Article
Materials Science, Ceramics
O. V. Sreejith, Murugan Ramaswamy
Summary: The study reveals that the lithium-ion diffusion kinetics in lithium titanate can be significantly improved through germanium incorporation, leading to enhanced electrochemical performance and increased discharge capacity of the battery.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Yu Huan, Mengyue Ma, Yuanhui Su, Dehua Dong, Xun Hu, Tao Wei
Summary: Oxide-ion conductors are commonly used in various environments for catalytic, conductive, and detecting purposes. However, the evaluation of intrinsic oxygen-ion transport in all environments has been limited. This study focuses on evaluating intrinsic oxide-ion conductivity and oxygen permeability in different environments and analyzing the factors that affect oxygen-ion transport.
JOURNAL OF MATERIOMICS
(2023)
Article
Chemistry, Physical
Antranik Jonderian, Rui Peng, Danielle Davies, Eric McCalla
Summary: The effect of single partial substitutions on perovskite (Li-La-Ti-O) materials was studied, and it was found that certain substituents enable pure-phase perovskite. The best substitutions had minimal impact on bulk conductivity but induced minor enhancements in the grain boundary conductivity. Some substitutions also increased the electronic conductivity, making them good candidates for the electrolyte in all-solid-state batteries.
CHEMISTRY OF MATERIALS
(2023)
Article
Chemistry, Physical
Wakako Araki, Wenbo Miao, Yoshio Arai
Summary: This molecular dynamics study investigates the Li-ion diffusion behavior in microdomains with ordered configurations in La2/3-xLi3xTiO3 (x = 0.115). Three apparent orientations of 90 degrees domain boundaries are considered, with each domain having an ordered structure in the out-of-plane direction. When there are no domain boundaries, the diffusion behavior depends on the order parameter. The introduction of domain boundaries significantly affects the conductivity and is influenced by various microstructural parameters such as the ordering of the structure in each domain, the orientation of the 90 degrees domain boundaries, the concentration of the domain boundaries, and the La-ion concentration at the domain boundaries.
SOLID STATE IONICS
(2023)
Article
Chemistry, Physical
Wanuk Choi, Segi Byun, Changho Yeon, Chan-Woo Lee, Iyan Subiyanto, Yuhyen Son, Seong Ok Han, Hyunuk Kim
Summary: Researchers address the issue of decreased capacity and stability in LTO by synthesizing defective LTO nanoparticles. The defective LTO exhibits high stability and discharge capacity close to the theoretical value. This study provides a new perspective for the development of Li-ion electrode materials with high capacity and long-term stability.
APPLIED SURFACE SCIENCE
(2023)
Article
Chemistry, Physical
Hui Yang, Muhammad Abdullah, Joeseph Bright, Weiguo Hu, Kevin Kittilstved, Yaobin Xu, Chongmin Wang, Xiangwu Zhang, Nianqiang Wu
Summary: Hydrogen treatment of LLTO nanofibers improved ion conductivity and chemical interaction in the composite electrolyte, leading to stable battery performance at room temperature.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Multidisciplinary
By Zeyi Wu, Chengjie Lu, Fei Ye, Lin Zhang, Le Jiang, Qiang Liu, Hongliang Dong, Zhengming Sun, Linfeng Hu
Summary: A bilayer-structured VOPO4.2H(2)O (bilayer-VOP) nanosheet with high-concentration oxygen vacancies was developed through a facile liquid-exfoliation strategy. The nanosheets showed superior properties in zinc-ion transport coefficient and electron conductivity, leading to outstanding performance in rechargeable zinc-ion batteries.
ADVANCED FUNCTIONAL MATERIALS
(2021)
Article
Chemistry, Physical
Shan Wang, Shijie Jiang, Yunjiao Li, Zhouliang Tan, Shuaipeng Hao, Jiachao Yang, Zhengjiang He
Summary: To overcome the challenges with LiMn2O4, a simple and effective strategy of incorporating WO2.72 into LMO has been proposed. The addition of WO2.72 induces the formation of oxygen vacancies, improves the adsorption and storage of active oxygen, and reduces the energy barrier for lithium ion migration. The formation of a Li2WO4 coating helps improve the electrode-electrolyte interface. The optimized W4000 sample demonstrates superior cycle performance compared to bare LMO.
