Article
Polymer Science
Duy Linh Vu, Chau Duy Le, Kyoung Kwan Ahn
Summary: A liquid-solid triboelectric nanogenerator (TENG) using polyvinylidene fluoride surface polarization enhancement (PSPE) is proposed for self-powered streamflow sensing. The TENG has high output and can simultaneously monitor multiple parameters of the streamflow with minimal error detection.
Article
Materials Science, Multidisciplinary
Sathiyanathan Ponnan, Thomas Walter Schmidt, Tianyuan Li, Harini Bhuvaneswari Gunasekaran, Xixian Ke, Yajing Huang, Suhail Mubarak, Arun Anand Prabu, Zixiang Weng, Lixin Wu
Summary: Magnesiochromite nanocrystalline powder (MgCr2O4) was successfully synthesized using an eggshell membrane as a template, and a robust piezoelectric nanogenerator using PVDF-MgCr2O4 nanofiber was fabricated with enhanced ferroelectric and piezoelectric characteristics. The nanogenerator showed good output voltage and power density in experiments, suitable for energy harvesting from human tapping motions.
ACS APPLIED POLYMER MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Sk Shamim Hasan Abir, Muhtasim Ul Karim Sadaf, Sunanda Kumar Saha, Ahmed Touhami, Karen Lozano, Mohammed Jasim Uddin
Summary: In this study, a flexible and stretchable triboelectric nanogenerator (TENG) based on nanofibers was demonstrated for energy harvesting and biomechanical sensing applications. The TENG showed high output efficiency and the ability to light up LED lights, as well as potential for use as a cost-effective self-powered flexible body motion sensor based on responses to different frequencies of biomechanical movements.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Polymer Science
Ramadasu Gunasekhar, Ponnan Sathiyanathan, Mohammad Shamim Reza, Gajula Prasad, Arun Anand Prabu, Hongdoo Kim
Summary: In this study, PVDF-based triboelectric nanogenerators (TENGs) were prepared by adding aromatic hyperbranched polyester (Ar.HBP-3) as a filler. The PVDF-Ar.HBP-3/PU-based TENG showed better triboelectric performance than a PVDF/PU pair. Among the different wt.% of Ar.HBP-3, the sample with 10 wt.% exhibited the highest output performance with an open-circuit voltage of 107 V, which is 10 times higher than that of neat PVDF. Additionally, the TENG was effective in measuring human motion. This study presents a simpler technique for producing high-performance TENGs using PVDF morphological alteration, which has great potential for mechanical energy harvesting and powering wearable and portable electronic devices.
Article
Engineering, Manufacturing
Hua Yu, Yan Shao, Chen Luo, Yan Li, Hong-zhi Ma, Yu-hao Zhang, Bo Yin, Jia-bin Shen, Ming-bo Yang
Summary: A simple and effective method was used to improve bacteria cellulose (BC) based TENG by enhancing the dielectric constant and surface structure of the material, resulting in improved output performance.
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
(2021)
Article
Chemistry, Physical
Na Sun, Gui-Gen Wang, Hai-Xu Zhao, Ya-Wei Cai, Jia-Ze Li, Gui-Zhong Li, Xiao-Nan Zhang, Bao-Lin Wang, Jie-Cai Han, Yuanhao Wang, Ya Yang
Summary: This study presented a wearable electronic device made of nanofiber-based triboelectric nanogenerator that is waterproof, breathable, and comfortable. By utilizing the coupling effect between nano-net structure and porous structure, the effective contact area was effectively enhanced, resulting in improved electrical performance and washable characteristics.
Article
Engineering, Environmental
Sang-Hyun Sohn, Geon-Ju Choi, Il-Kyu Park
Summary: Metal-organic frameworks (MOFs) can enhance the performance of triboelectric nanogenerator (TENG) by utilizing their unique properties, such as the self-cleaning effect (SPE). Composite nanofibers based on MOFs and polyvinylidene fluoride (PVDF) show improved TENG output performance and can be used as self-powered triggering sensors.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Zhao Sha, Cyrille Boyer, Guang Li, Yuyan Yu, Francois-Marie Allioux, Kourosh Kalantar-Zadeh, Chun-Hui Wang, Jin Zhang
Summary: A technique for introducing liquid metal Galinstan nanodroplets into electrospun PVDF-co-HFP nanofibers was proposed to enhance the triboelectric performance of TENGs, resulting in significantly improved electrical outputs. The LM modified PVDF-HFP nanofiber membranes showed the highest multifunctionality efficiency in terms of mechanical performance and electrical generation.
