Article
Energy & Fuels
Rafael Vicentini, Willian G. Nunes, Lenon H. da Costa, Leonardo M. Da Silva, Bruno Freitas, Aline M. Pascon, Otavio Vilas-Boas, Hudson Zanin
Summary: A novel multi-walled carbon nanotubes and activated carbon composite material was reported as an electrode for electrochemical capacitors, showing low equivalent series resistance and operational stability in aqueous electrolytes. The simple, fast, and low-cost approach resulted in devices with high voltage and specific capacitance, demonstrating good cyclability and potential for environmentally friendly electrolytes.
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
Chemistry, Multidisciplinary
Peng Lv, Yeyun Meng, Lingxia Song, Hao Pang, Weiqu Liu
Summary: A self-supported electrode based on nanocellulose fibers, multi-walled carbon nanotubes, and polypyrrole was successfully prepared and studied for its feasibility as an electrode for supercapacitors. The ternary composite exhibited a large specific capacitance and excellent cycling stability, making it a promising candidate for high-performance electrodes in supercapacitors.
Article
Chemistry, Analytical
Wenhao Peng, Ningning Song, Zilong Su, Jiajun Wang, Kaixuan Chen, Shuji Li, Bingyan Wei, Shiping Luo, Aijuan Xie
Summary: A series of MoS2 and Mn metal organic frameworks (Mn-MOF) were synthesized, and then mixed with multi-walled carbon nanotubes (MWCNT) in different mass ratios to be applied for supercapacitors. The best electrochemical performance was achieved when the mass ratio of MoS2:Mn-MOF:MWCNT was 1:4:1.
MICROCHEMICAL JOURNAL
(2022)
Article
Engineering, Environmental
Yang Li, Cai-Yan Gao, Xin-Heng Fan, Lian-Ming Yang
Summary: This study developed a high-performance polypyrrole (PPy)/single-walled carbon nanotube (SWCNT) composite material through in-situ electrochemical polymerization of pyrrole on a pre-fabricated SWCNT membrane electrode. By adopting pulse galvanostatic electropolymerization (PGEP) technology for interface engineering, the TE performance of the composite film was significantly improved, achieving excellent power factor and figure of merit.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Electrochemistry
Wenyu Liang, Igor Zhitomirsky
Summary: This study proposes an asymmetric supercapacitor device operating in a neutral electrolyte with a voltage window of 1.7 V. MXene-PPy composites are used as the negative electrode, and high capacitance is achieved through optimization of composition and performance. A new strategy for in-situ PPy polymerization on the MXene surface is employed, enhancing the negative electrode performance.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Multidisciplinary
Songjie Wang, Yongyin Liang, Wenchen Zhuo, Hang Lei, Muhammad Sufyan Javed, Botian Liu, Zilong Wang, Wenjie Mai
Summary: A high mass loading and freestanding CNT@PPy electrode was fabricated, demonstrating superior areal capacitance and improved mechanical properties, leading to enhanced performance for supercapacitors.
MATERIALS CHEMISTRY FRONTIERS
(2021)
Article
Polymer Science
Alaa Attar, Rima D. Alharthy, Mohammed Zwawi, Mohammed Algarni, Faisal Albatati, Mohamed Bassyouni, Mohamed Helmy Abdel-Aziz, Mohamed Shafick Zoromba, Ahmed F. Al-Hossainy
Summary: Polypyrrole/multiwalled carbon nanotube composites were produced using an in situ oxidative polymerization method, and their morphology, structural, and electrical characteristics were examined. The composites showed promising results for potential applications in polymer solar cells.
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
Electrochemistry
Mansoor Farbod, Elham Elahi Asl, Seyyedeh Saadat Shojaeenezhad
Summary: The size of polypyrrole (PPy) particles can be adjusted by adding carbon nanotubes (CNTs) with different weight percentages. Increasing the weight percentage of CNTs reduces the size of PPy particles. However, increasing the reflux time of CNTs leads to an increase in the size of PPy particles. Electrochemical measurements show that the specific capacity of supercapacitors decreases with increasing reflux time of CNTs in the nanocomposite.