JOURNAL OF POWER SOURCES
(2023)
Article
Green & Sustainable Science & Technology
J. -X. Cai, H. -L. Zhu, W. Liu, Y. -X. Qi, H. Yang, T. Li, Y. -J. Bai
Summary: Melamine-modified Li2ZnTi3O8 (LZTO) synthesized via a hydrothermal method demonstrated improved electrochemical performance, including reduced polarization, high capacity, excellent cyclability, and optimal rate performance. The melamine coating gradually transformed into solid electrolytes of Li3N and LiNxOy, contributing to enhanced ionic conductivity, while oxygen vacancies introduced in LZTO facilitated electron and ion conductance. The study clarified the reaction mechanism of LZTO during long-term cycling.
MATERIALS TODAY SUSTAINABILITY
(2022)
Article
Nanoscience & Nanotechnology
Zhenjie Liu, Yudai Huang, Yanjun Cai, Xingchao Wang, Yue Zhang, Yong Guo, Juan Ding, Wenhua Cheng
Summary: A two-dimensional LTO nanosheet with ultrafast charge storage oxygen vacancy was successfully fabricated to enhance Li+ ion mobility for high-rate lithium storage. Doping Al3+ into octahedron Li+/Ti4+ 16d sites not only provides stability to the Ti-O framework, but also lowers the energy barrier for Li+ ion diffusion, ultimately leading to excellent electrochemical performance.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Zesen Wei, Chen Liang, Lihua Jiang, Linjun Wang, Siyuan Cheng, Qingkui Peng, Lei Feng, Wenhua Zhang, Jinhua Sun, Qingsong Wang
Summary: This study focuses on the secondary particles of different Li(NixCoyMnz)O-2 cathodes, investigating the formation and condensation of oxygen vacancies on the surface, as well as the concentration distribution of oxygen vacancies inside the particles after thermal failure. The results show that increasing the Ni content promotes the diffusion of oxygen vacancies from the surface to the bulk, leading to an increase in oxygen vacancy concentration and the release of more oxygen. When the Ni content reaches 0.8, both the surface layer and bulk of the secondary particles exhibit high oxygen vacancy concentrations, resulting in overall failure. Furthermore, the formation and evolution of intergranular cracks inside the secondary particles depend on the oxygen vacancy concentration gradient.
ENERGY STORAGE MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
O. V. Sreejith, M. S. Indu, George V. Alexander, Ramaswamy Murugan
Summary: The presence of germanium in lithium titanate (LTO) was found to effectively reduce cell impedance, improve Li+ ion diffusion, and enhance capacity. The optimal doped composition (Li4Ge0.1Ti4.9O12) demonstrated good cycling stability and high capacity at different rates.
MATERIALS TODAY COMMUNICATIONS
(2021)
Article
Engineering, Environmental
Juan Ding, Yudai Huang, Zhenjie Liu, Xingchao Wang, Yue Zhang, Yong Guo, Rui Sheng, Dianzeng Jia, Xincun Tang, Lei Wang
Summary: Fe2Mo3O8 composites with adjusted molar ratio were synthesized for lithium storage and exhibited pseudocapacitive behavior. The unique characteristics significantly enhance Li+ ion diffusion kinetics and improve pseudocapacitance contribution, resulting in high energy/power density and long cycle stability.
CHEMICAL ENGINEERING JOURNAL
(2022)
Article
Electrochemistry
Xiaotong Liu, Qiang Weng, Tao Liu, Zhiyuan Tang, Haoqing Tang
Summary: Li2ZnTi3O8 (LZTO) has been studied as a potential anode material for rechargeable lithium-ion batteries, however, its high-rate capacity is limited due to slow Li-ion diffusion kinetics and side reactions at the electrode/electrolyte interface. This study investigates the use of Li3PO4 as a lithium ion conductor and modifier to improve the crystal structure and electrochemical properties of LZTO. The Li3PO4-coated LZTO electrode shows enhanced electrochemical performance with high capacity retention, low electrode polarization, and good cycling stability at high temperatures.
