Article
Chemistry, Physical
A. Y. Chen, H. H. Liu, P. Qi, X. F. Xie, M. T. Wang, X. Y. Wang
Summary: 3D flower-like MoS2/NiCoHC composites were synthesized using MoS2 nanospheres as precursors, showing high specific capacity and cycling stability. Moreover, the asymmetric supercapacitor with MoS2/NiCoHC as positive electrode achieved a high power density.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Electrochemistry
Weishan Tang, Junqian Bai, Pengcheng Zhou, Qihang He, Feng Xiao, Maojie Zhao, Peilin Yang, Lei Liao, Yuan Wang, Ping He, Bin Jia, Liang Bian
Summary: A honeycomb-like electrode with hierarchical structure has been synthesized using NiCo-LDH/PMB/CC composite electrode materials, which demonstrate high specific capacitance and rich active sites. The assembled BSHD shows excellent capacity retention even at high current density, and still maintains decent specific energy at high specific power.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Hong Jia, Xinyu Zhu, Tingting Song, Jinping Pan, Feng Peng, Longhua Li, Yu Liu
Summary: In this study, a fibrous hierarchical nanocomposite composed of carbon microfibers covered with a layer of metal-organic framework derived from nickel-cobalt layered double-hydroxide nanosheets decorated with (NiCo)Se-2 nanoparticles was fabricated using an in-situ self-templated method. The nanocomposite exhibited improved electrical conductivity, high capacity, and structural stability, leading to an impressive capacity of 1394.2 F g(-1) at 1 A g(-1) and high energy and power densities in a hybrid supercapacitor. These results suggest the potential of the hierarchical nanocomposite as a powerful electrode for advanced next-generation supercapacitors.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Xiangyu Han, Jien Li, Junlin Lu, Shuang Luo, Jing Wan, Bangxing Li, Chenguo Hu, Xinlu Cheng
Summary: The three-dimensional NiCo(NA)-LDH nanosheet networks prepared by electrodeposition show excellent electrochemical performance in supercapacitors, with high areal capacitance and specific capacitance, achieving high energy density and working potential window. Additionally, the device exhibits outstanding cycle stability even after 10,000 cycles, showcasing great potential in energy storage applications.
Article
Chemistry, Multidisciplinary
Wenjun Liu, Wenbo Xu, Guofa Dong, Ming Fang
Summary: This study presents the design and controlled fabrication of hierarchically structured nanomaterials as potential catalysts for urea oxidation reaction. The prepared hybrid catalyst demonstrates remarkable improvements in reaction kinetics, benefiting from synergistic enhancements in charge transfer and efficient mass transport facilitated by its unique hierarchical architecture. These findings highlight the tremendous potential of this innovative material designing strategy to drive advancements in electrocatalytic processes.
Article
Energy & Fuels
Hao Guo, Yanrui Hao, Ning Wu, Cuiliu Li, Hao Zhang, Yinsheng Liu, Jiaying Tian, Wu Yang
Summary: In this study, a novel nickel-cobalt double hydroxide/cobalt carbonate hydroxide nanosheets composite (NiCo-DH/NSs) is successfully fabricated with excellent electrochemical performances. Cobalt carbonate hydroxide with nanosheet morphology is prepared through a simple hydrothermal approach and used as a substrate for in-situ growth of metal-organic framework. The resulting NiCo-DH/NSs as positive electrode material exhibits high specific capacity and outstanding rate performance, while a high specific capacitance of negative electrode material (BiOBr microsphere) is also achieved. The assembled NiCoDH/NSs//BiOBr asymmetric supercapacitor device demonstrates ultrahigh energy density at a given power density.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Yung-Fu Wu, Yu-Cheng Hsiao, Chen-Hao Liao, Chia-Shuo Hsu, Sibidou Yougbare, Lu-Yin Lin
Summary: In this study, sulfur-doped nickel and cobalt layered double hydroxide and polypyrrole nanotubes composites were successfully designed as efficient active materials for battery supercapacitors. The optimized design achieved high specific capacitance and energy density, as well as good cycle stability and Coulombic efficiency.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Physical
Liu Wan, Tao Jiang, Yan Zhang, Jian Chen, Mingjiang Xie, Cheng Du
Summary: Sluggish kinetics and poor structural stability are two main obstacles in the exploration of transition metal selenides (TMSs) for supercapacitors. In this study, a core-shell cobalt iron selenide (CoFe2Se4) @ cobalt nickel carbonate hydroxide (CoNi-CH) heterostructure was directly fabricated on carbon cloth. The heterostructure combines the highly conductive CoFe2Se4 for rapid electron transfer and the highly electroactive CoNi-CH for multiple redox reactions. The CoFe2Se4@CoNi-CH electrode exhibits increased specific capacity and enhanced rate capability compared to pure CoFe2Se4 and CoNi-CH. Furthermore, a hybrid supercapacitor utilizing the CoFe2Se4@CoNi-CH cathode and porous carbon anode achieves a high energy density and excellent durability.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Chemistry, Multidisciplinary
Jiamin Ma, Jiale Xia, Zhong Liang, Xiaoyun Chen, Yaping Du, Chun-Hua Yan
Summary: Layered double hydroxides (LDHs) are promising electrodes for supercapacitors due to their adjustable composition and superior high capacity, but their experimental specific capacity is lower than theoretical value. Intercalating large-sized anions to increase interlayer spacing is crucial for performance improvement, as demonstrated in a study where a cobalt-nickel LDH hollowcage intercalated with 1,4-benzenedicarboxylic acid showed improved specific capacity and rate performance. The sample with the largest layer spacing achieved a maximum specific capacity of 229 mA h g(-1) at 1 A g(-1), and a hybrid supercapacitor with this sample showed good energy density and cycle stability.
