao Tong, Zhenzhan Yan, Long Li, Shuang Wang, Junda Huo, Li Yang, Jimin Han, Xiaoting Ren, Wei Li
Summary: In this study, micro-nanospherical CL-20@MOF-199 composites were prepared using the spray-drying self-assembly technique. MOF-199, acting as a combustion catalyst and safety regulator, was uniformly coated on the surface of CL-20, resulting in enhanced thermal decomposition and safety performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Nanoscience & Nanotechnology
Haojie Li, Wenchao Tong, Zhenzhan Yan, Long Li, Shuang Wang, Junda Huo, Li Yang, Jimin Han, Xiaoting Ren, Wei Li
Summary: In this study, micro-nanospherical CL-20@MOF-199 composites were prepared using the spray-drying self-assembly technique. It was found that MOF-199 acts as a combustion catalyst and a safety regulator, effectively accelerating the thermal decomposition of CL-20 and ensuring safety performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Bing He, Kailei Lu, Wenxin Du, Xiaolan Zhou, Xu Huang, Yanli Shi, Zhangyi Huang, Haomin Wang, Jianqi Qi, Tiecheng Lu
Summary: Mono-dispersed and high-flowable spherical AlON powders were successfully obtained in this study. Spherical pure AlON particles with a mean size of approximately 51.9 μm were prepared from a C/Al2O3 mixture through spray drying technology and a calcined step at 1750 degrees C for 0.5 h. The as-prepared spherical AlON powders showed better flowability and filling properties compared to the irregular-shaped AlON powders obtained by conventional methods. This work provides a paradigm for obtaining highly flowing spherical ceramic powders, which is important for the preparation of complex-shaped AlON ceramics.
CERAMICS INTERNATIONAL
(2023)
Article
Chemistry, Physical
Lele Wang, Yuzhi Jiao, Zhijun Qiao, Jun Qin, Yuzuo Wang, Dianbo Ruan
Summary: The spray drying method combined with solid-state calcination was used to prepare Li4Ti5O12 @LiAlO2 (LTO@LAO) composite anode electrode materials with micro and nano spherical structures. The LTO@LAO composite exhibited excellent specific capacity, rate capability, and cycling stability, making it an excellent candidate for high-power devices and energy storage systems.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Multidisciplinary
Jun Zhou, Yuying Zheng, Dongyang Chen
Summary: By using a reduction-reaction-induced self-assembly process, a new type of three-dimensional porous aerogel with partially unzipped multiwalled carbon nanotubes inserted into graphene nanosheets was prepared. The aerogels exhibited excellent electrical contact, prevented restacking of graphene nanosheets, and provided large channels for charge transfer, resulting in promising electrode materials for supercapacitor applications.
Article
Nanoscience & Nanotechnology
Herbert Canziani, Frederik Bever, Alexander Sommereyns, Michael Schmidt, Nicolas Vogel
Summary: The study demonstrates a process of designing polymer and composite supraparticle powders with excellent flowability and tailored composition. By assembling powders from the bottom up and selecting suitable colloidal primary particles, precise control over surface roughness and internal morphology can be achieved. These prepared powders have optimized flowability and can be used in powder bed additive manufacturing for producing various structures.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Guozhen Zhu, Wenling Jiao, Qing Li, Yunhao Zhao, Xianhu Liu, Renchao Che
Summary: A hierarchical conductive optimization strategy was proposed to improve the rate capability of traditional TNO electrodes by fabricating highly conductive porous TNO@C/CNTs microsphere. The attached carbon materials on the TNO-based electrode significantly enhanced the conductivity and cyclic durability, leading to improved performances of LIBs.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Nanoscience & Nanotechnology
Yu-Jin Lee, Junyoung Cha, Yeonsu Kwak, Yongha Park, Young Suk Jo, Hyangsoo Jeong, Hyuntae Sohn, Chang Won Yoon, Yongmin Kim, Kwang-Bum Kim, Suk Woo Nam
Summary: A highly active and stable nickel-based structured catalyst for ammonia dehydrogenation was developed through low-temperature chemical alloying and selective aluminum dealloying. The catalyst demonstrated unprecedented activity levels and outstanding stability at 600°C, significantly outperforming previous Ni-based catalysts.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Jae-Ik Hyun, Kyeongho Kong, Songgue Choi, Minyoung Na, Kwang Bum Kim, Won Tae Kim, Do Hyang Kim
Summary: A scalable method was developed to synthesize nanoporous Si using Al-Si-Ni amorphous precursor alloys, with controlled pore and ligament sizes. The Ni-coated nanoporous Si showed high initial coulombic efficiency and high reversible capacity after 500 cycles, indicating its potential as a novel strategy for next-generation LIBs.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Mahboobeh Nazarian-Samani, Masoud Nazarian-Samani, Safa Haghighat-Shishavan, Kwang-Bum Kim
Summary: The study explores ternary copper phosphosilicide (Cu4SiP8) as a promising anode material for Li-ion and Na-ion batteries for the first time. By utilizing a hybrid architecture, the electrode effectively addresses volume changes and reaction pathways, demonstrating outstanding performance.
Article
Chemistry, Physical
Mahboobeh Nazarian-Samani, Masoud Nazarian-Samani, Safa Haghighat-Shishavan, Kwang-Bum Kim
Summary: The introduction of Si,P-vacancy-rich cobalt phospho-silicide (CoSi3P3) as a representative material for ternary MSixPy alloys, along with a vacancy-generating strategy, improves the cycling performance of P and Si-rich anodes in Li-ion batteries. The composite with modulated defects and electronic properties exhibits superior Li storage performance.
