Article
Materials Science, Ceramics
Yi Huang, Xin Liu, Yue Jiang, Xiaohong Zhu
Summary: In this study, textured LLTO was synthesized by molten salt method, and the effects of reaction temperature and molten salts on the template growth of LLTO were investigated. The research shows that temperature and molten salt have significant impacts on the morphology and orientation of LLTO, and the use of LiCl-KCl molten salt can promote its preferential growth.
CERAMICS INTERNATIONAL
(2021)
Article
Materials Science, Ceramics
Seung Jin Baek, Eunho Cha, Dong Gyu Kim, Jong Hyuk Yun, Do Kyung Kim
Summary: In this study, a reaction-sintering strategy was proposed to prepare dense and highly conductive Li1.5Al0.5Ge1.5(PO4)3 (LAGP) solid electrolyte at lower temperatures. Additionally, MoS2 coating was applied to reduce interfacial resistance and prevent electrolyte degradation. The MoS2@LAGP symmetric cells showed stable cycling performance at lower current density.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Siavash M. Alizadeh, Hamed Mohebbi, Mohammad Golmohammad, Omid Sharifi, Farshid Farzaneh
Summary: The high sintering temperature is a major challenge in preparing a dense and ionic conductive yttria-stabilized zirconia (YSZ) solid electrolyte. Iron has been investigated as an efficient additive for YSZ to reduce its sintering temperature while minimizing the detrimental effect on ionic conductivity. This study explores the effects of iron on the physical, microstructural, and electrical properties of YSZ. The results demonstrate that iron does not affect the stability of the cubic phase structure, but its presence affects the oxygen vacancy concentrations and grain boundary conductivity.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Materials Science, Ceramics
Ying Zhang, Andong Liu, Zongmo Shi, Siyu Ge, Junzhan Zhang
Summary: The study focused on the preparation process of Li6.25Al0.25La3Zr2O12 solid electrolyte, demonstrating that cold sintering technology can improve the density and Li+ conductivity of the electrolyte.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Materials Science, Multidisciplinary
E. A. Il'ina, K. Druzhinin, E. D. Lyalin, M. S. Plekhanov, I. I. Talankin, B. D. Antonov, A. A. Pankratov
Summary: In this study, Li-In alloys with different lithium contents were obtained and it was found that indium is evenly distributed in the obtained alloys. The elastic modulus and wettability of the alloys were investigated using atomic force microscopy and high-temperature optical dilatometry. It was discovered that using Li-In alloy as an anode leads to a significant reduction in interface resistance between the metallic anode and solid electrolyte.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Energy & Fuels
El Abadila Iffer, Mohammed Belaiche, Moustapha Elansary, Yanxia Wang, Yuliang Cao
Summary: The molten salt synthesis method offers a cost-effective, scalable, and environmentally friendly approach for synthesizing nanomaterials. The first synthesis of LiMn1.2Ni0.3Cr0.1Co0.15Al0.23La0.02O4 compound using this method showed stable formation of pure spinel phase with nanoparticles ranging from 77 to 135 nm in size. Analysis demonstrated enhanced lithium insertion in the spinel structure, leading to improved cathode material capacity.
INTERNATIONAL JOURNAL OF ENERGY RESEARCH
(2021)
Article
Chemistry, Physical
Yanhua Zhang, Yuxin Deng, Xinglong Gao, Chao Lv, Dawei Luo, Xing Xiang
Summary: The study investigated the influence of sintering temperature, washing solvent, and mother powder distribution on LLZO, revealing that pure cubic LLZO can be obtained at 1300 degrees Celsius for 80 minutes with high lithium ion conductivity. Washing with LiOH solution resulted in lower lithium ion conductivity compared to deionized water washing due to excessive Li+ concentration. Excessive mother powder on the upper surface is beneficial to obtain cubic phase LLZO.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Applied
Xiaoqian Xu, Yurun Feng, Zhaoyu Zhong, Xue Guo, Zhenhao Zhang, Jiao Li, Shikai Zhao, Shigang Wu, Haibin Sun
Summary: In this study, high-quality YSZ nano-powders were successfully synthesized using an improved solid-state reaction method, and applied for the fabrication of high-performance SOFC electrolytes. The nano-powders exhibited small grain size and high dispersibility, resulting in dense electrolytes with high conductivity at a relatively low sintering temperature. The anode-supported single cell using this electrolyte showed a high peak power density under experimental conditions.
