Article
Chemistry, Applied
Ambar Ghadage, Pavan Kodam, Digambar Nadargi, K. P. Shinde, Imtiaz Mulla, J. S. Park, Sharad Suryavanshi
Summary: We report the development of highly optimized NiCo2O4 microflowers for supercapacitor applications. By carefully tuning various parameters, such as reaction temperature, reaction time, sintering temperature, and electrolyte concentration, we obtained an electrode material with high specific capacitance, energy density, and power density. The optimized sample displayed excellent electrochemical performance and retained 97.61% of its specific capacitance after 1000 cycles. The well-optimized NiCo2O4 microflowers show great promise for future industrial applications.
JOURNAL OF POROUS MATERIALS
(2022)
Article
Chemistry, Physical
Jihyeon Park, Seungju Jo, Narasimharao Kitchamsetti, Shakir Zaman, Daewon Kim
Summary: Recently, various electroactive materials composed of binary transition metal oxides and conducting polymers have been extensively studied. In this study, a new nanocomposite material with well-defined surface morphology and significant synergistic effect was developed using a hydrothermal method. The nanocomposite showed high performance in battery-type electrodes.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Poonam R. Kharangarh, Nuggehalli M. Ravindra, Rachna Rawal, Amrita Singh, Vinay Gupta
Summary: In this study, NiCo2O4/GQDs composite structures were prepared with improved electrical conductivity to serve as electrode materials with higher energy density. The specific capacitance of the composite was found to be higher than that of Graphene Quantum Dots, attributed to enhanced electrical conductivity and faster ion diffusion. These findings demonstrate the suitability of the fabricated composites as superior electrode materials for supercapacitor applications.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
M. Jayachandran, S. Kishore Babu, T. Maiyalagan, M. R. Kannan, R. Goutham Kumar, Y. Sheeba Sherlin, T. Vijayakumar
Summary: This study discusses the electrochemical performance of porous Nickel oxide nanocrystals synthesized by the hydrothermal method, analyzing their structure and morphology through various techniques. The porous Nickel oxide electrode shows high specific capacitance in different aqueous electrolytes, with exceptional performance in 1M Na2SO4 solution. Additionally, the electrode exhibits good cyclic stability with 91% capacity retention over 2000 cycles, highlighting its potential for supercapacitor applications.
Article
Chemistry, Physical
Zaijun Cheng, Jianming Wang, Zhiyu Ren, Guoli Zhang, Xiaohua Huang, Lie Cai, Feibing Xiong, Gang Li
Summary: In this study, nickel copper oxide/carbon (NCO/C) fiber nanocomposites were prepared via electrospinning and calcination treatment. The NCO nanoparticles are decorated on the carbon nanofiber skeleton, which not only guides the growth of NCO nanoparticles and prevents aggregation, but also acts as a conductive network to facilitate electron transfer. The NCO/C fiber nanocomposites exhibit excellent electrochemical properties due to their generous specific surface area and excellent electrical conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
Sarita Yadav, Aditya Sharma Ghrera, Ambika Devi, Abhimanyu Rana
Summary: The fabrication of high-performance supercapacitors involves selecting suitable electrode materials, optimizing morphology, and using an efficient synthesis approach. This study utilizes a integrated synthesis approach to improve the electrochemical stability of nickel cobaltite (NiCo2O4). The resulting hierarchical flower-like NiCo2O4@TiN nanosheets grown on nickel foam exhibit high specific capacity, excellent rate capability, and cycling stability, making them suitable for the fabrication of supercapacitor devices.
ELECTROCHIMICA ACTA
(2023)
Article
Electrochemistry
Nimisha Girija, Surya Suma Kuttan, Jincy Parayangattil Jyothibasu, Rong-Ho Lee, Balagopal N. Nair, Abdul Azeez Peer Mohamed, Sudha J. Devaki, Unnikrishnan Nair Saraswathy Hareesh
Summary: This study successfully enhanced the electrochemical performance of nickel cobaltite by incorporating conductive silver nanoparticles, resulting in improved stability of the material in an alkaline medium. The hybrid supercapacitor device composed of nickel cobaltite/silver nanoparticles//activated carbon exhibited high energy density. Furthermore, the composite electrode with optimized silver loading showed increased plasmonic capacitance under UV illumination.
ELECTROCHIMICA ACTA
(2022)
Article
Chemistry, Physical
Manpreet Kaur, Prakash Chand, Hardeep Anand
Summary: This study reports the fabrication of grain-like nanostructures of NiCo2O4 using a facile Co-precipitation method, which showed high specific capacitance of 1860 F/g at a current density of 1 A/g and good cycle stability of 75% after 1500 cycles. The as-synthesized NiCo2O4 exhibited a single cubic phase with the Fd3m space group, as confirmed by XRD, FTIR, and Raman spectroscopy, and the grain-like nanostructured morphology was revealed by SEM.
