Article
Chemistry, Physical
Xiaofu Tang, Diping Zeng, Dongrui Chen, Wenmin Guo, Jun Fu, Lihua Zou
Summary: This study develops a rational strategy to trap porous silicon within a stable 3D framework of interconnected N-doped graphene and carbon nanotubes, forming a composite material of PSi@NG/CNT. The PSi@NG/CNT composite exhibits excellent lithium storage properties with high specific capacity, remarkable rate capability, good cycling retention, and high columbic efficiency. This work provides new insights into the rational design of electroactive materials with ultrahigh stability for silicon-based anodes in high energy density lithium-ion batteries.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Multidisciplinary
Zhao Zhang, Fengshuo Xi, Xiuhua Chen, Shaoyuan Li, Wenhui Ma, Zhao Ding, Tao Qu, Yongnian Dai, Rong Deng
Summary: In this study, spherical porous silicon was prepared by recycling microsilica waste from the photovoltaic industry, and nitrogen-doped carbon was coated on the surface to create a coral-like structure. The material showed excellent performance in lithium-ion batteries, with good accommodation of volumetric changes of silicon.
ENVIRONMENTAL CHEMISTRY LETTERS
(2022)
Article
Chemistry, Physical
Jinfu Zhao, Binglong Rui, Wenxian Wei, Ping Nie, Limin Chang, Xiangxin Xue, Limin Wang, Jiangmin Jiang
Summary: In this study, a novel in-situ self-catalytic strategy was proposed to encapsulate silicon nanoparticles with highly graphitic carbon using chemical vapor deposition. The synthesized silicon-carbon composites exhibited improved electronic conductivity and significant suppression of volume expansion, leading to excellent lithium storage capabilities and high energy density in lithium-ion batteries. The effectiveness of the in-situ self-catalytic reaction in enhancing the overall energy storage performance was demonstrated.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2022)
Article
Materials Science, Multidisciplinary
Ben Xiang, Wei-Li An, Ji-Jiang Fu, Shi-Xiong Mei, Si-Guang Guo, Xu-Ming Zhang, Biao Gao, Paul K. Chu
Summary: This study demonstrates a method to produce blackberry-like porous silicon nanospheres controllably using a magnesiothermic reduction reaction, providing better control of kinetics and heat release compared to traditional methods. The resulting porous silicon material has higher structural integrity, and the encapsulated composite shows superior cycling stability and rate performance.
Article
Chemistry, Physical
Qian Liu, Yaxin Ji, Ximeng Yin, Junwei Li, Yangjie Liu, Xiang Hu, Zhenhai Wen
Summary: A newly synthetic route using the Mg-thermal reduction method was developed to fabricate three-dimensional porous Si/C nano-architectures as anode material for high energy-density lithium-ion batteries. The nano-architectures demonstrate favorable properties and structure for stable solid-electrolyte interface, Li+ transport, and mitigating volume expansion effect.
ENERGY STORAGE MATERIALS
(2022)
Article
Biochemistry & Molecular Biology
Xiuxia Zuo, Qinghua Yang, Yaolong He, Ya-Jun Cheng, Shanshan Yin, Jin Zhu, Peter Mueller-Buschbaum, Yonggao Xia
Summary: In this study, a facile HF-free method was proposed to synthesize macro-/mesoporous silicon with good cyclic and rate performance. By increasing the reduction temperature, the structure of the silicon material changed and could effectively withstand mechanical stress, improving the cyclic stability.
