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Article
Chemistry, Physical
Tongshuai Wang et al.
Summary: Li-ion batteries with layered cathodes can alleviate the limited range of electric vehicles, but the scarcity of Co hinders their widespread use. Eliminating Co from layered cathodes is necessary for the global adoption of electric vehicles, but Co-free cathodes face challenges in suppressing Li/Ni mixing. Various metals have been proposed as replacements for Co, with the priority being to suppress Li/Ni mixing.
ADVANCED ENERGY MATERIALS
(2023)
Review
Chemistry, Multidisciplinary
Haixia Ren et al.
Summary: This review systematically summarizes the development history and mechanism of anionic redox reaction in layered transition metal oxides. Challenges and strategies for triggering and stabilizing anionic redox are discussed, and different types of sodium layered oxide cathodes are classified and compared. The review also provides an overview of characterization techniques for anionic oxygen redox. Finally, the prospective and future development directions of sodium layered transition oxide with anionic redox reaction are analyzed and suggested.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Yangyang Huang et al.
Summary: In this study, stable anionic redox reactions were achieved by substituting sodium ions with magnesium ions in P2-type sodium-rich layered oxide. The density functional theory (DFT) calculations showed that magnesium substitution effectively decreased the oxygen chemical potential, leading to improved lattice oxygen stability. It was also found that at a highly desodiated state, the remaining magnesium ions in the lattice could interact with oxygen 2p orbitals, facilitating the reversibility of oxygen redox. Cycling tests demonstrated that Na0.773Mg0.03Li0.25Mn0.75O2 exhibited better cycle stability compared to Na0.83Li0.25Mn0.75O2. The experimental results also showed that Na0.773Mg0.03Li0.25Mn0.75O2 had a zero-strain cathode behavior.
ADVANCED MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Kang-Hui Tian et al.
Summary: High entropy oxides (HEOs) have shown promising application prospects in energy storage, and the six-element HEOs with spinel structure exhibit outstanding lithium storage performances due to synergy effect and entropy stabilization. Among them, (CoNiZnFeMnLi)3O-4 delivers higher initial discharge specific capacity, better cycle stability, and rate performance in the half-cell. Ex situ X-ray diffraction reveals the electrochemical reaction mechanism, contributing to the excellent cycle and rate performance. This research provides fresh insights for the development of advanced energy storage materials for high-performance batteries.
Article
Chemistry, Physical
Katarzyna Walczak et al.
Summary: This paper introduces a high-entropy layered oxide NaMn0.2Fe0.2Co0.2Ni0.2Ti0.2O2, which exhibits superior electrochemical properties and stable capacity. Through structural analysis and computational modeling, the study provides a comprehensive understanding of the reorganization mechanism of the cathode structure. Fundamental understanding of the phase transformation is crucial for tailoring structural composition and achieving high-performance cathodes.
ENERGY STORAGE MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Feixiang Ding et al.
Summary: In this study, a high-entropy configuration strategy was used to improve the NaxTMO2 cathode materials, which enhanced the skeleton structure and particle morphology, leading to improved Na+ transport kinetics and battery performance, as well as enhanced thermal safety.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2022)
Article
Multidisciplinary Sciences
Fang Fu et al.
Summary: A strategy of stabilizing the structure and promoting anionic redox through configurational entropy and ion-diffusion structural tuning is reported for Mn-rich layered cathodes in Na-based batteries. The developed P2-type layered cathodes possess improved structural and thermal stability, faster anionic redox kinetics, and higher capacity retention.
NATURE COMMUNICATIONS
(2022)
Article
Chemistry, Multidisciplinary
Xiang Li et al.
Summary: Sodium-ion batteries are considered as a promising option for large-scale energy storage. Layered iron/manganese oxide cathodes have garnered considerable attention due to their abundance of elements and high theoretical capacity. This study proposes a strategy of anion-cation synergetic redox to suppress structural deterioration and improve electrochemical performance. The results demonstrate that the Na0.8Li0.2Fe0.2Mn0.6O2 electrode exhibits resistance to moisture erosion, solid solution behavior, and excellent reversible capacity and cycling stability.
Article
Chemistry, Multidisciplinary
Yao Xiao et al.
Summary: This study reports the concept of accurately manipulating structural evolution and formulating high-performance heterostructured biphasic layered oxide cathodes for sodium-ion batteries. The research shows that this strategy can achieve excellent rate performance and cycling stability for the cathode material, while maintaining good compatibility with the anode.