JOURNAL OF RARE EARTHS
(2023)
Article
Chemistry, Physical
Xiangchao Zhao, Yuansong Luo, Xiujian Zhao
Summary: This study improves the sintering characteristics and performance of the NASICON-type solid electrolyte LATP by introducing TeO2 as a sintering aid, and significant progress has been made.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Ceramics
Stephen Heywood, Matt Lessmeier, David Driscoll, Stephen Sofie
Summary: Lithium lanthanum zirconium oxide (LLZO) garnet is a promising solid-state lithium ion conducting electrolyte for all-solid-state batteries due to its chemical stability. However, the stability and conductivity of LLZO are highly sensitive to lithium stoichiometry, requiring stabilizing agents and excess lithium. This study discovered that the sensitivity of LLZO to lithium volatility can be reduced through early incorporation of excess lithium carbonate during initial phase formation, leading to improved conductivity and microstructural uniformity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Green & Sustainable Science & Technology
Celastin Bebina Thairiyarayar, Chia-Hung Huang, Yasser Ashraf Gandomi, Chien-Te Hsieh, Wei-Ren Liu
Summary: A sulfide-based solid-state electrolyte with good ionic conductivity under ambient conditions is developed, and its performance in energy storage systems is investigated, demonstrating stable and reliable energy storage capabilities.
Article
Chemistry, Physical
Pengfei Zhou, Kaitong Sun, Shunping Ji, Zirui Zhao, Ying Fu, Junchao Xia, Si Wu, Yinghao Zhu, Kwun Nam Hui, Hai-Feng Li
Summary: As a typical solid-state electrolyte, Na1+xZr2SixP3-xO12 NASICONs provide a platform for solid-state batteries with higher safety and energy densities. Improving ionic conductivity and reducing interfacial resistance between electrolytes and cathode materials are crucial for higher-efficiency solid-state batteries, which usually require high craftsmanship and high-pressure equipment. This study introduces an effective additive, MgF2, in synthesizing NASICONs, resulting in electrolytes with improved performance and fewer defects.
MATERIALS TODAY ENERGY
(2023)
Article
Chemistry, Multidisciplinary
Mykola Vinnichenko, Katja Waetzig, Alf Aurich, Christoph Baumgaertner, Mathias Herrmann, Chang Won Ho, Mihails Kusnezoff, Chang Woo Lee
Summary: The density, microstructure, and ionic conductivity of cold-sintered LATP ceramics prepared using liquid and solid sintering additives were studied. The results showed that by adjusting the additives and processing conditions, cold-sintered ceramics can achieve comparable or higher density and ionic conductivity than conventionally sintered ceramics.
Article
Chemistry, Physical
Xin Xu, Connor Carr, Xinqi Chen, Benjamin D. Myers, Ruiyun Huang, Weizi Yuan, Sihyuk Choi, Dezhi Yi, Charudatta Phatak, Sossina M. Haile
Summary: This study reveals the variation in grain boundary properties of polycrystalline ionic materials and the correlation between grain boundary resistance and impurity concentration. The findings suggest that the grain boundary resistance may be caused by impurity-generated space charge effects and driven by the energetics of impurity segregation.
ADVANCED ENERGY MATERIALS
(2021)
Article
Materials Science, Ceramics
Xing Xiang, Zecheng Fang, Xibei Wang, Zhenzhen Zhao, Haojun Zhang, Yu Zhang
Summary: The research shows that adding an appropriate amount of Li2O can improve the lithium ionic conductivity of LLZO and the cycling stability of lithium symmetric battery.
INTERNATIONAL JOURNAL OF APPLIED CERAMIC TECHNOLOGY
(2022)
Article
Chemistry, Physical
Karin Rettenmaier, Gregor A. Zickler, Guenther J. Redhammer, Thomas Berger
Summary: Mixed transition metal oxides are promising electrode materials for electrochemical energy storage and conversion. The synthesis of these materials with tailored composition, crystal structure, and morphology is crucial for optimizing their properties. This study reports on the room-temperature electrodeposition of a ternary oxide, ZnMnO3, using earth-abundant metals. The epitaxial growth of ZnMnO3 on ZnO nanowires results in a 2-dimensional morphology and shows promise for the direct growth of other mixed transition metal oxides on conductive substrates.
Article
Energy & Fuels
Patrick Posch, Sarah Lunghammer, Alexandra Wilkening, Katharina Hogrefe, H. Martin R. Wilkening
Summary: In this study, nucleus-specific Li-7 and Na-23 nuclear magnetic resonance (NMR) spectroscopy was used to investigate the motion processes in mixed-conducting Li4Na (x) Ti5O12 materials. The results show that the diffusivity of Li+ ions increases significantly in the early stages of chemical sodiation, while there is limited data on the diffusion properties of Na+ ions. In addition, the formation of interfacial solid solutions was observed at very low sodiation levels (x = 0.1), and these regions covered almost the entire crystallite area at x = 0.5, enabling facile long-range ion transport.
