Introduction: After a series of hydrothermal/solvent thermal synthesis methods for vanadium fluoride, they further proposed that vanadium residue extracted from vanadium-vanadium acid sodium solution as vanadium raw material, directly prepared vanadium fluoride, developed a convenient room temperature controllable preparation technology, which will make the material production cost greatly reduced.
The process engineering of the Chinese Academy of Vanadium fluoride produced by this method is shown Recently, reporters from the Chinese Academy of Sciences, the Institute of Process Engineering learned that the Department of Green Chemical Research, deputy researcher Zhao Junmei team developed a poly anion compound low-cost convenient room temperature controllable technology, and for the first time synthesized sodium ion battery high voltage cathode material fluorine phosphate vanadium sodium, The material has excellent magnification performance and long cycle performance without any post-treatment, so it can be said that the laboratory research on vanadium fluoride has reached the international leading level.
The results of the study were recently published in the "Joule", the energy flagship journal of Cell Publishing House. In view of the high price of lithium resources, limited geological reserves and other limitations on the future development of lithium ions, and lithium-ion batteries have similar working principle of the sodium ion battery is placed great expectations. ' Sodium in the Earth's crust is much higher than lithium, and is expected to support the sustainable development of large-scale energy storage technologies.
' Zhao Junmei told the Chinese Science Daily Reporter. The large-scale low-cost preparation of a kind of important cathode material of sodium ion battery ' poly-anionic compound fluorine phosphate sodium ' is restricting its commercialization process. These materials have an energy density of up to 480 wh/kg, and the energy density of the entire battery can be comparable to that of lithium-ion batteries if sodium fluoride can be used industrially.
This material has been used since the first report by French scientist J.-m Le Meins in 1999, and has been followed by a high-temperature solid-phase synthesis method, which has resulted in higher cost of the material. The Zhao Junmei team has long been committed to low-energy green synthesis of vanadium fluoride.
Recently, after a series of hydrothermal/solvent thermal synthesis methods for vanadium fluoride were studied, they further proposed that vanadium residue extracted from vanadium-vanadium acid sodium solution as vanadium raw material, directly prepared vanadium fluoride, developed a convenient room temperature controllable preparation technology, which will make the material production cost greatly reduced.
According to the researchers, the results obtained by this method of vanadium fluoride is a multi-shell micro-structure of the microspheres, the formation mechanism is mainly based on in situ generated bubbles as a soft template, and gas-liquid-solid interface layer self-assembly result. ' This research will certainly accelerate the process of industrialization of vanadium fluoride.
' Zhao Junmei thought.
It is reported that this is the first time at room temperature one-step controllable synthesis of a poly-anionic compound, but also the cathode material of the conventional high-temperature solid-phase method and hydrothermal synthesis of the challenge. Chinese Academy of Sciences process at room temperature one-step synthesis of cathode materials for sodium ion batteries