ENERGY STORAGE MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Young Hwan Kim, Geon-Woo Lee, Yeon Jun Choi, Kwang-Bum Kim
Summary: This study reports the in situ growth of novel graphene nanostructures in reduced graphene oxide microspherical assembly for electrochemical energy storage. The graphene microspheres showed high gravimetric and volumetric capacitances, excellent rate capabilities, and cycling stability, making them promising materials for energy storage applications.
Article
Electrochemistry
Seo Hui Kang, Jun Hui Jeong, Ji Su Chae, Yun Chan Kang, Kwang Chul Roh
Summary: The optimized electrochemical performance of a hybrid supercapacitor constructed with CAC and LTO/CNT improved capacitance and rate capability due to optimized surface area, pore structure, and electronic conductivity. This hybrid supercapacitor showed promising maximum energy and power densities, as well as good cycle-life performance, indicating potential for expanding supercapacitor applications.
Article
Chemistry, Physical
Safa Haghighat-Shishavan, Masoud Nazarian-Samani, Mahboobeh Nazarian-Samani, K. -B. Kim
Summary: Emerging electrode materials for next generation batteries are consciously designed to contain multi-component active materials. Bismuth phosphorus tetrachalcogenide (BiPS4) is introduced as an excellent anode for potassium-ion batteries, which exhibits a tunnel structure for exceptional ion/electron pathways and mechanical integrity. Rational construction of BiPS4-carbon nanotube hybrid and electrolyte modification successfully improve battery performance by hindering detrimental phenomena.
ENERGY STORAGE MATERIALS
(2021)
Article
Engineering, Environmental
Geon-Woo Lee, Yeon Jun Choi, Young Hwan Kim, Byung Hun Park, Song-Gue Choi, Masoud Nazarian-Samani, Kwang-Bum Kim
Summary: Chemical interaction with carbon can induce amorphization in layered structured GeSe, leading to improved electrochemical properties for K-ion batteries. This study provides new insights on the role of chemical interaction in reversible conversion reactions of anode materials, indicating potential for application in advanced secondary batteries.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Chemistry, Physical
Ju-Won Lee, Kwon-Hyung Lee, Seong-Sun Lee, David B. Ahn, Jinyoung Chun, Seo Hui Kang, Kwang Chul Roh, Sang-Young Lee
Summary: We have developed on-demand solid-state microsupercapacitors (MSCs) with ultrahigh energy density using direct-ink-writing (DIW) printing technology. These MSCs have microscale features, arbitrary form factors, and ionic isolation between unit cells, allowing electrochemical tailoring of voltages and capacitances. The resulting MSCs exhibit high energy density and artistic versatility.
ENERGY STORAGE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Geon Hae Lim, Jae-Won Lee, Jun-Ho Choi, Yun Chan Kang, Kwang Chul Roh
Summary: Lignin, a key structural material in plant support tissues, is currently only commercially utilized at a rate of 2%, with the remainder being burned as fuel. This study investigated the conversion of larch and lignin into activated carbon samples for supercapacitors. The lignin-derived activated carbon samples exhibited high gravimetric specific capacitance, good cycling stability, and eco-friendly properties.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Nanoscience & Nanotechnology
Jeong Han Lee, Young Lok Cha, Yong-Mook Kang, Kwang Chul Roh
Summary: This study investigates the reaction mechanism of residual alkali during the alkaline hydrothermal separation of cellulose, and demonstrates the formation of activated carbon with a high surface area through the activation process, which shows great potential for application in supercapacitors.
Review
Chemistry, Physical
Hae Woong Park, Kwang Chul Roh
Summary: This review summarizes the application of pseudocapacitive materials as electrode materials for supercapacitors in energy-storage systems. The origin, historical development, and basic principles of pseudocapacitive materials are first summarized, followed by synthesis strategies to improve their electrochemical performance. The latest advances in advanced electrode materials with high-energy densities are then highlighted, and the major challenges and prospective directions for developing pseudocapacitive materials for supercapacitors are discussed.
JOURNAL OF POWER SOURCES
(2023)
Article
Electrochemistry
Min O. Ju, Jun Hui Jeong, Jong Hyeok Park, Hyo-Jun Ahn, Kwang Chul Roh
Summary: This study successfully introduces black phosphorus into lithium-ion capacitors and addresses its poor rate capability and cycling stability issues. By improving electrical conductivity and mitigating volume expansion, the black phosphorus-based composite exhibits high capacities and good cycling stability.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Multidisciplinary
Woonbae Sohn, Taemin Ludvic Kim, Tae Hyung Lee, Sangmoon Yoon, Chungsoo Kim, Jung-Woo Yoo, Kwang Chul Roh, Miyoung Kim, Ho Won Jang
Summary: This study demonstrates how the formation of a two-dimensional electron gas (2DEG) at the LaAlO3 (LAO)/SrTiO3 (STO) interface can be manipulated by controlling the octahedral tilt of perovskite oxides through interface engineering.
Article
Materials Science, Multidisciplinary
Masoud Nazarian-Samani, Safa Haghighat-Shishavan, Mahboobeh Nazarian-Samani, Seyed Farshid Kashani-Bozorg, Seeram Ramakrishna, Kwang-Bum Kim
Summary: This article summarizes the research interest and superior properties of nanoperforated graphene in the past decade, focusing on the characterization and synthesis of 2D holey nanostructures under different chemistry-based strategies, as well as their applications and performance optimization in next-generation batteries.
PROGRESS IN MATERIALS SCIENCE
(2021)