Article
Chemistry, Physical
Wenjian Li, Liqiang Lu, Feng Yan, George Palasantzas, Katja Loos, Yutao Pei
Summary: This study utilizes fragile and rigid mica to improve the performance of triboelectric nanogenerators (TENGs). By exfoliating mica into 2D nanosheets and electrospinning them into flexible thermoplastic polyurethane (TPU) nanofibers, the transferred charge of the TENG significantly increases. The mica also enhances the positive electrostatic surface potential (ESP) of TPU, leading to a higher power density in the TENG.
Article
Chemistry, Multidisciplinary
R. Eslami, A. Malekkhouyan, P. Santhirakumaran, M. Mehrvar, H. Zarrin
Summary: Flexible piezoelectric nanogenerators (PENGs) incorporating functionalized mono-/few-layered hexagonal boron nitride nanosheets (F-hBNNS) in a polyvinylidene fluoride (PVDF) matrix were fabricated for clean energy harvesting and powering low-power modules. The F-hBNNS showed enhanced piezoelectric properties compared to non-functionalized hBN, resulting in a 5.5 times increase in energy harvesting performance. The PENGs exhibited stable voltage output even after 1000 cycles of bending-unbending, making them compatible with wearable devices.
MATERIALS TODAY CHEMISTRY
(2023)
Article
Chemistry, Multidisciplinary
Deepika Thakur, Soonmin Seo, Jinho Hyun
Summary: Here is a description of the fabrication process of a compact, flexible and lightweight 3D triboelectric nanogenerator (TENG) using carboxymethylated cellulose nanofiber (CM-CNF) and perfluoroalkoxy (PFA) films. The output performance of the TENG is dependent on the functionalization of the CM-CNF film, loading force, and frequencies. The carboxymethylation of the cellulose nanofiber directly enhances the output voltage and current of the CM-CNF/PFA TENG, which can generate a maximum power output of 2000 lW under specific conditions.
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
(2023)
Article
Chemistry, Physical
Shimna Shafeek, Neethu T. M. Balakrishnan, Bushara Fatma, Ashish Garg, M. J. Jabeen Fatima, Danny Morton, Jikui Luo, Prasanth Raghavan
Summary: This research conducts a comprehensive analysis on a novel nanocomposite of polyvinylidene fluoride (PVDF)/silicon car-bide (SiC) nanoparticles as a triboelectric material, and fabricates triboelectric nanogenerators (TENG) using the SiC-PVDF nanocomposite and polyamide (PA6) membrane combination. The results show that the inclusion of SiC nanoparticles greatly enhances the beta-phase content of the PVDF films and increases surface roughness and porosity of the SiC-PVDF nano-composites. The TENG made with a PVDF film with 6 wt% of SiC exhibits high-power output, which is four times higher than that of the TENG using the film prepared using the solution casting method.
Article
Chemistry, Multidisciplinary
Huiyuan Wu, Jian Wang, Wencong He, Chuncai Shan, Shaoke Fu, Gui Li, Qionghua Zhao, Wenlin Liu, Chenguo Hu
Summary: Charge density is crucial for evaluating the output performance of a TENG. The CE strategy is a preferred method for boosting charge density, but it can lead to air breakdown. Understanding the physical behaviors behind air breakdown is essential for achieving higher charge density using the CE strategy.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Multidisciplinary Sciences
Chaojie Chen, Shilong Zhao, Caofeng Pan, Yunlong Zi, Fangcheng Wang, Cheng Yang, Zhong Lin Wang
Summary: A simple and effective method is proposed to quantitatively identify and extract the piezoelectric charge from hybrid signals, elucidating the true performance of piezoelectric devices.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Aditi Sahoo, Tufan Paul, Ankan Nath, Soumen Maiti, Prabhat Kumar, Prasenjit Ghosh, Rupak Banerjee
Summary: Lead-free halide perovskites, such as Cs3Bi2Br9, have become popular in photovoltaic and energy harvesting applications due to their excellent optical and electrical properties and minimal toxicity. In this study, we synthesized composite films of Cs3Bi2Br9 perovskite embedded in the PVDF matrix and investigated their piezoelectric energy harvesting capabilities. The composite film with 4 wt% perovskite showed the highest activation of the electroactive β-phase of PVDF, as well as the best energy storage density and output voltage when used in a nanogenerator.