ADVANCED MATERIALS
(2022)
Article
Chemistry, Physical
Haixia Ren et al.
Summary: By surface coating and doping modification, the electrochemical performance of P2-NaNM@Zr material can be significantly improved, achieving stable and reversible anionic redox reaction and improving the capacity retention and cycling performance of sodium-ion batteries.
Article
Multidisciplinary Sciences
Rui Zhang et al.
Summary: By using a new compositionally complex doping strategy, researchers have successfully fabricated a high-Ni, zero-Co layered cathode with extremely high thermal and cycling stability. The cathode exhibits nearly zero volumetric change, greatly reducing lattice defects and local strain-induced cracks. This study is of great significance for addressing the safety and stability concerns of high-Ni, zero-Co cathode materials.
Article
Chemistry, Physical
Kanghui Tian et al.
Summary: A new six-component high-entropy oxide (HEO) layered cathode was designed and prepared to achieve highly reversible electrochemical reactions and phase-transition behavior, exhibiting good cycling performance and outstanding rate capability. The enhanced performance can be attributed to the disordered distribution of multi-component transition metals in HEO suppressing the ordering of electric charges and sodium vacancies, thereby inhibiting the interlayer slide and phase transition. In situ X-ray diffraction and spectroscopy techniques confirmed the effectiveness of high-entropy designing in stabilizing the layered structure and improving the cycling stability and rate capability of sodium-ion batteries.
JOURNAL OF MATERIALS CHEMISTRY A
(2022)
Review
Chemistry, Physical
Claude Delmas et al.
Summary: This paper provides an overview of research on lithium and sodium layered materials as positive electrodes in lithium (sodium)-ion batteries, focusing on the solid-state chemistry's role in discovering new materials and optimizing properties for different applications. Layered structures, especially lithium-based ones, are considered as the best candidates for high energy density batteries for mobile applications. Through high-temperature solid-state chemistry, many substituted phases have been obtained to stabilize the layered structure and increase the specific capacity.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Zhengyan Lun et al.
Summary: High-entropy ceramics are solid solutions with compositional flexibility and wide applicability, showing substantial performance improvement in lithium-ion battery cathodes. The high-entropy concept leads to enhancements in energy density and rate capability, especially in cation-disordered rocksalt-type cathodes. High-entropy materials have the potential for various applications and the design of high-entropy solid solutions in the DRX space can further enhance performance in battery electrodes.
Article
Nanoscience & Nanotechnology
Yu-Jie Guo et al.
Summary: This study introduces the use of Na2O2 as a sacrificial sodium source to improve the energy density and cyclic stability of Na-ion full cells. Compared to the pristine cathode, the Na2O2-decorated cathode shows higher discharge capacity, better capacity retention, and improved rate capability in full cells with a carbon anode.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Physical
Huanqing Liu et al.
Summary: Fe/Ti co-substitution strategy was successfully employed to enhance the rate and cycling performances of P2-Na2/3Ni1/3Mn2/3O2 cathode material for sodium ion batteries. This strategy effectively stabilized the interlayer framework, suppressed Na+/vacancy ordering, and improved Na ion transport. The Fe/Ti co-substituted NFMT cathode exhibited high energy density, superior kinetics, and capacity retention.
JOURNAL OF POWER SOURCES
(2021)
Article
Chemistry, Physical
Rui Qi et al.
Summary: This study demonstrates an efficient strategy of improving the structural durability of iron- and manganese-based cathodes through dual heteroatom doping, resulting in cathode materials with excellent cyclability and rate capability for grid-scale energy storage systems.
Article
Chemistry, Physical
Natalia Voronina et al.
Summary: Stable cationic and anionic redox behavior were revealed in the O3-type layered Na[Ni2/3Ru1/3]O-2 cathode for sodium-ion batteries, leading to cycling stability and high capacity retention. The covalent characteristic of transition metal-oxygen and transition metal-transition metal bonds contributed to the cycling stability of the electrode. Operando studies confirmed the reversible electrochemical activity of Ni2+/Ni3+ and O2-/O1- redox reactions throughout the cycles.
ADVANCED ENERGY MATERIALS
(2021)
Article
Chemistry, Physical
Yuansheng Shi et al.
Summary: This study successfully synthesized phase-pure P3-Na0.75Mg0.08Co0.10Ni0.2Mn0.60O2 cathode material, effectively suppressing the P3-O3 phase transition through the incorporation of Mg, resulting in good cycling performance and rate capability.
