Article
Chemistry, Physical
M. A. A. Mohamed, L. Singer, H. Hahn, D. Djendjur, A. Oezkara, E. Thauer, I. G. Gonzalez-Martinez, M. Hantusch, B. Buechner, S. Hampel, R. Klingeler, N. Graessler
Summary: In this study, an antiperovskite (Li2Fe)SeO material was synthesized using a one-step solid-state method. The material showed excellent thermal stability and high cycling performance, making it a promising cathode material for lithium-ion batteries.
JOURNAL OF POWER SOURCES
(2023)
Article
Materials Science, Ceramics
Jiuqing Liu, Wen Jiao, Xu Wang, Gaoqiang Mao, Yu Yao, Wanjing Yu, Hui Tong
Summary: In this study, sodium ions were uniformly doped into the nickel-rich cathode material using a hydrothermal method to overcome the problem of cation mixing in highly delithiated state. The doped sodium ions occupied Li sites in the Li slab, widened the diffusion channels of Li+, reduced cation mixing, and supported the crystal structure of nickel-rich ternary cathode material. The doped Na-LNCM exhibited better cycling and rate performance, and lower electrochemical polarization compared with the pristine material.
CERAMICS INTERNATIONAL
(2023)
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
Chemistry, Physical
Ryan Brow, Anthony Donakowski, Alex Mesnier, Drew J. Pereira, K. Xerxes Steirer, Shriram Santhanagopalan, Arumugam Manthiram
Summary: Nickel-rich cathode materials, despite being a promising choice for electric vehicles, face challenges related to long-term cycle life retention and air stability. This study investigates the use of surface treatments, specifically the coating of LiNi0.9Mn0.05Al0.05O2 cathode materials with lithium phosphate, to improve their performance. The results show that low concentration phosphoric acid coating leads to delayed voltage decay and enhanced discharge capacity during high-voltage cycling.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Chemistry, Physical
Yue Li, Ying-de Huang, Jing-yi Li, Chang-long Lei, Zhen-jiang He, Yi Cheng, Fei-xiang Wu, Yun-jiao Li
Summary: In this study, B-doped cathode materials based on layered high-nickel ternary materials were synthesized and evaluated. The results showed that B doping can improve the lithium-ion diffusion rate and enhance the rate performance of the cathode materials. Moreover, boron doping also improved the mechanical properties of the materials and inhibited crack formation. This research provides a new approach for the modification of high-nickel ternary cathode materials and promotes their commercialization.
Article
Chemistry, Physical
Seong Ho Oh, Hye Ji Song, Yongho Lee, Jeonghan Kim, Taeeun Yim
Summary: Dually-functionalized Ni-rich NCM cathode materials are developed using aluminum phosphate for surface modification, which effectively suppress undesired reactions and improve cycling retention.
SOLID STATE IONICS
(2021)
Article
Electrochemistry
Lukman Noerochim, Suwarno Suwarno, Nurul Hayati Idris, Hermawan K. Dipojono
Summary: The exponential growth in production of electric vehicles has led to an increased demand for low-cost, high-performance lithium-ion batteries. However, concerns over the availability of cobalt, a high-cost and rare material used in high-nickel cathodes, may impact the price due to supply constraints. Developing cobalt-free high-nickel cathode materials, such as LiNi1-x-yMnxAlyO2, is necessary to address the reliance on cobalt and its high cost.
Article
Electrochemistry
David Kitsche, Florian Strauss, Yushu Tang, Nikolai Bartnick, A-Young Kim, Yuan Ma, Christian Kuebel, Juergen Janek, Torsten Brezesinski
Summary: Inorganic solid-state batteries have limitations compared to conventional liquid electrolyte-based lithium-ion batteries. The search for advanced coatings to protect the cathode materials in solid-state batteries is a challenge. This study successfully modified the surface of a Ni-rich cathode material using a sol-gel chemistry method, resulting in improved protection and performance.
