Synthesis, structure, and electrochemical properties of O′3-type monoclinic NaNi0.8Co0.15Al0.05O2 cathode materials for sodium-ion batteries
文献情報
Pengfei Zhou, Xiaolan Liu, Junying Weng, Li Wang, Xiaozhong Wu, Zhichao Miao, Jinping Zhao, Jin Zhou, Shuping Zhuo
Sodium-ion batteries (SIBs) have shown great promise in stationary energy storage due to the abundance of low-cost sodium and the similar electrochemical mechanism to that of commercial lithium-ion batteries. O3-type layered NaNiO2 is considered as one of the most promising cathode materials for SIBs. However, it suffers from irreversible phase transitions, sluggish kinetics and poor mass-production techniques, incurring rapid capacity fading, poor rate performance and limited practical applications. Herein, a novel O′3-type layered NaNi0.8Co0.15Al0.05O2 with a monoclinic phase structure is synthesized by a scalable co-precipitation method followed by a high-temperature calcination process. The substitution of similar ionic radii and same valence Co3+ and Al3+ for Ni3+ enhances the structural stability and improves the reversibility of phase transitions during (de)sodiation processes. The hierarchical architecture of microspheres and assembling of primary nanocrystals, can provide high compacted density and supply short diffusion paths for sodium ion/electron transport simultaneously. Because of these superior merits, the monoclinic NaNi0.8Co0.15Al0.05O2 microspheres exhibit an initial reversible capacity of 153.9 mA h g−1 with a coulombic efficiency of 89.1% at 0.1C and remarkable capacity retention of 86.7% after 200 cycles at 1C, potentially serving as a high capacity and stable cathode material for SIB applications.
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Journal of Materials Chemistry A, B & C cover high quality studies across all fields of materials chemistry. The journals focus on those theoretical or experimental studies that report new understanding, applications, properties and synthesis of materials. The journals have a strong history of publishing quality reports of interest to interdisciplinary communities and providing an efficient and rigorous service through peer review and publication. The journals are led by an international team of Editors-in-Chief and Associate Editors who are all active researchers in their fields. Journal of Materials Chemistry A, B & C are separated by the intended application of the material studied. Broadly, applications in energy and sustainability are of interest to Journal of Materials Chemistry A, applications in biology and medicine are of interest to Journal of Materials Chemistry B, and applications in optical, magnetic and electronic devices are of interest to Journal of Materials Chemistry C. More than one Journal of Materials Chemistry journal may be suitable for certain fields and researchers are encouraged to submit their paper to the journal that they feel best fits for their particular article. Example topic areas within the scope of Journal of Materials Chemistry A are listed below. This list is neither exhaustive nor exclusive. Artificial photosynthesis Batteries Carbon dioxide conversion Catalysis Fuel cells Gas capture/separation/storage Green/sustainable materials Hydrogen generation Hydrogen storage Photocatalysis Photovoltaics Self-cleaning materials Self-healing materials Sensors Supercapacitors Thermoelectrics Water splitting Water treatment










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