Li Lei, Hu Chunhong, Li Juanjuan, Shen Anwei, Tan Shijiang
Air Force Aviation University, Changchun, P.R. China.
Air Force Harbin Flying College, Harbin, P.R. China.
Sci Prog. 2024 Jul-Sep;107(3):368504241276773. doi: 10.1177/00368504241276773.
Metal lithium negative electrodes are considered the "holy grail" of lithium battery negative electrodes due to their ultra-high energy density and low overpotential. However, the arbitrary growth of lithium dendrites during the cycling process hindered its industrialization process. We prepared porous carbon doped with zinc oxide nanoparticles (ZNC-MOF-5) by high-temperature carbonization of MOF-5, and coated ZNC-MOF-5 on the surface of commercial membranes (ZNC-MOF-5@PP). Used to improve the cycling stability of metal lithium negative electrodes. Zinc oxide nanoparticles in ZNC-MOF-5 have good lithium affinity and can promote Li deposition. The porous structure with a high specific surface area endows the electrode with high lithium loading capacity, reduces local current density, and obtains a dendrite-free metal lithium negative electrode. The electrochemical cycling performance of Li/Cu batteries indicates that, ZNC-MOF-5@PP. The separator can prevent the growth of dendrites and improve cycling stability, proving that ZNC-MOF-5 can effectively guide the deposition of Li and solve dendrite problems.
金属锂负极由于其超高的能量密度和低过电位，被认为是锂电池负极的“圣杯”。然而，在循环过程中锂枝晶的随意生长阻碍了其工业化进程。我们通过对MOF-5进行高温碳化制备了掺杂氧化锌纳米颗粒的多孔碳（ZNC-MOF-5），并将ZNC-MOF-5涂覆在商业隔膜表面（ZNC-MOF-5@PP）。用于提高金属锂负极的循环稳定性。ZNC-MOF-5中的氧化锌纳米颗粒具有良好的锂亲和力，能够促进锂的沉积。高比表面积的多孔结构赋予电极高锂负载能力，降低局部电流密度，从而获得无枝晶的金属锂负极。Li/Cu电池的电化学循环性能表明，ZNC-MOF-5@PP隔膜能够防止枝晶生长并提高循环稳定性，证明ZNC-MOF-5能够有效引导锂的沉积并解决枝晶问题。