Article
Materials Science, Multidisciplinary
Xiaoyang Xuan, Min Qian, Likun Pan, Ting Lu, Yang Gao, Yueping Niu, Shangqing Gong
Summary: This article introduces a flexible battery with a smart electrochromic function and designs a Ni // Zn battery with an electricity visual alerting function. The battery has a high energy density and reversible color change, allowing for visual monitoring of the battery's residual electricity.
SCIENCE CHINA-MATERIALS
(2023)
Article
Energy & Fuels
Tsung-Rong Kuo, Istikhori Fitriannisa, Ren-Jei Chung, Kuan-Hsien Lin, Sibidou Yougbare, Lu-Yin Lin, Yung-Fu Wu
Summary: In this study, CuCo2S4 and Ni(OH)2 composites (CuCo2S4@Ni(OH)2) were designed and investigated as efficient electroactive materials for Battery Supercapacitor Hybrid (BSH). The effects of Ni(OH)2 amounts on the electrochemical and physical properties of CuCo2S4@Ni(OH)2 were studied. A higher specific capacitance and capacity were achieved for the optimal CuCo2S4@Ni(OH)2 electrode, compared to CuCoS4 and Ni(OH)2 electrodes. A BSH with high performance was fabricated using the CuCo2S4@Ni(OH)2 electrode and activated carbon electrode, achieving a wide potential window and high energy density.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Energy & Fuels
Changhai Li, Guohua Jiang, Muslum Demir, Yanfang Sun, Rui Wang, Tianqi Liu
Summary: In this study, reduced graphene oxide/MXene-based composite electrodes combined with Fe2O3 and NiCo-P as the negative and positive electrodes were prepared and their performance parameters, such as specific capacitance and energy density, were tested, demonstrating the potential application of composite electrode materials for supercapacitors.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Materials Science, Multidisciplinary
Valerii Kotok, Peter Ondrejka, Miroslav Mikolasek, Michaela Sojkova, Patrik Novak, Maros Gregor, Vadym Kovalenko, Kostyantyn Sukhyy
Summary: The self-decomposition reaction of the nickel ammonia complex was used for the formation of nickel hydroxide on nickel foam, and the formation method was modified by the addition of polyvinyl pyrrolidone (PVP) and the electrochemical or chemical activation with cobalt hydroxide. In all cases, Ni(OH)2 nanoflakes were formed, and the chemical activation process resulted in the precipitation of flower-like Co(OH)2 particles among the nanoflakes. It was found that the presence of PVP during the nickel ammonia complex decomposition suppressed the highly branched particles, leading to enhanced capacitive properties of the formed electrode at high current densities. The highest capacitance of 1408 F/g at 1 A/g was achieved for the sample precipitated with the presence of PVP and further chemical activation with cobalt.
Article
Chemistry, Physical
Yizhong Zou, Wen -Da Zhang, Hanwen Xu, Jingguo Yang, Jiangyong Liu, Zhi-Guo Gu, Xiaodong Yan
Summary: By synthesizing NiCo hydroxide nanosheets with abundant Ni3+ species and surface ligands through in-situ structural transformation of bimetallic organic frameworks in alkaline media, efficient glycerol oxidation reaction can be achieved. The incorporation of Co ions increases the content of Ni3+ species, and a Ni/Co ratio of 1.0 leads to optimal catalytic performance.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2023)
Article
Chemistry, Physical
Bushra Safdar, Aryal Krishna Prasad, Kwang-Soon Ahn
Summary: NiCo-mixed hydroxide synthesized by potentiostatic electrodeposition technique showed significantly improved optical contrast and faster coloration response compared to single metal hydroxides. The enhanced electrochromic response was attributed to increased porosity, active surface area, and charge transfer process due to the presence of two metal ions. Therefore, NiCo-mixed hydroxide is a promising alternative platform for electrochromic cells.
CHEMICAL PHYSICS LETTERS
(2021)
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)