ELECTROCHIMICA ACTA
(2023)
Article
Chemistry, Physical
Lena Spitthoff, Markus Solberg Wahl, Preben J. S. Vie, Odne Stokke Burheim
Summary: In this study, thermal conductivities of pristine and degraded electrodes from commercial lithium-ion batteries were measured under different conditions. The effect of degradation on thermal transport was assessed, and the overall cell cooling efficiency was reported. The reduction in electrode thermal conductivity was found to be up to 65%, with the highest decrease observed in dry graphite anodes. Mechanical clamping and cold temperatures were found to mitigate the reduction in thermal conductivity, while decreased wetting and reduction of electrolyte solvent were identified as the main causes for decreased cell cooling efficiency and full cell thermal conductivity.
JOURNAL OF POWER SOURCES
(2023)
Article
Chemistry, Multidisciplinary
Zhao Min Sheng, Cheng Yang Hong, Xian You Dai, Cheng Kang Chang, Jian Bin Chen, Yan Liu
JOURNAL OF NANOSCIENCE AND NANOTECHNOLOGY
(2015)
Article
Chemistry, Physical
Yuanyuan Cai, Dongyun Zhang, Chengkang Chang, Zhaomin Sheng, Kejun Huang
Article
Materials Science, Multidisciplinary
Qian Guo, Dongyun Zhang, Chengkang Chang, Zhaomin Sheng, Kejun Huang
Article
Chemistry, Applied
Zhao Min Sheng, Ming Hui Hu, Xian You Dai, Cheng Yang Hong, Cheng Kang Chang, Qi Zhong Chen, Xin Jian Chang
MICROPOROUS AND MESOPOROUS MATERIALS
(2016)
Article
Chemistry, Multidisciplinary
Cheng Yang Hong, Zhao Min Sheng, Ming Hui Hu, Xian You Dai, Cheng Kang Chang, Qi Zhong Chen, Dong Yun Zhang
Article
Chemistry, Multidisciplinary
Zhao Min Sheng, Xin Jian Chang, Yu Hang Chen, Cheng Yang Hong, Na Na Li, Cheng Kang Chang, Run Ping Jia, Sheng Han
Article
Chemistry, Multidisciplinary
Peng Xiao, Yuanyuan Cai, Xueping Chen, Zhaomin Sheng, Chengkang Chang
Article
Electrochemistry
Zhao Min Sheng, Cheng Yang Hong, Na Na Li, Qi Zhong Chen, Run Ping Jia, Dong Yun Zhang, Sheng Han
ELECTROCHIMICA ACTA
(2018)
Article
Materials Science, Ceramics
Sheng Zhao-Min, Wang Ying, Chang Cheng-Kang, Liu Xiao-Rong, Zhang Dong-Yun, Liu Yan
JOURNAL OF INORGANIC MATERIALS
(2013)
Article
Chemistry, Multidisciplinary
Na Na Li, Zhao Min Sheng, Hao Liang Tian, Cheng Kang Chang, Run Ping Jia, Sheng Han
Article
Chemistry, Physical
Na Na Li, Zhao Min Sheng, Huan Huang, Zu Zhong Gan, Cheng Kang Chang, Run Ping Jia, Sheng Han
JOURNAL OF ALLOYS AND COMPOUNDS
(2019)
Article
Chemistry, Analytical
Zhao Min Sheng, Zu Zhong Gan, Huan Huang, Rui Liang Niu, Zhi Wei Han, Run Ping Jia
SENSORS AND ACTUATORS B-CHEMICAL
(2020)
Article
Electrochemistry
Run Ping Jia, Zu Zhong Gan, Huan Huang, Zhao Min Sheng
Summary: A mesoporous carbon catalyst with ultra-high nitrogen-doping has been successfully synthesized by a three-step process, demonstrating efficient catalysis of oxygen reduction reaction (ORR). The addition of ionic compounds and the use of MgO as a template are crucial steps in achieving high N content and excellent electrochemical performance. The prepared catalyst exhibits unique electro-catalysis with higher stability compared to commercial Pt/C catalyst.
ELECTROCHIMICA ACTA
(2021)
Article
Chemistry, Physical
Zu Zhong Gan, Zhao Min Sheng, Huan Huang, Xian You Dai, Rui Liang Niu, Run Ping Jia
SUSTAINABLE ENERGY & FUELS
(2019)
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)