JOURNAL OF PHYSICS-ENERGY
(2023)
Article
Chemistry, Physical
Ilya A. Shkrob, Pavan Badami, John S. Okasinski, Marco-Tulio F. Rodrigues, Daniel P. Abraham
Summary: In this study, an operando X-ray crystallography method is used to visualize lithiation gradients and electrode assembly movement in a Li-metal cell. It is found that deposition and stripping of Li+ ions during charge and discharge lead to thickness changes and periodic movement of the Li foil. Additionally, continuous build-up of mossy Li on the anode causes irreversible drift of the assembly.
JOURNAL OF POWER SOURCES
(2023)
Article
Nanoscience & Nanotechnology
Erika P. P. Ramos, Abdeljalil Assoud, Laidong Zhou, Abhinandan Shyamsunder, Daniel Rettenwander, Linda F. F. Nazar
Summary: We have reported a new ion conductor, Na11Sn2SbSe12, which could be a possible candidate for a solid catholyte in composite cathodes for all-solid state Na-batteries. It possesses a room temperature ionic conductivity of 0.15 ± 0.03 mS cm(-1) and an activation energy of 0.39 ± 0.02 eV. Through a combination of Rietveld refinement and electrochemical impedance spectroscopy, we have investigated the sulfide solid solutions, Na11Sn2SbS12-xSex (x = 1 and 6), to understand the structure-property relationships governing ion transport in these materials.
Article
Chemistry, Inorganic & Nuclear
Valerie Werner, Ulrich Aschauer, Guenther J. Redhammer, Juergen Schoiber, Gregor A. Zickler, Simone Pokrant
Summary: Exploring photocatalysts for solar water splitting, Sille ' n-Aurivillius-type compounds have shown promise with their visible light activity and enhanced stability. This study focuses on a titanium-based oxychloride, La2.1Bi2.9Ti2O11Cl, which exhibits excellent photoelectrochemical water splitting performance under visible light irradiation. The compound's crystal structure, chemical composition, morphology, and light absorption capabilities were analyzed, and its activity for hydrogen and oxygen evolution reactions was evaluated. The incorporation of Ti4+ in Sille ' n-Aurivillius-type compounds highlights their potential as stable photocatalysts for visible light-driven solar water splitting.
INORGANIC CHEMISTRY
(2023)
Article
Chemistry, Physical
Jonas Spychala, H. Martin R. Wilkening, Alexandra Wilkening
Summary: Li2OHCl is a suitable Li+ ionic conductor composed of abundant elements excluding Li. Its low melting point enables easy synthesis methods. However, the clear picture of Li+ self-diffusion is still challenging to prove, as it is suggested to be coupled to OH- rotational dynamics in Li2OHCl.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Chemistry, Physical
Maria Gombotz, Caroline Hiebl, Florian Stainer, H. Martin R. Wilkening
Summary: The development of ceramic proton conductors is of great interest due to their potential use in energy storage systems. Li6La3ZrTaO12 (LLZTO) has been found to exhibit rapid Li+ diffusivity. By treating a single crystal in water or glacial acetic acid, mobile Li+ ions can be exchanged with protons, resulting in a mixed proton-lithium ionic conductor. In this study, the diffusion of H+ protons and Li+ ions in the exchanged LLZTO has been investigated using element-specific H-1 and Li-7 NMR spectroscopy. The results show slower long-range Li-7 diffusion but relatively high H+ diffusivity, albeit slower than Li+ dynamics. By measuring spin-lattice relaxation and self-diffusion coefficient D(H) of H+ dynamics, energy barriers and transport properties have been determined, suggesting the potential of designing fast transport pathways for protons in ceramics.
JOURNAL OF PHYSICAL CHEMISTRY C
(2023)
Article
Materials Science, Multidisciplinary
Patrick Bottke, Katharina Hogrefe, Julia Kohl, Suliman Nakhal, Alexandra Wilkening, Paul Heitjans, Martin Lerch, H. Martin R. Wilkening
Summary: The visualization of atomic or ionic jump processes on a nanometer length scale is important for understanding diffusion pathways in solid electrolytes. This study used high-resolution 6Li nuclear magnetic resonance (NMR) spectroscopy to investigate Li+ exchange processes in Li3VF6. The results confirmed the preferred diffusion pathways and provided further insights into ion dynamics between corner-shared Li-bearing polyhedra.