ENERGY STORAGE MATERIALS
(2021)
Article
Nanoscience & Nanotechnology
Ya-Min Zheng et al.
Summary: The research utilized codoping of Cu and Zr to optimize the O3-type Na-Fe-Mn oxide cathode, improving its electrochemical performance and air stability, demonstrating potential applications in sodium-ion batteries.
ACS APPLIED MATERIALS & INTERFACES
(2021)
Article
Chemistry, Multidisciplinary
Ji Eun Wang et al.
Summary: This study presents a lithium-substituted Fe/Mn-based P2/O3 layered oxide that overcomes structural instability and effectively constrains undesirable phase transitions through honeycomb ordering. The results highlight the correlation between the P2/O3 biphasic structure and electrochemical performance.
Review
Chemistry, Multidisciplinary
Shiyong Chu et al.
Summary: This review comprehensively summarizes recent advances in high-performance cobalt-free cathode materials for advanced SIBs, analyzing the conflicts of structural/electrochemical stability with intrinsic insufficiencies of cobalt-free cathode materials, and discussing strategies for constructing stable cobalt-free cathode materials.
CHEMICAL SOCIETY REVIEWS
(2021)
Review
Chemistry, Multidisciplinary
Yanjiao Ma et al.
Summary: The essential demand for functional materials enabling the realization of new energy technologies has driven significant efforts in scientific and industrial research. High-entropy materials, with their unique structural characteristics and tunable functional properties, have gained increasing interest in the fields of environmental science and renewable energy technology. Effective strategies for designing high-entropy materials from computational techniques and experimental aspects provide researchers with guidance on potential advantages and remaining challenges.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Review
Chemistry, Physical
Azadeh Amiri et al.
Summary: The emergence of high-entropy materials has shown superior performance in energy conversion and storage applications, with higher electrocatalytic activities, cycling stability, and durability compared to traditional noble metal catalysts.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Review
Chemistry, Physical
Azadeh Amiri et al.
Summary: The emergence of high-entropy materials with their superior electrocatalytic and catalytic activities, as well as long cycling stability and durability, has led to new advancements in energy storage and conversion technologies.
JOURNAL OF MATERIALS CHEMISTRY A
(2021)
Review
Chemistry, Multidisciplinary
Qiannan Liu et al.
Summary: The exploration of next-generation sodium-ion batteries (SIBs) aims to replace lithium-ion batteries and address the depletion of lithium resources. Sodium transition metal oxides are considered promising cathode materials with anionic redox activity. Research on anionic redox in Li-rich transition metal oxides provides insight into high-capacity cathode materials for SIBs, with challenges and strategies discussed. It is expected that this work will provide new perspectives on controlling anionic redox activity and finding novel high-capacity oxide cathode materials for SIBs.
ENERGY & ENVIRONMENTAL SCIENCE
(2021)
Article
Chemistry, Multidisciplinary
Chenglong Zhao et al.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2020)
Article
Chemistry, Physical
Kaiying Xi et al.
Article
Chemistry, Physical
Siling Gu et al.
JOURNAL OF ALLOYS AND COMPOUNDS
(2020)
Review
Chemistry, Multidisciplinary
Xiao Yao et al.
ADVANCED FUNCTIONAL MATERIALS
(2020)
Editorial Material
Chemistry, Physical
Yang-Kook Sun
ACS ENERGY LETTERS
(2020)
Article
Multidisciplinary Sciences
Wenhua Zuo et al.
NATURE COMMUNICATIONS
(2020)
Article
Chemistry, Multidisciplinary
Qiuyu Shen et al.
Article
Engineering, Chemical
M. Kouthaman et al.
JOURNAL OF THE TAIWAN INSTITUTE OF CHEMICAL ENGINEERS
(2020)
Article
Chemistry, Physical
Bolei Shen et al.
JOURNAL OF COLLOID AND INTERFACE SCIENCE
(2019)
Article
Chemistry, Multidisciplinary
Qin-Chao Wang et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2019)
Review
Chemistry, Physical
Qiang Bai et al.
ADVANCED ENERGY MATERIALS
(2018)
Article
Chemistry, Multidisciplinary
Jing Zhao et al.
Article
Multidisciplinary Sciences
Shaohua Guo et al.
Article
Chemistry, Multidisciplinary
Hu-Rong Yao et al.
JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
(2017)
Article
Multidisciplinary Sciences
Shaohua Guo et al.
NATURE COMMUNICATIONS
(2017)
Article
Chemistry, Physical
Cancan Zhang et al.
