Article
Thermodynamics
Zhibin Jiang, Ling Chen, Wenguang Zhang, Shiyu Chen, Xiying Jian, Xiang Liu, Hongyu Chen, Chunlei Guo, Weishan Li
Summary: A novel sulfur cathode composite has been reported in this study, which effectively immobilizes the LiPSs and greatly improves the cyclic stability and rate capability of Li-S battery. This composite shows promise for large-scale application due to its easy availability and environmental friendliness.
Review
Chemistry, Multidisciplinary
Tian Yang, Jun Xia, Zhihong Piao, Lin Yang, Shichao Zhang, Yalan Xing, Guangmin Zhou
Summary: The increasing demand for wearable electronic devices has led to a growing interest in flexible batteries with high stability and desirable energy density. Graphene, known for its good conductivity and flexibility, has been used in various components of flexible lithium-sulfur batteries to improve their flexibility, energy density, and cycling stability.
Article
Chemistry, Physical
Yilin Yao, Sizhe Wang, Xiaohua Jia, Jin Yang, Yong Li, Jiaxuan Liao, Haojie Song
Summary: This study reports the preparation of a highly flexible and highly conductive MXene interlayer and investigates its application in lithium-sulfur batteries. The interlayer improves the electrochemical performance of the batteries through adsorption of lithium polysulfides, catalyzing the conversion reaction, and preventing polysulfide deposition. It exhibits excellent capacity retention and decay rate in long-term cycling tests.
Article
Chemistry, Analytical
Yongzhong Jin, Wenjun Zhang, Ting Qing, Ge Chen, Shoujun Zeng, Jiajun Huang
Summary: A novel carbon-coated Fe2O3/helical carbon nanofibers (C@Fe2O3/HCNFs) composite with a 3D sandwich-like structure was successfully synthesized and used as anode materials for lithium-ion batteries (LIBs). The C@Fe2O3/HCNFs anode exhibited excellent long-term cycle life and stability, with a discharge performance of 1298.6 mAh/g after 100 cycles at 200 mA/g, which is 59% higher than that of the Fe2O3/HCNFs anode. The improved electrochemical performance and stable structure of the C@Fe2O3/HCNFs composite were attributed to the interaction between the carbon coating layers, HCNFs, and Fe2O3 nanoparticles during the charge-discharge process. This study highlights the potential application of C@Fe2O3/HCNFs as a novel anode material for LIBs.
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
(2023)
Article
Materials Science, Multidisciplinary
Zhaolin Li, Yaozong Yang, Jie Wang, Zhao Yang, Hailei Zhao
Summary: Silicon suboxide (SiOx) is a potential anode material for high-energy-density lithium ion batteries, but its electrochemical performance is hindered by mechanical instability due to volume variation. In this study, a sandwich-like structure is proposed, where SiOx nanoparticles are sandwiched between graphene sheets and amorphous carbon layer, improving the structural stability. The resulting C/SiOx@graphene material exhibits excellent cyclic performance and rate capability, offering a novel strategy to enhance the stability of high-capacity anode materials for lithium/sodium ion batteries.
INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Peng Wang, Baojuan Xi, Zhengchunyu Zhang, Man Huang, Jinkui Feng, Shenglin Xiong
Summary: The use of catalytic materials to address the sluggish kinetics and shuttle effect in lithium-sulfur batteries is crucial, with single-atom catalysts on graphene modifiers showing improved electrochemical performance.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Chemistry, Multidisciplinary
Lei Huang, Tuxiang Guan, Han Su, Yu Zhong, Feng Cao, Yongqi Zhang, Xinhui Xia, Xiuli Wang, Ningzhong Bao, Jiangping Tu
Summary: In this study, a synergistic interface bonding enhancement strategy was reported to construct flexible fiber-shaped composite cathodes. Polypyrrole@sulfur (PPy@S) nanospheres were implanted into the built-in cavity of self-assembled reduced graphene oxide fibers (rGOFs) using a facile microfluidic assembly method. The resulting cathode showed enhanced electrochemical performance and high-rate capability.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2022)
Article
Energy & Fuels
Zhun Wang, Xinyu Li, Congxu Xuan, Jiajin Li, Yunlong Jiang, Jianrong Xiao
Summary: A novel sandwich-like architecture of Ti(3)C(2)Tx nanosheets intercalated into graphene oxide (GO) skeletons with nitrogen doping, along with efficient adsorption surfaces, was designed to enhance ion/electron transport and polysulfide chemisorption. This structure showed excellent electrochemical performance in lithium-sulfur batteries, achieving high reversible capacity and capacity retention over cycling.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Lubao Liang, Lintong Gao, Zhongyun Ma, Qi Cao, Bo Jing, Xianyou Wang, Yan Lu, Wenxi Wang
Summary: A nanofiber interlayer composed of cobalt wrapped with few-layer phosphorus-doped graphite (CoPG) was designed and used to suppress the shuttle effect and accelerate the conversion kinetics of polysulfides. The CoPG interlayer significantly prolonged the longevity of the Li-S batteries and maintained high capacity retention.