JOURNAL OF APPLIED ELECTROCHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Evgeny Senokos, David B. Anthony, Noelia Rubio, Maria Crespo Ribadeneyra, Emile S. Greenhalgh, Milo S. P. Shaffer
Summary: Multifunctional electrodes for structural supercapacitors were prepared by infiltrating single-walled carbon nanotubes (SWCNTs) into woven carbon fibers (CFs) using a vacuum method. The use of reductive charging chemistry ensured a high degree of individualization. The resulting electrodes showed high conductivity, surface area, and electrochemical performance, and significantly improved the electrical conductivity, surface area, and in-plane shear properties of the CF fabrics. Structural supercapacitors based on these electrodes exhibited high specific energy and power densities in the chosen electrolyte. This approach provides a new route to structural energy storage systems.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Energy & Fuels
Yasar Ozkan Yesilbag, Fatma Nur Tuzluca Yesilbag, Ahmad Huseyin, Mehmet Ertugrul
Summary: This study investigated the specific capacitance, energy density, and cyclic stability of a composite electrode structure consisting of vertically aligned BCN nanotubes coated with WS2. The results showed excellent cyclic stability and good capacitance retention for the electrode structure.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Paper & Wood
Yang Zhan, Yang Hu, Yu Chen, Quanling Yang, Zhuqun Shi, Chuanxi Xiong
Summary: Nanocellulose has become one of the most attractive matrix materials for flexible supercapacitors, and electrode materials with high capacitance and mechanical flexibility were developed through the in-situ synthesis of polypyrrole. The resulting nanocellulose/carbon nanotube/polypyrrole hydrogels showed promising performance in the field of flexible solid-state supercapacitors.
Article
Materials Science, Multidisciplinary
Yaqi Chen, Lifen Tong, Guo Lin, Xiaobo Liu
Summary: In this study, SWCNTs/phthalocyanine polymer composite derived self-nitrogen-doped graphene-like porous carbon (SPCM) was synthesized through a simple solution blending and mechanical stirring method. The SPCM showed high specific capacitance and excellent stability as an electrode material for supercapacitors.
MATERIALS CHEMISTRY AND PHYSICS
(2022)
Article
Chemistry, Multidisciplinary
Dhanapal Thillaikkarasi, Srinivasan Karthikeyan, Rajendran Ramesh, Prabhu Sengodan, Dhamodaran Kavitha, Malarvizhi Muthubalasubramanian
Summary: An electrical double-layer capacitor was fabricated using biomass-derived materials and the performance of different electrode compositions was studied. The AC-MWCNTs (25:75) symmetric supercapacitor showed excellent electrochemical performance in 0.5 M Na2SO4.
Article
Engineering, Manufacturing
Pan Wang, Min Hao Goh, Qiang Li, Mui Ling Sharon Nai, Jun Wei
VIRTUAL AND PHYSICAL PROTOTYPING
(2020)
Article
Materials Science, Multidisciplinary
Qiang Li, Hao Sun, Junjie Li, Xufeng Yuan, Masaaki Nakai, Mitsuo Niinomi, Takayoshi Nakano
Summary: The study shows that increasing sintering temperature enhances the strength and plasticity of the alloy, while higher Fe content can promote the formation of beta phase grains and solid-solution strengthening effect. However, excessive Fe can lead to the formation of intermetallic compounds, affecting the mechanical properties. The mechanical properties of the alloy are influenced by a combination of factors.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2021)
Article
Chemistry, Physical
Kyu Hwan Choi, Xuyan Liu, Xiaohong Ding, Yijie Xia, Qiang Li
Summary: The study investigates the use of polyethylenimine (PEI) polymer to synthesize NCM811 cathodes for improving particle structural stability and controlling electrode pore conditions. However, cross-linking between PEI and polyvinylidene fluoride (PVdF) accelerates gelation, leading to complete structural changes and collapse in the cathode.
Article
Materials Science, Multidisciplinary
Qiang Li, Jinshuai Yang, Junjie Li, Ran Zhang, Masaaki Nakai, Mitsuo Niinomi, Takayoshi Nakano
Summary: Cu-doped amorphous calcium phosphate (ACP) coatings were fabricated on pure titanium surfaces by electrochemical deposition at initial electrolyte temperatures of 35, 45, and 55 °C. The Cu concentration on the surfaces of the samples increased from 6.90 to 15.05 mass% as the initial electrolyte temperature increased. The Cu-doped ACP coatings showed strong antibacterial activity, completely inhibiting the growth of Escherichia coli.
MATERIALS TRANSACTIONS
(2021)
Article
Materials Science, Multidisciplinary
Qiang Li, Fei Li, Junjie Li, Zhi Gao, Ke Zhang, Mitsuo Niinomi, Takayoshi Nakano
Summary: By replacing Nb with Cr, the stability and comprehensive mechanical properties of beta-type Ti-Nb-Cr alloys can be improved without causing cytotoxicity.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2022)
Article
Materials Science, Multidisciplinary
Qiang Li, Tengfei Liu, Junjie Li, Chao Cheng, Mitsuo Niinomi, Kenta Yamanaka, Akihiko Chiba, Takayoshi Nakano
Summary: The addition of Sn was found to affect the beta phase stability, plasticity, and work-hardening rate of Ti-Nb-Fe alloys, without showing a strong solid solution strengthening effect. Ti-26Nb-2Fe-4Sn alloy demonstrated good mechanical properties and cell viability, making it suitable for biomaterials.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Junjie Li, Zan Lian, Qiang Li, Zhongchang Wang, Lifeng Liu, Francis Leonard Deepak, Yanping Liu, Bo Li, Junyuan Xu, Zuxin Chen
Summary: In this study, a high-performance nanoporous Ir_xRu_1-xO_2 catalyst with high activity and acid stability was successfully fabricated. The catalyst exhibits excellent electrocatalytic performance under acidic conditions and can sustain long-term oxygen evolution reaction, showing great potential for large-scale practical applications.