BATTERIES & SUPERCAPS
(2022)
Article
Chemistry, Physical
Yu-hong Luo, Han-xin Wei, Lin-bo Tang, Ying-de Huang, Zhen-yu Wang, Zhen-jiang He, Cheng Yan, Jing Mao, Kehua Dai, Jun-chao Zheng
Summary: This review comprehensively summarizes the development of nickel-rich and cobalt-free cathode materials, highlighting their competitive advantages in reducing costs and increasing energy density. It emphasizes the importance of developing new materials and provides solutions and future research directions to address current deficiencies in this field.
ENERGY STORAGE MATERIALS
(2022)
Article
Energy & Fuels
Zaowen Zhao, Bao Zhang, Jingtian Zou, Pengfei Li, Zihang Liu, Lei Cheng, Xing Ou, Jiafeng Zhang
Summary: With the increasing demand for electric vehicles, the manufacture of lithium-ion batteries and the consumption of rare resources such as lithium and cobalt are being accelerated. To explore high-efficiency resource reuse, researchers have synthesized high-capacity Ni-rich LiNi0.92Co0.05Mn0.03O2 from a Ni-Co-Cu-Fe alloy powder obtained from recycling spent batteries. The regenerated cathode material exhibits well-crystallized structure and spherical morphology, with promising electrochemical performance.
JOURNAL OF ENERGY STORAGE
(2022)
Article
Chemistry, Physical
Yujing Bi, Yaobin Xu, Ran Yi, Dianying Liu, Peng Zuo, Jiangtao Hu, Qiuyan Li, Jing Wu, Chongmin Wang, Sha Tan, Enyuan Hu, Jingnan Li, Rebecca O'Toole, Liu Luo, Xiaoguang Hao, Subramanian Venkatachalam, Job Rijssenbeek, Jie Xiao
Summary: A new nanoscale phase separation process has been discovered to promote the growth and segregation of single crystal LiNi0.8Mn0.1Co0.1O2 (NMC811). This process occurs directly during high-temperature calcination without significant agglomeration. The conversion of transition metal hydroxide precursors into transition metal oxide intermediates before reacting them with lithium salt is the key factor.
ENERGY STORAGE MATERIALS
(2023)
Article
Chemistry, Physical
Subin Lee, Taeeun Yim
Summary: This study investigates the use of fluorophenyl methyl sulfone as a surface modifier to improve the cycling performance of nickel-rich lithium layered oxides at high temperatures. The results show that the cell cycled with fluorophenyl methyl sulfone exhibits better cycling retention and suppresses the parasitic reactions associated with electrolyte decomposition by forming stable cathode-electrolyte interphases.
JOURNAL OF POWER SOURCES
(2022)
Article
Engineering, Electrical & Electronic
Xiaohong Zhang, Mingcan Wang, Jiayuan Shi, Xiaotao Chen, Fuliang Liu, Bin Shi
Summary: Ti doping can significantly improve the electrochemical performance of LiNi0.8Co0.2-xTixO2 cathode materials, leading to enhanced cycling performance and high rate capability.
JOURNAL OF ELECTRONIC MATERIALS
(2021)
Article
Chemistry, Physical
Sung-Beom Kim, Hyeona Kim, Deok-Hye Park, Ji-Hwan Kim, Jae-Hoon Shin, Jae-Sung Jang, Sang-Hyun Moon, Jin-Hyuk Choi, Kyung-Won Park
Summary: Ni-rich cathode materials doped with varying amounts of F using a solid-state reaction method show improved cycling performance due to strong bonding between transition metals and F, as well as enhanced Li+ ion transport behavior. However, when the F doping level exceeds the optimal amount, Li/Ni antisite defects cause deteriorated Li+ ion transport, leading to decreased performance in lithium-ion batteries.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Taehoon Kim
Summary: Ni-rich NMC batteries have attracted much attention due to their high energy density and capacity. However, they often suffer from interfacial issues and safety concerns. In this study, a multifunctional separator was prepared using a high phosphorus content additive. The synthesized separator showed improved electrolyte uptake and formed a uniform and stable cathode-electrolyte interphase. This enhanced the cycling stability and Coulombic efficiency of the NMC cell, while also providing thermal stability and flame-retardant properties.
ACS APPLIED ENERGY 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)