MATERIALS TODAY ENERGY
(2023)
Article
Materials Science, Multidisciplinary
Jin Luo, Xuefeng Liu, Wen Lei, Quanli Jia, Shaowei Zhang, Haijun Zhang
Summary: The structure of sulfur host materials is crucial for improving the performance of lithium-sulfur batteries. In this study, a flexible sulfur host composed of well-designed multichannel carbon fibers decorated with carbon nanotubes and CoS nanoparticles was synthesized. The incorporation of carbon nanotubes and CoS into the host material enhanced the overall conductivity and facilitated the redox reaction of sulfur-related electrochemistry. The results demonstrated high reversible capacity and superb areal capacity, making this approach promising for high energy density lithium-sulfur batteries.
ADVANCED FIBER MATERIALS
(2022)
Article
Materials Science, Ceramics
Lumin Ma, Bin Yue, Xinyue Li, Haiyang Liu, Xu Wang, Jinxian Wang, Guixia Liu, Wensheng Yu, Xiangting Dong
Summary: In this study, a conductive NiCo2O4@PPy micro-flower-like material was synthesized and applied in Li-S batteries to improve the electrochemical performance. NiCo2O4@PPy material expedites the conversion of polysulfides through physical adsorption and chemical anchoring, while polypyrrole can effectively confine polysulfides shuttling, increase conductivity, and promote lithium ions diffusion. The composite exhibits satisfactory electrochemical performance and is a competent candidate for sulfur host material and interlayer in high-performance Li-S batteries.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Rongting Guo, Wei Li, Ruiqin Huang, Mengqi Chen, Zheng Liu, Guo-Cheng Han
Summary: Sandwich-like Ti3C2Tx MXene/SnO2 quantum dots composites were synthesized as a sulfur host to alleviate the shuttle effect of polysulfides in lithium-sulfur batteries. The introduction of SnO2 quantum dots effectively reduced the stacking tendency of MXene, and the interaction between Ti and Sn physically confinesthe polysulfides. The synergistic effect between MXene and SnO2 quantum dots enables the effective alleviation of the shuttle effect of polysulfides and buffering of volume expansion.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Energy & Fuels
Zhuangwei Xiao, Weimin Chen, Zhigao Chen, Chen Chen, Wenzhu Cao, Faquan Yu
Summary: A sandwich-like carbon/MoS2 composite with excellent structural stability and high conductivity is designed and fabricated as an anode material for sodium-ion batteries. The double-carbon encapsulation plays a key role in achieving good stability and high capacity, enabling the reversible conversion of MoS2 and facilitating rapid electron/ion transfer and electrochemical reaction kinetics.
Article
Chemistry, Physical
Yu-Hong Liu, Lan-Xing Li, An-Yi Wen, Fei-Fei Cao, Huan Ye
Summary: A thin (MXene/PP/Cu-TCPP) Janus separator was designed to address the rapid capacity fading and poor safety of lithium-sulfur batteries. The separator had an anisotropic spatial heterogeneity, with a sulfophile cathode-facing surface and a multifunctional ionic sieve on the opposite side. The MXene layer acted as an expanded S host, confining sulfur and its intermediates, while the MOF layer served as an ionic sieve and prevented dendritic growth of Li.
