Article
Chemistry, Physical
Tian Rao, Peng Gao, Zimeng Zhu, Shan Wang, Liubin Ben, Yongming Zhu
Summary: The dual-doped LNO cathode material with magnesium and manganese exhibits higher capacity retention, more stable charge transfer impedance, and Li+ diffusion coefficient, improving its structural stability and cycling performance compared to the bare LNO counterpart.
SOLID STATE IONICS
(2022)
Article
Chemistry, Physical
Yin Zhang, Baocong Tian, Qian Shi, KangKang Yao, Minwei Xu
Summary: Li-Mn-O spinels with a Li-gradient achieved by surface treatment exhibit good cycle stability and relatively high capacity.
APPLIED SURFACE SCIENCE
(2022)
Article
Electrochemistry
Xiaoyan Yan, Yingnan Li, Xiaohua Zhang, Xinxin Zhao, Baosheng Liu
Summary: A sulfurophilic Ni-Co bimetallic sulfide, with manganese doping, was synthesized for the cathode of lithium-sulfur batteries. The characterization showed that the incorporation of manganese effectively altered the particle size and crystallinity. The NiCoMn-S/CNT composite was further produced as the sulfur host, which physically restricts polysulfides and improves the redox reaction kinetics. The electrochemical performance of the material was enhanced in lithium-sulfur batteries by doping metallic ions into the NiCo2S4 lattice.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Multidisciplinary
Junliang Lu, Bo Cao, Bingwen Hu, Yuxin Liao, Rui Qi, Jiajie Liu, Changjian Zuo, Shenyang Xu, Zhibo Li, Cong Chen, Mingjian Zhang, Feng Pan
Summary: The introduction of heavy fluorination into the layered anionic framework of a Li-Mn-O-F cathode has successfully inhibited the irreversible oxygen redox process, improved the reversibility of oxygen redox, and greatly enhanced the reversible capacity to nearly reach the theoretical capacity.
Article
Chemistry, Physical
Weiyuan Huang, Xiaoyuan Li, Wenguang Zhao, Chen Zhu, Hengyu Ren, Haibiao Chen, Feng Pan, Mingjian Zhang
Summary: Li-Mn-O layered oxides are a promising low-cost cathode material, but their thermal stability needs improvement. This study investigates the heat-induced structural/chemical evolution of Li-Mn-O materials and successfully synthesizes new materials with different core-shell microstructures.
Article
Chemistry, Physical
Jie Ji, Houzhao Wan, Bao Zhang, Cong Wang, Yi Gan, Qiuyang Tan, Nengze Wang, Jia Yao, Zhaohan Zheng, Pei Liang, Jun Zhang, Hanbin Wang, Li Tao, Yi Wang, Dongliang Chao, Hao Wang
Summary: This study introduces a multi-valence cobalt-doped Mn3O4 cathode material (Co-Mn3O4) with high capacity and reversibility. The various states of doped cobalt play different roles in the manganese oxide, effectively improving the performance of the battery.
ADVANCED ENERGY MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Hyun Gyu Park, Kyoungmin Min, Kwangjin Park
Summary: The synergistic effect of Na+/Al3+ dual doping on improving the structural stability and electrochemical performance of LiNi0.88Co0.08Mn0.04O2 cathodes for Li-ion batteries is investigated. The dual doping changes the lattice parameters and cation mixing of the cathode material, and Na+ acts as a pillar ion for Li-ion diffusion. The obtained NNCMA material with an ideal lattice structure exhibits excellent structural stability, favorable Li-ion diffusion, low polarization, and low cation mixing, resulting in improved rate capability and capacity retention.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Multidisciplinary Sciences
Shuo Sun, Chen-Zi Zhao, Hong Yuan, Zhong-Heng Fu, Xiang Chen, Yang Lu, Yun-Fan Li, Jiang-Kui Hu, Juncai Dong, Jia-Qi Huang, Minggao Ouyang, Qiang Zhang
Summary: The surface oxygen instability of Li-rich Mn-based oxide (LRMO) cathodes is identified as the cause for interfacial degradation in all-solid-state lithium batteries (ASSBs). By replacing surface oxygen with sulfite, overoxidation and interfacial degradation can be effectively prevented, leading to high capacity and cycling stability.
