Article
Materials Science, Multidisciplinary
Xin Zhao, Xiang Zhang, Zhiwei Yin, Wenjie Li, Changpeng Yang, Wenhai Sun, Hulin Zhang, Yao Li
Summary: In this work, W-doped NiO films were prepared by RF magnetron co-sputtering to improve the performance of NiO. The optical modulation of W-NiO was significantly improved compared with pure NiO, and the response time was similar to NiO film. The all-solid-state electrochromic devices (ECDs) employing W-NiO showed high modulation capabilities and great potential for applications in smart windows and spacecraft thermal control devices.
Article
Chemistry, Physical
Ishita Naskar, Soumyadip Roy, Partha Ghosal, Melepurath Deepa
Summary: The technological importance of cost-effective zinc-doped nickel oxide (Zn:NiO) coatings is demonstrated by their applications in energy-saving electrochromic devices (ECDs) and energy-storing asymmetric supercapacitors (ASCs). A simple doping and a redox-gel significantly enhance the performance of these devices, achieving improved electrical conduction, high specific capacitance, and long cycle life. The potential of Zn doping is further showcased in panchromatic visible light modulation of ECDs, making them suitable for smart window applications.
ACS APPLIED ENERGY MATERIALS
(2023)
Review
Energy & Fuels
Suhas H. Sutar, Bapuso M. Babar, Komal B. Pisal, Akbar I. Inamdar, Sarfraj H. Mujawar
Summary: Smart and multifunctional devices are gaining interest in the scientific community as technological advancements increase. Supercapacitors, with their high energy and power density capabilities, can bridge the gap between batteries and fuel cells. This article discusses the potential and performance of NiO-based electrochromic technology in various applications.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Chao Wu, Ye Yang, Wangwang Feng, Weijie Song, Ruiqin Tan
Summary: A novel technical routine using Si and Li co-doping oxide target in Ar atmosphere and subsequent RTA treatment at 400 degrees C has been developed to improve the EC performance of nickel oxide counter-electrode films. The doped and annealed film shows superior properties with high bleached transmittance, large optical modulation, big charge capacity, excellent electrochemical stability, and rapid response times, making it promising for future high-quality EC devices.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Yilin Ding, Mengying Wang, Zheyue Mei, Lei Liu, Xiaolan Zhong, Mei Wang, Xungang Diao
Summary: We have successfully prepared W@NiO composite films to significantly improve the electrochromic properties through the dual impact of doping and pre-annealing. The obtained W@NiO-200 films show improved charge density, optical modulation, coloration efficiency, specific capacitance, as well as cyclic reversibility, rapid response time, and prolonged cycle lifespan. This study provides a new strategy for preparing high-quality electrochromic NiO films using sputtering technology.
Review
Energy & Fuels
Junkai Wang, Xiangtao Huo, Min Guo, Mei Zhang
Summary: With the rapid development of economy, developing new kinds of materials with dual or multi functions may be the key to resolving the energy crisis and environmental pollution. Nickel oxide (NiO) has been proved to be a promising material for integrated devices such as electrochromic capacitors and/or energy storage smart windows. However, there are still great challenges in engineering between energy storage and electrochromic devices.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Physics, Multidisciplinary
Hang Yun, Ren He, Zishou Hu
Summary: This paper proposes a physical model using tungsten trioxide, nickel oxide, and LiClO4-propylene carbonate solution to investigate the electrochromic process mechanism and predict the electrochromic behavior. The model considers ion diffusion, electromigration, and describes ion transport kinetics using the Nernst-Plank equation. Moreover, the model incorporates the Poisson equations, Ohm's law, and Frumkin-Butler-Volmer equation to govern the behavior at the interfaces.
Article
Materials Science, Multidisciplinary
Kyung Ho Kim, Misaki Morohoshi, Yoshio Abe
Summary: Ni-Co oxide thin films were grown on FTO-coated glass substrates using a one-pot solution process with different ratios of Ni and Co precursors. The resulting nanosheet structures exhibited varied distribution and width depending on the precursor ratio. Ni-8-Co-2 and Ni-6-Co-4 samples showed superior electrochemical performance and fast color switching. The findings suggest that the color modulation of Ni-Co oxide samples can be effectively controlled by adjusting the precursor ratios.
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
(2022)
Article
Chemistry, Multidisciplinary
Jin-Long Wang, Jian-Wei Liu, Si-Zhe Sheng, Zhen He, Jie Gao, Shu-Hong Yu
Summary: By coassembling W18O49 and V2O5 nanowires, a novel multicolor electrochromic device is demonstrated, which shows dynamic color change upon application of different electrochemical biases. The transparency and color of the device can be easily controlled by manipulating the layers and ratios of coassembled nanowires, allowing for the fabrication of different patterns with corresponding masks. This solid electrochromic device assembled from nanowires has significant potentials in smart windows and multicolor electrochromic displays.