ENERGY STORAGE MATERIALS
(2023)
Article
Materials Science, Composites
Huilan Li, Wenying Xue, Wangcong Xu, Lina Wang, Tianxi Liu
Summary: In this study, flexible and freestanding SPAN nanofiber cathodes were prepared via the electrospinning technique followed by a sulfurization process. The effect of synthesis temperatures on microstructure and electrochemical performance of SPAN was systematically investigated. The SPAN nanofibers prepared at 500 degrees Celsius exhibited the best cell performance with high reversible capacity and low fading rate after 200 cycles.
COMPOSITES COMMUNICATIONS
(2021)
Article
Chemistry, Multidisciplinary
Jiandong Wan, Rui Wang, Zixiang Liu, Longhai Zhang, Fei Liang, Tengfei Zhou, Shilin Zhang, Lin Zhang, Qiquan Lu, Chaofeng Zhang, Zaiping Guo
Summary: Sodium tartrate is used as a dual-functional electrolyte additive to improve the reversibility of aqueous zinc-ion batteries. The additive preferentially adsorbs on the zinc surface, coordinates with zinc ions, and promotes uniform zinc deposition on the (002) plane, inhibiting side reactions and dendrite growth. This leads to long-term cycling stability and improved performance of zinc||MnO2 full cells.
Article
Chemistry, Physical
Rong Hua, Hongbao Li, Jun Zheng, Rui Wang, Quanwei Ma, Tengfei Zhou, Longhai Zhang, Hongwei Kang, Chaofeng Zhang, Yang Zheng
Summary: This work presents a general and effective method for efficient sodium ion storage by constructing SnSe/SnTe nanodots in a nitrogen-doped mesoporous carbon matrix. The unique architecture provides high electronic/ion conductivity and reduces the volume change of the electrode materials, resulting in rapid kinetics and a robust structure. Additionally, the SnSe/SnTe heterostructure promotes charge transfer kinetics, while the high-level nitrogen doping induces abundant defective sites for sodium ion storage.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Zixiang Liu, Rui Wang, Quanwei Ma, Jiandong Wan, Shilin Zhang, Longhai Zhang, Hongbao Li, Qiquan Luo, Jiang Wu, Tengfei Zhou, Jianfeng Mao, Lin Zhang, Chaofeng Zhang, Zaiping Guo
Summary: Tripropylene glycol (TG) is used as an organic electrolyte additive to significantly improve the reversibility of aqueous zinc ion batteries (AZIBs). TG participates in the solvation sheath of Zn2+, regulating overpotential and inhibiting side reactions, while also inhibiting the deterioration of dendrites and modifying the direction of zinc deposition. This method can result in dendrite-free, high-performance, and low-cost energy storage systems.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Physical
Xin Dai, Guangjun Lv, Zhen Wu, Xu Wang, Yan Liu, Junjie Sun, Qichao Wang, Xuyang Xiong, Yongning Liu, Chaofeng Zhang, Sen Xin, Yuanzhen Chen, Tengfei Zhou
Summary: The key means to improve the performance of lithium-sulfur batteries (LSBs) is to reduce the internal resistance and accelerate the conversion kinetics of lithium polysulfides (LiPSs). In this study, a flexible hierarchical CNF-CNT membrane decorated with Co-doped NiS2 nanoparticles (Co-NiS2@CNF-CNT) is designed as an interlayer for LSBs, inspired by a grass root system. The Co-NiS2@CNF-CNT interlayer shows enhanced chemical adsorption and catalytic activities toward LiPSs, resulting in high rate performance, reversible capacity, prolonged cycle life, and increased areal capacity of the LSBs.
ADVANCED ENERGY MATERIALS
(2023)
Review
Nanoscience & Nanotechnology
Qi Chen, Hongwei Kang, Yuchen Gao, Longhai Zhang, Rui Wang, Shilin Zhang, Tengfei Zhou, Hongbao Li, Jianfeng Mao, Chaofeng Zhang, Zaiping Guo
Summary: Organic compounds have great potential as electrode materials for rechargeable batteries, but their inherent defects limit their cycling life and capacity. nanostructured porous polymers (NPP) have been designed and prepared to overcome these limitations, showing superior lithium storage performance.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Chemistry, Multidisciplinary
Wei Wang, Ying Tang, Jun Liu, Hongbao Li, Rui Wang, Longhai Zhang, Fei Liang, Wei Bai, Lin Zhang, Chaofeng Zhang
Summary: Organic materials have potential as electrodes for batteries, but their solubility in electrolyte poses a challenge. In this study, we introduce an organic compound called triresazurin-triazine (TRT) with a porous structure, which inhibits dissolution and improves electrical conductivity. TRT exhibits high capacity, exceptional rate performance, and excellent cycling stability when used as a cathode for aqueous zinc-ion batteries.