MATERIALS RESEARCH BULLETIN
(2023)
Article
Chemistry, Physical
Alexander Komar, Dirk Wilmer, Martin R. Wilkening, Ilie Hanzu
Summary: The determination of stray capacitance in impedance measuring cells is crucial for studying solid ion conductors. We present a general method that accurately determines stray capacitance and can be applied to various impedance cells or sample holders for temperature conductivity measurements. Experimental calibration on a 2032-type coin cell sample holder demonstrates the reliability of our method for impedance measurements of air sensitive materials. Our method serves as an example of good practice in the field of solid electrolytes, solid state batteries, and dielectric materials investigations.
SOLID STATE IONICS
(2023)
Article
Chemistry, Multidisciplinary
Jian-Fang Wu, Zheyi Zou, Bowei Pu, Lukas Ladenstein, Shen Lin, Wenjing Xie, Shen Li, Bing He, Yameng Fan, Wei Kong Pang, H. Martin R. Wilkening, Xin Guo, Chaohe Xu, Tao Zhang, Siqi Shi, Jilei Liu
Summary: The softness of sulfur sublattice and rotational PS4 tetrahedra in thiophosphates lead to liquid-like ionic conduction, while the existence of such conduction in rigid oxides remains unclear. This study discovers 1D liquid-like Li-ion conduction in LiTa2PO8 and its derivatives, enabled by doping strategies, with low activation energy and short mean residence time of Li ions on interstitial sites. The findings provide principles for the future design of improved solid electrolytes without modifications to achieve stable ionic transport.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Peng Zuo, Pavan Badami, Stephen E. Trask, Daniel P. Abraham, Chongmin Wang
Summary: Spinel-structured LiNixMn2-xO4 (LNMO) is a promising high-voltage cathode material for lithium-ion batteries. This study investigates the structural evolution of LNMO materials at the atomic scale during cycling. The key microstructural degradations, including transgranular cracking, secondary phase formation, and void formation, have been identified and extensively studied, providing a deeper understanding of the structural changes of LNMO during cycling.
Article
Chemistry, Physical
Shahbaz Ahmad, Mehmet Egilmez, Ramasamy Shanmugam, Wael Abuzaid, Shuchi Sharma, Ranga Rao Gangavarapu, Faisal Mustafa, Sami El-Khatib, Hussain Alawadhi, Arunachala M. Kannan
Summary: Developing nonprecious metal-based electrocatalysts with outstanding performance has been a major focus in the scientific community for the past decade. In this study, the electrocatalytic properties of equiatomic single-phase medium-entropy alloy electrodes with various compositions were investigated for the hydrogen evolution reaction. The results showed that the CoNi-(Cr/V) alloy exhibited the lowest overpotential and highest electrocatalytic activity, and all samples exhibited good stability.
ACS APPLIED ENERGY MATERIALS
(2023)
Article
Chemistry, Inorganic & Nuclear
Valerie Werner, Ulrich Aschauer, Gunther J. Redhammer, Juergen Schoiber, Gregor A. Zickler, Simone Pokrant
Summary: Exploring photocatalysts for solar water splitting is crucial for sustainable hydrogen production. Sille'n-Aurivillius-type compounds, with their unique electronic structure and visible light activity, show promise for photocatalytic and photoelectrochemical water splitting. This study fabricates a fully titanium-based oxychloride compound with a double-layered Sille'n-Aurivillius structure and demonstrates its high performance for visible light-driven oxygen evolution in water splitting. The incorporation of Ti4+ in Sille'n-Aurivillius compounds highlights their potential as stable photocatalysts for visible light-driven solar water splitting.
INORGANIC CHEMISTRY
(2023)
Article
Energy & Fuels
Juan Jose Patino, Carlos Velasquez, Edwin Ramirez, Rafael Betancur, Juan Felipe Montoya, Edwin Chica, Pablo Romero-Gomez, Arunachala Mada Kannan, Daniel Ramirez, Pedro Eusse, Franklin Jaramillo
Summary: Electrification using renewable energy sources is a viable solution to the global energy crisis, and Colombia needs to diversify its energy sources by utilizing green hydrogen as an energy carrier. This study explores the potential of various renewable energy sources and presents a case study demonstrating the feasibility of generating green hydrogen domestically. By analyzing the most promising regions and deployment strategies, predictions for the cost of hydrogen by 2050 are made.
Article
Mineralogy
Stylianos Aspiotis, Jochen Schlueter, Gunther J. Redhammer, Boriana Mihailova
Summary: The study successfully established a method for quantitative analysis of the crystal chemistry of biotite using non-destructive techniques such as Raman spectroscopy, allowing accurate determination of major and minor element contents. This is crucial for the preservation of cultural heritage.
EUROPEAN JOURNAL OF MINERALOGY
(2022)