Article
Metallurgy & Metallurgical Engineering
Qiang Li, Qi Huang, Jun-jie Li, Qian-feng He, Masaaki Nakai, Ke Zhang, Mitsuo Niinomi, Kenta Yamanaka, Akihiko Chiba, Takayoshi Nakano
Summary: In this study, Zr was added to develop low elastic modulus and high strength beta-Ti alloys for biomedical applications. The results showed that Zr and Fe had a significant solid-solution strengthening effect on the alloys, resulting in high yield and ultimate tensile strengths. Additionally, twinning in the deformed alloys contributed to both strength and plasticity.
TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
(2022)
Article
Materials Science, Multidisciplinary
Qiang Li, Shihong Song, Junjie Li, Jinshuai Yang, Ran Zhang, Mitsuo Niinomi, Takayoshi Nakano
Summary: This study explores the effect of copper content in a copper-doped hydroxyapatite coating (CuHAp) on its antibacterial activity and biocompatibility. The results show that the coating with a copper content of 1.57% exhibits excellent biocompatibility and antibacterial properties. However, when the copper content increases to 6.85%, the coating becomes cytotoxic.
MATERIALS TRANSACTIONS
(2022)
Article
Engineering, Electrical & Electronic
Shasha Lu, Qiang Li
Summary: This study investigated the effect of band gap on the device performance of tin-based perovskite solar cells using a simulator. The results showed that the open-circuit voltage increased with the increase of band gap, while other performance parameters tended to decrease. The internal mechanisms affecting each parameter were analyzed, and it was verified that the band gap can be tuned by doping to achieve stability.
OPTICAL AND QUANTUM ELECTRONICS
(2022)
Article
Chemistry, Physical
Xuyan Liu, Ruipeng Zhao, Yijie Xia, Qiang Li
Summary: LFP/C composites prepared through carbothermic reduction process show enhanced electrochemical performance with increasing carbon content. LFP/C-15 exhibits the highest initial discharge specific capacity and superior capacity retention rate, close to the theoretical specific capacity.
Article
Engineering, Electrical & Electronic
Xuyan Liu, Wenhui Chen, Yijie Xia, Qiang Li
Summary: In this study, SiO2/Si/PAN composites were prepared as active anode for LIBs using template method and liquid-phase mixing. The addition of binary conductive agents of rGO and MWCNTs at 1:1 mass ratio greatly improved the performance of LIBs.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Multidisciplinary
Jiawei Yang, Qiang Li, Junjie Li, Jinshuai Yang, Ran Zhang, Mitsuo Niinomi, Takayoshi Nakano
Summary: Cu-doped hydroxyapatite/TiO2 composite coatings were prepared using an electrochemical method, resulting in improved adhesion and antibacterial properties. These coatings showed high biocompatibility and promoted cell proliferation.
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
(2023)
Article
Nanoscience & Nanotechnology
Jiaxin Pan, Pingda Xu, Wei Li, Qiang Li, Wei Li, Fengcang Ma, Ke Zhang
Summary: A novel Ni-free V-containing lean duplex stainless steel with low content of precious element Ni and good mechanical properties was developed. The effects of annealing temperature on the precipitation behavior, austenite volume fraction, and grain size of the steel were investigated. The results showed a synergistic deformation behavior of TRIP effect in austenite and rapid growth of dislocations in coarse ferrite, resulting in excellent plasticity of the steel. Annealing at 1125°C for 5 minutes yielded samples with good combination of ultimate strength and elongation.
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
(2023)
Article
Materials Science, Multidisciplinary
Qiang Li, Yan Liu, Huanhuan Yu, Masaaki Nakai, Mitsuo Niinomi, Kenta Yamanaka, Akihiko Chiba, Takuya Ishimoto, Takayoshi Nakano
Summary: The effect of O on beta-Ti alloys with various beta phase stability was studied. Ti-xNb-0.4O (x = 30, 32, 34, 36, 38, 40, 42, mass%) alloys were prepared and their phase composition, microstructure, and mechanical properties were analyzed. O suppressed omega phase and alpha '' phase transformations, and showed a solution-strengthening effect. The Ti-xNb-0.4O alloys exhibited similar tensile strengths, with Young's moduli ranging from 60 to 69 GPa and elongations all higher than 15%. Ti-36Nb-0.4O showed desirable mechanical properties, including a Young's modulus of 61 GPa, a tensile strength of 760 MPa, and an elongation of approximately 35%.