Article
Chemistry, Physical
J. Zamora, T. Bautista, N. S. Portillo-Velez, A. Reyes-Montero, H. Pfeiffer, F. Sanchez-Ochoa, H. A. Lara-Garcia
Summary: Experimental and DFT studies were conducted on the structural, magnetic, and optical properties of RFeO3 perovskites. The perovskites exhibited an orthorhombic crystal structure and weak ferromagnetic behavior. They were confirmed to be semiconductors with a bandgap of approximately 2.1 eV.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xianxiang Lv, Jing Jin, Weiguang Yang
Summary: By depositing TiN and TiO2 surface layers on AlSi films, the electrochemical performance of silicon-based anodes can be significantly improved, suppressing volume expansion and promoting the formation of a stable SEI layer.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Sharafat Ali, Haider Ali, Syedul Hasnain Bakhtiar, Sajjad Ali, Muhammad Zahid, Ahmed Ismail, Pir Muhammad Ismail, Amir Zada, Imran Khan, Huahai Shen, Rizwan Ullah, Habib Khan, Mohamed Bououdina, Xiaoqiang Wu, Fazal Raziq, Liang Qiao
Summary: The construction and optimization of redox-heterojunctions using a bifunctional phosphate as an electron-bridge demonstrated significant improvements in photo catalytic activity, including enhanced dispersion, reduced interfacial migration resistance, and increased abundance of active-sites.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ren-Ni Luan, Na Xu, Chao-Ran Li, Zhi-Jie Zhang, Yu-Sheng Zhang, Jun Nan, Shu-Tao Wang, Yong-Ming Chai, Bin Dong
Summary: Extensive research has revealed that oxygen evolution reaction (OER) in alkaline conditions involves dynamic surface restructuring. The development and design of sulfide/oxide pre-catalysts can reasonably adjust the composition and structure after surface reconstruction, which is crucial for OER. This study utilized a simple two-step hydrothermal method to achieve in situ S leaching and doping, inducing the composition change and structure reconstruction of CoFe oxides. The transformed FeOOH and CoOOH exhibited excellent OER activity and could be easily mass-produced using low-cost iron based materials and simple methods.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jun'an Lai, Daofu Wu, Peng He, Kang An, Yijia Wang, Peng Feng, WeiWei Chen, Zixian Wang, Linfeng Guo, Xiaosheng Tang
Summary: Zero-dimensional organic-inorganic metal halides (OMHs) are gaining attention in the fabrication of light-emitting diodes due to their broad emission band and high photoluminescence quantum yield. This work synthesized a zero-dimensional organic tetraphenylphosphonium bismuth chloride (TBC) that showed efficient blue light emission, with the emission mechanism attributed to the transition of Bi3+ ions. White light-emitting diodes (WLEDs) were fabricated using TBC, along with green-emitting and red-emitting single crystals, achieving single-component white emissions. These findings demonstrate the different emission mechanism of ns2 ions-based OMHs and highlight the potential of bismuth-based OMHs in WLEDs applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xuewei Liang, Yunhai Su, Taisen Yang, Zhiyong Dai, Yingdi Wang, Xingping Yong
Summary: The revolutionary design concept of high-entropy alloys has brought new opportunities and challenges to the development of advanced metal materials. In this work, AlCrCuFe2NiTix high-entropy flux cored wires were prepared by combining the design idea of a high-entropy alloy with the characteristics of flux cored wire. AlCr-CuFe2NiTix high-entropy surfacing alloys were prepared using gas metal arc welding technology. The wear properties of the alloys were analyzed, and the phase composition, microstructure, strengthening mechanism, and wear mechanism were discussed. The results show that the alloys exhibit a dendritic microstructure with BCC/B2 + FCC phases. Increasing Ti content leads to the precipitation of Laves phase. The alloys show improved microhardness and wear resistance due to the precipitation of coherent B2 and Laves phases. However, excessive Ti addition results in the increase of Laves phase and reduced wear resistance of the alloys.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
M. Vadivel, M. Senthil Pandian, P. Ramasamy, Qiang Jing, Bo Liu
Summary: This work presents the enhanced photocatalytic and electrochemical performance of g-C3N4 assisted PAA on CoFe2O4 ternary nanocomposites. The incorporation of PAA and g-C3N4 improves the separation efficiency of photogenerated charge carriers, resulting in superior photocatalytic degradation and high specific capacitance values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Vibhu T. Sivanandan, Ramany Revathy, Arun S. Prasad
