This technology involves synthesizing an anode active material with an orthorhombic crystal structure by mixing lithium, magnesium, manganese, and vanadium sources in a specific molar ratio of 1:1-x:x:1 (0.5 ≤ x ≤ 0.8) and subjecting the mixture to heat treatment.
Conventional silicon anode materials suffer from significant volume expansion during charging and discharging, while lithium metal poses a risk of short circuits due to dendrite growth. Consequently, there has been a lack of new anode materials capable of reliably delivering high capacity and high power.
This technology achieves a LiMg1-xMnxVO4 (0.5 ≤ x ≤ 0.8) composition by precisely weighing and mixing the source materials, forming them into pellets with dimensions of 9–11 mm, and heat-treating them at 650–850℃ in an argon atmosphere to induce an orthorhombic crystal structure. This process ensures both electrochemical stability and high capacity. It can be applied to high-power lithium secondary batteries that must avoid the expansion issues of silicon anodes, as well as cells for power tools and small mobility devices that require reduced dendrite risks. Furthermore, it allows for the expansion of the anode material lineup through a simple solid-state reaction process.
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