Article
Chemistry, Inorganic & Nuclear
M. Akhilash, P. S. Salini, K. Jalaja, Bibin John, T. D. Mercy
Summary: A Li-rich cathode material, Li1.5Ni0.25Mn0.75O2.5, with a well-ordered layered structure was successfully synthesized using a simple carbonate co-precipitation method followed by calcination. SEM analysis showed cylinder-shaped particles with diameter in the range 100-350 nm, and electrochemical evaluation revealed an initial specific capacity of around 240 mAhg(-1) at C/20 rate.
INORGANIC CHEMISTRY COMMUNICATIONS
(2021)
Article
Chemistry, Physical
Jianyuan Wu, Cho-Jen Tsai
Summary: In this study, the effects of Zn-doping on the material structure and electrochemical properties of LiCoPO4 (LCP) were explored, revealing an unreported intermediate phase Li1/2Co1-nZnnPO4 and proposing two conjectured configurations. It was found that the redox potential and conductivity of Zn-doped LCP increase with doping concentration, leading to improved rate capability, cycle life, and energy efficiency.
ACS APPLIED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Xiaoqin Huang, Deli Li, Haijian Huang, Xiao Jiang, Zeheng Yang, Weixin Zhang
Summary: The Zn/Mg dual-doped P2-Na0.67MnO2 with lower Mn3+/Mn4+ ratio and higher lattice O content shows improved structural stability and enhanced ion diffusion, leading to high rate performance and decent cycling stability. This co-doping strategy provides a promising avenue for further enhancing the performance of layered Na-ion batteries cathode materials.
Review
Materials Science, Multidisciplinary
Zhe-Dong Liu, Chun-Ying Wang, Jing-Chao Zhang, Jia-Wei Luo, Cui-Hua Zeng, Wei-Di Liu, Rui Liu, Ya-Nan Chen
Summary: The instability of high-Ni cathode materials and the high cost of Co have limited their further application. Therefore, methods to increase the stability of high-Ni cathodes with reduced Co content have been extensively investigated. This review summarizes various effective research progress and potential modification strategies to meet future commercial energy demands.
Article
Chemistry, Physical
Pilgun Oh, Jeongsik Yun, Jae Hong Choi, Gyutae Nam, Seohyeon Park, Tom James Embleton, Moonsu Yoon, Se Hun Joo, Su Hwan Kim, Haeseong Jang, Hyungsub Kim, Min Gyu Kim, Sang Kyu Kwak, Jaephil Cho
Summary: In this study, a secondary doping ion substitution method is proposed to improve the electrochemical reversibility of LCO materials for Li-ion batteries. The utilization of Na ions as functional dopants and Fe-ion substitution improves the capacity retention and cycling stability of LCO. This provides a new avenue for the manufacturing of layered cathode materials with a long cycle life.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Physical
K. Rajammal, K. Ramesh, S. Ramesh, D. Sivakumar
Summary: Olivine LiMPO4 (M = Mn, Ni) cathode materials have attracted wide attention as potential cathode materials for lithium-ion batteries due to their good structural properties, high potential, and specific capacity of up to 170 mAh g(-1). However, poor electronic and ionic conductivity hinders their application in electrochemical devices. This mini review focuses on the doping technique in LiMPO4 (M = Mn, Ni) cathode materials and discusses the enhanced performances based on physical and electrochemical characteristics, as well as a scalable application route.
Article
Chemistry, Physical
Ankush Bhatia, Jiahui Xu, Jean-Pierre Pereira-Ramos, Gwenaelle Rousse, Rita Baddour-Hadjean
Summary: The electrochemical properties of the puckered layered gamma'-V2O5 polymorph as a cathode material in a nonaqueous Zn metal cell using the acetonitrile-Zn(CF3SO3)(2) electrolyte have been investigated for the first time, showing good reversibility and stable capacity with around 130 mAh g(-1) available over at least 60 cycles. The unique structural features of the Zn0.41V2O5 bronze formed through electrochemistry highlight the potential of the gamma'-V2O5 polymorph to mitigate large deformation during electrochemical divalent Zn2+ incorporation.
CHEMISTRY OF MATERIALS
(2022)
Article
Chemistry, Inorganic & Nuclear
Petteri Laine, Marianna Hietaniemi, Juho Valikangas, Toni Kauppinen, Pekka Tynjala, Tao Hu, Shubo Wang, Harishchandra Singh, Lassi Ulla
Summary: The co-precipitation of Ni0.8Co0.1Mn0.1(OH)(2) (NCM811) and Mg-doped (0.25 wt% and 0.5 wt%) NCM811 precursors from concentrated metal sulphate solutions was investigated. The study aimed to understand the impact of magnesium dopant on the co-precipitation step and the performance of Li-ion battery cells using NCM811 as the cathode active material. The results showed that magnesium was fully co-precipitated in the NCM811 precursors and evenly distributed throughout the sample. However, contrary to expectations, magnesium doping did not improve the cyclability of coin cells. Evaluation in pouch cells after 1000 cycles showed a slight improvement in cyclability. Washing effects were observed in lattice parameters, and washing also decreased the capacity retention after 62 cycles for all samples.