Article
Chemistry, Analytical
Sicheng Fan, Xiangyang Zhou, Herong Xu, Tingjie Hu, Penghui Cao, Chucheng Luo, Jiong Wang, Haoteng Yao, Jingjing Tang, Juan Yang
Summary: Porous Si/nitrogen-doped carbon nanosheets (Si/ NCNS) composites were successfully synthesized by in situ growth of nano-silicon on a graphene-like carbon. This composite material not only provides rapid transferring channels but also relieves the volume change, showing excellent electrochemical performance.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2022)
Article
Chemistry, Physical
Tianhao Wang, Xiang Ji, Fuzhong Wu, Wanliang Yang, Xinyi Dai, Xuejiao Xu, Jing Wang, Dan Guo, Meili Chen
Summary: A novel three-dimensional coral-like Si nanostructure coated with C/rGO was successfully prepared through high-temperature magnesiothermic reduction, effectively managing volume expansion and enhancing electrode conductivity for improved cycling stability.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Nanoscience & Nanotechnology
Dajin Chen, Chuanying Tao, Tongzhou Chen, Xiaohan Liu, Yong Liu, Gang Xu, Gaorong Han
Summary: In this study, a pomegranate-like silicon-based anode was prepared by magnesiothermic reduction, using hollow-structured Si/void@C nanoparticles self-assembled. The anode exhibited high reversible capacity, long cycle life, and high Coulombic efficiency, attributed to the tolerant presealed void in the carbon shells of the primary nanoparticles.
Article
Materials Science, Ceramics
Ichiro Imae, Kohei Yukinaga, Keiichi Imato, Yousuke Ooyama, Yuta Kimura
Summary: In this study, silicon/graphene composites were successfully synthesized through a simple and environmentally friendly method for the anode material of lithium-ion batteries. The experimental results demonstrated that these composites exhibited higher charge-discharge capacities and cycle characteristics compared to traditional materials, with comparable or even superior performance.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Qiuyan Li, Ran Yi, Yaobin Xu, Xia Cao, Chongmin Wang, Wu Xu, Ji-Guang Zhang
Summary: This study focuses on the design and failure analysis of a silicon (Si) anode for lithium-ion batteries (LIBs). The volumetric energy density of the Si anode depends heavily on factors such as Si/C loading, anode calendering density, first-cycle coulombic efficiency, and anode capacity density. Stable Si/C electrode structure is crucial for long-term cycling, and the degree of prelithiation needs to be balanced with cycle life.
JOURNAL OF POWER SOURCES
(2022)
Article
Chemistry, Physical
Yanqing Wang, Chunshun Yuan, Kunming Li, Dong Li, Anqi Ju
Summary: This study successfully prepared freestanding porous silicon@heteroatom-doped porous carbon fiber by designing a porous structure and adopting heteroatom doping strategy. The material exhibits excellent reversible capacity and cycling stability, indicating its potential application in advanced energy storage.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Electrochemistry
Naeun Yoon, Chohee Young, DongHwan Kang, Hyejeong Park, Jung Kyoo Lee
Summary: A rotational magnesiothermic reduction (R-MR) system was developed to efficiently produce high purity porous silicon (pSi) with high yield. The carbon-coated pSi/C samples and pSi/C@Gr composites exhibited stable cycling performance at high capacity and high cycling efficiency.
ELECTROCHIMICA ACTA
(2021)
Article
Electrochemistry
Yunpeng Shan, Junzhang Wang, Zhou Xu, Shengchi Bai, Yingting Zhu, Xiaoqi Wang, Xingzhong Guo
Summary: Bi-continuous silicon/carbon (Si/C) anode materials were prepared via magnesiothermic reduction of silica aerogels followed by pitch impregnation and carbonization. The innovative bi-continuous structure, featuring both Si and carbon with a cross-linked structure, provides an area to accommodate the volume change of Si. The obtained Si/C anodes exhibited excellent electrochemical performance, showing potential applications in high-performance lithium-ion batteries.
Article
Chemistry, Physical
Feng Hong, Ruxuan Zhou, Chenyu Gao, Yishao Liu, Zhenjie Sun, Yang Jiang
Summary: A gas-phase magnesiothermic reduction strategy was proposed to fabricate highly porous SiOx/nanoSi@C composites. The composites showed excellent electrochemical performance with a reversible capacity of 1067.92 mAh/g.
JOURNAL OF ALLOYS AND COMPOUNDS
(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)