CHEMICAL PHYSICS LETTERS
(2022)
Article
Chemistry, Multidisciplinary
Kai Wang, Meini Yuan, Xiaochen Cao, Congming Ding, Jian Ma, Zeyuan Wei
Summary: NiCo(OH)(4)-NiO composite electrode materials were prepared using hydrothermal deposition and electrophoretic deposition. NiCo(OH)(4) exhibits a spherical and flowerlike morphology composed of nanosheets, with NiO deposited in the form of nanorods on its surface. NiCo(OH)(4)-NiO-90 shows the maximum specific capacitance and remains 84% after 1000 charge-discharge cycles.
Article
Chemistry, Multidisciplinary
Shivraj M. Mahadik, Nilesh R. Chodankar, Young-Kyu Han, Deepak P. Dubal, Sarita Patil
Summary: This review elaborates on the recent advances in the use of nickel cobaltite (NiCo2O4) as a potential positive electrode for hybrid supercapacitors (HSCs) to achieve high energy density without sacrificing power density and cycling stability.Introduction of structural benefits, charge storage mechanisms, and composites of NiCo2O4 with various materials helps in enhancing the electrochemical performance of HSCs. Key scientific challenges and perspectives for building high-performance HSCs for future applications are also discussed.
Article
Nanoscience & Nanotechnology
Nimisha Girija, Surya Suma Kuttan, T. K. Anusree, Balagopal N. Nair, Abdul Azeez Peer Mohamed, Unnikrishnan Nair Saraswathy Hareesh
Summary: In this study, self-supported NiCo2O4-NiCoO2 sheathed architectures were successfully synthesized and demonstrated as efficient battery-type electrodes for supercapacitors. The unique design of the material resulted in enhanced electrochemical performance and durability, offering the possibility of developing high-performing electrode materials for supercapacitor applications.
ACS APPLIED NANO MATERIALS
(2022)
Article
Materials Science, Ceramics
Eun-Bi Kim, Shaheer Akhtar, M. Shaheer Akhtar, Sadia Ameen
Summary: In this study, delafossite CuCrO2 nanoparticles were synthesized and investigated as a supercapacitor material. The non-annealed delafossite CuCrO2 nanoparticles exhibited outstanding electrochemical performance with high specific capacitance and cycling stability.
CERAMICS INTERNATIONAL
(2022)
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, Inorganic & Nuclear
Manpreet Kaur, Prakash Chand, Hardeep Anand
Summary: In this study, four different methods were used to synthesize nickel cobaltite nanostructures, with scanning electron microscopy revealing the distinct morphology acquired from each methodology. Electrochemical performance testing showed that the coprecipitation method produced the highest specific capacity, while significantly enhanced rate-performance was observed with the same method under different current densities.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Mohammad Taghi Tourchi Moghadam, Majid Seifi, Fatemeh Jamali, Sadegh Azizi, Mohammad Bagher Askari
Summary: In this study, zinc tungstate and zinc tungstate-carbon nanotube were synthesized as supercapacitor electrodes, showing excellent capacitance and stability. Zinc tungstate-carbon nanotube, as the positive electrode in an asymmetric supercapacitor, demonstrated high capacitance and appropriate cycling stability.
SURFACES AND INTERFACES
(2022)
Article
Food Science & Technology
Jiehao Guan, Yi-Cheng Wang, Sundaram Gunasekaran
JOURNAL OF FOOD SCIENCE
(2015)
Article
Food Science & Technology
Yi-Cheng Wang, C. O. Mohan, Jiehao Guan, C. N. Ravishankar, Sundaram Gunasekaran
Article
Engineering, Environmental
Kaiyu Hen, Hua Yang, Liu Wang, Jiehao Guan, Min Wu, Hongmei He, Sundaram Gunasekaran, Xinquan Wang, Qiang Wang, Xiahong Xu
CHEMICAL ENGINEERING JOURNAL
(2019)
Article
Chemistry, Physical
Ya Chen, Li-Tao Cao, Ping Lian, Jie-Hao Guan, Yong Liu
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Article
Energy & Fuels
Weizheng Wang, Omer Sadak, Jiehao Guan, Sundaram Gunasekaran
JOURNAL OF ENERGY STORAGE
(2020)
Article
Chemistry, Physical
Jiehao Guan, Ya Chen, Litao Cao, Yong Liu, Ping Lian, Yuning Gao, Xichang Shi
JOURNAL OF POWER SOURCES
(2020)
Article
Chemistry, Analytical
Jiehao Guan, Kaiyu He, Sundaram Gunasekaran
Summary: In this study, a highly sensitive and selective electrochemical probe was designed for detecting antibiotics in foods. By modifying the electrode with nanomaterials and DNA nanotechnology, the conductivity and biocompatibility were improved, and the detection sensitivity was enhanced with the use of self-assembled TDN. The results showed that the electrochemical probe was able to detect antibiotics such as ampicillin in a short time, with high detection limit and stability.
Article
Nanoscience & Nanotechnology
Omer Sadak, Weizheng Wang, Jiehao Guan, Ashok K. Sundramoorthy, Sundaram Gunasekaran
ACS APPLIED NANO MATERIALS
(2019)
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)