DALTON TRANSACTIONS
(2023)
Review
Chemistry, Inorganic & Nuclear
Tao Zhou, Lingling Xie, Qing Han, Xuejing Qiu, Yongmei Xiao, Xinli Yang, Xinhua Liu, Shichun Yang, Limin Zhu, Xiaoyu Cao
Summary: This article introduces the application of vanadates as cathode materials in aqueous zinc ion batteries, analyzes their advantages and challenges in the field of energy storage, and points out future development directions.
COORDINATION CHEMISTRY REVIEWS
(2024)
Article
Chemistry, Multidisciplinary
Juho Valikangas, Petteri Laine, Tao Hu, Pekka Tynjala, Marcin Selent, Palanivel Molaiyan, Kahr Juergen, Ulla Lassi
Summary: This study explores the effects of further processing on the electrochemical performance of the LiNi0.975Al0.025O2 cathode material. Washing the material surface forms a nonconductive nickel oxide phase, reducing initial capacity and enhancing cycle properties. The secondary heat treatment re-lithiates the surface nickel oxide back to the cathode material, increasing initial capacity and cycle properties. Avoiding long-term high voltage charging significantly improves the cycle life.
Article
Chemistry, Physical
Hao Tang, Wenwen Fu, Tian Xie, Long Tan, Runguang Sun
Summary: Introducing P and F ions into the crystal structure of LiNi0.6Co0.2Mn0.2O2 (NCM622) enhances its cycling performance and rate capability. This co-doping technique can also be applied to other layered materials to improve cycle stability of batteries.
SOLID STATE IONICS
(2021)
Article
Electrochemistry
Yuhong Chen
Summary: Li1.05Co0.3Ni0.35Mn0.3M0.05O2 (M=Zn, Fe, Ti, Zr) materials were prepared by co-precipitation method to improve their electrochemical properties and thermal stability. The study found that the impurity ZnO did not affect the electrochemical properties, while the impurity Li2MnO3 did affect the electrochemical properties. Furthermore, doping with Zn2+, Zr4+, or Ti4+ can enhance the dynamic properties of the materials.
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
(2022)
Article
Materials Science, Ceramics
Xiaoying Luo, Yunsong Li, Xuan Cheng
Summary: Sulfur modification can effectively stabilize Li2FeSiO4 cathodes. In this study, a series of carbon-coated Li2FeSiO4 samples with different sulfur contents were prepared and their crystal structures, chemical compositions, microstructures, and electrochemical performances were systematically studied. It was found that sulfur contents over 10% formed impure phases and three types of sulfur states could be found when sulfur and carbon were added to Li2FeSiO4. The overall performance of sulfur-carbon co modified sample is influenced complicatedly by the sulfur content, and the best overall performance was observed with 15% sulfur modification.
CERAMICS INTERNATIONAL
(2023)
Review
Chemistry, Multidisciplinary
Zhiheng Li, Jian Tan, Caiyun Gao, Yuan Wang, Yonggang Wang, Mingxin Ye, Jianfeng Shen
Summary: Organic compounds are attractive alternatives to conventional inorganic materials for aqueous zinc-ion batteries, due to their high theoretical capacities, structural tunability, controllable synthesis, and environmental friendliness. This review provides a systematic overview of recent developments, energy storage mechanisms, and design strategies for aqueous Zn-organic batteries (ZOBs). It summarizes the ion storage mechanisms, analyzes the dynamic behavior, and highlights the synthesis strategies of organic electrode materials. It also discusses strategies to improve the electrochemical performance and the challenges for practical applications of aqueous ZOBs.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Lifeng Cui, Haoyu Qi, Nannan Wang, Xin Gao, Chunyu Song, Jinghua Yang, Gang Wang, Shifeng Kang, Xiaodong Chen
Summary: Transition metal selenide is a potential material for the negative electrode of lithium-ion batteries due to its high density and conductivity. However, the large volume change during charging and discharging process leads to poor performance. CoSe/C-NS with N/S co-doping can address this issue and exhibit high capacity, high rate performance, and long-term cycle stability.
NANOTECHNOLOGY REVIEWS
(2022)
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)