Article
Chemistry, Physical
Weiwei Jiang, Yahui Li, Junjie Li, Guoyu Ding, Yijie Zhan, Jiajia Peng, Xiaofei Yan, Xi Deng, Jiawei Tan, Jiawei Xu, Changxin Tang, Yu Dai, Fugen Sun
Summary: The oxygen doped MoS2 nanosheets were grown into 3D porous graphene frameworks and used as coatings for commercial PP separators in Li-S batteries. The O dopants expanded and disturbed the interlayer structures of MoS2, creating active edge sites for polysulfide adsorption and catalytic conversion. The activated MoS2 and the graphene frameworks synergistically improved the electrochemical performance of the Li-S cells.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Electrochemistry
Rakesh Saroha, Jung Sang Cho, Jou-Hyeon Ahn
Summary: This study presents an effective strategy of co-doping to delay structural variations and inhibit transition metal migration in Li-rich cathode materials for lithium-ion batteries, resulting in improved cycling stability and high-rate capability.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Multidisciplinary
Hongying Hou, Jinxu Qiu, Bao Li, Liang Wang, Zhuangzhuang Zhang, Mengmin Jia, Xiaobing Lai, Mingming Han, Pengyao Yan, Dai-Huo Liu, Dongmei Dai, Bao Wang
Summary: P2-type layered oxides are of interest due to their superior structure and performance. By doping with the same-period element Cu, the cathode material exhibits higher rate capacities and more stable structures.
CHINESE CHEMICAL LETTERS
(2023)
Article
Chemistry, Multidisciplinary
Arunakumari Nulu, Young Geun Hwang, Venugopal Nulu, Keun Yong Sohn
Summary: In this study, nano/micro silicon particles were successfully prepared by a scalable process called ball milling, and then a metal-doped silicon/graphite composite was obtained through metal doping and high-temperature annealing with graphite. The composites showed high reversible capacities and improved Li+ diffusion properties, making them suitable for Li+ storage applications. The enhanced electrochemical properties were attributed to the synergistic effect of metal doping and graphite addition to silicon.
Article
Engineering, Chemical
Hongling Yi, Lei Tan, Lingfeng Xia, Lingjun Li, Hongxing Li, Zengsheng Liu, Chu Wang, Zixiang Zhao, Junfei Duan, Zhaoyong Chen
Summary: Ce-doped and CeO2-coated NCM523 cathode materials were synthesized by a smart one-step calcination process, with CeO2 coating layers preventing electrode exposure to electrolyte and promoting lithium deintercalation kinetics, and Ce modification improving cathode material capacity retention.
ADVANCED POWDER TECHNOLOGY
(2021)
Article
Chemistry, Physical
Yehonatan Levartovsky, Arup Chakraborty, Sooraj Kunnikuruvan, Sandipan Maiti, Judith Grinblat, Michael Talianker, Doron Aurbach, Dan Thomas Major
Summary: In this study, Nd- and Y-doped materials, Li(Ni0.85Co0.1Mn0.05)0.995Nd0.005O2 and Li(Ni0.85Co0.1Mn0.05)0.995Y0.005O2, were found to have significantly better structural, electrochemical, and thermal properties compared to the reference LiNi0.85Co0.1Mn0.05O2 (NCM85). The doped electrodes exhibited higher specific discharge capacities, better capacity retention, and lower voltage hysteresis. Additionally, the thermal stability of NCM85 was enhanced by doping with Nd or Y.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Xiao-Hua Zhang, Ru Jiang, Chao-Ying Fan, Dan Xie, Bao Li, Jing-Ping Zhang, Xing-Long Wu
Summary: The hierarchical porous carbon nanotubes network (NOPCT) with high N/O-co-doping content shows excellent performance and cycle stability in Li/Na-ion batteries and hybrid Li metal anodes. It also plays a key role in the sustainability of sulfur electrodes, demonstrating great potential for practical application in advanced ESSs. The study provides valuable insights into the design and development of all-purpose electrode materials for energy storage systems.
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)