Review
Chemistry, Multidisciplinary
Peng Xiong, Shilin Zhang, Rui Wang, Longhai Zhang, Quanwei Ma, Xiang Ren, Yuchen Gao, Ziyang Wang, Zaiping Guo, Chaofeng Zhang
Summary: Compared to inorganic electrode materials, organic electrode materials have advantages such as lightweight, customizable structure, high specific capacity, wide availability of natural resources, and recyclability. However, they also have drawbacks including low ionic conductivity and susceptibility to degradation over time. Covalent triazine frameworks (CTFs) have emerged as a promising strategy for organic electrodes, offering customizability, stability, and versatility. This review provides an overview of CTFs, their synthesis, and their performance in energy storage devices.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Inorganic & Nuclear
Hongwei Kang, Yanrui Pang, Quanwei Ma, Rencheng Jin, Jing Li, Hongbao Li, Longhai Zhang, Yuhuan Dong, Jixiang Yue, Chaofeng Zhang
Summary: Organic compounds are being considered for energy storage electrode materials due to their designability, flexibility, sustainability, and abundance. However, their limited application is due to dissolution in electrolytes and low electrical conductivity, leading to poor cycling stability. In this study, 2-amino-4-thiazole-acetic acid (ATA) and its sodium salt, sodium 2-amino-4-thiazol-derived polymer (PATANa), were used as an anode material, showing a 2D nanosheet structure that improved ion diffusion kinetics. The polymer demonstrated excellent cycling stability and rate capability as an anode for sodium-ion batteries.
DALTON TRANSACTIONS
(2023)
Article
Chemistry, Multidisciplinary
Simin Wang, Qifei Guo, Haoran Liu, Longhai Zhang, Chaofeng Zhang, Tengfei Zhou, Quanwei Ma, Hongbao Li, Rui Wang, Yang Zheng
Summary: Organic small-molecule compounds have shown promise as cathode materials for high-performance lithium-ion batteries due to their high theoretical capacity, efficient utilization of active sites, low cost, and sustainability. However, challenges such as dissolution and poor electronic conductivity hinder their practical application. In this study, a new insoluble organic small molecule, FCPD, was synthesized by grafting ferrocene onto PPD. The FCPD cathode exhibited a large capacity, long lifespan, high-rate capability, and wide voltage window, thanks to its bipolar feature, aromatic, and mesoporous structure.
Article
Chemistry, Multidisciplinary
Qingqing Jiang, Weifang Zhao, Xinyue Xu, Da Ke, Ran Ren, Fuzhen Zhao, Shilin Zhang, Tengfei Zhou, Juncheng Hu
Summary: In this study, carbon-coated MoSe2 decorated Mo(2)CTx MXene heterostructures were fabricated, which exhibited high reversible capacities in potassium-ion batteries.
CHEMICAL COMMUNICATIONS
(2023)
Article
Electrochemistry
Peifan Wang, Xin Dai, Peng Xu, Sijiang Hu, Xuyang Xiong, Kunyang Zou, Shengwu Guo, Junjie Sun, Chaofeng Zhang, Yongning Liu, Tengfei Zhou, Yuanzhen Chen
Summary: In this study, cellulose-based 3D hierarchical porous carbon (HPC) is used as the sulfur host and 2D lamellar porous carbon (LPC) as the polysulfide-proof interlayer, significantly improving the performance of Li-S batteries for practical applications.
Article
Chemistry, Multidisciplinary
Hongbao Li, Rong Hua, Yang Xu, Da Ke, Chenyu Yang, Quanwei Ma, Longhai Zhang, Tengfei Zhou, Chaofeng Zhang
Summary: This study presents the development of a high-energy-density and durable battery for sub-zero temperature operation. By incorporating a unique protective film on the lithium metal anode, the battery exhibits improved performance and capacity retention, making it suitable for deep space exploration and military defense applications.
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)