Article
Chemistry, Physical
Gyeongbin Ko, Seongdeock Jeong, Sanghyuk Park, Jimin Lee, Seoa Kim, Youngjun Shin, Wooseok Kim, Kyungjung Kwon
Summary: Lithium-ion batteries (LIBs) are crucial for the electric vehicle (EV) industry, and LiNi1-x-yCoxMnyO2 (NCM) is the dominant cathode material used in EV LIBs. Due to the need for increased driving range, Ni content in NCM is maximized, but the resulting Ni-rich NCM is unstable. Doping with foreign elements has been explored as a strategy to overcome this instability, with over 46 elements considered and their effects on LIB performance investigated in numerous research articles. This comprehensive analysis of various doping elements and their impact on LIB performance provides valuable insights for the LIB industry and academia.
ENERGY STORAGE MATERIALS
(2023)
Article
Electrochemistry
Fangyuan Zhao, Haiyan He, Ziqiang Cheng, Yongkang Tang, Gang Li, Gang Xu, Yong Liu, Gaorong Han
Summary: Porous Cu-doped NiO films were fabricated using a cost-effective chemical bath deposition method. Cu doping significantly increased the porosity of the electrodes and the ratio of Ni3+/ Ni2+, enhancing the electrolyte penetration and chemical reactivity. However, the electrochromic and electrochemical behaviors exhibited a nonmonotonic change with Cu doping content. The optimal electrode with 0.5% Cu doping showed good cyclic stability.
ELECTROCHIMICA ACTA
(2022)
Article
Electrochemistry
Zhicheng Xie, Yingying Zhang, Xiuqin Min, Anbao Yuan, Jiaqiang Xu
Summary: A sulfur-modified NCA cathode material was prepared with the addition of lithium sulfide as the sulfur-containing additive. The doping of sulfur anion reduced Ni2+ content and improved structural stability, resulting in excellent cycling stability and storage stability of the co-modified material. The enhanced electrode/electrolyte interfacial stability also contributed to the significantly improved cyclability of the material.
ELECTROCHIMICA ACTA
(2021)
Article
Materials Science, Multidisciplinary
Suchita Kandpal, Ilya Ezhov, Manushree Tanwar, Denis Nazarov, Denis Olkhovskii, Leonid Filatov, Maxim Yu. Maximov, Rajesh Kumar
Summary: In order to design solid state hybrid or all-inorganic electrochromic devices, alternative methods for depositing electrochromic metal oxide thin films need to be explored. The electrochromic performance of a hybrid device using plasma assisted atomic layer deposition (ALD) grown nickel oxide (NiO) thin film and viologen was studied. The films of NiO with a thickness of a few tens of nanometers were first deposited on silicon, and then on Fluorine-doped Tin Oxide (FTO)/glass substrates to fabricate the device. The as-prepared films were analyzed for their structural and morphological properties, and a solid state organic-inorganic hybrid electrochromic device was fabricated. The device demonstrated impressive electrochromic behavior with high coloration efficiency, contrast ratio, and cycle life/stability. The ALD grown films showed advantage over other methods in terms of the smoothness and crack-free nature, allowing for proper power utilization in color switching. These results provide a new way to fabricate high-performance hybrid solid state electrochromic devices.
Article
Engineering, Electrical & Electronic
Xin Shen, Meiqi Yang, Chengxing He, Tianshuo Zhao, Devan Solanki, Rito Yanagi, Ben Gibbs, Gouri Krishnan, Shu Hu
Summary: This study fills the gaps in the current research on EC materials by employing atomic layer deposition (ALD) to grow a (Ti,Cr)Ox film as a new subset of EC coatings that operates in direct contact with aqueous solutions. The protective and bipolar coloration properties of the (Ti,Cr)Ox are achieved by the ALD alloying of TiO2 and CrOx nanocrystals. The results show that this ALD-grown ternary EC coating can also act as a surface protection layer and has unique advantages over other EC materials to achieve balanced performance among color tunability, coloration efficiency, and cycle stability.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
Article
Engineering, Electrical & Electronic
Xin Shen, Meiqi Yang, Chengxing He, Tianshuo Zhao, Devan Solanki, Rito Yanagi, Ben Gibbs, Gouri Krishnan, Shu Hu
Summary: In this research, atomic layer deposition (ALD) was used to grow a new (Ti,Cr)O-x film as a subset of electrochromic (EC) coatings that can directly contact aqueous solutions and have protective and bipolar coloration properties. This study showed that the ALD-grown ternary EC coating can also act as a surface protection layer and has unique advantages in achieving balanced performance among color tunability, coloration efficiency, and cycle stability.
ACS APPLIED ELECTRONIC MATERIALS
(2023)
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)