9V carbon battery

　　South Korea has developed a 9V carbon battery that supports fast charging and provides high energy density

　　South Korea has developed a 9V carbon battery that supports fast charging and provides high energy density - According to foreign media reports, researchers at Hanyang University in Seoul, South Korea, have developed a 9V carbon battery (LMB), specifically Li/ NCM battery. They said the battery was designed with the operating requirements of electric vehicles in mind and performed better than lithium metal batteries mentioned in previous literature. The new LMB supports fast charging while delivering high energy density.

　　According to foreign media reports, researchers at Hanyang University in Seoul, South Korea, have developed a 9V carbon battery (LMB), specifically a Li/NCM battery. They said the battery was designed with the operating requirements of electric vehicles in mind and performed better than lithium metal batteries mentioned in previous literature. The new LMB supports fast charging while delivering high energy density.

　　Lithium metal has a theoretical capacity of 3860mAh/g and is an ideal anode material for high energy density energy storage batteries. However, when applied to electric vehicles, LMB needs to be adapted to actual operating conditions. If the battery is charged quickly, the growth of harmful lithium dendrites will usually be accelerated, exacerbating the parasitic reaction between the lithium metal anode and the electrolyte. Under fast charging and high active material loading conditions, the growth of lithium dendrites leads to reduced cycle efficiency, thus hindering the use of LMB in electric vehicles.

　　The Hanyang research team used modified organic electrolytes and pretreated lithium metal to form a stable solid electrolyte interface layer on the surface of the lithium anode. After LiNO3 pretreatment of the lithium metal anode, a Li2O-rich SEI film will be formed on the surface of the anode, thereby providing the necessary mechanical strength and preventing premature breakdown of the SEI layer.

　　Combined with the aluminum-doped full concentration gradient Li[Ni0.75Co0.10Mn0.15]O2 cathode, the researchers constructed an LMB with an area capacity of 4.1mAhcm-2 at 3.6mAcm? At a high current density of 2, it can be cycled stably for more than 300 times, which is unprecedented. This LMB was able to maintain 90% of its initial capacity after 500 cycles in a pouch battery. The researchers said: "We believe that this research is an important step in the design milestone of LMB and can effectively stabilize the lithium metal surface. In addition, this work also re-raises the importance of selecting the best cathode material in practical applications of LMB. .

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