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Sodium-ion batteries (SIBs) hold great promise for large-scale energy storage in the post-lithium-ion battery era due to their high rate performance and long lifespan, although their sluggish Na+ transformation kinetics still require improvement. Encouraged by the excellent electrochemical performance of titanium-based anode materials, here, we present a novel titanium vanadate@carbon (TVO@C) material as anode for SIBs. Our TVO@C material is synthesized via a facile coprecipitation method, with the following annealing process in an acetylene atomosphere. The opened ion channel and the oxygen vacancies within TVO@C facilitate the diffusion of Na+ ions, reducing their diffusion barrier. Thus, an ultrahigh rate of 100 A g−1 and long life of 10,000 cycles have been achieved. Furthermore, the TVO@C electrode exhibits stable performance, not only at room temperature, but also at temperatures as low as −20 °C. The TVO@C||Na3V2(PO4)3@C full cells have also achieved stable discharge/charge ....
Li3VO4 (LVO) is a promising anode material for use in Li-ion batteries (LIBs) owing to its safe discharge plateau and high capacity. However, its moderate Li+-diffusion coefficient and low electrical conductivity pose challenges to its widespread use in the LIB industry. In this study, hexavalent tungsten ions (W6+) were introduced to boost electrochemical kinetics, and W6+-doped LVO microspheres were successfully prepared using a spray-drying approach. Density functional theory (DFT) calculations reveal that the enhanced electronic conductivity and improved oxygen lattice following W6+ doping is possibly due to the development of a mid-gap state positioned above the valence band maximum. The doped LVO displayed excellent electrochemical performance, including a superior rate capability (288.9 mAh/g at 10C) and remarkable cycling stability (capacity fading of only 8.6 % over 200 cycles at 6C), which is ascribable to improved electrical conductivity and Li+ insertion/extraction. In addi ....
L&F, a Daegu-headquartered cathode materials producer, has not quit its efforts to build overseas factories, despite lingering skepticism about the battery industry amid the deceleration in global demand for electric vehicles, the company’s chief executive said. ....
EcoGraf ASX:EGR ASX Release / 26 March 2024 Product Qualification Facility Commissioning Commenced 'State of the Art' Facility utilising EcoGraf HFfree™ Proprietary Technology to Provide High Purity Battery Anode Material to the Global Battery. - Veroeffentlicht am 26.03.2024 ....
Westwater Resources Inc. , an energy technology and battery-grade natural graphite development company , is announcing an additional increase in Phase I production to 12,500 mt per year of battery-grade natural graphite anode material. In 2023,. - Veroeffentlicht am 27.02.2024 ....