Summary: In this study, pure and doped cobalt ferrite nanoparticles were prepared using the sol-gel auto-combustion method with the aid of lemon juice as eco-fuel. The crystal structure, lattice parameter, crystallite size, microstrain, optical parameters, and room temperature magnetic properties of the samples were analyzed. The effect of doping on the magnetic properties was also investigated.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qing Guo, Bowen Zhang, Benzhe Sun, Yang Qi
Summary: This study prepared ZnO films with various nonpolar preferred orientations using conventional chemical bath deposition method and characterized their growth process and mechanism. It was found that the type and concentration of nitrate could control the preferred orientation and surface roughness of ZnO films. Additionally, ZnO films with different preferred orientations exhibited different optical properties.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Chong Zhang, Yan Liu, Zhaoyan Wang, Hang Yang
Summary: In this study, six bimetallic FeCo particles were synthesized via the hydrothermal method at different Fe:Co ratios. The Fe:Co ratio not only modulates the composition of the particles but also influences their structure and magnetic properties. The FeCo alloys showed a transformation from an Fe-based structure to a Co-based structure with increasing Co content. The Fe:Co ratio of 1:1 and 3:1 resulted in particles with the highest and lowest saturation magnetization, respectively.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Jianning Zhang, Jing Li, Yiren Wang, Xiaodong Mao, Yong Jiang
Summary: We conducted a study on the formation of ultra-fine Y-Ti-Ta-O nano-oxides in Ta+B micro-alloyed 13CrWTi-ODS alloys using electron microscopy and first-principles calculations. The Y-Ti-Ta-O nano-oxides were found to be mainly Y2(Ti,Ta)2O7, with an average size of 7 nm and a number density of 6.8 x 1023 m-3. Excess boron was found to enhance the adhesion of some low-sigma grain boundaries but weaken the Fe/Y2Ti2O7 interface, while excess tantalum enhanced the Fe/Y2Ti2O7 interface but caused serious degradation of grain boundaries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Yirong Fang, Pei Cheng, Hang Yuan, Hao Zhao, Lishu Zhang
Summary: A new composite system of nitrogen-doped reduced graphene oxide and black phosphorus quantum dots has been developed for tumor therapy, showing improved electrochemical properties and stability. The system generates hydrogen peroxide and hydroxyl radical to effectively kill tumor cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Xiufang Qin, Yuanli Ma, Hui Zhang, Ting Zhang, Fang Wang, Xiaohong Xu
Summary: The structure and magnetism of cobalt ferrites after Mn2+-Tb3+ co-doping were studied. Co-doped samples exhibited cubic spinel structure and spherical shape of ferrite nanoparticles. The redistribution of Co2+ and Fe3+ ions between octahedral and tetrahedral sites was observed due to Mn2+-Tb3+ co-doping. The coercivity and magnetization saturation of co-doped samples were significantly improved, leading to a maximum energy product that is 190% higher than that of the un-doped sample.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Ho Yeon Lee, Wonjong Yu, Yoon Ho Lee
Summary: Recently, there has been an increasing interest in developing ultra-fine nanostructured electrodes with extensive reaction areas to enhance the performance and low-temperature operation of solid oxide fuel cells. The use of a refined approach involving co-sputtering metal alloys and oxide targets has demonstrated the feasibility of nano-columnar structures in perovskite-based electrodes, expanding the temperature range of thin film electrodes. This study systematically examines the effects of chamber pressure control in the co-sputtering process and identifies the intricate relationship between sputtering pressure and film structure. By fine-tuning the columnar growth in the electrode, significant improvements in performance and thermo-mechanical properties were achieved, resulting in high-performance all-sputtered solid oxide fuel cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)
Article
Chemistry, Physical
Qianyun Bai, Xiaoxiao Yan, Da Liu, Kang Xiang, Xin Tu, Yanhui Guo, Renbing Wu
Summary: This study proposes a simple method to develop a non-precious transition metal-based electrocatalyst with high catalytic activity and robustness for the hydrogen evolution reaction. The as-synthesized electrode exhibits a low overpotential and high current density, indicating its potential in energy conversion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2024)