South Korea develops a lithium metal battery that supports fast charging and delivers high energy density -Lithium - Ion Battery Equipment
According to foreign media reports, researchers at Hanyang University in Seoul, South Korea, have developed a lithium metal battery (LMb), in detail, a Li/NCM battery. They say the battery, designed with the operating requirements of electric vehicles in mind, outperforms lithium metal batteries previously described in the literature. The new LMb supports fast charging while delivering high energy density.
With a theoretical capacity of 3860mAh/g, lithium metal is an ideal anode material for high energy density energy storage batteries. However, when used in electric vehicles, the LMb needs to be adapted to the actual operating conditions. If the battery is rapidly charged, it usually accelerates the growth of harmful lithium dendrites and intensifies the parasitic reaction between the lithium metal anode and the electrolyte. Under fast charging and high active material loading states, the growth of lithium dendrites leads to lower cycle efficiency, which hinders the use of LMb in electric vehicles.
The Hanyang research team used a modified organic electrolyte and pre-solved lithium metal to form a solid solid electrolyte interface layer on the surface of the lithium negative electrode. After pretreatment of LiNO3 on the lithium metal negative electrode, a layer of Li2O-rich SEI film will be formed on the surface of the negative electrode, thereby providing the necessary mechanical strength and preventing the premature breakdown of the SEI layer.(Lithium - Ion Battery Equipment)
Combined with aluminum-doped full concentration gradient Li[Ni0.75Co0.10Mn0.15]O2 cathode, the researchers constructed a LMb with an areal capacity of 4.1mAhcm-2 at 3.6mAcm? At a high current density of 2, it can stably cycle more than 300 times, which is unprecedented. After 500 cycles in pouch cells, this LMb was able to retain 90% of its initial capacity. "We believe this study is an important step in the LMb design mileage to effectively stabilize the Li metal surface," the researchers said. "Furthermore, this work re-emphasizes the importance of selecting the optimal cathode material for practical use of LMbs." .
With a theoretical capacity of 3860mAh/g, lithium metal is an ideal anode material for high energy density energy storage batteries. However, when used in electric vehicles, the LMb needs to be adapted to the actual operating conditions. If the battery is rapidly charged, it usually accelerates the growth of harmful lithium dendrites and intensifies the parasitic reaction between the lithium metal anode and the electrolyte. Under fast charging and high active material loading states, the growth of lithium dendrites leads to lower cycle efficiency, which hinders the use of LMb in electric vehicles.
The Hanyang research team used a modified organic electrolyte and pre-solved lithium metal to form a solid solid electrolyte interface layer on the surface of the lithium negative electrode. After pretreatment of LiNO3 on the lithium metal negative electrode, a layer of Li2O-rich SEI film will be formed on the surface of the negative electrode, thereby providing the necessary mechanical strength and preventing the premature breakdown of the SEI layer.(Lithium - Ion Battery Equipment)
Combined with aluminum-doped full concentration gradient Li[Ni0.75Co0.10Mn0.15]O2 cathode, the researchers constructed a LMb with an areal capacity of 4.1mAhcm-2 at 3.6mAcm? At a high current density of 2, it can stably cycle more than 300 times, which is unprecedented. After 500 cycles in pouch cells, this LMb was able to retain 90% of its initial capacity. "We believe this study is an important step in the LMb design mileage to effectively stabilize the Li metal surface," the researchers said. "Furthermore, this work re-emphasizes the importance of selecting the optimal cathode material for practical use of LMbs." .
